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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-05-25 17:39:05 +0200
committerIngo Molnar <mingo@elte.hu>2009-05-25 21:41:12 +0200
commita78ac3258782f3e64cb40beb5990808e1febcc0c (patch)
tree692462a974e4c26bdb7fa7fae727a6b326a0eeee /kernel/sysctl.c
parent48e22d56ecdeddd1ffb42a02fccba5c6ef42b133 (diff)
downloadop-kernel-dev-a78ac3258782f3e64cb40beb5990808e1febcc0c.zip
op-kernel-dev-a78ac3258782f3e64cb40beb5990808e1febcc0c.tar.gz
perf_counter: Generic per counter interrupt throttle
Introduce a generic per counter interrupt throttle. This uses the perf_counter_overflow() quick disable to throttle a specific counter when its going too fast when a pmu->unthrottle() method is provided which can undo the quick disable. Power needs to implement both the quick disable and the unthrottle method. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <20090525153931.703093461@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3cb1849..0c4bf86 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -930,6 +930,14 @@ static struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "perf_counter_int_limit",
+ .data = &sysctl_perf_counter_limit,
+ .maxlen = sizeof(sysctl_perf_counter_limit),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
#endif
/*
* NOTE: do not add new entries to this table unless you have read
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