45 lines
1.3 KiB
Diff
45 lines
1.3 KiB
Diff
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From 718561bc79c095909f0c9d3fb2f0c1c163478b1e Mon Sep 17 00:00:00 2001
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From: Petr Holasek <pholasek@redhat.com>
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Date: Mon, 20 Feb 2012 16:59:05 +0100
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Subject: [PATCH 3/8] When IRQBALANCE_BANNED_CPUS is set, /proc/stat is not
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parsed properly.
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proc stats counts all the cpus in /proc/stat, but compares that number to the
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value in get_cpu_count(), which returns the number of cpus actively being
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balanced. Since that value doesn't include banned cpus, its incorrect. Since
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we don't want to measure the load on banned cpus anyway, just skip those lines
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so cpucount doesn't increment and the count remains equal.
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Signed-off-by: Petr Holasek <pholasek@redhat.com>
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Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
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---
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procinterrupts.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/procinterrupts.c b/procinterrupts.c
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index 4d3b07b..c032caf 100644
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--- a/procinterrupts.c
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+++ b/procinterrupts.c
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@@ -32,6 +32,8 @@
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#define LINESIZE 4096
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+extern cpumask_t banned_cpus;
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+
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static int proc_int_has_msi = 0;
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static int msi_found_in_sysfs = 0;
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@@ -217,6 +219,9 @@ void parse_proc_stat(void)
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cpunr = strtoul(&line[3], NULL, 10);
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+ if (cpu_isset(cpunr, banned_cpus))
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+ continue;
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+
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rc = sscanf(line, "%*s %*d %*d %*d %*d %*d %d %d", &irq_load, &softirq_load);
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if (rc < 2)
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break;
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--
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1.7.11.4
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