All of lore.kernel.org
 help / color / mirror / Atom feed
From: Grant Grundler <grundler@parisc-linux.org>
To: Randolph Chung <randolph@tausq.org>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] 2.6.10-rc1-pa11 profile data
Date: Thu, 11 Nov 2004 11:36:05 -0700	[thread overview]
Message-ID: <20041111183605.GA19327@colo.lackof.org> (raw)
In-Reply-To: <20041111175933.GU15714@tausq.org>

On Thu, Nov 11, 2004 at 09:59:33AM -0800, Randolph Chung wrote:
> sure, we can zero all the call clobbered registers on exit. But not
> having to save all of those pesky floating pointer registers and half a
> dozen general registers should still be a huge win.

Randolph and I talked about this more privately.
In a nutshell, "huge win" is slightly overstating it and we agree
fixing the cache utilization would be a much bigger win.

Randolph thinks we can save 20 load and stores per interrupt
and potential context switches. The thinking is we are saving/restoring
some registers twice and should split the save/restore between
interrupt/trap and context switch code. So if no context switch is
performed, we only save/restore a subset of the registers manually
and the rest are preserved according to the ABI.
Did I get that right?

thanks,
grant
_______________________________________________
parisc-linux mailing list
parisc-linux@lists.parisc-linux.org
http://lists.parisc-linux.org/mailman/listinfo/parisc-linux

  reply	other threads:[~2004-11-11 18:36 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-11-11  7:54 [parisc-linux] 2.6.10-rc1-pa11 profile data Grant Grundler
2004-11-11  8:11 ` Randolph Chung
2004-11-11 17:39   ` Carlos O'Donell
2004-11-11 17:42     ` Randolph Chung
2004-11-11 17:50       ` Matthew Wilcox
2004-11-11 17:59         ` Randolph Chung
2004-11-11 18:36           ` Grant Grundler [this message]
2004-11-11 18:23   ` Joel Soete
2004-11-11 18:51     ` Randolph Chung
2004-11-26 16:59   ` flush_kernel_[di]cache_page question? [WAS: " Joel Soete
2004-11-26 17:13     ` Randolph Chung
2004-11-26 19:02     ` Grant Grundler
2004-11-28 21:01   ` [id]cache meaning? [Was: [parisc-linux] 2.6.10-rc1-pa11 profile data] Joel Soete
2004-11-28 21:13     ` Matthew Wilcox
2004-11-29  1:14       ` Michael S. Zick
2004-11-29  2:00         ` Matthew Wilcox
2004-12-01 17:44   ` More questions " Joel Soete
2004-12-01 17:56     ` Matthew Wilcox
2004-12-01 18:33       ` Joel Soete
2004-12-03 10:24     ` Joel Soete
2004-12-03 15:41       ` Randolph Chung
2004-12-07 14:42         ` Joel Soete
2004-12-03 15:00   ` *lcul and memory granularity question[Was: " Joel Soete
2004-12-03 15:13     ` Matthew Wilcox
2004-11-12  5:29 ` [parisc-linux] 2.6.10-rc1-pa11 profile data Grant Grundler

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20041111183605.GA19327@colo.lackof.org \
    --to=grundler@parisc-linux.org \
    --cc=parisc-linux@lists.parisc-linux.org \
    --cc=randolph@tausq.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.