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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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2
arch/x86/oprofile/op_model_ppro.c
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@@ -183,6 +183,8 @@ static void ppro_shutdown(struct op_msrs const * const msrs)
struct op_x86_model_spec const op_ppro_spec = {
.num_counters = NUM_COUNTERS,
.num_controls = NUM_CONTROLS,
.num_hardware_counters = NUM_COUNTERS,
.num_hardware_controls = NUM_CONTROLS,
.fill_in_addresses = &ppro_fill_in_addresses,
.setup_ctrs = &ppro_setup_ctrs,
.check_ctrs = &ppro_check_ctrs,