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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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perf annotate: Support to display the IPC/Cycle in TUI mode
Unlike the perf report interactive annotate mode, the perf annotate
doesn't display the IPC/Cycle even if branch info is recorded in perf
data file.
perf record -b ...
perf annotate function
It should show IPC/cycle, but it doesn't.
This patch lets perf annotate support the displaying of IPC/Cycle if
branch info is in perf data.
For example,
perf annotate compute_flag
Percent│ IPC Cycle
│
│
│ Disassembly of section .text:
│
│ 0000000000400640 <compute_flag>:
│ compute_flag():
│ volatile int count;
│ static unsigned int s_randseed;
│
│ __attribute__((noinline))
│ int compute_flag()
│ {
22.96 │1.18 584 sub $0x8,%rsp
│ int i;
│
│ i = rand() % 2;
23.02 │1.18 1 → callq rand@plt
│
│ return i;
27.05 │3.37 mov %eax,%edx
│ }
│3.37 add $0x8,%rsp
│ {
│ int i;
│
│ i = rand() % 2;
│
│ return i;
│3.37 shr $0x1f,%edx
│3.37 add %edx,%eax
│3.37 and $0x1,%eax
│3.37 sub %edx,%eax
│ }
26.97 │3.37 2 ← retq
Note that, this patch only supports TUI mode. For stdio, now it just keeps
original behavior. Will support it in a follow-up patch.
$ perf annotate compute_flag --stdio
Percent | Source code & Disassembly of div for cycles:ppp (7993 samples)
------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400640 <compute_flag>:
: compute_flag():
: volatile int count;
: static unsigned int s_randseed;
:
: __attribute__((noinline))
: int compute_flag()
: {
0.29 : 400640: sub $0x8,%rsp # +100.00%
: int i;
:
: i = rand() % 2;
42.93 : 400644: callq 400490 <rand@plt> # -100.00% (p:100.00%)
:
: return i;
0.10 : 400649: mov %eax,%edx # +100.00%
: }
0.94 : 40064b: add $0x8,%rsp
: {
: int i;
:
: i = rand() % 2;
:
: return i;
27.02 : 40064f: shr $0x1f,%edx
0.15 : 400652: add %edx,%eax
1.24 : 400654: and $0x1,%eax
2.08 : 400657: sub %edx,%eax
: }
25.26 : 400659: retq # -100.00% (p:100.00%)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180223170210.GC7045@tassilo.jf.intel.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1519724327-7773-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao
Arnaldo Carvalho de Melo
parent
ea85ab24c5
commit
bb848c14f8
@ -44,6 +44,7 @@ struct perf_annotate {
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bool full_paths;
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bool print_line;
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bool skip_missing;
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bool has_br_stack;
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const char *sym_hist_filter;
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const char *cpu_list;
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DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
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@ -146,16 +147,73 @@ static void process_branch_stack(struct branch_stack *bs, struct addr_location *
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free(bi);
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}
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static int hist_iter__branch_callback(struct hist_entry_iter *iter,
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struct addr_location *al __maybe_unused,
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bool single __maybe_unused,
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void *arg __maybe_unused)
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{
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struct hist_entry *he = iter->he;
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struct branch_info *bi;
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struct perf_sample *sample = iter->sample;
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struct perf_evsel *evsel = iter->evsel;
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int err;
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hist__account_cycles(sample->branch_stack, al, sample, false);
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bi = he->branch_info;
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err = addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx);
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if (err)
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goto out;
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err = addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx);
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out:
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return err;
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}
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static int process_branch_callback(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct addr_location *al __maybe_unused,
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struct perf_annotate *ann,
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struct machine *machine)
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{
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struct hist_entry_iter iter = {
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.evsel = evsel,
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.sample = sample,
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.add_entry_cb = hist_iter__branch_callback,
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.hide_unresolved = symbol_conf.hide_unresolved,
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.ops = &hist_iter_branch,
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};
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struct addr_location a;
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int ret;
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if (machine__resolve(machine, &a, sample) < 0)
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return -1;
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if (a.sym == NULL)
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return 0;
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if (a.map != NULL)
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a.map->dso->hit = 1;
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ret = hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann);
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return ret;
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}
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static int perf_evsel__add_sample(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct addr_location *al,
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struct perf_annotate *ann)
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struct perf_annotate *ann,
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struct machine *machine)
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{
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struct hists *hists = evsel__hists(evsel);
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struct hist_entry *he;
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int ret;
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if (ann->sym_hist_filter != NULL &&
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if ((!ann->has_br_stack || !ui__has_annotation()) &&
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ann->sym_hist_filter != NULL &&
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(al->sym == NULL ||
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strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
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/* We're only interested in a symbol named sym_hist_filter */
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@ -178,6 +236,9 @@ static int perf_evsel__add_sample(struct perf_evsel *evsel,
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*/
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process_branch_stack(sample->branch_stack, al, sample);
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if (ann->has_br_stack && ui__has_annotation())
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return process_branch_callback(evsel, sample, al, ann, machine);
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he = hists__add_entry(hists, al, NULL, NULL, NULL, sample, true);
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if (he == NULL)
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return -ENOMEM;
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@ -206,7 +267,8 @@ static int process_sample_event(struct perf_tool *tool,
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if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
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goto out_put;
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if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
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if (!al.filtered &&
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perf_evsel__add_sample(evsel, sample, &al, ann, machine)) {
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pr_warning("problem incrementing symbol count, "
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"skipping event\n");
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ret = -1;
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@ -238,6 +300,10 @@ static void hists__find_annotations(struct hists *hists,
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if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
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goto find_next;
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if (ann->sym_hist_filter &&
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(strcmp(he->ms.sym->name, ann->sym_hist_filter) != 0))
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goto find_next;
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notes = symbol__annotation(he->ms.sym);
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if (notes->src == NULL) {
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find_next:
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@ -269,6 +335,7 @@ static void hists__find_annotations(struct hists *hists,
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nd = rb_next(nd);
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} else if (use_browser == 1) {
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key = hist_entry__tui_annotate(he, evsel, NULL);
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switch (key) {
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case -1:
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if (!ann->skip_missing)
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@ -489,6 +556,9 @@ int cmd_annotate(int argc, const char **argv)
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if (annotate.session == NULL)
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return -1;
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annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
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HEADER_BRANCH_STACK);
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ret = symbol__annotation_init();
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if (ret < 0)
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goto out_delete;
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@ -499,9 +569,6 @@ int cmd_annotate(int argc, const char **argv)
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if (ret < 0)
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goto out_delete;
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if (setup_sorting(NULL) < 0)
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usage_with_options(annotate_usage, options);
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if (annotate.use_stdio)
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use_browser = 0;
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else if (annotate.use_tui)
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@ -511,6 +578,15 @@ int cmd_annotate(int argc, const char **argv)
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setup_browser(true);
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if (use_browser == 1 && annotate.has_br_stack) {
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sort__mode = SORT_MODE__BRANCH;
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if (setup_sorting(annotate.session->evlist) < 0)
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usage_with_options(annotate_usage, options);
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} else {
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if (setup_sorting(NULL) < 0)
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usage_with_options(annotate_usage, options);
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}
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ret = __cmd_annotate(&annotate);
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out_delete:
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