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SubjectRe: [PATCH] perf script: Increase PID/TID width for output
Hi Adrian,

On Wed, May 31, 2023 at 9:54 PM Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> On 31/05/23 23:32, Namhyung Kim wrote:
> > On large systems, it's common that PID/TID is bigger than 5-digit and it
> > makes the output unaligned. Let's increase the width to 7.
>
> Might be worth noting that currently the biggest PID_MAX_LIMIT
> is 2^22 so pids don't get bigger than 7 digits presently.

Nice, will add that.

>
> >
> > Before:
> >
> > $ perf script
> > ...
> > swapper 0 [006] 1540823.803935: 1369324 cycles:P: ffffffff9c755588 ktime_get+0x18 ([kernel.kallsyms])
> > gvfsd-dnssd 95114 [004] 1540823.804164: 1643871 cycles:P: ffffffff9cfdca5c __get_user_8+0x1c ([kernel.kallsyms])
> > perf-exec 1558582 [000] 1540823.804209: 1018714 cycles:P: ffffffff9c924ab9 __slab_free+0x9 ([kernel.kallsyms])
> > nmcli 1558589 [007] 1540823.804384: 1859212 cycles:P: 7f70537a8ad8 __strchrnul_evex+0x18 (/usr/lib/x86_64-linux-gnu/libc.so.6>
> > sleep 1558582 [000] 1540823.804456: 987425 cycles:P: 7fd35bb27b30 _dl_init+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2>
> > dbus-daemon 3043 [003] 1540823.804575: 1564465 cycles:P: ffffffff9cb2bb70 llist_add_batch+0x0 ([kernel.kallsyms])
> > gdbus 1558592 [001] 1540823.804766: 1315219 cycles:P: ffffffff9c797b2e audit_filter_syscall+0x9e ([kernel.kallsyms])
> > NetworkManager 3452 [005] 1540823.805301: 1558782 cycles:P: 7fa957737748 g_bit_lock+0x58 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7400.5>
> >
> > After:
> >
> > $ perf script
> > ...
> > swapper 0 [006] 1540823.803935: 1369324 cycles:P: ffffffff9c755588 ktime_get+0x18 ([kernel.kallsyms])
> > gvfsd-dnssd 95114 [004] 1540823.804164: 1643871 cycles:P: ffffffff9cfdca5c __get_user_8+0x1c ([kernel.kallsyms])
> > perf-exec 1558582 [000] 1540823.804209: 1018714 cycles:P: ffffffff9c924ab9 __slab_free+0x9 ([kernel.kallsyms])
> > nmcli 1558589 [007] 1540823.804384: 1859212 cycles:P: 7f70537a8ad8 __strchrnul_evex+0x18 (/usr/lib/x86_64-linux-gnu/libc.so.6>
> > sleep 1558582 [000] 1540823.804456: 987425 cycles:P: 7fd35bb27b30 _dl_init+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2>
> > dbus-daemon 3043 [003] 1540823.804575: 1564465 cycles:P: ffffffff9cb2bb70 llist_add_batch+0x0 ([kernel.kallsyms])
> > gdbus 1558592 [001] 1540823.804766: 1315219 cycles:P: ffffffff9c797b2e audit_filter_syscall+0x9e ([kernel.kallsyms])
> > NetworkManager 3452 [005] 1540823.805301: 1558782 cycles:P: 7fa957737748 g_bit_lock+0x58 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7400.5>
> >
> > Signed-off-by: Namhyung Kim <namhyung@kernel.org>
>
> Acked-by: Adrian Hunter <adrian.hunter@intel.com>

Thanks for your review!
Namhyung


>
> > ---
> > tools/perf/builtin-script.c | 6 +++---
> > 1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> > index 029d5a597233..70549fc93b12 100644
> > --- a/tools/perf/builtin-script.c
> > +++ b/tools/perf/builtin-script.c
> > @@ -801,11 +801,11 @@ static int perf_sample__fprintf_start(struct perf_script *script,
> > }
> >
> > if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
> > - printed += fprintf(fp, "%5d/%-5d ", sample->pid, sample->tid);
> > + printed += fprintf(fp, "%7d/%-7d ", sample->pid, sample->tid);
> > else if (PRINT_FIELD(PID))
> > - printed += fprintf(fp, "%5d ", sample->pid);
> > + printed += fprintf(fp, "%7d ", sample->pid);
> > else if (PRINT_FIELD(TID))
> > - printed += fprintf(fp, "%5d ", sample->tid);
> > + printed += fprintf(fp, "%7d ", sample->tid);
> >
> > if (PRINT_FIELD(CPU)) {
> > if (latency_format)
>

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