* is there a way to read cp0_performance in user space?
@ 2006-03-14 2:56 zhuzhenhua
2006-03-14 12:41 ` Ralf Baechle
0 siblings, 1 reply; 2+ messages in thread
From: zhuzhenhua @ 2006-03-14 2:56 UTC (permalink / raw)
To: linux-mips
to test my deocder program, i want read cp0_performance, is there a
way to do that in linux?
Best Regards
Zhuzhenhua
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: is there a way to read cp0_performance in user space?
2006-03-14 2:56 is there a way to read cp0_performance in user space? zhuzhenhua
@ 2006-03-14 12:41 ` Ralf Baechle
0 siblings, 0 replies; 2+ messages in thread
From: Ralf Baechle @ 2006-03-14 12:41 UTC (permalink / raw)
To: zhuzhenhua; +Cc: linux-mips
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
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