Tim Kientzle wrote:
I recall Matt talking about implementing gettimeofday()
without a syscall. The basic idea is to have the kernel
record some constants in a page that's mapped across
all processes, then libc can just read the time from
a known location.
It might be nice to combine this with
Sven Petai wrote:
On Tuesday 09 May 2006 20:35, Julian Elischer wrote:
Sven Petai wrote:
are there any patches that take the gettimeofday() calls and replace
them with something that is cheap
such as only doing every 10th one and just returning the last value ++ 1
uSec for the other ones..
a
David Xu wrote:
On Wednesday 10 May 2006 02:23, Kris Kennaway wrote:
There are at least several issues here:
...This may be general issues like
gettimeofday() on Linux vs FreeBSD; clearly there is something *very
big* to blame here. Mysql does do *lots* of such calls ...
My last recall is t
On Tuesday 09 May 2006 20:35, Julian Elischer wrote:
> Sven Petai wrote:
>
> are there any patches that take the gettimeofday() calls and replace
> them with something that is cheap
> such as only doing every 10th one and just returning the last value ++ 1
> uSec for the other ones..
>
> a ktrace o
On Wednesday 10 May 2006 02:23, Kris Kennaway wrote:
> There are at least several issues here:
>
> * Factor of >two difference in performance across the board (all
> loads) relative to Linux. This may be general issues like
> gettimeofday() on Linux vs FreeBSD; clearly there is something *very
> b
>From Julian Elischer <[EMAIL PROTECTED]>, Tue, May 09, 2006 at 10:35:06AM
>-0700:
> Sven Petai wrote:
>
> are there any patches that take the gettimeofday() calls and replace
> them with something that is cheap
> such as only doing every 10th one and just returning the last value ++ 1
> uSec f
On Tue, May 09, 2006 at 11:13:02AM -0700, Greg 'groggy' Lehey wrote:
> On Monday, 8 May 2006 at 21:11:09 -0400, Kris Kennaway wrote:
> > On Mon, May 08, 2006 at 08:43:28PM -0400, Kris Kennaway wrote:
> >> On Mon, May 08, 2006 at 02:52:07AM -0400, Kris Kennaway wrote:
> >>> OK, David's patch fixes
On Tue, May 09, 2006 at 06:18:11PM +0300, Sven Petai wrote:
> On Tuesday 09 May 2006 03:42, Kris Kennaway wrote:
> > On Tue, May 09, 2006 at 03:34:59AM +0300, Sven Petai wrote:
> > > > Hmm, with this patch mysql 4.1 seems to crash at startup. I haven't
> > > > yet had time to investigate. Is anyo
On Monday, 8 May 2006 at 21:11:09 -0400, Kris Kennaway wrote:
> On Mon, May 08, 2006 at 08:43:28PM -0400, Kris Kennaway wrote:
>> On Mon, May 08, 2006 at 02:52:07AM -0400, Kris Kennaway wrote:
>>> OK, David's patch fixes the umtx thundering herd (and seems to give a
>>> 4-6% boost). I also fixed
Julian Elischer wrote:
are there any patches that take the gettimeofday() calls and replace
them with something that is cheap
such as only doing every 10th one and just returning the last value
++ 1
uSec for the other ones..
a ktrace of Mysql shows a LOT of gettimeofday() calls.
Yes there ar
On Tue, 9 May 2006, 10:35-0700, Julian Elischer wrote:
> Sven Petai wrote:
>
> are there any patches that take the gettimeofday() calls and replace
> them with something that is cheap such as only doing every 10th one
> and just returning the last value ++ 1 uSec for the other ones..
>
> a ktrace
Sven Petai wrote:
are there any patches that take the gettimeofday() calls and replace
them with something that is cheap
such as only doing every 10th one and just returning the last value ++ 1
uSec for the other ones..
a ktrace of Mysql shows a LOT of gettimeofday() calls.
On Tuesday 09 M
On Tuesday 09 May 2006 03:42, Kris Kennaway wrote:
> On Tue, May 09, 2006 at 03:34:59AM +0300, Sven Petai wrote:
> > > Hmm, with this patch mysql 4.1 seems to crash at startup. I haven't
> > > yet had time to investigate. Is anyone else seeing this?
> >
> > Seems to run fine here with 4.1.18 on a
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