linux-kernel - Re: [RFC PATCH 2/2] bpf: Implement bpf_perf_event_sample

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Message-ID: <561DE4BF.6090306@plumgrid.com>
Date:	Tue, 13 Oct 2015 22:14:39 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	He Kuang <hekuang@...wei.com>, "Wangnan (F)" <wangnan0@...wei.com>,
	Kaixu Xia <xiakaixu@...wei.com>, davem@...emloft.net,
	acme@...nel.org, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	masami.hiramatsu.pt@...achi.com, jolsa@...nel.org,
	daniel@...earbox.net
Cc:	linux-kernel@...r.kernel.org, pi3orama@....com,
	netdev@...r.kernel.org
Subject: Re: [RFC PATCH 2/2] bpf: Implement
 bpf_perf_event_sample_enable/disable() helpers

On 10/13/15 3:54 AM, He Kuang wrote:
> If we want perf to reflect as soon as our sample event be generated,
> --no-buffering should be used, but this option has a greater
> impact on performance.

no_buffering doesn't have to be applied to all events obviously.

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