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Add two timestamps to measure PSCI cache flush overhead

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Testing showed that the time spent in a cluster power down
operation is dominated by cache flushes.  Add two more timestamps
in runtime instrumentation to keep track of the time spent
flushing the L1/L2 caches.

Change-Id: I4c5a04e7663543225a85d3c6b271d7b706deffc4
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
This commit is contained in:
dp-arm 2016-11-15 13:25:30 +00:00
parent 1b5fa6ef10
commit 7941816a34
3 changed files with 37 additions and 1 deletions
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4
include/lib/runtime_instr.h
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@ -31,11 +31,13 @@
#ifndef __RUNTIME_INSTR_H__
#define __RUNTIME_INSTR_H__
#define RT_INSTR_TOTAL_IDS 4
#define RT_INSTR_ENTER_PSCI 0
#define RT_INSTR_EXIT_PSCI 1
#define RT_INSTR_ENTER_HW_LOW_PWR 2
#define RT_INSTR_EXIT_HW_LOW_PWR 3
#define RT_INSTR_ENTER_CFLUSH 4
#define RT_INSTR_EXIT_CFLUSH 5
#define RT_INSTR_TOTAL_IDS 6
#ifndef __ASSEMBLY__
PMF_DECLARE_CAPTURE_TIMESTAMP(rt_instr_svc)