Re: [PATCH v4 00/12] Introduce threaded trace streaming for basic perf record operation

[Jiri Olsa]

On Tue, Apr 06, 2021 at 11:37:26AM +0300, Bayduraev, Alexey V wrote:
> 
> Changes in v4:
> - renamed 'comm' structure to 'pipes'
> - moved thread fd/maps messages to verbose=2
> - fixed leaks during allocation of thread_data structures
> - fixed leaks during allocation of thread masks
> - fixed possible fails when releasing thread masks
> 
> v3: https://lore.kernel.org/lkml/7d197a2d-56e2-896d-bf96-6de0a4db1fb8@xxxxxxxxxxxxxxx/

hi,
I recall there was some issue wrt threading and intel_pt,
which we either need to fixed or we need to disable threads
for it

	[root@krava perf]# ./perf record -e intel_pt// --threads=cpu
	^C[ perf record: Woken up 121 times to write data ]
	Warning:
	AUX data lost 95 times out of 206!

	[ perf record: Captured and wrote 211.364 MB perf.data ]

	[root@krava perf]# ./perf script
	Segmentation fault (core dumped)

the fix should already be in the perf/record_threads branch,

jirka