Calculate the runtime of the softirq events and subtract it from
the corresponding task runtime to improve the precision.
Example usage:
# perf kwork -k sched,irq,softirq record -- perf record -e cpu-clock -o perf_record.data -a sleep 10
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.467 MB perf_record.data (7154 samples) ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 2.152 MB perf.data (22846 samples) ]
# perf kwork top
Total : 136601.588 ms, 8 cpus
%Cpu(s): 95.66% id, 0.04% hi, 0.05% si
%Cpu0 [ 0.02%]
%Cpu1 [ 0.01%]
%Cpu2 [| 4.61%]
%Cpu3 [ 0.04%]
%Cpu4 [ 0.01%]
%Cpu5 [||||| 17.31%]
%Cpu6 [ 0.51%]
%Cpu7 [||| 11.42%]
PID %CPU RUNTIME COMMMAND
----------------------------------------------------
0 99.98 17073.515 ms swapper/4
0 99.98 17072.173 ms swapper/1
0 99.93 17064.229 ms swapper/3
0 99.62 17011.013 ms swapper/0
0 99.47 16985.180 ms swapper/6
0 95.17 16250.874 ms swapper/2
0 88.51 15111.684 ms swapper/7
0 82.62 14108.577 ms swapper/5
4342 33.00 5644.045 ms perf
4344 0.43 74.351 ms perf
16 0.13 22.296 ms rcu_preempt
4345 0.05 10.093 ms perf
4343 0.05 8.769 ms perf
4341 0.02 4.882 ms perf
4095 0.02 4.605 ms kworker/7:1
75 0.02 4.261 ms kworker/2:1
120 0.01 1.909 ms systemd-journal
98 0.01 2.540 ms jbd2/sda-8
61 0.01 3.404 ms kcompactd0
667 0.01 2.542 ms kworker/u16:2
4340 0.00 1.052 ms kworker/7:2
97 0.00 0.489 ms kworker/7:1H
51 0.00 0.209 ms ksoftirqd/7
50 0.00 0.646 ms migration/7
76 0.00 0.753 ms kworker/6:1
45 0.00 0.572 ms migration/6
87 0.00 0.145 ms kworker/5:1H
73 0.00 0.596 ms kworker/5:1
41 0.00 0.041 ms ksoftirqd/5
40 0.00 0.718 ms migration/5
64 0.00 0.115 ms kworker/4:1
35 0.00 0.556 ms migration/4
353 0.00 2.600 ms sshd
74 0.00 0.205 ms kworker/3:1
33 0.00 1.576 ms kworker/3:0H
30 0.00 0.996 ms migration/3
26 0.00 1.665 ms ksoftirqd/2
25 0.00 0.662 ms migration/2
397 0.00 0.057 ms kworker/1:1
20 0.00 1.005 ms migration/1
2909 0.00 1.053 ms kworker/0:2
17 0.00 0.720 ms migration/0
15 0.00 0.039 ms ksoftirqd/0
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-13-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Calculate the runtime of the hardirq events and subtract it from
the corresponding task runtime to improve the precision.
Example usage:
# perf kwork -k sched,irq record -- perf record -o perf_record.data -a sleep 10
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 1.054 MB perf_record.data (18019 samples) ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.798 MB perf.data (16334 samples) ]
#
# perf kwork top
Total : 139240.869 ms, 8 cpus
%Cpu(s): 94.91% id, 0.05% hi
%Cpu0 [ 0.05%]
%Cpu1 [| 5.00%]
%Cpu2 [ 0.43%]
%Cpu3 [ 0.57%]
%Cpu4 [ 1.19%]
%Cpu5 [|||||| 20.46%]
%Cpu6 [ 0.48%]
%Cpu7 [||| 12.10%]
PID %CPU RUNTIME COMMMAND
----------------------------------------------------
0 99.54 17325.622 ms swapper/2
0 99.54 17327.527 ms swapper/0
0 99.51 17319.909 ms swapper/6
0 99.42 17304.934 ms swapper/3
0 98.80 17197.385 ms swapper/4
0 94.99 16534.991 ms swapper/1
0 87.89 15295.264 ms swapper/7
0 79.53 13843.182 ms swapper/5
4252 36.50 6361.768 ms perf
4256 1.17 205.215 ms bash
151 0.53 93.298 ms systemd-resolve
4254 0.39 69.468 ms perf
423 0.34 59.368 ms bash
412 0.29 51.204 ms sshd
249 0.20 35.288 ms sd-resolve
16 0.17 30.287 ms rcu_preempt
153 0.09 17.266 ms systemd-timesyn
1 0.09 17.078 ms systemd
4253 0.07 12.457 ms perf
4255 0.06 11.559 ms perf
4234 0.03 6.105 ms kworker/u16:1
69 0.03 6.259 ms kworker/1:1H
4251 0.02 4.615 ms perf
4095 0.02 4.890 ms kworker/7:1
61 0.02 4.005 ms kcompactd0
75 0.02 3.546 ms kworker/2:1
97 0.01 3.106 ms kworker/7:1H
98 0.01 1.995 ms jbd2/sda-8
4088 0.01 1.779 ms kworker/u16:3
2909 0.01 1.795 ms kworker/0:2
4246 0.00 1.117 ms kworker/7:2
51 0.00 0.327 ms ksoftirqd/7
50 0.00 0.369 ms migration/7
102 0.00 0.160 ms kworker/6:1H
76 0.00 0.609 ms kworker/6:1
45 0.00 0.779 ms migration/6
87 0.00 0.504 ms kworker/5:1H
73 0.00 1.130 ms kworker/5:1
41 0.00 0.152 ms ksoftirqd/5
40 0.00 0.702 ms migration/5
64 0.00 0.316 ms kworker/4:1
35 0.00 0.791 ms migration/4
353 0.00 2.211 ms sshd
74 0.00 0.272 ms kworker/3:1
30 0.00 0.819 ms migration/3
25 0.00 0.784 ms migration/2
397 0.00 0.539 ms kworker/1:1
21 0.00 1.600 ms ksoftirqd/1
20 0.00 0.773 ms migration/1
17 0.00 1.682 ms migration/0
15 0.00 0.076 ms ksoftirqd/0
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-12-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Some common tools for collecting statistics on CPU usage, such as top,
obtain statistics from timer interrupt sampling, and then periodically
read statistics from /proc/stat.
This method has some deviations:
1. In the tick interrupt, the time between the last tick and the current
tick is counted in the current task. However, the task may be running
only part of the time.
2. For each task, the top tool periodically reads the /proc/{PID}/status
information. For tasks with a short life cycle, it may be missed.
In conclusion, the top tool cannot accurately collect statistics on the
CPU usage and running time of tasks.
The statistical method based on sched_switch tracepoint can accurately
calculate the CPU usage of all tasks. This method is applicable to
scenarios where performance comparison data is of high precision.
Example usage:
# perf kwork
Usage: perf kwork [<options>] {record|report|latency|timehist|top}
-D, --dump-raw-trace dump raw trace in ASCII
-f, --force don't complain, do it
-k, --kwork <kwork> list of kwork to profile (irq, softirq, workqueue, sched, etc)
-v, --verbose be more verbose (show symbol address, etc)
# perf kwork -k sched record -- perf bench sched messaging -g 1 -l 10000
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 1 groups == 40 processes run
Total time: 14.074 [sec]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 15.886 MB perf.data (129472 samples) ]
# perf kwork top
Total : 115708.178 ms, 8 cpus
%Cpu(s): 9.78% id
%Cpu0 [||||||||||||||||||||||||||| 90.55%]
%Cpu1 [||||||||||||||||||||||||||| 90.51%]
%Cpu2 [|||||||||||||||||||||||||| 88.57%]
%Cpu3 [||||||||||||||||||||||||||| 91.18%]
%Cpu4 [||||||||||||||||||||||||||| 91.09%]
%Cpu5 [||||||||||||||||||||||||||| 90.88%]
%Cpu6 [|||||||||||||||||||||||||| 88.64%]
%Cpu7 [||||||||||||||||||||||||||| 90.28%]
PID %CPU RUNTIME COMMMAND
----------------------------------------------------
4113 22.23 3221.547 ms sched-messaging
4105 21.61 3131.495 ms sched-messaging
4119 21.53 3120.937 ms sched-messaging
4103 21.39 3101.614 ms sched-messaging
4106 21.37 3095.209 ms sched-messaging
4104 21.25 3077.269 ms sched-messaging
4115 21.21 3073.188 ms sched-messaging
4109 21.18 3069.022 ms sched-messaging
4111 20.78 3010.033 ms sched-messaging
4114 20.74 3007.073 ms sched-messaging
4108 20.73 3002.137 ms sched-messaging
4107 20.47 2967.292 ms sched-messaging
4117 20.39 2955.335 ms sched-messaging
4112 20.34 2947.080 ms sched-messaging
4118 20.32 2942.519 ms sched-messaging
4121 20.23 2929.865 ms sched-messaging
4110 20.22 2930.078 ms sched-messaging
4122 20.15 2919.542 ms sched-messaging
4120 19.77 2866.032 ms sched-messaging
4116 19.72 2857.660 ms sched-messaging
4127 16.19 2346.334 ms sched-messaging
4142 15.86 2297.600 ms sched-messaging
4141 15.62 2262.646 ms sched-messaging
4136 15.41 2231.408 ms sched-messaging
4130 15.38 2227.008 ms sched-messaging
4129 15.31 2217.692 ms sched-messaging
4126 15.21 2201.711 ms sched-messaging
4139 15.19 2200.722 ms sched-messaging
4137 15.10 2188.633 ms sched-messaging
4134 15.06 2182.082 ms sched-messaging
4132 15.02 2177.530 ms sched-messaging
4131 14.73 2131.973 ms sched-messaging
4125 14.68 2125.439 ms sched-messaging
4128 14.66 2122.255 ms sched-messaging
4123 14.65 2122.113 ms sched-messaging
4135 14.56 2107.144 ms sched-messaging
4133 14.51 2103.549 ms sched-messaging
4124 14.27 2066.671 ms sched-messaging
4140 14.17 2052.251 ms sched-messaging
4138 13.81 2000.361 ms sched-messaging
0 11.42 1652.009 ms swapper/2
0 11.35 1641.694 ms swapper/6
0 9.71 1405.108 ms swapper/7
0 9.48 1372.338 ms swapper/1
0 9.44 1366.013 ms swapper/0
0 9.11 1318.382 ms swapper/5
0 8.90 1287.582 ms swapper/4
0 8.81 1274.356 ms swapper/3
4100 2.61 379.328 ms perf
4101 1.16 169.487 ms perf-exec
151 0.65 94.741 ms systemd-resolve
249 0.36 53.030 ms sd-resolve
153 0.14 21.405 ms systemd-timesyn
1 0.10 16.200 ms systemd
16 0.09 15.785 ms rcu_preempt
4102 0.06 9.727 ms perf
4095 0.03 5.464 ms kworker/7:1
98 0.02 3.231 ms jbd2/sda-8
353 0.02 4.115 ms sshd
75 0.02 3.889 ms kworker/2:1
73 0.01 1.552 ms kworker/5:1
64 0.01 1.591 ms kworker/4:1
74 0.01 1.952 ms kworker/3:1
61 0.01 2.608 ms kcompactd0
397 0.01 1.602 ms kworker/1:1
69 0.01 1.817 ms kworker/1:1H
10 0.01 2.553 ms kworker/u16:0
2909 0.01 2.684 ms kworker/0:2
1211 0.00 0.426 ms kworker/7:0
97 0.00 0.153 ms kworker/7:1H
51 0.00 0.100 ms ksoftirqd/7
120 0.00 0.856 ms systemd-journal
76 0.00 1.414 ms kworker/6:1
46 0.00 0.246 ms ksoftirqd/6
45 0.00 0.164 ms migration/6
41 0.00 0.098 ms ksoftirqd/5
40 0.00 0.207 ms migration/5
86 0.00 1.339 ms kworker/4:1H
36 0.00 0.252 ms ksoftirqd/4
35 0.00 0.090 ms migration/4
31 0.00 0.156 ms ksoftirqd/3
30 0.00 0.073 ms migration/3
26 0.00 0.180 ms ksoftirqd/2
25 0.00 0.085 ms migration/2
21 0.00 0.106 ms ksoftirqd/1
20 0.00 0.118 ms migration/1
302 0.00 1.440 ms systemd-logind
17 0.00 0.132 ms migration/0
15 0.00 0.255 ms ksoftirqd/0
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-10-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add a `struct rb_root_cached *root` parameter to work_sort() to sort the
specified rb tree elements.
No functional change.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-9-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The kwork_class type of sched is added to support recording and parsing of
sched_switch events.
As follows:
# perf kwork -h
Usage: perf kwork [<options>] {record|report|latency|timehist}
-D, --dump-raw-trace dump raw trace in ASCII
-f, --force don't complain, do it
-k, --kwork <kwork> list of kwork to profile (irq, softirq, workqueue, sched, etc)
-v, --verbose be more verbose (show symbol address, etc)
# perf kwork -k sched record true
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.083 MB perf.data (47 samples) ]
# perf evlist
sched:sched_switch
dummy:HG
# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-8-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Currently when no kwork event is specified, all events are configured by
default. Now set to default event list string, which is more flexible and
supports subsequent function extension.
Also put setup_event_list() into each subcommand for different settings.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-7-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
work_push_atom() supports nesting. Currently, all supported kworks are not
nested. A `overwrite` parameter is added to overwrite the original atom in
the list.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-6-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
To support different types of reports, two parameters `struct perf_kwork
* kwork` and `enum kwork_trace_type src_type` are added to work_init()
of struct kwork_class for initialization in different scenarios.
No functional change intended.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-5-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
'perf kwork' processes data based on timestamps and needs to sort events.
Fixes: f98919ec4f ("perf kwork: Implement 'report' subcommand")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20230812084917.169338-4-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1. Atoms are managed in page mode and should be released using atom_free()
instead of free().
2. When the event does not match, the atom needs to free.
Fixes: f98919ec4f ("perf kwork: Implement 'report' subcommand")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20230812084917.169338-2-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Pthread keys are more portable than __thread and allow the association
of a destructor with the key. Use the destructor to clean up TLS
callchain cursors to aid understanding memory leaks.
Committer notes:
Had to fixup a series of unconverted places and also check for the
return of get_tls_callchain_cursor() as it may fail and return NULL.
In that unlikely case we now either print something to a file, if the
caller was expecting to print a callchain, or return an error code to
state that resolving the callchain isn't possible.
In some cases this was made easier because thread__resolve_callchain()
already can fail for other reasons, so this new one (cursor == NULL) can
be added and the callers don't have to explicitely check for this new
condition.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-25-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
struct addr_location holds references to multiple reference counted
objects. Add init/exit functions to make maintenance of those more
consistent with the rest of the code and to try to avoid
leaks. Modification of thread reference counts isn't included in this
change.
Committer notes:
I needed to initialize result to sample->ip to make sure is set to
something, fixing a compile time error, mostly keeping the previous
logic as build_alloc_func_list() already does debugging/error prints
about what went wrong if it takes the 'goto out'.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
'input_name' is the name of the input perf.data file, it is used by data
convert and ui code. Move it to util to make it more consistent with
other global state.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Chengdong Li <chengdongli@tencent.com>
Cc: Denis Nikitin <denik@chromium.org>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Raul Silvera <rsilvera@google.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Remove the LIBTRACEEVENT_DYNAMIC and LIBTRACEFS_DYNAMIC make command
line variables.
If libtraceevent isn't installed or NO_LIBTRACEEVENT=1 is passed to the
build, don't compile in libtraceevent and libtracefs support.
This also disables CONFIG_TRACE that controls "perf trace".
CONFIG_LIBTRACEEVENT is used to control enablement in Build/Makefiles,
HAVE_LIBTRACEEVENT is used in C code.
Without HAVE_LIBTRACEEVENT tracepoints are disabled and as such the
commands kmem, kwork, lock, sched and timechart are removed. The
majority of commands continue to work including "perf test".
Committer notes:
Fixed up a tools/perf/util/Build reject and added:
#include <traceevent/event-parse.h>
to tools/perf/util/scripting-engines/trace-event-perl.c.
Committer testing:
$ rpm -qi libtraceevent-devel
Name : libtraceevent-devel
Version : 1.5.3
Release : 2.fc36
Architecture: x86_64
Install Date: Mon 25 Jul 2022 03:20:19 PM -03
Group : Unspecified
Size : 27728
License : LGPLv2+ and GPLv2+
Signature : RSA/SHA256, Fri 15 Apr 2022 02:11:58 PM -03, Key ID 999f7cbf38ab71f4
Source RPM : libtraceevent-1.5.3-2.fc36.src.rpm
Build Date : Fri 15 Apr 2022 10:57:01 AM -03
Build Host : buildvm-x86-05.iad2.fedoraproject.org
Packager : Fedora Project
Vendor : Fedora Project
URL : https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/
Bug URL : https://bugz.fedoraproject.org/libtraceevent
Summary : Development headers of libtraceevent
Description :
Development headers of libtraceevent-libs
$
Default build:
$ ldd ~/bin/perf | grep tracee
libtraceevent.so.1 => /lib64/libtraceevent.so.1 (0x00007f1dcaf8f000)
$
# perf trace -e sched:* --max-events 10
0.000 migration/0/17 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, dest_cpu: 1)
0.005 migration/0/17 sched:sched_wake_idle_without_ipi(cpu: 1)
0.011 migration/0/17 sched:sched_switch(prev_comm: "", prev_pid: 17 (migration/0), prev_state: 1, next_comm: "", next_prio: 120)
1.173 :0/0 sched:sched_wakeup(comm: "", pid: 3138 (gnome-terminal-), prio: 120)
1.180 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 3138 (gnome-terminal-), next_prio: 120)
0.156 migration/1/21 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, orig_cpu: 1, dest_cpu: 2)
0.160 migration/1/21 sched:sched_wake_idle_without_ipi(cpu: 2)
0.166 migration/1/21 sched:sched_switch(prev_comm: "", prev_pid: 21 (migration/1), prev_state: 1, next_comm: "", next_prio: 120)
1.183 :0/0 sched:sched_wakeup(comm: "", pid: 1602985 (kworker/u16:0-f), prio: 120, target_cpu: 1)
1.186 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 1602985 (kworker/u16:0-f), next_prio: 120)
#
Had to tweak tools/perf/util/setup.py to make sure the python binding
shared object links with libtraceevent if -DHAVE_LIBTRACEEVENT is
present in CFLAGS.
Building with NO_LIBTRACEEVENT=1 uncovered some more build failures:
- Make building of data-convert-bt.c to CONFIG_LIBTRACEEVENT=y
- perf-$(CONFIG_LIBTRACEEVENT) += scripts/
- bpf_kwork.o needs also to be dependent on CONFIG_LIBTRACEEVENT=y
- The python binding needed some fixups and util/trace-event.c can't be
built and linked with the python binding shared object, so remove it
in tools/perf/util/setup.py and exclude it from the list of
dependencies in the python/perf.so Makefile.perf target.
Building without libtraceevent-devel installed uncovered more build
failures:
- The python binding tools/perf/util/python.c was assuming that
traceevent/parse-events.h was always available, which was the case
when we defaulted to using the in-kernel tools/lib/traceevent/ files,
now we need to enclose it under ifdef HAVE_LIBTRACEEVENT, just like
the other parts of it that deal with tracepoints.
- We have to ifdef the rules in the Build files with
CONFIG_LIBTRACEEVENT=y to build builtin-trace.c and
tools/perf/trace/beauty/ as we only ifdef setting CONFIG_TRACE=y when
setting NO_LIBTRACEEVENT=1 in the make command line, not when we don't
detect libtraceevent-devel installed in the system. Simplification here
to avoid these two ways of disabling builtin-trace.c and not having
CONFIG_TRACE=y when libtraceevent-devel isn't installed is the clean
way.
From Athira:
<quote>
tools/perf/arch/powerpc/util/Build
-perf-y += kvm-stat.o
+perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
</quote>
Then, ditto for arm64 and s390, detected by container cross build tests.
- s/390 uses test__checkevent_tracepoint() that is now only available if
HAVE_LIBTRACEEVENT is defined, enclose the callsite with ifder HAVE_LIBTRACEEVENT.
Also from Athira:
<quote>
With this change, I could successfully compile in these environment:
- Without libtraceevent-devel installed
- With libtraceevent-devel installed
- With “make NO_LIBTRACEEVENT=1”
</quote>
Then, finally rename CONFIG_TRACEEVENT to CONFIG_LIBTRACEEVENT for
consistency with other libraries detected in tools/perf/.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20221205225940.3079667-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Use the dedicated non-atomic helpers for {clear,set}_bit() and their
test variants, i.e. the double-underscore versions. Depsite being
defined in atomic.h, and despite the kernel versions being atomic in the
kernel, tools' {clear,set}_bit() helpers aren't actually atomic. Move
to the double-underscore versions so that the versions that are expected
to be atomic (for kernel developers) can be made atomic without
affecting users that don't want atomic operations.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: James Morse <james.morse@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: alexandru elisei <alexandru.elisei@arm.com>
Cc: kvm@vger.kernel.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: kvmarm@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20221119013450.2643007-6-seanjc@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Leave just some forward declarations for pointers, move the includes to
where they are really needed.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
'perf record' generates perf.data, which generates extra interrupts
for hard disk, amount of data to be collected increases with time.
Using eBPF trace can process the data in kernel, which solves the
preceding two problems.
Add -b/--use-bpf option for latency and report to support
tracing kwork events using eBPF:
1. Create bpf prog and attach to tracepoints,
2. Start tracing after command is entered,
3. After user hit "ctrl+c", stop tracing and report,
4. Support CPU and name filtering.
This commit implements the framework code and
does not add specific event support.
Test cases:
# perf kwork rep -h
Usage: perf kwork report [<options>]
-b, --use-bpf Use BPF to measure kwork runtime
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): runtime, max, count
-S, --with-summary Show summary with statistics
--time <str> Time span for analysis (start,stop)
# perf kwork lat -h
Usage: perf kwork latency [<options>]
-b, --use-bpf Use BPF to measure kwork latency
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): avg, max, count
--time <str> Time span for analysis (start,stop)
# perf kwork lat -b
Unsupported bpf trace class irq
# perf kwork rep -b
Unsupported bpf trace class irq
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-15-yangjihong1@huawei.com
[ Simplify work_findnew() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements workqueue latency function.
Test cases:
# perf kwork -k workqueue lat
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(w)vmstat_update | 0001 | 5.004 ms | 1 | 5.004 ms | 44001.745646 s | 44001.750650 s |
(w)vmstat_update | 0006 | 1.773 ms | 1 | 1.773 ms | 44000.830840 s | 44000.832613 s |
(w)vmstat_shepherd | 0000 | 0.992 ms | 8 | 2.474 ms | 44007.717845 s | 44007.720318 s |
(w)vmstat_update | 0000 | 0.974 ms | 5 | 2.624 ms | 44004.785970 s | 44004.788594 s |
(w)e1000_watchdog | 0002 | 0.687 ms | 5 | 2.632 ms | 44005.009334 s | 44005.011966 s |
(w)vmstat_update | 0002 | 0.307 ms | 1 | 0.307 ms | 44004.817395 s | 44004.817702 s |
(w)vmstat_update | 0004 | 0.296 ms | 1 | 0.296 ms | 43997.913677 s | 43997.913973 s |
(w)mix_interrupt_randomness | 0000 | 0.283 ms | 285 | 3.724 ms | 44006.790889 s | 44006.794613 s |
(w)neigh_managed_work | 0001 | 0.271 ms | 1 | 0.271 ms | 43997.665542 s | 43997.665813 s |
(w)vmstat_update | 0005 | 0.261 ms | 1 | 0.261 ms | 44007.820542 s | 44007.820803 s |
(w)neigh_managed_work | 0004 | 0.220 ms | 1 | 0.220 ms | 44002.953287 s | 44002.953507 s |
(w)neigh_periodic_work | 0004 | 0.217 ms | 1 | 0.217 ms | 43999.929718 s | 43999.929935 s |
(w)mix_interrupt_randomness | 0002 | 0.199 ms | 5 | 0.310 ms | 44005.012316 s | 44005.012625 s |
(w)vmstat_update | 0003 | 0.199 ms | 4 | 0.307 ms | 44005.714391 s | 44005.714699 s |
(w)gc_worker | 0001 | 0.071 ms | 173 | 1.128 ms | 44002.062579 s | 44002.063707 s |
--------------------------------------------------------------------------------------------------------------------------------
INFO: 0.020% skipped events (17 including 10 raise, 7 entry, 0 exit)
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-13-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements softirq latency function.
Test cases:
# perf kwork -k softirq lat
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0006 | 1.048 ms | 1 | 1.048 ms | 44000.829759 s | 44000.830807 s |
(s)TIMER:1 | 0001 | 1.008 ms | 4 | 3.434 ms | 43997.662069 s | 43997.665503 s |
(s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s |
(s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s |
(s)RCU:9 | 0005 | 0.245 ms | 88 | 1.866 ms | 43997.683105 s | 43997.684971 s |
(s)SCHED:7 | 0000 | 0.158 ms | 677 | 2.639 ms | 44004.785716 s | 44004.788355 s |
... <SNIP> ...
(s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s |
(s)RCU:9 | 0003 | 0.129 ms | 2193 | 1.507 ms | 44006.010208 s | 44006.011715 s |
(s)TIMER:1 | 0005 | 0.128 ms | 1 | 0.128 ms | 44007.820346 s | 44007.820474 s |
(s)SCHED:7 | 0002 | 0.040 ms | 1731 | 0.211 ms | 44005.009237 s | 44005.009447 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork -k softirq lat -C 1,2
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0001 | 1.008 ms | 4 | 3.434 ms | 43997.662069 s | 43997.665503 s |
(s)RCU:9 | 0001 | 0.216 ms | 1619 | 3.659 ms | 43997.662069 s | 43997.665727 s |
(s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s |
(s)NET_RX:3 | 0002 | 0.106 ms | 5 | 0.163 ms | 44005.012255 s | 44005.012418 s |
(s)TIMER:1 | 0002 | 0.084 ms | 9 | 0.114 ms | 44005.009168 s | 44005.009282 s |
(s)SCHED:7 | 0001 | 0.049 ms | 655 | 0.837 ms | 44005.707998 s | 44005.708835 s |
(s)SCHED:7 | 0002 | 0.040 ms | 1731 | 0.211 ms | 44005.009237 s | 44005.009447 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork -k softirq lat -n RCU
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s |
(s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s |
(s)RCU:9 | 0005 | 0.245 ms | 88 | 1.866 ms | 43997.683105 s | 43997.684971 s |
(s)RCU:9 | 0004 | 0.237 ms | 26 | 0.792 ms | 43997.683018 s | 43997.683810 s |
(s)RCU:9 | 0007 | 0.217 ms | 140 | 1.335 ms | 43997.671080 s | 43997.672415 s |
(s)RCU:9 | 0001 | 0.216 ms | 1619 | 3.659 ms | 43997.662069 s | 43997.665727 s |
(s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s |
(s)RCU:9 | 0003 | 0.129 ms | 2193 | 1.507 ms | 44006.010208 s | 44006.011715 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork -k softirq lat -s count,avg -n RCU
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)RCU:9 | 0003 | 0.129 ms | 2193 | 1.507 ms | 44006.010208 s | 44006.011715 s |
(s)RCU:9 | 0001 | 0.216 ms | 1619 | 3.659 ms | 43997.662069 s | 43997.665727 s |
(s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s |
(s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s |
(s)RCU:9 | 0007 | 0.217 ms | 140 | 1.335 ms | 43997.671080 s | 43997.672415 s |
(s)RCU:9 | 0005 | 0.245 ms | 88 | 1.866 ms | 43997.683105 s | 43997.684971 s |
(s)RCU:9 | 0004 | 0.237 ms | 26 | 0.792 ms | 43997.683018 s | 43997.683810 s |
(s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork -k softirq lat --time 43997,
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0006 | 1.048 ms | 1 | 1.048 ms | 44000.829759 s | 44000.830807 s |
(s)TIMER:1 | 0001 | 1.008 ms | 4 | 3.434 ms | 43997.662069 s | 43997.665503 s |
(s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s |
(s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s |
(s)TIMER:1 | 0004 | 0.083 ms | 21 | 0.127 ms | 44004.969171 s | 44004.969298 s |
... <SNIP> ...
(s)SCHED:7 | 0005 | 0.050 ms | 4 | 0.086 ms | 43997.684852 s | 43997.684938 s |
(s)SCHED:7 | 0001 | 0.049 ms | 655 | 0.837 ms | 44005.707998 s | 44005.708835 s |
(s)SCHED:7 | 0007 | 0.044 ms | 171 | 0.077 ms | 43997.943265 s | 43997.943342 s |
(s)SCHED:7 | 0002 | 0.040 ms | 1731 | 0.211 ms | 44005.009237 s | 44005.009447 s |
--------------------------------------------------------------------------------------------------------------------------------
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-12-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements framework of perf kwork latency, which is used to report time
properties such as delay time and frequency.
Test cases:
# perf kwork lat -h
Usage: perf kwork latency [<options>]
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): avg, max, count
--time <str> Time span for analysis (start,stop)
# perf kwork lat -C 199
Requested CPU 199 too large. Consider raising MAX_NR_CPUS
Invalid cpu bitmap
# perf kwork lat -i perf_no_exist.data
failed to open perf_no_exist.data: No such file or directory
# perf kwork lat -s avg1
Error: Unknown --sort key: `avg1'
Usage: perf kwork latency [<options>]
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): avg, max, count
--time <str> Time span for analysis (start,stop)
# perf kwork lat --time FFFF,
Invalid time span
# perf kwork lat
Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end |
--------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------
INFO: 36.570% skipped events (31537 including 0 raise, 31537 entry, 0 exit)
Since there are no latency-enabled events, the output is empty.
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-11-yangjihong1@huawei.com
[ Add {} for multiline if blocks ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements workqueue report function.
Test cases:
# perf kwork -k workqueue rep
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(w)gc_worker | 0001 | 1912.389 ms | 173 | 12.896 ms | 44002.050787 s | 44002.063683 s |
(w)mix_interrupt_randomness | 0000 | 24.308 ms | 285 | 3.349 ms | 44004.784908 s | 44004.788257 s |
(w)e1000_watchdog | 0002 | 5.332 ms | 5 | 2.059 ms | 44000.914366 s | 44000.916424 s |
(w)vmstat_update | 0005 | 0.989 ms | 2 | 0.953 ms | 43997.986991 s | 43997.987944 s |
(w)vmstat_shepherd | 0000 | 0.964 ms | 8 | 0.195 ms | 43997.986453 s | 43997.986648 s |
(w)vmstat_update | 0003 | 0.306 ms | 6 | 0.077 ms | 44004.689543 s | 44004.689620 s |
(w)vmstat_update | 0000 | 0.196 ms | 5 | 0.049 ms | 44005.713732 s | 44005.713781 s |
(w)vmstat_update | 0001 | 0.162 ms | 2 | 0.130 ms | 44000.192034 s | 44000.192164 s |
(w)mix_interrupt_randomness | 0002 | 0.114 ms | 5 | 0.037 ms | 44005.012625 s | 44005.012662 s |
(w)vmstat_update | 0002 | 0.084 ms | 2 | 0.043 ms | 44004.817702 s | 44004.817745 s |
(w)vmstat_update | 0006 | 0.067 ms | 2 | 0.041 ms | 43997.987214 s | 43997.987254 s |
(w)neigh_periodic_work | 0004 | 0.039 ms | 1 | 0.039 ms | 43999.929935 s | 43999.929974 s |
(w)vmstat_update | 0007 | 0.037 ms | 1 | 0.037 ms | 43997.988969 s | 43997.989006 s |
(w)neigh_managed_work | 0001 | 0.036 ms | 1 | 0.036 ms | 43997.665813 s | 43997.665849 s |
(w)neigh_managed_work | 0004 | 0.036 ms | 1 | 0.036 ms | 44002.953507 s | 44002.953543 s |
(w)vmstat_update | 0004 | 0.027 ms | 1 | 0.027 ms | 43997.913973 s | 43997.914000 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork -k workqueue rep -S
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(w)gc_worker | 0001 | 1912.389 ms | 173 | 12.896 ms | 44002.050787 s | 44002.063683 s |
(w)mix_interrupt_randomness | 0000 | 24.308 ms | 285 | 3.349 ms | 44004.784908 s | 44004.788257 s |
(w)e1000_watchdog | 0002 | 5.332 ms | 5 | 2.059 ms | 44000.914366 s | 44000.916424 s |
(w)vmstat_update | 0005 | 0.989 ms | 2 | 0.953 ms | 43997.986991 s | 43997.987944 s |
(w)vmstat_shepherd | 0000 | 0.964 ms | 8 | 0.195 ms | 43997.986453 s | 43997.986648 s |
(w)vmstat_update | 0003 | 0.306 ms | 6 | 0.077 ms | 44004.689543 s | 44004.689620 s |
(w)vmstat_update | 0000 | 0.196 ms | 5 | 0.049 ms | 44005.713732 s | 44005.713781 s |
(w)vmstat_update | 0001 | 0.162 ms | 2 | 0.130 ms | 44000.192034 s | 44000.192164 s |
(w)mix_interrupt_randomness | 0002 | 0.114 ms | 5 | 0.037 ms | 44005.012625 s | 44005.012662 s |
(w)vmstat_update | 0002 | 0.084 ms | 2 | 0.043 ms | 44004.817702 s | 44004.817745 s |
(w)vmstat_update | 0006 | 0.067 ms | 2 | 0.041 ms | 43997.987214 s | 43997.987254 s |
(w)neigh_periodic_work | 0004 | 0.039 ms | 1 | 0.039 ms | 43999.929935 s | 43999.929974 s |
(w)vmstat_update | 0007 | 0.037 ms | 1 | 0.037 ms | 43997.988969 s | 43997.989006 s |
(w)neigh_managed_work | 0001 | 0.036 ms | 1 | 0.036 ms | 43997.665813 s | 43997.665849 s |
(w)neigh_managed_work | 0004 | 0.036 ms | 1 | 0.036 ms | 44002.953507 s | 44002.953543 s |
(w)vmstat_update | 0004 | 0.027 ms | 1 | 0.027 ms | 43997.913973 s | 43997.914000 s |
--------------------------------------------------------------------------------------------------------------------------------
Total count : 500
Total runtime (msec) : 1945.085 (0.192% load average)
Total time span (msec) : 10155.026
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork -k workqueue rep -n vmstat_update
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(w)vmstat_update | 0005 | 0.989 ms | 2 | 0.953 ms | 43997.986991 s | 43997.987944 s |
(w)vmstat_update | 0003 | 0.306 ms | 6 | 0.077 ms | 44004.689543 s | 44004.689620 s |
(w)vmstat_update | 0000 | 0.196 ms | 5 | 0.049 ms | 44005.713732 s | 44005.713781 s |
(w)vmstat_update | 0001 | 0.162 ms | 2 | 0.130 ms | 44000.192034 s | 44000.192164 s |
(w)vmstat_update | 0002 | 0.084 ms | 2 | 0.043 ms | 44004.817702 s | 44004.817745 s |
(w)vmstat_update | 0006 | 0.067 ms | 2 | 0.041 ms | 43997.987214 s | 43997.987254 s |
(w)vmstat_update | 0007 | 0.037 ms | 1 | 0.037 ms | 43997.988969 s | 43997.989006 s |
(w)vmstat_update | 0004 | 0.027 ms | 1 | 0.027 ms | 43997.913973 s | 43997.914000 s |
--------------------------------------------------------------------------------------------------------------------------------
Committer testing:
# perf kwork -k workqueue rep -C 1 | head -20
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(w)commit_work | 0001 | 25.896 ms | 2 | 13.200 ms | 26522.906700 s | 26522.919900 s |
(w)commit_work | 0001 | 13.316 ms | 1 | 13.316 ms | 26522.573246 s | 26522.586562 s |
(w)commit_work | 0001 | 13.177 ms | 1 | 13.177 ms | 26522.673406 s | 26522.686583 s |
(w)commit_work | 0001 | 12.630 ms | 1 | 12.630 ms | 26522.123921 s | 26522.136551 s |
(w)btrfs_work_helper | 0001 | 3.544 ms | 1 | 3.544 ms | 26529.131296 s | 26529.134840 s |
(w)btrfs_work_helper | 0001 | 3.330 ms | 1 | 3.330 ms | 26529.137698 s | 26529.141028 s |
(w)btrfs_work_helper | 0001 | 2.855 ms | 1 | 2.855 ms | 26529.134842 s | 26529.137697 s |
(w)btrfs_work_helper | 0001 | 2.757 ms | 1 | 2.757 ms | 26529.124086 s | 26529.126843 s |
(w)btrfs_work_helper | 0001 | 2.182 ms | 1 | 2.182 ms | 26529.141030 s | 26529.143212 s |
(w)btrfs_work_helper | 0001 | 1.743 ms | 1 | 1.743 ms | 26520.415335 s | 26520.417078 s |
(w)btrfs_work_helper | 0001 | 1.499 ms | 1 | 1.499 ms | 26529.127774 s | 26529.129272 s |
(w)btrfs_work_helper | 0001 | 1.446 ms | 1 | 1.446 ms | 26529.129848 s | 26529.131294 s |
(w)btrfs_work_helper | 0001 | 1.373 ms | 1 | 1.373 ms | 26523.808270 s | 26523.809643 s |
(w)wb_workfn | 0001 | 1.165 ms | 2 | 0.763 ms | 26527.071056 s | 26527.071819 s |
(w)btrfs_work_helper | 0001 | 0.926 ms | 1 | 0.926 ms | 26529.126846 s | 26529.127771 s |
(w)btrfs_work_helper | 0001 | 0.571 ms | 1 | 0.571 ms | 26529.129275 s | 26529.129846 s |
(w)wb_workfn | 0001 | 0.525 ms | 1 | 0.525 ms | 26522.975151 s | 26522.975676 s |
#
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-10-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements softirq kwork report function.
Test cases:
# perf kwork -k softirq rep
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s |
(s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s |
(s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s |
(s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s |
... <SNIP> ...
(s)RCU:9 | 0004 | 0.830 ms | 26 | 0.058 ms | 43997.666418 s | 43997.666476 s |
(s)TIMER:1 | 0001 | 0.471 ms | 4 | 0.158 ms | 44007.834694 s | 44007.834852 s |
(s)RCU:9 | 0006 | 0.220 ms | 7 | 0.048 ms | 44004.833764 s | 44004.833812 s |
(s)NET_RX:3 | 0002 | 0.164 ms | 5 | 0.049 ms | 44005.012418 s | 44005.012466 s |
(s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s |
(s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s |
(s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s |
--------------------------------------------------------------------------------------------------------------------------------
#
# perf kwork -k softirq rep -S
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s |
(s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s |
(s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s |
(s)SCHED:7 | 0000 | 63.631 ms | 680 | 2.690 ms | 44006.721976 s | 44006.724666 s |
... <SNIP> ...
(s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s |
(s)RCU:9 | 0006 | 0.220 ms | 7 | 0.048 ms | 44004.833764 s | 44004.833812 s |
(s)NET_RX:3 | 0002 | 0.164 ms | 5 | 0.049 ms | 44005.012418 s | 44005.012466 s |
(s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s |
(s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s |
(s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s |
--------------------------------------------------------------------------------------------------------------------------------
Total count : 12748
Total runtime (msec) : 661.433 (0.065% load average)
Total time span (msec) : 10176.441
--------------------------------------------------------------------------------------------------------------------------------
#
# perf kwork -k softirq rep -s count,max
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s |
(s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s |
(s)SCHED:7 | 0002 | 50.039 ms | 1731 | 0.074 ms | 44005.009447 s | 44005.009521 s |
(s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s |
(s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s |
... <SNIP> ...
(s)RCU:9 | 0002 | 35.241 ms | 932 | 0.407 ms | 44005.009541 s | 44005.009949 s |
(s)RCU:9 | 0000 | 45.710 ms | 702 | 1.144 ms | 44004.787023 s | 44004.788167 s |
(s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s |
(s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s |
(s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s |
--------------------------------------------------------------------------------------------------------------------------------
Committer testing:
# perf kwork -k softirq report -C 2 -s count,max
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)SCHED:7 | 0002 | 0.980 ms | 159 | 0.024 ms | 26035.571037 s | 26035.571061 s |
(s)RCU:9 | 0002 | 0.124 ms | 88 | 0.021 ms | 26035.177050 s | 26035.177071 s |
(s)TIMER:1 | 0002 | 0.122 ms | 56 | 0.007 ms | 26035.468045 s | 26035.468052 s |
--------------------------------------------------------------------------------------------------------------------------------
#
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-9-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements irq kwork report function.
Test cases:
# perf kwork record -- sleep 10
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 6.134 MB perf.data ]
# perf kwork report
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 1167.501 ms | 18284 | 1.096 ms | 44004.464905 s | 44004.466001 s |
eth0:10 | 0002 | 0.185 ms | 5 | 0.058 ms | 44005.012222 s | 44005.012280 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -C 2
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
eth0:10 | 0002 | 0.185 ms | 5 | 0.058 ms | 44005.012222 s | 44005.012280 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -C 3
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -i perf.data
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 1167.501 ms | 18284 | 1.096 ms | 44004.464905 s | 44004.466001 s |
eth0:10 | 0002 | 0.185 ms | 5 | 0.058 ms | 44005.012222 s | 44005.012280 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -s max,freq
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 1167.501 ms | 18284 | 1.096 ms | 44004.464905 s | 44004.466001 s |
eth0:10 | 0002 | 0.185 ms | 5 | 0.058 ms | 44005.012222 s | 44005.012280 s |
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -S
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 1167.501 ms | 18284 | 1.096 ms | 44004.464905 s | 44004.466001 s |
eth0:10 | 0002 | 0.185 ms | 5 | 0.058 ms | 44005.012222 s | 44005.012280 s |
--------------------------------------------------------------------------------------------------------------------------------
Total count : 18289
Total runtime (msec) : 1167.686 (0.115% load average)
Total time span (msec) : 10159.155
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report --time 44005,
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
virtio0-requests:25 | 0000 | 402.173 ms | 4695 | 0.981 ms | 44007.831992 s | 44007.832973 s |
eth0:10 | 0002 | 0.089 ms | 2 | 0.058 ms | 44005.012222 s | 44005.012280 s |
--------------------------------------------------------------------------------------------------------------------------------
Committer testing:
# perf kwork report
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
nvme0q5:130 | 0004 | 1.101 ms | 49 | 0.051 ms | 26035.056403 s | 26035.056455 s |
amdgpu:162 | 0002 | 0.176 ms | 9 | 0.046 ms | 26035.268020 s | 26035.268066 s |
nvme0q24:149 | 0023 | 0.161 ms | 55 | 0.009 ms | 26035.655280 s | 26035.655288 s |
nvme0q20:145 | 0019 | 0.090 ms | 33 | 0.014 ms | 26035.939018 s | 26035.939032 s |
nvme0q31:156 | 0030 | 0.075 ms | 21 | 0.010 ms | 26035.052237 s | 26035.052247 s |
nvme0q8:133 | 0007 | 0.062 ms | 12 | 0.021 ms | 26035.416840 s | 26035.416861 s |
nvme0q6:131 | 0005 | 0.054 ms | 22 | 0.010 ms | 26035.199919 s | 26035.199929 s |
nvme0q19:144 | 0018 | 0.052 ms | 14 | 0.010 ms | 26035.110615 s | 26035.110625 s |
nvme0q7:132 | 0006 | 0.049 ms | 13 | 0.007 ms | 26035.125180 s | 26035.125187 s |
nvme0q18:143 | 0017 | 0.033 ms | 14 | 0.007 ms | 26035.169698 s | 26035.169705 s |
nvme0q17:142 | 0016 | 0.013 ms | 1 | 0.013 ms | 26035.565147 s | 26035.565160 s |
enp5s0-rx-0:164 | 0006 | 0.004 ms | 4 | 0.002 ms | 26035.928882 s | 26035.928884 s |
enp5s0-tx-0:166 | 0008 | 0.003 ms | 3 | 0.002 ms | 26035.870923 s | 26035.870925 s |
--------------------------------------------------------------------------------------------------------------------------------
#
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-8-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Implements framework of 'perf kwork report', which is used to report
time properties such as run time and frequency:
Test cases:
# perf kwork
Usage: perf kwork [<options>] {record|report}
-D, --dump-raw-trace dump raw trace in ASCII
-f, --force don't complain, do it
-k, --kwork <kwork> list of kwork to profile (irq, softirq, workqueue, etc)
-v, --verbose be more verbose (show symbol address, etc)
# perf kwork report -h
Usage: perf kwork report [<options>]
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): runtime, max, count
-S, --with-summary Show summary with statistics
--time <str> Time span for analysis (start,stop)
# perf kwork report
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -S
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------
Total count : 0
Total runtime (msec) : 0.000 (0.000% load average)
Total time span (msec) : 0.000
--------------------------------------------------------------------------------------------------------------------------------
# perf kwork report -C 0,100
Requested CPU 100 too large. Consider raising MAX_NR_CPUS
Invalid cpu bitmap
# perf kwork report -s runtime1
Error: Unknown --sort key: `runtime1'
Usage: perf kwork report [<options>]
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): runtime, max, count
-S, --with-summary Show summary with statistics
--time <str> Time span for analysis (start,stop)
# perf kwork report -i perf_no_exist.data
failed to open perf_no_exist.data: No such file or directory
# perf kwork report --time 00FFF,
Invalid time span
Since there are no report supported events, the output is empty.
Briefly describe the data structure:
1. "class" indicates event type. For example, irq and softiq correspond
to different types.
2. "cluster" refers to a specific event corresponding to a type. For
example, RCU and TIMER in softirq correspond to different clusters,
which contains three types of events: raise, entry, and exit.
3. "atom" includes time of each sample and sample of the previous phase.
(For example, exit corresponds to entry, which is used for timehist.)
Committer notes:
- Add {} for multiline if blocks.
- report_print_work() should either return that ret variable that
accounts how many bytes were printed or stop accounting and be void.
Do the former for now to avoid this:
builtin-kwork.c:534:6: error: variable 'ret' set but not used [-Werror,-Wunused-but-set-variable]
int ret = 0;
^
1 error generated.
When building with:
⬢[acme@toolbox perf]$ clang --version
clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)
Also:
- if ((dst_type >= 0) && (dst_type < KWORK_TRACE_MAX)) {
+ if (dst_type < KWORK_TRACE_MAX) {
Several versions of clang and at least this gcc:
3 51.40 alpine:3.9 : FAIL gcc version 8.3.0 (Alpine 8.3.0)
builtin-kwork.c:411:16: error: comparison of unsigned enum expression >= 0 is
always true [-Werror,-Wtautological-compare]
if ((dst_type >= 0) && (dst_type < KWORK_TRACE_MAX)) {
As the first entry in a enum is zero.
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-7-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Record interrupt events irq:irq_handler_entry & irq_handler_exit
Test cases:
# perf kwork record -o perf_kwork.date -- sleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 0.556 MB perf_kwork.date ]
#
# perf evlist -i perf_kwork.date
irq:irq_handler_entry
irq:irq_handler_exit
dummy:HG
# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events
#
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-3-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The 'perf kwork' tool is used to trace time properties of kernel work
(such as irq, softirq, and workqueue), including runtime, latency, and
timehist, using the infrastructure in the perf tools to allow tracing
extra targets.
This is the first commit to reuse the 'perf record' framework code to
implement a simple record function, kwork is not supported currently.
Test cases:
# perf
usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]
The most commonly used perf commands are:
<SNIP>
iostat Show I/O performance metrics
kallsyms Searches running kernel for symbols
kmem Tool to trace/measure kernel memory properties
kvm Tool to trace/measure kvm guest os
kwork Tool to trace/measure kernel work properties (latencies)
list List all symbolic event types
lock Analyze lock events
mem Profile memory accesses
record Run a command and record its profile into perf.data
<SNIP>
See 'perf help COMMAND' for more information on a specific command.
# perf kwork
Usage: perf kwork [<options>] {record}
-D, --dump-raw-trace dump raw trace in ASCII
-f, --force don't complain, do it
-k, --kwork <kwork> list of kwork to profile
-v, --verbose be more verbose (show symbol address, etc)
# perf kwork record -- sleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 1.787 MB perf.data ]
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-2-yangjihong1@huawei.com
[ Add {} for multiline if blocks ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Colin Ian King