.GK22961@holomorphy.com> <1025125214.1911.40.camel@localhost.localdomain> <1
025128477.1144.3.camel@icbm>
<20020627005431.GM22961@holomorphy.com> <1025192465.1084.3.camel@icbm>
<20020627154712.GO22961@holomorphy.com> <3D1B5982.60008@PolesApart.dhs.org>
<1025202738.1084.12.camel@icbm> <3D1B5F1D.2000706@PolesApart.wox.org>
<3D1B7005.2090200@tmsusa.com> <3D1B7440.3040605@PolesApart.wox.org>
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
X-Mailer: Ximian Evolution 1.0.3 (1.0.3-6)
Date: 27 Jun 2002 16:35:46 -0400
Message-Id: <1025210179.1080.22.camel@icbm>
Mime-Version: 1.0
On Thu, 2002-06-27 at 16:23, Alexandre P. Nunes wrote:
> It seems that the version of O(1) scheduler on 2.4.19-pre10-ac2 is not
> perfect (see below), but I asked because it gave me overall performance
> gains, specially in multithreading programs (and now I'm going to try
> with ngpt 2.00). At least that is the first impression, I'm trying it
> for a few days.
Alan has some patches queued and I will continue to send him updates as
we get them into 2.5 and they prove stable.
I also will update my 2.4 O(1) scheduler patches when I return from
OLS. This would allow a 2.4-ac vs 2.4-O(1) test.
> I said "not perfect" because a rather non-important benchmarking called
> quake 3 seens a lot worse in pre10-ac2 with preemptive patches when
> compared against -pre10 with preemptive patches: sound and screen popped
> sometimes, like if there was a background task borrowing some cpu, which
> was not the case, I mean, no other background tasks compared with
> testing against -pre10. That was the only exception to the above
> paragraph that I can remember of.
There is some "rudeness" in the current O(1) scheduler code in 2.4-ac
that could result in poor latency under certain workloads.
The patch should be in a near future 2.4-ac although I will need to
update the preempt-kernel patch to take advantage of it.
Robert Love
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Jun 30 2002 - 22:00:12 EST