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Message-ID: <YNIqPIIKqmWrfl5n@kernel.org>
Date: Tue, 22 Jun 2021 15:21:48 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>, Andi Kleen <ak@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Namhyung Kim <namhyung@...nel.org>,
Leo Yan <leo.yan@...aro.org>,
Kan Liang <kan.liang@...ux.intel.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 03/11] perf script: Share addr_al between functions
Em Mon, Jun 21, 2021 at 06:05:06PM +0300, Adrian Hunter escreveu:
> Share the addr_location of 'addr' so that it need not be resolved more than
> once.
Another nice patch, i.e. don't resolve it unconditionally, let the first
function that needs it under a callchain to do it, then reuse if another
needs it.
Looks ok, applied.
- Arnaldo
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
> tools/perf/builtin-script.c | 38 +++++++++++++++++++++++--------------
> 1 file changed, 24 insertions(+), 14 deletions(-)
>
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index ff7b43899f2e..d2771a997e26 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -1337,17 +1337,18 @@ static const char *resolve_branch_sym(struct perf_sample *sample,
> struct evsel *evsel,
> struct thread *thread,
> struct addr_location *al,
> + struct addr_location *addr_al,
> u64 *ip)
> {
> - struct addr_location addr_al;
> struct perf_event_attr *attr = &evsel->core.attr;
> const char *name = NULL;
>
> if (sample->flags & (PERF_IP_FLAG_CALL | PERF_IP_FLAG_TRACE_BEGIN)) {
> if (sample_addr_correlates_sym(attr)) {
> - thread__resolve(thread, &addr_al, sample);
> - if (addr_al.sym)
> - name = addr_al.sym->name;
> + if (!addr_al->thread)
> + thread__resolve(thread, addr_al, sample);
> + if (addr_al->sym)
> + name = addr_al->sym->name;
> else
> *ip = sample->addr;
> } else {
> @@ -1365,7 +1366,9 @@ static const char *resolve_branch_sym(struct perf_sample *sample,
> static int perf_sample__fprintf_callindent(struct perf_sample *sample,
> struct evsel *evsel,
> struct thread *thread,
> - struct addr_location *al, FILE *fp)
> + struct addr_location *al,
> + struct addr_location *addr_al,
> + FILE *fp)
> {
> struct perf_event_attr *attr = &evsel->core.attr;
> size_t depth = thread_stack__depth(thread, sample->cpu);
> @@ -1382,7 +1385,7 @@ static int perf_sample__fprintf_callindent(struct perf_sample *sample,
> if (thread->ts && sample->flags & PERF_IP_FLAG_RETURN)
> depth += 1;
>
> - name = resolve_branch_sym(sample, evsel, thread, al, &ip);
> + name = resolve_branch_sym(sample, evsel, thread, al, addr_al, &ip);
>
> if (PRINT_FIELD(DSO) && !(PRINT_FIELD(IP) || PRINT_FIELD(ADDR))) {
> dlen += fprintf(fp, "(");
> @@ -1466,6 +1469,7 @@ static int perf_sample__fprintf_bts(struct perf_sample *sample,
> struct evsel *evsel,
> struct thread *thread,
> struct addr_location *al,
> + struct addr_location *addr_al,
> struct machine *machine, FILE *fp)
> {
> struct perf_event_attr *attr = &evsel->core.attr;
> @@ -1474,7 +1478,7 @@ static int perf_sample__fprintf_bts(struct perf_sample *sample,
> int printed = 0;
>
> if (PRINT_FIELD(CALLINDENT))
> - printed += perf_sample__fprintf_callindent(sample, evsel, thread, al, fp);
> + printed += perf_sample__fprintf_callindent(sample, evsel, thread, al, addr_al, fp);
>
> /* print branch_from information */
> if (PRINT_FIELD(IP)) {
> @@ -1931,7 +1935,8 @@ static void perf_sample__fprint_metric(struct perf_script *script,
> static bool show_event(struct perf_sample *sample,
> struct evsel *evsel,
> struct thread *thread,
> - struct addr_location *al)
> + struct addr_location *al,
> + struct addr_location *addr_al)
> {
> int depth = thread_stack__depth(thread, sample->cpu);
>
> @@ -1947,7 +1952,7 @@ static bool show_event(struct perf_sample *sample,
> } else {
> const char *s = symbol_conf.graph_function;
> u64 ip;
> - const char *name = resolve_branch_sym(sample, evsel, thread, al,
> + const char *name = resolve_branch_sym(sample, evsel, thread, al, addr_al,
> &ip);
> unsigned nlen;
>
> @@ -1972,6 +1977,7 @@ static bool show_event(struct perf_sample *sample,
> static void process_event(struct perf_script *script,
> struct perf_sample *sample, struct evsel *evsel,
> struct addr_location *al,
> + struct addr_location *addr_al,
> struct machine *machine)
> {
> struct thread *thread = al->thread;
> @@ -2005,7 +2011,7 @@ static void process_event(struct perf_script *script,
> perf_sample__fprintf_flags(sample->flags, fp);
>
> if (is_bts_event(attr)) {
> - perf_sample__fprintf_bts(sample, evsel, thread, al, machine, fp);
> + perf_sample__fprintf_bts(sample, evsel, thread, al, addr_al, machine, fp);
> return;
> }
>
> @@ -2168,6 +2174,7 @@ static int process_sample_event(struct perf_tool *tool,
> {
> struct perf_script *scr = container_of(tool, struct perf_script, tool);
> struct addr_location al;
> + struct addr_location addr_al;
>
> if (perf_time__ranges_skip_sample(scr->ptime_range, scr->range_num,
> sample->time)) {
> @@ -2197,7 +2204,10 @@ static int process_sample_event(struct perf_tool *tool,
> if (al.filtered)
> goto out_put;
>
> - if (!show_event(sample, evsel, al.thread, &al))
> + /* Set thread to NULL to indicate addr_al is not initialized */
> + addr_al.thread = NULL;
> +
> + if (!show_event(sample, evsel, al.thread, &al, &addr_al))
> goto out_put;
>
> if (evswitch__discard(&scr->evswitch, evsel))
> @@ -2205,16 +2215,16 @@ static int process_sample_event(struct perf_tool *tool,
>
> if (scripting_ops) {
> struct addr_location *addr_al_ptr = NULL;
> - struct addr_location addr_al;
>
> if ((evsel->core.attr.sample_type & PERF_SAMPLE_ADDR) &&
> sample_addr_correlates_sym(&evsel->core.attr)) {
> - thread__resolve(al.thread, &addr_al, sample);
> + if (!addr_al.thread)
> + thread__resolve(al.thread, &addr_al, sample);
> addr_al_ptr = &addr_al;
> }
> scripting_ops->process_event(event, sample, evsel, &al, addr_al_ptr);
> } else {
> - process_event(scr, sample, evsel, &al, machine);
> + process_event(scr, sample, evsel, &al, &addr_al, machine);
> }
>
> out_put:
> --
> 2.17.1
>
--
- Arnaldo
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