Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1221177

Re: [PATCH v2 2/4] perf: Add function to enable perf events in kernel with ring buffer

Show all headers | View raw

On 2015/09/08 18:32, Alexander Shishkin wrote:
> Takao Indoh <indou.takao@jp.fujitsu.com> writes:
> 
>> perf_event_create_kernel_counter is used to enable perf events in kernel
>> without buffer for logging its events. This patch add new fucntion which
>> enable perf events with ring buffer. Intel PT logger uses this to enable
>> Intel PT and some associated events with its log buffer.
> 
> Have you seen [1] and related patches? I haven't gotten around to
> updating them yet, but hopefully it's going to happen soon.
> 
> The problem is that for such api to work, this memory needs to be
> accounted, especially when you start handling event inheritance. For
> system crash dump it doesn't really matter, but I also need a similar
> api for per-task core dumps, for example.

I have not seen this, I'll check it. You or someone else are working on
api for process core dump?

Thanks,
Takao Indoh

> 
> [1] https://lkml.org/lkml/2014/10/13/290
> 
> Thanks,
> --
> Alex
> 


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 0/4] x86: Intel Processor Trace Logger Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-08 07:50 +0200
  [PATCH v2 3/4] perf/x86/intel/pt: Add Intel PT logger Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-08 08:00 +0200
    Re: [PATCH v2 3/4] perf/x86/intel/pt: Add Intel PT logger Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2015-09-08 11:50 +0200
      Re: [PATCH v2 3/4] perf/x86/intel/pt: Add Intel PT logger Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-09 04:50 +0200
        Re: [PATCH v2 3/4] perf/x86/intel/pt: Add Intel PT logger Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2015-09-15 14:10 +0200
  [PATCH v2 4/4] x86: Stop Intel PT and save its registers when panic occurs Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-08 08:00 +0200
  [PATCH v2 2/4] perf: Add function to enable perf events in kernel with ring buffer Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-08 08:00 +0200
    Re: [PATCH v2 2/4] perf: Add function to enable perf events in kernel with ring buffer Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2015-09-08 11:40 +0200
      Re: [PATCH v2 2/4] perf: Add function to enable perf events in kernel  with ring buffer Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-09 04:20 +0200
        Re: [PATCH v2 2/4] perf: Add function to enable perf events in kernel with ring buffer Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2015-09-15 14:10 +0200
  [PATCH v2 1/4] perf/trace: Add function to find event type by name Takao Indoh <indou.takao@jp.fujitsu.com> - 2015-09-08 08:00 +0200

csiph-web