From: Andrew Cagney <ac131313@redhat.com>
To: Daniel Jacobowitz <drow@mvista.com>
Cc: gdb@sources.redhat.com
Subject: Re: Known problems with dcache?
Date: Sat, 11 Jan 2003 17:52:00 -0000 [thread overview]
Message-ID: <3E2059C1.5080900@redhat.com> (raw)
In-Reply-To: <20030110232212.GA307@nevyn.them.org>
> 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
prev parent reply other threads:[~2003-01-11 17:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-10 22:19 Andrew Cagney
2003-01-10 22:25 ` Daniel Jacobowitz
2003-01-10 22:36 ` Andrew Cagney
2003-01-10 22:38 ` Daniel Jacobowitz
2003-01-10 22:55 ` Andrew Cagney
2003-01-10 23:04 ` Daniel Jacobowitz
2003-01-10 23:16 ` Andrew Cagney
2003-01-10 23:21 ` Daniel Jacobowitz
2003-01-11 17:52 ` Andrew Cagney [this message]
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