Re: [PATCH v1 2/6] perf trace: Ignore thread hashing in summary

[Ian Rogers]

On Wed, Feb 14, 2024 at 10:27 AM Ian Rogers <irogers@xxxxxxxxxx> wrote:
>
> On Wed, Feb 14, 2024 at 9:25 AM Arnaldo Carvalho de Melo
> <acme@xxxxxxxxxx> wrote:
> >
> > On Tue, Feb 13, 2024 at 10:37:04PM -0800, Ian Rogers wrote:
> > > Commit 91e467bc568f ("perf machine: Use hashtable for machine
> > > threads") made the iteration of thread tids unordered. The perf trace
> > > --summary output sorts and prints each hash bucket, rather than all
> > > threads globally. Change this behavior by turn all threads into a
> > > list, sort the list by number of trace events then by tids, finally
> > > print the list. This also allows the rbtree in threads to be not
> > > accessed outside of machine.
> >
> > Can you please provide a refresh of the output that is changed by your patch?
>
> Hmm.. looks like perf trace record has broken and doesn't produce
> output in newer perfs. It works on 6.5 and so a bisect is necessary.

Bisect result:
```
9925495d96efc14d885ba66c5696f664fe0e663c is the first bad commit
commit 9925495d96efc14d885ba66c5696f664fe0e663c
Author: Ian Rogers <irogers@xxxxxxxxxx>
Date:   Thu Sep 14 14:19:45 2023 -0700

   perf build: Default BUILD_BPF_SKEL, warn/disable for missing deps
..
https://lore.kernel.org/r/20230914211948.814999-3-irogers@xxxxxxxxxx
```

Now to do the bisect with BUILD_BPF_SKEL=1 on each make.

Thanks,
Ian