From: Alexei Starovoitov <ast@plumgrid.com>
To: He Kuang <hekuang@huawei.com>,
"Wangnan (F)" <wangnan0@huawei.com>,
Kaixu Xia <xiakaixu@huawei.com>,
davem@davemloft.net, acme@kernel.org, mingo@redhat.com,
a.p.zijlstra@chello.nl, masami.hiramatsu.pt@hitachi.com,
jolsa@kernel.org, daniel@iogearbox.net
Cc: linux-kernel@vger.kernel.org, pi3orama@163.com, netdev@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] bpf: Implement bpf_perf_event_sample_enable/disable() helpers
Date: Tue, 13 Oct 2015 22:14:39 -0700 [thread overview]
Message-ID: <561DE4BF.6090306@plumgrid.com> (raw)
In-Reply-To: <561CE2DB.2030409@huawei.com>
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.
prev parent reply other threads:[~2015-10-14 5:14 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-12 9:02 [RFC PATCH 0/2] bpf: enable/disable events stored in PERF_EVENT_ARRAY maps trace data output when perf sampling Kaixu Xia
2015-10-12 9:02 ` [RFC PATCH 1/2] perf: Add the flag sample_disable not to output data on samples Kaixu Xia
2015-10-12 12:02 ` Peter Zijlstra
2015-10-12 12:05 ` Wangnan (F)
2015-10-12 12:12 ` Peter Zijlstra
2015-10-12 14:14 ` kbuild test robot
2015-10-12 19:20 ` Alexei Starovoitov
2015-10-13 2:30 ` xiakaixu
2015-10-13 3:10 ` Alexei Starovoitov
2015-10-13 12:00 ` Sergei Shtylyov
2015-10-12 9:02 ` [RFC PATCH 2/2] bpf: Implement bpf_perf_event_sample_enable/disable() helpers Kaixu Xia
2015-10-12 19:29 ` Alexei Starovoitov
2015-10-13 3:27 ` Wangnan (F)
2015-10-13 3:39 ` Alexei Starovoitov
2015-10-13 3:51 ` Wangnan (F)
2015-10-13 4:16 ` Alexei Starovoitov
2015-10-13 4:34 ` Wangnan (F)
2015-10-13 5:15 ` Alexei Starovoitov
2015-10-13 6:57 ` Wangnan (F)
2015-10-13 10:54 ` He Kuang
2015-10-13 11:07 ` Wangnan (F)
2015-10-14 5:14 ` Alexei Starovoitov [this message]
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