--- Comment #18 from sgk at troutmask dot apl dot washington dot edu
2005-12-09 15:09 ---
Subject: Re: Really, really, horrible IO performance
On Fri, Dec 09, 2005 at 09:24:29AM -, fxcoudert at gcc dot gnu dot org
wrote:
> On this one, we now (due to Janne's array I/O transfer) pe
--- Comment #17 from fxcoudert at gcc dot gnu dot org 2005-12-09 09:24
---
On this one, we now (due to Janne's array I/O transfer) perform better than
Intel and Portland compilers (on i686-linux, ext3 filesystem). I think this can
be closed as dup of 16339. For formatted I/O performance
--- Comment #16 from Tobias dot Schlueter at physik dot uni-muenchen dot de
2005-11-01 22:31 ---
Subject: Re: Really, really, horrible IO performance
jblomqvi at cc dot hut dot fi wrote:
> It depends on what you consider "really, really horrible IO performance". ;-)
> Getting rid of m
--- Comment #15 from jblomqvi at cc dot hut dot fi 2005-11-01 22:09 ---
(In reply to comment #14)
> (In reply to comment #13)
> > The patch from #12 has been committed to mainline.
>
> So should this bug be closed?
>
It depends on what you consider "really, really horrible IO performa
--- Comment #14 from tobi at gcc dot gnu dot org 2005-11-01 21:22 ---
(In reply to comment #13)
> The patch from #12 has been committed to mainline.
So should this bug be closed?
--
tobi at gcc dot gnu dot org changed:
What|Removed |Added
--- Additional Comments From jblomqvi at cc dot hut dot fi 2005-09-11
11:10 ---
The patch from #12 has been committed to mainline.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21820
--- Additional Comments From jblomqvi at cc dot hut dot fi 2005-09-04
09:49 ---
Removing mmap improves performance, patch:
http://gcc.gnu.org/ml/gcc-patches/2005-09/msg00176.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21820
--- Additional Comments From tobi at gcc dot gnu dot org 2005-08-16 19:12
---
I've set this to blocking PR23363, which looks related.
--
What|Removed |Added
OtherBugsDependin
--- Additional Comments From sgk at troutmask dot apl dot washington dot
edu 2005-05-31 16:48 ---
Subject: Re: Really, really, horrible IO performance
On Tue, May 31, 2005 at 07:38:41AM -, fxcoudert at gcc dot gnu dot org
wrote:
> First thing: I can reproduce the timings differenc
--- Additional Comments From fxcoudert at gcc dot gnu dot org 2005-05-31
10:46 ---
Additional info: disabling MMAP (#undefining HAVE_MMAP in unix.c) gives far
better performance (in fact, I can see no performance penatly at all).
Perhaps a survey of the cases where mmap induces performa
--- Additional Comments From fxcoudert at gcc dot gnu dot org 2005-05-31
07:38 ---
First thing: I can reproduce the timings differences on my i386-linux, with ext3
filesystem.
Second thing: Steve, your patch truncates files, which is not correct! Given the
following modified testcase:
--- Additional Comments From sgk at troutmask dot apl dot washington dot
edu 2005-05-30 16:20 ---
Subject: Re: Really, really, horrible IO performance
On Mon, May 30, 2005 at 03:20:18PM -, pinskia at gcc dot gnu dot org wrote:
>
> I see the same thing on powerpc-darwin but it seem
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-30
15:20 ---
I see the same thing on powerpc-darwin but it seems like on freebsd, it is
actually paging in the
memory which seems wrong, I almost want to say you should report it to freebsd
as their performance
bug (
--- Additional Comments From sgk at troutmask dot apl dot washington dot
edu 2005-05-30 15:15 ---
Subject: Re: Really, really, horrible IO performance
On Mon, May 30, 2005 at 03:00:41PM -, pinskia at gcc dot gnu dot org wrote:
>
> > Note, the use of O_TRUNC on replacing a file sho
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-30
15:00 ---
(In reply to comment #3)
> Note, the use of O_TRUNC on replacing a file should
> not hurt performance on other OS's.
On powerpc-darwin I am using HFS+.
Hmm, I think I should drag my firewire drive out and
--- Additional Comments From sgk at troutmask dot apl dot washington dot
edu 2005-05-30 14:58 ---
Subject: Re: Really, really, horrible IO performance
On Mon, May 30, 2005 at 02:49:04PM -, pinskia at gcc dot gnu dot org wrote:
>
> I cannot reproduce this on either powerpc-darwin o
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-30
14:49 ---
I cannot reproduce this on either powerpc-darwin or i686-pc-linux-gnu, what
target are you using?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21820
--- Additional Comments From kargl at gcc dot gnu dot org 2005-05-30 14:33
---
Created an attachment (id=8994)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8994&action=view)
patch to fix problem
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21820
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