From: "Yan, Zheng" <zheng.z.yan@intel.com>
To: unlisted-recipients:; (no To-header on input)
Cc: "Kleen, Andi" <andi.kleen@intel.com>,
linux-kernel@vger.kernel.org, mingo@kernel.org,
acme@infradead.org, eranian@google.com, andi@firstfloor.org
Subject: Re: [PATCH v3 6/9] perf, x86: handle multiple records in PEBS buffer
Date: Thu, 31 Jul 2014 15:31:35 +0800 [thread overview]
Message-ID: <53D9F0D7.7030002@intel.com> (raw)
In-Reply-To: <20140728065255.GI6758@twins.programming.kicks-ass.net>
On 07/28/2014 02:52 PM, Peter Zijlstra wrote:
> On Mon, Jul 28, 2014 at 10:24:30AM +0800, Yan, Zheng wrote:
>
>> I don't think this method works for interrupt threshold > 1 case. When collision
>> happens, the hardware only create one PEBS record. The status in next record has
>> nothing to do with the collision record.
>
> Andi previously stated that the hardware will always generate a record
> for each event:
>
> http://marc.info/?l=linux-kernel&m=140129731708247
>
> Please lock yourselves in room and do not come out until you can give a
> straight and coherent answer.
>
Andi,
please confirm this
Regards
Yan, Zheng
next prev parent reply other threads:[~2014-07-31 7:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-22 8:09 [PATCH v3 0/7] perf, x86: large PEBS interrupt threshold Yan, Zheng
2014-07-22 8:09 ` [PATCH v3 1/9] perf, core: introduce pmu context switch callback Yan, Zheng
2014-07-22 8:09 ` [PATCH v3 2/9] perf, x86: use context switch callback to flush LBR stack Yan, Zheng
2014-07-22 8:09 ` [PATCH v3 3/9] perf, x86: use the PEBS auto reload mechanism when possible Yan, Zheng
2014-07-22 8:09 ` [PATCH v3 4/9] perf, x86: introduce setup_pebs_sample_data() Yan, Zheng
2014-07-22 8:09 ` [PATCH v3 5/9] perf, x86: large PEBS interrupt threshold Yan, Zheng
2014-07-22 16:16 ` Andi Kleen
2014-07-23 0:59 ` Yan, Zheng
2014-07-22 8:09 ` [PATCH v3 6/9] perf, x86: handle multiple records in PEBS buffer Yan, Zheng
2014-07-25 8:10 ` Peter Zijlstra
2014-07-25 8:34 ` Yan, Zheng
2014-07-25 14:06 ` Peter Zijlstra
2014-07-28 2:24 ` Yan, Zheng
2014-07-28 3:36 ` Andi Kleen
2014-07-28 6:52 ` Peter Zijlstra
2014-07-31 7:31 ` Yan, Zheng [this message]
2014-07-31 14:44 ` Andi Kleen
2014-07-31 15:25 ` Peter Zijlstra
2014-07-25 15:04 ` Andi Kleen
2014-07-25 15:53 ` Peter Zijlstra
2014-07-25 16:40 ` Andi Kleen
2014-07-28 3:20 ` Yan, Zheng
2014-07-28 3:34 ` Andi Kleen
2014-07-28 6:54 ` Peter Zijlstra
2014-07-22 8:10 ` [PATCH v3 7/9] perf, x86: drain PEBS buffer during context switch Yan, Zheng
2014-07-22 8:10 ` [PATCH v3 8/9] perf, x86: enlarge PEBS buffer Yan, Zheng
2014-07-22 8:10 ` [PATCH v3 9/9] tools, perf: Allow the user to disable time stamps Yan, Zheng
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