Re: Known problems with dcache?

Andrew Cagney
2003-01-11T17:52:17Z

> On Fri, Jan 10, 2003 at 06:15:55PM -0500, Andrew Cagney wrote:
>
>>
>
>> >>Was it on an i386? If it was, the other other cache would easily skew
>> >>any results.
>
>> >
>> >
>> >Other other cache? Codestream doesn't affect this so I don't know what
>> >you mean.
>
>>
>> It definitly affects things. Both codestream and dcache are chewing cpu
>> cycles trying to cache instruction reads. A valid comparison would at
>> least involve no dcache/codestream.
>
>
> Sure; but it's overwhelmed by the LinuxThreads I/O, which doesn't touch
> codestream at all; instruction reads weren't even a measurable time
> last time I did this.

Clearly another factor to preclude when establishing the baseline. The
base comparison is dcache vs codestream vs nothing, a potential
secondary effect is with the thread code.

Andrew