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authorJason Yeh <jason.yeh@amd.com>2008-07-23 17:05:53 -0400
committerIngo Molnar <mingo@elte.hu>2008-07-26 05:48:16 -0400
commit1a960b402a51d80abf54e3f8e4972374ffe5f22d (patch)
tree108222afe94df145e7a71f44bb077067c35f0131 /drivers/oprofile/oprof.h
parent6852fd9b86d05063c6ef49d2e12e061cc7f6a105 (diff)
Oprofile Multiplexing Patch
This patch introduces multiplexing support for the Oprofile kernel module. It basically adds a new function pointer in oprofile_operator allowing each architecture to supply its callback to switch between different sets of event when the timer expires. Userspace tools can modify the time slice through /dev/oprofile/time_slice. It also modifies the number of counters exposed to the userspace through /dev/oprofile. For example, the number of counters for AMD CPUs are changed to 32 and multiplexed in the sets of 4. Signed-off-by: Jason Yeh <jason.yeh@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/oprofile/oprof.h')
-rw-r--r--drivers/oprofile/oprof.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h
index 18323650806e..c4406a7366bb 100644
--- a/drivers/oprofile/oprof.h
+++ b/drivers/oprofile/oprof.h
@@ -27,7 +27,8 @@ extern unsigned long fs_buffer_watershed;
27extern struct oprofile_operations oprofile_ops; 27extern struct oprofile_operations oprofile_ops;
28extern unsigned long oprofile_started; 28extern unsigned long oprofile_started;
29extern unsigned long backtrace_depth; 29extern unsigned long backtrace_depth;
30 30extern unsigned long timeout_jiffies;
31
31struct super_block; 32struct super_block;
32struct dentry; 33struct dentry;
33 34
@@ -35,5 +36,6 @@ void oprofile_create_files(struct super_block * sb, struct dentry * root);
35void oprofile_timer_init(struct oprofile_operations * ops); 36void oprofile_timer_init(struct oprofile_operations * ops);
36 37
37int oprofile_set_backtrace(unsigned long depth); 38int oprofile_set_backtrace(unsigned long depth);
39int oprofile_set_timeout(unsigned long time);
38 40
39#endif /* OPROF_H */ 41#endif /* OPROF_H */