From: Dan Malek <dan@embeddededge.com>
To: <Joakim.Tjernlund@lumentis.se>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: [26-devel] v2.6 performance slowdown on MPC8xx: Measuring TLB cache misses
Date: Sat, 23 Apr 2005 18:09:11 -0400 [thread overview]
Message-ID: <566734ff0041d23c5457afc51958ddcf@embeddededge.com> (raw)
In-Reply-To: <BCEFJBPJCGFCNMMMIDBHGEIJCLAA.Joakim.Tjernlund@lumentis.se>
On Apr 23, 2005, at 5:51 PM, Joakim Tjernlund wrote:
> Well, every instruction counts. I this case we would have saved
> 2 in ITLB Miss, 3 in DTLB Miss and a cache line write in both.
You have already read the PTE and instructions into the cache,
there are no branches, but not a big deal.
> Would be nice to do away with the kernel space test, but thats a lot
> harder.
With some clever first level pointer page creation and management
we could do this, but it would be custom 8xx code in generic files.
Thanks.
-- Dan
next prev parent reply other threads:[~2005-04-23 22:09 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-23 17:23 [26-devel] v2.6 performance slowdown on MPC8xx: Measuring TLB cache misses Joakim Tjernlund
2005-04-23 12:42 ` Marcelo Tosatti
2005-04-23 21:31 ` Joakim Tjernlund
2005-04-23 21:32 ` Dan Malek
2005-04-23 21:55 ` Joakim Tjernlund
2005-04-23 22:12 ` Dan Malek
2005-04-23 17:35 ` Joakim Tjernlund
2005-04-23 21:29 ` Dan Malek
2005-04-23 21:51 ` Joakim Tjernlund
2005-04-23 22:09 ` Dan Malek [this message]
2005-04-23 23:12 ` Dan Malek
2005-04-23 23:51 ` Joakim Tjernlund
2005-04-24 0:00 ` Dan Malek
2005-04-24 16:55 ` Marcelo Tosatti
2005-04-25 9:57 ` Joakim Tjernlund
2005-05-07 18:10 ` Joakim Tjernlund
2005-05-07 14:42 ` Marcelo Tosatti
2005-05-07 20:24 ` Dan Malek
-- strict thread matches above, loose matches on Subject: below --
2005-04-21 18:32 Marcelo Tosatti
2005-04-21 18:50 ` [26-devel] " Marcelo Tosatti
2005-04-22 6:18 ` Pantelis Antoniou
2005-04-22 15:39 ` Marcelo Tosatti
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