linux-kernel - Re: [RFC PATCH 6/7] perf, x86: large PEBS interrupt threshold

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Message-ID: <20140528174758.GO29957@tassilo.jf.intel.com>
Date:	Wed, 28 May 2014 10:47:58 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	"Yan, Zheng" <zheng.z.yan@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>
Subject: Re: [RFC PATCH 6/7] perf, x86: large PEBS interrupt threshold

> That's a plausible scenario if you consider two distinct sessions of a tool,
> i.e., two users running perf top or perf record some precise events.

Then they will start at different times (if they are not on different cores), 
so it's still not synchronized and unlikely to meet.

|----< 1000+ > -----|
A
         |------< 1000+> ------|
         B

-Andi
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