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Date: Thu, 8 Mar 2018 13:22:15 +0800
From: "Jin, Yao" <yao.jin@...ux.intel.com>
To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v2] perf annotate: Support to display the IPC/Cycle in tui
mode
Hi,
Could this patch be accepted?
I'm working on the supporting for stdio mode. I just wish to post the
patch series after this patch being merged.
Thanks
Jin Yao
On 2/27/2018 5:38 PM, Jin Yao wrote:
> 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%)
>
> Change-log:
> -----------
> v2:
> ---
> No code change. Just change the patch description to make it more clear.
>
> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> ---
> tools/perf/builtin-annotate.c | 88 ++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 82 insertions(+), 6 deletions(-)
>
> diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
> index f15731a..ead6ae4 100644
> --- a/tools/perf/builtin-annotate.c
> +++ b/tools/perf/builtin-annotate.c
> @@ -44,6 +44,7 @@ struct perf_annotate {
> bool full_paths;
> bool print_line;
> bool skip_missing;
> + bool has_br_stack;
> const char *sym_hist_filter;
> const char *cpu_list;
> DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
> @@ -146,16 +147,73 @@ static void process_branch_stack(struct branch_stack *bs, struct addr_location *
> free(bi);
> }
>
> +static int hist_iter__branch_callback(struct hist_entry_iter *iter,
> + struct addr_location *al __maybe_unused,
> + bool single __maybe_unused,
> + void *arg __maybe_unused)
> +{
> + struct hist_entry *he = iter->he;
> + struct branch_info *bi;
> + struct perf_sample *sample = iter->sample;
> + struct perf_evsel *evsel = iter->evsel;
> + int err;
> +
> + hist__account_cycles(sample->branch_stack, al, sample, false);
> +
> + bi = he->branch_info;
> + err = addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx);
> +
> + if (err)
> + goto out;
> +
> + err = addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx);
> +
> +out:
> + return err;
> +}
> +
> +static int process_branch_callback(struct perf_evsel *evsel,
> + struct perf_sample *sample,
> + struct addr_location *al __maybe_unused,
> + struct perf_annotate *ann,
> + struct machine *machine)
> +{
> + struct hist_entry_iter iter = {
> + .evsel = evsel,
> + .sample = sample,
> + .add_entry_cb = hist_iter__branch_callback,
> + .hide_unresolved = symbol_conf.hide_unresolved,
> + .ops = &hist_iter_branch,
> + };
> +
> + struct addr_location a;
> + int ret;
> +
> + if (machine__resolve(machine, &a, sample) < 0)
> + return -1;
> +
> + if (a.sym == NULL)
> + return 0;
> +
> + if (a.map != NULL)
> + a.map->dso->hit = 1;
> +
> + ret = hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann);
> + return ret;
> +}
> +
> static int perf_evsel__add_sample(struct perf_evsel *evsel,
> struct perf_sample *sample,
> struct addr_location *al,
> - struct perf_annotate *ann)
> + struct perf_annotate *ann,
> + struct machine *machine)
> {
> struct hists *hists = evsel__hists(evsel);
> struct hist_entry *he;
> int ret;
>
> - if (ann->sym_hist_filter != NULL &&
> + if ((!ann->has_br_stack || !ui__has_annotation()) &&
> + ann->sym_hist_filter != NULL &&
> (al->sym == NULL ||
> strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
> /* We're only interested in a symbol named sym_hist_filter */
> @@ -178,6 +236,9 @@ static int perf_evsel__add_sample(struct perf_evsel *evsel,
> */
> process_branch_stack(sample->branch_stack, al, sample);
>
> + if (ann->has_br_stack && ui__has_annotation())
> + return process_branch_callback(evsel, sample, al, ann, machine);
> +
> he = hists__add_entry(hists, al, NULL, NULL, NULL, sample, true);
> if (he == NULL)
> return -ENOMEM;
> @@ -206,7 +267,8 @@ static int process_sample_event(struct perf_tool *tool,
> if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
> goto out_put;
>
> - if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
> + if (!al.filtered &&
> + perf_evsel__add_sample(evsel, sample, &al, ann, machine)) {
> pr_warning("problem incrementing symbol count, "
> "skipping event\n");
> ret = -1;
> @@ -238,6 +300,10 @@ static void hists__find_annotations(struct hists *hists,
> if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
> goto find_next;
>
> + if (ann->sym_hist_filter &&
> + (strcmp(he->ms.sym->name, ann->sym_hist_filter) != 0))
> + goto find_next;
> +
> notes = symbol__annotation(he->ms.sym);
> if (notes->src == NULL) {
> find_next:
> @@ -269,6 +335,7 @@ static void hists__find_annotations(struct hists *hists,
> nd = rb_next(nd);
> } else if (use_browser == 1) {
> key = hist_entry__tui_annotate(he, evsel, NULL);
> +
> switch (key) {
> case -1:
> if (!ann->skip_missing)
> @@ -489,6 +556,9 @@ int cmd_annotate(int argc, const char **argv)
> if (annotate.session == NULL)
> return -1;
>
> + annotate.has_br_stack = perf_header__has_feat(&annotate.session->header,
> + HEADER_BRANCH_STACK);
> +
> ret = symbol__annotation_init();
> if (ret < 0)
> goto out_delete;
> @@ -499,9 +569,6 @@ int cmd_annotate(int argc, const char **argv)
> if (ret < 0)
> goto out_delete;
>
> - if (setup_sorting(NULL) < 0)
> - usage_with_options(annotate_usage, options);
> -
> if (annotate.use_stdio)
> use_browser = 0;
> else if (annotate.use_tui)
> @@ -511,6 +578,15 @@ int cmd_annotate(int argc, const char **argv)
>
> setup_browser(true);
>
> + if (use_browser == 1 && annotate.has_br_stack) {
> + sort__mode = SORT_MODE__BRANCH;
> + if (setup_sorting(annotate.session->evlist) < 0)
> + usage_with_options(annotate_usage, options);
> + } else {
> + if (setup_sorting(NULL) < 0)
> + usage_with_options(annotate_usage, options);
> + }
> +
> ret = __cmd_annotate(&annotate);
>
> out_delete:
>
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