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| author | Jason Yeh <jason.yeh@amd.com> | 2008-07-23 23:05:53 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-26 11:48:16 +0200 |
| commit | 1a960b402a51d80abf54e3f8e4972374ffe5f22d (patch) | |
| tree | 108222afe94df145e7a71f44bb077067c35f0131 /drivers/oprofile/oprof.h | |
| parent | 6852fd9b86d05063c6ef49d2e12e061cc7f6a105 (diff) | |
| download | linux-1a960b402a51d80abf54e3f8e4972374ffe5f22d.tar.gz | |
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.h | 4 |
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; extern struct oprofile_operations oprofile_ops; extern unsigned long oprofile_started; extern unsigned long backtrace_depth; - +extern unsigned long timeout_jiffies; + struct super_block; struct dentry; @@ -35,5 +36,6 @@ void oprofile_create_files(struct super_block * sb, struct dentry * root); void oprofile_timer_init(struct oprofile_operations * ops); int oprofile_set_backtrace(unsigned long depth); +int oprofile_set_timeout(unsigned long time); #endif /* OPROF_H */ |