On 22.01.2008 22:51, Bruce Rogers wrote:
[...]
I believe SAP is doing some broad based testing of their own which may help
identify how much the hardware has to do with the performance of this test.
We are currently testing the patched kernels we got from Red Hat and
Novell with several Intel Tigerton (Quad Socket, Quad Core, shared L2
Cache @ 2.93GHz) machines. I can't say for sure, if we'll have AMD too.
It'll take a week until I can provide exact results.
Thanks,
Hannes
What results do you get with native (non-smp) on that same hardware? Have you
done runs on other hardware and seen consistent results?
- Bruce
On 1/22/2008 at 11:55 AM, in message
<20080122135534.1225627e@xxxxxxxxxxxxxxxxxxxxxx>, Rik van Riel
<riel@xxxxxxxxxx> wrote:
On Mon, 21 Jan 2008 10:41:59 -0500
Rik van Riel <riel@xxxxxxxxxx> wrote:
I tested a quick backport of these patches to XEN 3.1.2 and
kernel 2.6.18.
Unfortunately, performance and scalability do not seem to
have improved with these patches,
OK, it turned out the guys with the SAP mprotect benchmark program
made the mistake of only upgrading the dom0 kernel and not the guest.
With both dom0 and guest, mprotect performance has improved slightly
on our dual cpu, dual core (4 cores total) Intel x86-64 test system:
CPULOAD WITH
STREAMS PATCH STANDARD
1 13108.77 11188.68
2 13135.63 11146.06
3 10522.82 9910.10
4 8622.47 9399.66
6 6571.49 7078.12
8 5141.23 5389.15
10 4514.37 4372.87
12 4226.79 3802.98
So we have about a 10-15% performance improvement at some numbers of
streams, and a performance decrease at some other numbers of streams.
Over-all performance impact of the patch seems to be about even :(
I wonder if this is just an artifact of the system we tested this on,
or if it can be seen across multiple systems.
Bruce, what kinds of systems have you tested the patch on and what
kind of performance numbers are you seeing?
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
--
* Hannes Kuehnemund
* SAP LinuxLab
* SAP AG
* Dietmar Hopp Allee 16
* 69190 Walldorf, Germany
T +49 6227 7-40615
F +49 6227 78-34584
mailto: hannes.kuehnemund@xxxxxxx
http://www.sap.com
Sitz der Gesellschaft/Registered Office: Walldorf, Germany
Vorstand/SAP Executive Board: Henning Kagermann (Sprecher/CEO),
Léo Apotheker (stellvertretender Sprecher/Deputy CEO),
Werner Brandt, Claus Heinrich, Gerhard Oswald, Peter Zencke
Vorsitzender des Aufsichtsrats/Chairperson of the SAP
Supervisory Board: Hasso Plattner
Registergericht/Commercial Register Mannheim No HRB 350269
Diese E-Mail kann Betriebs- oder Geschäftsgeheimnisse oder
sonstige vertrauliche Informationen enthalten. Sollten Sie
diese E-Mail irrtümlich erhalten haben, ist Ihnen eine
Kenntnisnahme des Inhalts, eine Vervielfältigung oder
Weitergabe der E-Mail ausdrücklich untersagt. Bitte
benachrichtigen Sie uns und vernichten Sie die empfangene
E-Mail. Vielen Dank.
This e-mail may contain trade secrets or privileged,
undisclosed, or otherwise confidential information. If you have
received this e-mail in error, you are hereby notified that any
review, copying, or distribution of it is strictly prohibited.
Please inform us immediately and destroy the original
transmittal. Thank you for your cooperation.
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home