Re: [patch 08/11] perf_event_open.2: 4.1 add aux_watermark

From	"Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [patch 08/11] perf_event_open.2: 4.1 add aux_watermark
Date	2015-10-14 08:40 +0200
Message-ID	<qjnTc-78Z-17@gated-at.bofh.it> (permalink)
References	<pPsan-4z3-29@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 07/23/2015 07:14 PM, Vince Weaver wrote:
> 
> 
> This manpage patch relates to the addition of the aux_watermark attr
> field in the following commit:

Thanks, Vince. Applied.

Cheers,

Michael


> 	commit 1a5941312414c71dece6717da9a0fa1303127afa
> 	Author: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> 
> 	perf: Add wakeup watermark control to the AUX area
> 
> 	Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> 	Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> 	Cc: Borislav Petkov <bp@alien8.de>
> 	Cc: Frederic Weisbecker <fweisbec@gmail.com>
> 	Cc: H. Peter Anvin <hpa@zytor.com>
> 	Cc: Kaixu Xia <kaixu.xia@linaro.org>
> 	Cc: Linus Torvalds <torvalds@linux-foundation.org>
> 	Cc: Mike Galbraith <efault@gmx.de>
> 	Cc: Paul Mackerras <paulus@samba.org>
> 	Cc: Robert Richter <rric@kernel.org>
> 	Cc: Stephane Eranian <eranian@google.com>
> 	Cc: Thomas Gleixner <tglx@linutronix.de>
> 	Cc: acme@infradead.org
> 	Cc: adrian.hunter@intel.com
> 	Cc: kan.liang@intel.com
> 	Cc: markus.t.metzger@intel.com
> 	Cc: mathieu.poirier@linaro.org
> 	Link: http://lkml.kernel.org/r/1421237903-181015-10-git-send-email-alexander.shishkin@linux.intel.com
> 	Signed-off-by: Ingo Molnar <mingo@kernel.org>
> 
> Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
> 
> diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2
> index 238eb62..19c5c23 100644
> --- a/man2/perf_event_open.2
> +++ b/man2/perf_event_open.2
> @@ -259,6 +259,9 @@ struct perf_event_attr {
>                                     samples */
>      __s32 clockid;              /* clock to use for time fields */
>      __u64 sample_regs_intr;     /* regs to dump on samples */
> +    __u32 aux_watermark;        /* aux bytes before wakeup */
> +    __u32 __reserved_2;         /* align to u64 */
> +
>  };
>  .fi
>  .in
> @@ -357,6 +360,11 @@ is 104 corresponding to the addition of
>  .I sample_regs_intr
>  in Linux 3.19.
>  .\" commit 60e2364e60e86e81bc6377f49779779e6120977f
> +.B PERF_ATTR_SIZE_VER5
> +is 112 corresponding to the addition of
> +.I aux_watermak
> +in Linux 4.1.
> +.\" commit 1a5941312414c71dece6717da9a0fa1303127afa
>  .TP
>  .I "config"
>  This specifies which event you want, in conjunction with
> @@ -1284,6 +1292,12 @@ with
>  .BR CLOCK_MONOTONIC , CLOCK_MONOTONIC_RAW , CLOCK_REALTIME ,
>  .BR CLOCK_BOOTTIME ", and " CLOCK_TAI
>  currently supported.
> +.TP
> +.IR "aux_watermark" " (since Linux 4.1)"
> +.\" commit 1a5941312414c71dece6717da9a0fa1303127afa
> +This specifies how much data is required to trigger a
> +.B PERF_RECORD_AUX
> +sample.
>  .SS Reading results
>  Once a
>  .BR perf_event_open ()
> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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Re: [patch 08/11] perf_event_open.2: 4.1 add aux_watermark "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2015-10-14 08:40 +0200

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