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Oprofile Multiplexing Patch

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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>
This commit is contained in:
Jason Yeh
2008-07-23 23:05:53 +02:00
committed by Ingo Molnar
parent 6852fd9b86
commit 1a960b402a
10 changed files with 247 additions and 45 deletions
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3
arch/x86/oprofile/op_x86_model.h
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@@ -19,6 +19,7 @@ struct op_saved_msr {
struct op_msr {
unsigned long addr;
struct op_saved_msr saved;
struct op_saved_msr multiplex;
};
struct op_msrs {
@@ -34,6 +35,8 @@ struct pt_regs;
struct op_x86_model_spec {
int (*init)(struct oprofile_operations *ops);
void (*exit)(void);
unsigned int const num_hardware_counters;
unsigned int const num_hardware_controls;
unsigned int const num_counters;
unsigned int const num_controls;
void (*fill_in_addresses)(struct op_msrs * const msrs);