perf trace: Add option to analyze events in a file versus live

Allows capture of raw_syscall:* events and analyzed at a later time.

v2: change -i option from inherit to input name for consistency with
    other perf commands

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1377750593-48046-3-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2013-08-28 22:29:52 -06:00 committed by Arnaldo Carvalho de Melo
parent a2f2804a71
commit 6810fc915f
2 changed files with 100 additions and 2 deletions

View file

@ -74,6 +74,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--sched:
Accrue thread runtime and provide a summary at the end of the session.
-i
--input
Process events from a given perf data file.
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]

View file

@ -4,6 +4,7 @@
#include "util/debug.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/session.h"
#include "util/thread.h"
#include "util/parse-options.h"
#include "util/strlist.h"
@ -652,6 +653,36 @@ static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evs
return 0;
}
static int trace__process_sample(struct perf_tool *tool,
union perf_event *event __maybe_unused,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine __maybe_unused)
{
struct trace *trace = container_of(tool, struct trace, tool);
int err = 0;
tracepoint_handler handler = evsel->handler.func;
if (trace->base_time == 0)
trace->base_time = sample->time;
if (handler)
handler(trace, evsel, sample);
return err;
}
static bool
perf_session__has_tp(struct perf_session *session, const char *name)
{
struct perf_evsel *evsel;
evsel = perf_evlist__find_tracepoint_by_name(session->evlist, name);
return evsel != NULL;
}
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = perf_evlist__new();
@ -791,6 +822,65 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
return err;
}
static int trace__replay(struct trace *trace)
{
const struct perf_evsel_str_handler handlers[] = {
{ "raw_syscalls:sys_enter", trace__sys_enter, },
{ "raw_syscalls:sys_exit", trace__sys_exit, },
};
struct perf_session *session;
int err = -1;
trace->tool.sample = trace__process_sample;
trace->tool.mmap = perf_event__process_mmap;
trace->tool.comm = perf_event__process_comm;
trace->tool.exit = perf_event__process_exit;
trace->tool.fork = perf_event__process_fork;
trace->tool.attr = perf_event__process_attr;
trace->tool.tracing_data = perf_event__process_tracing_data;
trace->tool.build_id = perf_event__process_build_id;
trace->tool.ordered_samples = true;
trace->tool.ordering_requires_timestamps = true;
/* add tid to output */
trace->multiple_threads = true;
if (symbol__init() < 0)
return -1;
session = perf_session__new(input_name, O_RDONLY, 0, false,
&trace->tool);
if (session == NULL)
return -ENOMEM;
err = perf_session__set_tracepoints_handlers(session, handlers);
if (err)
goto out;
if (!perf_session__has_tp(session, "raw_syscalls:sys_enter")) {
pr_err("Data file does not have raw_syscalls:sys_enter events\n");
goto out;
}
if (!perf_session__has_tp(session, "raw_syscalls:sys_exit")) {
pr_err("Data file does not have raw_syscalls:sys_exit events\n");
goto out;
}
setup_pager();
err = perf_session__process_events(session, &trace->tool);
if (err)
pr_err("Failed to process events, error %d", err);
out:
perf_session__delete(session);
return err;
}
static size_t trace__fprintf_threads_header(FILE *fp)
{
size_t printed;
@ -892,6 +982,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
"list of events to trace"),
OPT_STRING('o', "output", &output_name, "file", "output file name"),
OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
"trace events on existing process id"),
OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
@ -900,7 +991,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
"system-wide collection from all CPUs"),
OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
"list of cpus to monitor"),
OPT_BOOLEAN('i', "no-inherit", &trace.opts.no_inherit,
OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
"child tasks do not inherit counters"),
OPT_UINTEGER('m', "mmap-pages", &trace.opts.mmap_pages,
"number of mmap data pages"),
@ -958,7 +1049,10 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
if (!argc && perf_target__none(&trace.opts.target))
trace.opts.target.system_wide = true;
err = trace__run(&trace, argc, argv);
if (input_name)
err = trace__replay(&trace);
else
err = trace__run(&trace, argc, argv);
if (trace.sched && !err)
trace__fprintf_thread_summary(&trace, trace.output);