From: Ralf Baechle <ralf@linux-mips.org>
To: zhuzhenhua <zzh.hust@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Subject: Re: is there a way to read cp0_performance in user space?
Date: Tue, 14 Mar 2006 12:41:00 +0000 [thread overview]
Message-ID: <20060314124100.GA4438@linux-mips.org> (raw)
In-Reply-To: <50c9a2250603131856n61c75573w99b4e5f4e3bbce10@mail.gmail.com>
On Tue, Mar 14, 2006 at 10:56:57AM +0800, zhuzhenhua wrote:
> to test my deocder program, i want read cp0_performance, is there a
> way to do that in linux?
There is no interface to directly access the performance counter registers
from an application as it is a priviledged CPU resource. You can
however use oprofile's kernel interfaces.
Ralf
prev parent reply other threads:[~2006-03-14 12:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-14 2:56 is there a way to read cp0_performance in user space? zhuzhenhua
2006-03-14 12:41 ` Ralf Baechle [this message]
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