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| author | Ravikiran G Thirumalai <kiran@scalex86.org> | 2007-10-16 23:26:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:49 -0700 |
| commit | f13ef7754f724842dbf5ae6d85d0604fff0d1a84 (patch) | |
| tree | cb2b9d5b9bbe9650df9c8a14871302dd6a5e3193 /fs/proc/proc_misc.c | |
| parent | af49d9248fca6f26cbdb01918334f71d9040df80 (diff) | |
| download | op-kernel-dev-f13ef7754f724842dbf5ae6d85d0604fff0d1a84.zip op-kernel-dev-f13ef7754f724842dbf5ae6d85d0604fff0d1a84.tar.gz | |
report the per-irq statistics on all arches
Commit 4004c69ad68dd03733179277280ea2946990ba36 avoids too many remote cpu
references while reporting per-irq stats. Since we will not have the same
performance penalty of bringing in remote cpu cachelines while reporting
per-irq stats anymore, we can now afford to be consistent and report this
statistic on all arches, all configs.
akpm: affects ia64, alpha and ppc64, mainly.
Kiran earlier said:
Read to /proc/stat takes:
Plain: 2.622832
With speedup patch: 0.013194
With the per-irq stats commented out: 0.008124
So the performance problems which originally caused those architectures to
disable this statistic should now be fixed up.
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/proc_misc.c')
| -rw-r--r-- | fs/proc/proc_misc.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c index 5de7f87..d6dc72c 100644 --- a/fs/proc/proc_misc.c +++ b/fs/proc/proc_misc.c @@ -526,11 +526,8 @@ static int show_stat(struct seq_file *p, void *v) } seq_printf(p, "intr %llu", (unsigned long long)sum); -#ifndef CONFIG_SMP - /* Touches too many cache lines on SMP setups */ for (i = 0; i < NR_IRQS; i++) seq_printf(p, " %u", per_irq_sum[i]); -#endif seq_printf(p, "\nctxt %llu\n" |
