Messages in this thread | | | Date | Sun, 28 Mar 2004 22:02:01 +0200 | From | Andreas Hartmann <> | Subject | Very poor performance with 2.6.4 |
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Hello!
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
Regards, Andreas Hartmann
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