Re: Very poor performance with 2.6.4
From: Matt H.
Date: Sun Mar 28 2004 - 15:27:43 EST
Have you tried the -mm tree yet ?
If not you should.
On Sunday 28 March 2004 1:02 pm, Andreas Hartmann wrote:
> I tested kernel 2.6.4. While compiling kdelibs and kdebase, I felt, that
> kernel 2.6 seems to be slower than 2.4.25.
> So I did some tests to compare the performance directly. Therefore I
> rebooted for everey test in init 2 (no X).
> I locally compiled 2.6.5rc2 3 times under 2.6.4 and under 2.4.25 on a
> reiserfs LVM partition, which resides onto a IDE HD (using DMA) and got
> the following result:
> In the middle, compiling under kernel 2.6.4 tooks 9.3% more real time than
> under 2.4.25.
> The user-processortime is about the same, but the system-processortime is
> under 2.6.4 32.9% higher than under 2.4.25.
> Now, I switched off preemption. But the performance isn't much better:
> 8.8% (9.3% with preemption) more real-time compared to 2.4.25 and 28%
> (32.9% with preepmtion) more system-time.
> Does anybody know, how to get the same performance under 2.6.4 (or even
> better) as under 2.4.25?
> My hardware:
> AMD Athlon(tm) XP 2000+
> 00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
> 00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333
> AGP] 00:09.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900
> 10/100 Ethernet (rev 02)
> 00:0c.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev
> 0c) 00:10.0 USB Controller: VIA Technologies, Inc. USB (rev 80)
> 00:10.1 USB Controller: VIA Technologies, Inc. USB (rev 80)
> 00:10.2 USB Controller: VIA Technologies, Inc. USB (rev 80)
> 00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
> 00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
> 00:11.1 IDE interface: VIA Technologies, Inc.
> VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)
> 00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235
> AC97 Audio Controller (rev 50)
> 01:00.0 VGA compatible controller: ATI Technologies Inc Rage 128 PF/PRO
> AGP 4x TMDS
> Andreas Hartmann
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