b52956c961
Allow a user to collect events for multiple threads or processes using a comma separated list. e.g., collect data on a VM and its vhost thread: perf top -p 21483,21485 perf stat -p 21483,21485 -ddd perf record -p 21483,21485 or monitoring vcpu threads perf top -t 21488,21489 perf stat -t 21488,21489 -ddd perf record -t 21488,21489 Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1328718772-16688-1-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
*
|
|
* Refactored from builtin-top.c, see that files for further copyright notes.
|
|
*
|
|
* Released under the GPL v2. (and only v2, not any later version)
|
|
*/
|
|
|
|
#include "cpumap.h"
|
|
#include "event.h"
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "parse-events.h"
|
|
#include "symbol.h"
|
|
#include "top.h"
|
|
#include <inttypes.h>
|
|
|
|
#define SNPRINTF(buf, size, fmt, args...) \
|
|
({ \
|
|
size_t r = snprintf(buf, size, fmt, ## args); \
|
|
r > size ? size : r; \
|
|
})
|
|
|
|
size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
|
|
{
|
|
float samples_per_sec = top->samples / top->delay_secs;
|
|
float ksamples_per_sec = top->kernel_samples / top->delay_secs;
|
|
float esamples_percent = (100.0 * top->exact_samples) / top->samples;
|
|
size_t ret = 0;
|
|
|
|
if (!perf_guest) {
|
|
ret = SNPRINTF(bf, size,
|
|
" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
|
|
" exact: %4.1f%% [", samples_per_sec,
|
|
100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
|
|
samples_per_sec)),
|
|
esamples_percent);
|
|
} else {
|
|
float us_samples_per_sec = top->us_samples / top->delay_secs;
|
|
float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
|
|
float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
|
|
|
|
ret = SNPRINTF(bf, size,
|
|
" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
|
|
" guest kernel:%4.1f%% guest us:%4.1f%%"
|
|
" exact: %4.1f%% [", samples_per_sec,
|
|
100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
|
|
samples_per_sec)),
|
|
100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
|
|
samples_per_sec)),
|
|
100.0 - (100.0 * ((samples_per_sec -
|
|
guest_kernel_samples_per_sec) /
|
|
samples_per_sec)),
|
|
100.0 - (100.0 * ((samples_per_sec -
|
|
guest_us_samples_per_sec) /
|
|
samples_per_sec)),
|
|
esamples_percent);
|
|
}
|
|
|
|
if (top->evlist->nr_entries == 1) {
|
|
struct perf_evsel *first;
|
|
first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
|
|
ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
|
|
(uint64_t)first->attr.sample_period,
|
|
top->freq ? "Hz" : "");
|
|
}
|
|
|
|
ret += SNPRINTF(bf + ret, size - ret, "%s", event_name(top->sym_evsel));
|
|
|
|
ret += SNPRINTF(bf + ret, size - ret, "], ");
|
|
|
|
if (top->target_pid)
|
|
ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
|
|
top->target_pid);
|
|
else if (top->target_tid)
|
|
ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
|
|
top->target_tid);
|
|
else if (top->uid_str != NULL)
|
|
ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
|
|
top->uid_str);
|
|
else
|
|
ret += SNPRINTF(bf + ret, size - ret, " (all");
|
|
|
|
if (top->cpu_list)
|
|
ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
|
|
top->evlist->cpus->nr > 1 ? "s" : "", top->cpu_list);
|
|
else {
|
|
if (top->target_tid)
|
|
ret += SNPRINTF(bf + ret, size - ret, ")");
|
|
else
|
|
ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
|
|
top->evlist->cpus->nr,
|
|
top->evlist->cpus->nr > 1 ? "s" : "");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void perf_top__reset_sample_counters(struct perf_top *top)
|
|
{
|
|
top->samples = top->us_samples = top->kernel_samples =
|
|
top->exact_samples = top->guest_kernel_samples =
|
|
top->guest_us_samples = 0;
|
|
}
|