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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-03-02 16:01:10 +0100
committerRobert Richter <robert.richter@amd.com>2010-03-02 17:03:20 +0100
commitbc078e4eab65f11bbaeed380593ab8151b30d703 (patch)
tree8d61457355fad4e5b5938cd7c01a1dd379778789 /drivers/oprofile/oprof.h
parentcfc9c0b450176a077205ef39092f0dc1a04e020a (diff)
downloadlinux-bc078e4eab65f11bbaeed380593ab8151b30d703.tar.bz2
oprofile: convert oprofile from timer_hook to hrtimer
Oprofile is currently broken on systems running with NOHZ enabled. A maximum of 1 tick is accounted via the timer_hook if a cpu sleeps for a longer period of time. This does bad things to the percentages in the profiler output. To solve this problem convert oprofile to use a restarting hrtimer instead of the timer_hook. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile/oprof.h')
-rw-r--r--drivers/oprofile/oprof.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h
index cb92f5c98c1a..47e12cb4ee8b 100644
--- a/drivers/oprofile/oprof.h
+++ b/drivers/oprofile/oprof.h
@@ -34,7 +34,8 @@ struct super_block;
struct dentry;
void oprofile_create_files(struct super_block *sb, struct dentry *root);
-void oprofile_timer_init(struct oprofile_operations *ops);
+int oprofile_timer_init(struct oprofile_operations *ops);
+void oprofile_timer_exit(void);
int oprofile_set_backtrace(unsigned long depth);
int oprofile_set_timeout(unsigned long time);