From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: Does perf support different length of user-space hw_breakpoint?
Date: Mon, 12 May 2014 10:05:03 +0200
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To: xiakaixu <xiakaixu@huawei.com>
Cc: 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


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On Mon, May 12, 2014 at 03:52:54PM +0800, xiakaixu wrote:
> Hi guys,
>=20
> 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?
>=20
> Seems perf only support HW_BREAKPOINT_LEN_4/sizeof(long)
> by default from the source code and simple test.
>=20
> May I have your opinions if I want to trace different bytes of
> hw_breakpoint addr?

Frederic?

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