From f13ef7754f724842dbf5ae6d85d0604fff0d1a84 Mon Sep 17 00:00:00 2001 From: Ravikiran G Thirumalai Date: Tue, 16 Oct 2007 23:26:28 -0700 Subject: [PATCH] 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 Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: "Luck, Tony" Cc: Richard Henderson Cc: Ivan Kokshaysky Acked-by: Linus Torvalds Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/proc/proc_misc.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c index 5de7f874d95c..d6dc72c78bc1 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" -- 2.20.1