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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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ab24487aaa
Now the evlist is reference counted, add reference count checking so that gets and puts are paired and easy to debug. Reference count checking is documented here: https://perfwiki.github.io/main/reference-count-checking/ This large patch is adding accessors to evlist functions and switching to their use. There was some minor renaming as evlist__mmap is now an accessor to the mmap variable, and the original evlist__mmap is renamed to evlist__do_mmap. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alice Rogers <alice.mei.rogers@gmail.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Refactored from builtin-top.c, see that files for further copyright notes.
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*/
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#include "event.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "parse-events.h"
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#include "symbol.h"
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#include "top.h"
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#include "util.h"
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#include <inttypes.h>
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#define SNPRINTF(buf, size, fmt, args...) \
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({ \
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size_t r = snprintf(buf, size, fmt, ## args); \
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r > size ? size : r; \
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})
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size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
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{
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float samples_per_sec;
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float ksamples_per_sec;
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float esamples_percent;
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struct record_opts *opts = &top->record_opts;
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struct target *target = &opts->target;
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size_t ret = 0;
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int nr_cpus;
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if (top->samples) {
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samples_per_sec = top->samples / top->delay_secs;
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ksamples_per_sec = top->kernel_samples / top->delay_secs;
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esamples_percent = (100.0 * top->exact_samples) / top->samples;
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} else {
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samples_per_sec = ksamples_per_sec = esamples_percent = 0.0;
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}
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if (!perf_guest) {
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float ksamples_percent = 0.0;
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if (samples_per_sec)
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ksamples_percent = (100.0 * ksamples_per_sec) /
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samples_per_sec;
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ret = SNPRINTF(bf, size,
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" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
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" exact: %4.1f%% lost: %" PRIu64 "/%" PRIu64 " drop: %" PRIu64 "/%" PRIu64 " [",
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samples_per_sec, ksamples_percent, esamples_percent,
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top->lost, top->lost_total, top->drop, top->drop_total);
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} else {
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float us_samples_per_sec = top->us_samples / top->delay_secs;
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float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
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float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
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ret = SNPRINTF(bf, size,
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" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
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" guest kernel:%4.1f%% guest us:%4.1f%%"
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" exact: %4.1f%% [", samples_per_sec,
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100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec -
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guest_kernel_samples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec -
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guest_us_samples_per_sec) /
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samples_per_sec)),
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esamples_percent);
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}
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if (evlist__nr_entries(top->evlist) == 1) {
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struct evsel *first = evlist__first(top->evlist);
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ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
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(uint64_t)first->core.attr.sample_period,
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opts->freq ? "Hz" : "");
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}
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ret += SNPRINTF(bf + ret, size - ret, "%s", evsel__name(top->sym_evsel));
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ret += SNPRINTF(bf + ret, size - ret, "], ");
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if (target->pid)
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ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
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target->pid);
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else if (target->tid)
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ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
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target->tid);
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else if (top->uid_str != NULL)
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ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
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top->uid_str);
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else
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ret += SNPRINTF(bf + ret, size - ret, " (all");
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nr_cpus = perf_cpu_map__nr(evlist__core(top->evlist)->user_requested_cpus);
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if (target->cpu_list)
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ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
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nr_cpus > 1 ? "s" : "",
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target->cpu_list);
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else {
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if (target->tid)
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ret += SNPRINTF(bf + ret, size - ret, ")");
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else
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ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
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nr_cpus, nr_cpus > 1 ? "s" : "");
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}
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perf_top__reset_sample_counters(top);
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return ret;
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}
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void perf_top__reset_sample_counters(struct perf_top *top)
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{
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top->samples = top->us_samples = top->kernel_samples =
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top->exact_samples = top->guest_kernel_samples =
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top->guest_us_samples = top->lost = top->drop = 0;
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}
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