Re: [coLinux-devel] autobuild org.colinux.devel 20080907 12:26:17

[Harald W. <hwe...@gm...>]

Hello,

coLinux autobuild <col...@he...>:

>http://www.henrynestler.com/colinux/autobuild/devel-20080907/
[...]
>Add sysenter / sysexit restoration support
[...]
>If host CPU supports sysenter (SEP), then coLinux kernel will use
>sysenter now. Sysenter is faster as the old Int 0x80.

I updated from Build 20080823 to 20080907 and expected coLinux to
become faster. However, the opposite seems true.

My standard "benchmark" is a compile run of the plain Linux kernel
2.6.18, doing "make clean; make defconfig; time make all". I issued
three runs each. Here are the results (real/user/sys min:sec):

coLinux Snapshot 20080823
1. 6:17 / 4:25 / 1:51
2. 6:15 / 4:28 / 1:49
3. 6:14 / 4:26 / 1:45

coLinux Snapshot 20080907
1. 6:30 / 4:26 / 2:03
2. 6:32 / 4:26 / 2:04
3. 6:30 / 4:28 / 2:01

Building the Linux kernel is mainly a CPU and memory intensive task;
however, there are also many small files created and removed, which
invokes syscalls.

The host machine has an Intel Core2 Duo 6400 processor at 2.13 GHz
and 2 GB of RAM, running an (otherwise unloaded) Windows XP Professional
SP 3. coLinux has 512 MB of memory and runs Debian 4.0r4 with the
kernel shipped with coLinux.

Regards,
Harald