Re: 2.6.8.1-mm3
From: Jesse Barnes
Date: Fri Aug 20 2004 - 11:59:54 EST
On Friday, August 20, 2004 11:44 am, Jesse Barnes wrote:
> On Friday, August 20, 2004 6:19 am, Andrew Morton wrote:
> > - This is (very) lightly tested. Mainly a resync with various parties.
>
> Woo-hoo! This boots *without changes* on a 512p Altix! Now to re-run the
> profiles and try wli's new per-cpu profiling buffers.
I applied wli's per-cpu profiling patch, added some tweaks that he and I
discussed on irc and things look pretty good. We can now profile all 512
CPUs in the system w/o livelocking :)
Here's the output part way through a kernbench run:
[root@ascender root]# time readprofile -m System.map-2.6.8.1-mm3 | sort -nr |
head -20
62551761 total 9.6980
27173178 default_idle 70763.4844
27081955 ia64_pal_call_static 141051.8490
3175264 ia64_load_scratch_fpregs 49613.5000
3166434 ia64_save_scratch_fpregs 49475.5312
1603765 ia64_spinlock_contention 16705.8854
135010 rcu_check_quiescent_state 351.5885
11457 del_timer_sync 22.3770
10003 clear_page_tables 7.6242
9948 memset 9.4205
7845 copy_page 30.6445
7652 __d_lookup 8.5402
7379 clear_page 46.1187
7177 zap_pte_range 3.7380
6044 __copy_user 2.5873
5168 file_move 23.0714
4611 xfs_ilock 9.0059
4230 atomic_dec_and_lock 16.5234
4035 finish_task_switch 14.0104
3938 file_kill 17.5804
real 1m32.554s
user 0m0.215s
sys 1m32.375s
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