linux-kernel - Re: [PATCH 10/31] perf test: Enforce LLVM test for BPF test

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Message-ID: <5634523B.8060109@huawei.com>
Date:	Sat, 31 Oct 2015 13:31:39 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	<ast@...mgrid.com>, <brendan.d.gregg@...il.com>,
	<a.p.zijlstra@...llo.nl>, <daniel@...earbox.net>,
	<dsahern@...il.com>, <hekuang@...wei.com>, <jolsa@...nel.org>,
	<lizefan@...wei.com>, <masami.hiramatsu.pt@...achi.com>,
	<namhyung@...nel.org>, <paulus@...ba.org>,
	<linux-kernel@...r.kernel.org>, <pi3orama@....com>,
	<xiakaixu@...wei.com>
Subject: Re: [PATCH 10/31] perf test: Enforce LLVM test for BPF test



On 2015/10/30 6:37, Arnaldo Carvalho de Melo wrote:
> Em Wed, Oct 14, 2015 at 12:41:21PM +0000, Wang Nan escreveu:
>> This patch replaces the original toy BPF program with previous introduced
>> bpf-script-example.c. Dynamically embedded it into 'llvm-src.c'.
>>
>> The newly introduced BPF program attaches a BPF program at
>> 'sys_epoll_pwait()', and collect half samples from it. perf itself never
> "collect half samples from it"? Can you rephrase this?

I mean half of epoll_pwait syscall will be captured. This test
case totally issue 111 calls.

Thank you.

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