Commit a91f4c47 authored by David Ahern's avatar David Ahern Committed by Arnaldo Carvalho de Melo

perf script: Add option to specify time window of interest

Add option to allow user to control analysis window. e.g., collect data
for some amount of time and analyze a segment of interest within that
window.

Committer notes:

Testing it:

  # perf evlist -v
  cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1
  #
  # perf script --hide-call-graph | head -15
    swapper    0 [0] 9693.370039:      1 cycles:ppp: ffffffffb90072ad x86_pmu_enable (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370044:      1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370046:      7 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370048:    126 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370049:   2701 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370051:  58823 cycles:ppp: ffffffffb90cd2e0 idle_cpu (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370059:      1 cycles:ppp: ffffffffb91a713a ctx_resched (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370062:      1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370064:     13 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370065:    250 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370067:   5269 cycles:ppp: ffffffffb902fe79 sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370069: 114602 cycles:ppp: ffffffffb90c1c5a atomic_notifier_call_chain (.../4.8.8-300.fc25.x86_64/vmlinux)
       perf 5124 [2] 9693.370076:      1 cycles:ppp: ffffffffb91a76c1 __perf_event_enable (.../4.8.8-300.fc25.x86_64/vmlinux)
       perf 5124 [2] 9693.370091:      1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
       perf 5124 [2] 9693.370095:      3 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
  #
  # perf script --hide-call-graph --time ,9693.370048
    swapper    0 [0] 9693.370039:      1 cycles:ppp: ffffffffb90072ad x86_pmu_enable (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370044:      1 cycles:ppp: ffffffffb900ca1b intel_pmu_handle_irq (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [0] 9693.370046:      7 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
  # perf script --hide-call-graph --time 9693.370064,9693.370076
    swapper    0 [1] 9693.370064:     13 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370065:    250 cycles:ppp: ffffffffb902fd93 native_sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370067:   5269 cycles:ppp: ffffffffb902fe79 sched_clock (.../4.8.8-300.fc25.x86_64/vmlinux)
    swapper    0 [1] 9693.370069: 114602 cycles:ppp: ffffffffb90c1c5a atomic_notifier_call_chain (.../4.8.8-300.fc25.x86_64/vmlinux)
  #
Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-4-git-send-email-dsahern@gmail.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c284d669
...@@ -292,6 +292,13 @@ include::itrace.txt[] ...@@ -292,6 +292,13 @@ include::itrace.txt[]
--force:: --force::
Don't do ownership validation. Don't do ownership validation.
--time::
Only analyze samples within given time window: <start>,<stop>. Times
have the format seconds.microseconds. If start is not given (i.e., time
string is ',x.y') then analysis starts at the beginning of the file. If
stop time is not given (i.e, time string is 'x.y,') then analysis goes
to end of file.
SEE ALSO SEE ALSO
-------- --------
linkperf:perf-record[1], linkperf:perf-script-perl[1], linkperf:perf-record[1], linkperf:perf-script-perl[1],
......
...@@ -22,6 +22,7 @@ ...@@ -22,6 +22,7 @@
#include "util/thread_map.h" #include "util/thread_map.h"
#include "util/stat.h" #include "util/stat.h"
#include "util/thread-stack.h" #include "util/thread-stack.h"
#include "util/time-utils.h"
#include <linux/bitmap.h> #include <linux/bitmap.h>
#include <linux/stringify.h> #include <linux/stringify.h>
#include <linux/time64.h> #include <linux/time64.h>
...@@ -833,6 +834,8 @@ struct perf_script { ...@@ -833,6 +834,8 @@ struct perf_script {
struct cpu_map *cpus; struct cpu_map *cpus;
struct thread_map *threads; struct thread_map *threads;
int name_width; int name_width;
const char *time_str;
struct perf_time_interval ptime;
}; };
static int perf_evlist__max_name_len(struct perf_evlist *evlist) static int perf_evlist__max_name_len(struct perf_evlist *evlist)
...@@ -1014,6 +1017,9 @@ static int process_sample_event(struct perf_tool *tool, ...@@ -1014,6 +1017,9 @@ static int process_sample_event(struct perf_tool *tool,
struct perf_script *scr = container_of(tool, struct perf_script, tool); struct perf_script *scr = container_of(tool, struct perf_script, tool);
struct addr_location al; struct addr_location al;
if (perf_time__skip_sample(&scr->ptime, sample->time))
return 0;
if (debug_mode) { if (debug_mode) {
if (sample->time < last_timestamp) { if (sample->time < last_timestamp) {
pr_err("Samples misordered, previous: %" PRIu64 pr_err("Samples misordered, previous: %" PRIu64
...@@ -2186,7 +2192,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) ...@@ -2186,7 +2192,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"Enable symbol demangling"), "Enable symbol demangling"),
OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
"Enable kernel symbol demangling"), "Enable kernel symbol demangling"),
OPT_STRING(0, "time", &script.time_str, "str",
"Time span of interest (start,stop)"),
OPT_END() OPT_END()
}; };
const char * const script_subcommands[] = { "record", "report", NULL }; const char * const script_subcommands[] = { "record", "report", NULL };
...@@ -2465,6 +2472,12 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) ...@@ -2465,6 +2472,12 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
if (err < 0) if (err < 0)
goto out_delete; goto out_delete;
/* needs to be parsed after looking up reference time */
if (perf_time__parse_str(&script.ptime, script.time_str) != 0) {
pr_err("Invalid time string\n");
return -EINVAL;
}
err = __cmd_script(&script); err = __cmd_script(&script);
flush_scripting(); flush_scripting();
......
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