Messages in this thread | | | From | Ian Rogers <> | Date | Fri, 28 Jul 2023 10:57:26 -0700 | Subject | Re: [PATCH] perf script: print cgroup on the same line as comm |
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On Fri, Jul 28, 2023 at 10:42 AM Ivan Babrou <ivan@cloudflare.com> wrote: > > On Mon, Jul 17, 2023 at 5:07 PM Ivan Babrou <ivan@cloudflare.com> wrote: > > > > Commit 3fd7a168bf51 ("perf script: Add 'cgroup' field for output") > > added support for printing cgroup path in perf script output. > > > > It was okay if you didn't want any stacks: > > > > $ sudo perf script --comms jpegtran:23f4bf -F comm,tid,cpu,time,cgroup > > jpegtran:23f4bf 3321915 [013] 404718.587488: /idle.slice/polish.service > > jpegtran:23f4bf 3321915 [031] 404718.592073: /idle.slice/polish.service > > > > With stacks it gets messier as cgroup is printed after the stack: > > > > $ perf script --comms jpegtran:23f4bf -F comm,tid,cpu,time,cgroup,ip,sym > > jpegtran:23f4bf 3321915 [013] 404718.587488: > > 5c554 compress_output > > 570d9 jpeg_finish_compress > > 3476e jpegtran_main > > 330ee jpegtran::main > > 326e2 core::ops::function::FnOnce::call_once (inlined) > > 326e2 std::sys_common::backtrace::__rust_begin_short_backtrace > > /idle.slice/polish.service > > jpegtran:23f4bf 3321915 [031] 404718.592073: > > 8474d jsimd_encode_mcu_AC_first_prepare_sse2.PADDING > > 55af68e62fff [unknown] > > /idle.slice/polish.service > > > > Let's instead print cgroup on the same line as comm: > > > > $ perf script --comms jpegtran:23f4bf -F comm,tid,cpu,time,cgroup,ip,sym > > jpegtran:23f4bf 3321915 [013] 404718.587488: /idle.slice/polish.service > > 5c554 compress_output > > 570d9 jpeg_finish_compress > > 3476e jpegtran_main > > 330ee jpegtran::main > > 326e2 core::ops::function::FnOnce::call_once (inlined) > > 326e2 std::sys_common::backtrace::__rust_begin_short_backtrace > > > > jpegtran:23f4bf 3321915 [031] 404718.592073: /idle.slice/polish.service > > 8474d jsimd_encode_mcu_AC_first_prepare_sse2.PADDING > > 55af68e62fff [unknown] > > > > Signed-off-by: Ivan Babrou <ivan@cloudflare.com> > > Fixes: 3fd7a168bf51 ("perf script: Add 'cgroup' field for output")
This change makes sense to me. Namhyung, wdyt?
Thanks, Ian
> > --- > > tools/perf/builtin-script.c | 22 +++++++++++----------- > > 1 file changed, 11 insertions(+), 11 deletions(-) > > > > diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c > > index 200b3e7ea8da..517bf25750c8 100644 > > --- a/tools/perf/builtin-script.c > > +++ b/tools/perf/builtin-script.c > > @@ -2199,6 +2199,17 @@ static void process_event(struct perf_script *script, > > if (PRINT_FIELD(RETIRE_LAT)) > > fprintf(fp, "%16" PRIu16, sample->retire_lat); > > > > + if (PRINT_FIELD(CGROUP)) { > > + const char *cgrp_name; > > + struct cgroup *cgrp = cgroup__find(machine->env, > > + sample->cgroup); > > + if (cgrp != NULL) > > + cgrp_name = cgrp->name; > > + else > > + cgrp_name = "unknown"; > > + fprintf(fp, " %s", cgrp_name); > > + } > > + > > if (PRINT_FIELD(IP)) { > > struct callchain_cursor *cursor = NULL; > > > > @@ -2243,17 +2254,6 @@ static void process_event(struct perf_script *script, > > if (PRINT_FIELD(CODE_PAGE_SIZE)) > > fprintf(fp, " %s", get_page_size_name(sample->code_page_size, str)); > > > > - if (PRINT_FIELD(CGROUP)) { > > - const char *cgrp_name; > > - struct cgroup *cgrp = cgroup__find(machine->env, > > - sample->cgroup); > > - if (cgrp != NULL) > > - cgrp_name = cgrp->name; > > - else > > - cgrp_name = "unknown"; > > - fprintf(fp, " %s", cgrp_name); > > - } > > - > > perf_sample__fprintf_ipc(sample, attr, fp); > > > > fprintf(fp, "\n"); > > -- > > 2.41.0 > > > > A friendly bump in case this slipped through the cracks.
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