Re: sys cpu usage
Hello,
Tuesday, August 26, 2008, 20:54:22, Michael Loftis wrote:
> What kernel are you running BTW? And debian version? Kernels prior to 2.6
> didn't do well on high interrupt loads P4, Xeon, and Core2's because of
I'm running 2.6.24.3 on debian etch.
> Someone else mentioned oprofile to profile kernel CPU usage too.
I tried oprofile, but the results are not very clear for me. If I
understand it well, everything which is vmlinux is counted as sys cpu,
right?
bill:~:# opreport | head
CPU: P4 / Xeon with 2 hyper-threads, speed 2992.65 MHz (estimated)
Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000
GLOBAL_POWER_E...|
samples| %|
------------------
142167514 31.3228 vmlinux
97946264 21.5798 mysqld
73468449 16.1868 libc-2.3.6.so
68429064 15.0765 libphp5.so
20384681 4.4912 perl
bill:~:# opreport -l | head -30
warning: /oprofile could not be found.
CPU: P4 / Xeon with 2 hyper-threads, speed 2992.65 MHz (estimated)
Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000
warning: /etc/ld.so.cache is not in a usable binary format.
warning: /usr/lib/locale/locale-archive is not in a usable binary format.
warning: /var/log/rrd/eth0.rrd is not in a usable binary format.
samples % image name app name symbol name
95243636 21.5689 mysqld mysqld (no symbols)
71545755 16.2023 libc-2.3.6.so libc-2.3.6.so (no symbols)
66640228 15.0914 libphp5.so libphp5.so (no symbols)
20330122 4.6040 perl perl (no symbols)
11724900 2.6552 vmlinux vmlinux port_inb
10713862 2.4263 vmlinux vmlinux __copy_user_intel
10572065 2.3942 vmlinux vmlinux __copy_to_user_ll
8592559 1.9459 vmlinux vmlinux system_call
6383308 1.4456 apache-ssl apache-ssl (no symbols)
5983763 1.3551 vmlinux vmlinux kunmap_atomic
5311477 1.2028 vmlinux vmlinux __d_lookup
5127355 1.1611 libz.so.1.2.3 libz.so.1.2.3 (no symbols)
4969862 1.1255 ZendOptimizer.so ZendOptimizer.so (no symbols)
4453856 1.0086 libpthread-2.3.6.so libpthread-2.3.6.so __read_nocancel
4441345 1.0058 oprofiled oprofiled (no symbols)
--
bYE, Marki
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