The multi-core scalability issue with BIOS v1008

SBJ: The multi-core scalability issue with BIOS v1008:

After update BIOS from v.1007 to v.1008, the speed of heavily threaded
applications, gets slower around ~ 1.48 times. All 4 cores are loaded
only 55-70% comparatively to 90% with BIOS v1007. After flash back to
BIOS v.1007 the speed gets normal as it was. This test has been
performed extensively multiple times; the result is the same; v.1008
kills the multi-core scalability to the ground.

On Wed, 17 May 2006 09:16:13 -0700, stefanbanev wrote:

SBJ: The multi-core scalability issue with BIOS v1008:

After update BIOS from v.1007 to v.1008, the speed of heavily threaded
applications, gets slower around ~ 1.48 times. All 4 cores are loaded only
55-70% comparatively to 90% with BIOS v1007. After flash back to BIOS
v.1007 the speed gets normal as it was. This test has been performed
extensively multiple times; the result is the same; v.1008 kills the
multi-core scalability to the ground.

What motherboard are you using?. which OS?, if you are using Linux which
kernel?. This post is pointless without that information.

General Schvantzkoph wrote:
On Wed, 17 May 2006 09:16:13 -0700, stefanbanev wrote:

SBJ: The multi-core scalability issue with BIOS v1008:


After update BIOS from v.1007 to v.1008, the speed of heavily threaded
applications, gets slower around ~ 1.48 times. All 4 cores are loaded only
55-70% comparatively to 90% with BIOS v1007. After flash back to BIOS
v.1007 the speed gets normal as it was. This test has been performed
extensively multiple times; the result is the same; v.1008 kills the
multi-core scalability to the ground.

What motherboard are you using?. which OS?, if you are using Linux which
kernel?. This post is pointless without that information.



MB ASUS K8N-DL rev 1.03
2 X socket 940 (dual Opteron 280)
CPU Speed : 2.4GHz

Memory Vendor : Corsair
*Memory Model : CM72SD1024RLP-3200 (X4)
*Memory Capacity : 4GB (A1B1A3B3)

HDD Vendor : Western Digital
HDD Model : WD2500YD (X2)
HDD Capacity : 250GB (X2 RAID0)

Operating System : WinXP

On Wed, 17 May 2006 10:08:01 -0700, stefanbanev wrote:


General Schvantzkoph wrote:
On Wed, 17 May 2006 09:16:13 -0700, stefanbanev wrote:

SBJ: The multi-core scalability issue with BIOS v1008:


After update BIOS from v.1007 to v.1008, the speed of heavily threaded
applications, gets slower around ~ 1.48 times. All 4 cores are loaded
only 55-70% comparatively to 90% with BIOS v1007. After flash back to
BIOS v.1007 the speed gets normal as it was. This test has been
performed extensively multiple times; the result is the same; v.1008
kills the multi-core scalability to the ground.

What motherboard are you using?. which OS?, if you are using Linux which
kernel?. This post is pointless without that information.



MB ASUS K8N-DL rev 1.03
2 X socket 940 (dual Opteron 280)
CPU Speed : 2.4GHz

Memory Vendor : Corsair
*Memory Model : CM72SD1024RLP-3200 (X4) *Memory Capacity : 4GB (A1B1A3B3)

HDD Vendor : Western Digital
HDD Model : WD2500YD (X2)
HDD Capacity : 250GB (X2 RAID0)

Operating System : WinXP

Multitasking is handled by the OS, I can't think of how the BIOS could
effect it. However power management is handled by the BIOS and that would
effect performance. I don't don't know much about XP but I think that
there is a control panel that controls the performance mode. Make sure all
of the cores are running at full speed.

June issue of Maximum PC Lists all the fixes you need to do for dual core.
If you foolishly installed the cool and quiet driver to cause your self even
more problems, go to AMDzone.com to get the fix for that. Then you have to
create a registry key to enable it(described in full in the mag.). AMD also
has a patch at http://www.amd.com/us-en/assets/cont...ies/amdcpu.exe.
Plus the normal affinity stuff.

--
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SBJ: The multi-core scalability issue with BIOS v1008:

After update BIOS from v.1007 to v.1008, the speed of heavily threaded
applications, gets slower around ~ 1.48 times. All 4 cores are loaded
only 55-70% comparatively to 90% with BIOS v1007. After flash back to
BIOS v.1007 the speed gets normal as it was. This test has been
performed extensively multiple times; the result is the same; v.1008
kills the multi-core scalability to the ground.