From: Peter Zijlstra <peterz@infradead.org>
To: kaixu xia <xiakaixu1987@gmail.com>
Cc: xiakaixu <xiakaixu@huawei.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
paulus@samba.org, Ingo Molnar <mingo@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@redhat.com>, Borislav Petkov <bp@alien8.de>,
Namhyung Kim <namhyung@kernel.org>,
Huxinwei <huxinwei@huawei.com>,
peifeiyue@huawei.com, fweisbec@gmail.com
Subject: Re: Does perf support different length of user-space hw_breakpoint?
Date: Mon, 12 May 2014 10:48:23 +0200 [thread overview]
Message-ID: <20140512084823.GO30445@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAGjdHukwC3cu3YOSSteXsC4_52m-YTdAAYCfXV+q5A2pnW+CKQ@mail.gmail.com>
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On Mon, May 12, 2014 at 04:20:44PM +0800, kaixu xia wrote:
> 2014-05-12 16:05 GMT+08:00 Peter Zijlstra <peterz@infradead.org>:
>
> > On Mon, May 12, 2014 at 03:52:54PM +0800, xiakaixu wrote:
> > > Hi guys,
> > >
> > > Does perf support different length of user-space hw_breakpoint,
> > > such as HW_BREAKPOINT_LEN_1/HW_BREAKPOINT_LEN_2/HW_BREAKPOINT_LEN_4/
> > > HW_BREAKPOINT_LEN_8?
> > >
> > > Seems perf only support HW_BREAKPOINT_LEN_4/sizeof(long)
> > > by default from the source code and simple test.
> > >
> > > May I have your opinions if I want to trace different bytes of
> > > hw_breakpoint addr?
> >
> > Frederic?
> >
>
> Sorry, can not fully understand it. Can you give more details on that?
I asked Frederic to answer your question :-)
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next prev parent reply other threads:[~2014-05-12 8:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 7:52 Does perf support different length of user-space hw_breakpoint? xiakaixu
2014-05-12 7:52 ` xiakaixu
2014-05-12 8:05 ` Peter Zijlstra
[not found] ` <CAGjdHukwC3cu3YOSSteXsC4_52m-YTdAAYCfXV+q5A2pnW+CKQ@mail.gmail.com>
2014-05-12 8:48 ` Peter Zijlstra [this message]
2014-05-12 9:00 ` xiakaixu
2014-05-12 9:00 ` xiakaixu
2014-05-13 11:38 ` xiakaixu
2014-05-13 11:38 ` xiakaixu
2014-05-13 12:00 ` Jiri Olsa
2014-05-13 15:06 ` Frederic Weisbecker
2014-05-14 2:55 ` xiakaixu
2014-05-14 2:55 ` xiakaixu
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