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authorJason Yeh <jason.yeh@amd.com>2008-07-23 23:05:53 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-26 11:48:16 +0200
commit1a960b402a51d80abf54e3f8e4972374ffe5f22d (patch)
tree108222afe94df145e7a71f44bb077067c35f0131 /arch/x86/oprofile/op_counter.h
parent6852fd9b86d05063c6ef49d2e12e061cc7f6a105 (diff)
downloadlinux-2.6.38-lt-ux500-1a960b402a51d80abf54e3f8e4972374ffe5f22d.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 'arch/x86/oprofile/op_counter.h')
-rw-r--r--arch/x86/oprofile/op_counter.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/oprofile/op_counter.h b/arch/x86/oprofile/op_counter.h
index 2880b15c467..786d6e01cf7 100644
--- a/arch/x86/oprofile/op_counter.h
+++ b/arch/x86/oprofile/op_counter.h
@@ -10,13 +10,14 @@
#ifndef OP_COUNTER_H
#define OP_COUNTER_H
-#define OP_MAX_COUNTER 8
+#define OP_MAX_COUNTER 32
/* Per-perfctr configuration as set via
* oprofilefs.
*/
struct op_counter_config {
unsigned long count;
+ unsigned long save_count_low;
unsigned long enabled;
unsigned long event;
unsigned long kernel;