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perf mem: Add --ldlat option
Adding --ldlat option to specify desired latency for loads event. Specify 50 as loads event latency: $ perf mem record -e ldlat-loads -v --ldlat 50 true calling: record -W -d -e cpu/mem-loads,ldlat=50/P true Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1465928361-2442-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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4 changed files with 21 additions and 1 deletions
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@ -56,6 +56,9 @@ OPTIONS
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--all-user::
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Configure all used events to run in user space.
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--ldload::
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Specify desired latency for loads event.
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-report[1]
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@ -67,6 +67,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
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OPT_CALLBACK('e', "event", &mem, "event",
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"event selector. use 'perf mem record -e list' to list available events",
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parse_record_events),
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OPT_UINTEGER(0, "ldlat", &perf_mem_events__loads_ldlat, "mem-loads latency"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show counter open errors, etc)"),
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OPT_BOOLEAN('U', "--all-user", &all_user, "collect only user level data"),
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@ -10,18 +10,33 @@
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#include "debug.h"
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#include "symbol.h"
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unsigned int perf_mem_events__loads_ldlat = 30;
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#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
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struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
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E("ldlat-loads", "cpu/mem-loads,ldlat=30/P", "mem-loads"),
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E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "mem-loads"),
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E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"),
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};
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#undef E
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#undef E
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static char mem_loads_name[100];
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static bool mem_loads_name__init;
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char *perf_mem_events__name(int i)
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{
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if (i == PERF_MEM_EVENTS__LOAD) {
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if (!mem_loads_name__init) {
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mem_loads_name__init = true;
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scnprintf(mem_loads_name, sizeof(mem_loads_name),
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perf_mem_events[i].name,
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perf_mem_events__loads_ldlat);
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}
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return mem_loads_name;
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}
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return (char *)perf_mem_events[i].name;
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}
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@ -18,6 +18,7 @@ enum {
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};
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extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX];
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extern unsigned int perf_mem_events__loads_ldlat;
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int perf_mem_events__parse(const char *str);
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int perf_mem_events__init(void);
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