# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1237457328 0
# Node ID 1b27263038b570aadba15b4aaf8a70286e673a4b
# Parent 4b2d8b1c395ad64377f9fc124d806ffa786d280d
xentrace: Add acpi pm tick output to idle tracing
The reason is that tsc stops and it causes the inaccuracy.
And later we can write some scripts based on this patch.
Signed-off-by: Guanqun Lu <guanqun.lu@xxxxxxxxx>
---
tools/xentrace/formats | 4 ++--
xen/arch/x86/acpi/cpu_idle.c | 12 ++++++------
2 files changed, 8 insertions(+), 8 deletions(-)
diff -r 4b2d8b1c395a -r 1b27263038b5 tools/xentrace/formats
--- a/tools/xentrace/formats Thu Mar 19 10:05:01 2009 +0000
+++ b/tools/xentrace/formats Thu Mar 19 10:08:48 2009 +0000
@@ -118,5 +118,5 @@ 0x0040f10f CPU%(cpu)d %(tsc)d (+%(relt
0x0040f10f CPU%(cpu)d %(tsc)d (+%(reltsc)8d) shadow_emulate_resync_only
[ gfn = 0x%(1)16x ]
0x00801001 CPU%(cpu)d %(tsc)d (+%(reltsc)8d) cpu_freq_change [ %(1)dMHz ->
%(2)dMHz ]
-0x00802001 CPU%(cpu)d %(tsc)d (+%(reltsc)8d) cpu_idle_entry [ C0 -> C%(1)d
]
-0x00802002 CPU%(cpu)d %(tsc)d (+%(reltsc)8d) cpu_idle_exit [ C%(1)d -> C0
]
+0x00802001 CPU%(cpu)d %(tsc)d (+%(reltsc)8d) cpu_idle_entry [ C0 ->
C%(1)d, acpi_pm_tick = %(2)d ]
+0x00802002 CPU%(cpu)d %(tsc)d (+%(reltsc)8d) cpu_idle_exit [ C%(1)d ->
C0, acpi_pm_tick = %(2)d ]
diff -r 4b2d8b1c395a -r 1b27263038b5 xen/arch/x86/acpi/cpu_idle.c
--- a/xen/arch/x86/acpi/cpu_idle.c Thu Mar 19 10:05:01 2009 +0000
+++ b/xen/arch/x86/acpi/cpu_idle.c Thu Mar 19 10:08:48 2009 +0000
@@ -245,16 +245,16 @@ static void acpi_processor_idle(void)
case ACPI_STATE_C2:
if ( cx->type == ACPI_STATE_C1 || local_apic_timer_c2_ok )
{
- /* Trace cpu idle entry */
- TRACE_1D(TRC_PM_IDLE_ENTRY, cx->idx);
/* Get start time (ticks) */
t1 = inl(pmtmr_ioport);
+ /* Trace cpu idle entry */
+ TRACE_2D(TRC_PM_IDLE_ENTRY, cx->idx, t1);
/* Invoke C2 */
acpi_idle_do_entry(cx);
/* Get end time (ticks) */
t2 = inl(pmtmr_ioport);
/* Trace cpu idle exit */
- TRACE_1D(TRC_PM_IDLE_EXIT, cx->idx);
+ TRACE_2D(TRC_PM_IDLE_EXIT, cx->idx, t2);
/* Re-enable interrupts */
local_irq_enable();
@@ -293,8 +293,6 @@ static void acpi_processor_idle(void)
ACPI_FLUSH_CPU_CACHE();
}
- /* Trace cpu idle entry */
- TRACE_1D(TRC_PM_IDLE_ENTRY, cx->idx);
/*
* Before invoking C3, be aware that TSC/APIC timer may be
* stopped by H/W. Without carefully handling of TSC/APIC stop issues,
@@ -305,6 +303,8 @@ static void acpi_processor_idle(void)
/* Get start time (ticks) */
t1 = inl(pmtmr_ioport);
+ /* Trace cpu idle entry */
+ TRACE_2D(TRC_PM_IDLE_ENTRY, cx->idx, t1);
/* Invoke C3 */
acpi_idle_do_entry(cx);
/* Get end time (ticks) */
@@ -313,7 +313,7 @@ static void acpi_processor_idle(void)
/* recovering TSC */
cstate_restore_tsc();
/* Trace cpu idle exit */
- TRACE_1D(TRC_PM_IDLE_EXIT, cx->idx);
+ TRACE_2D(TRC_PM_IDLE_EXIT, cx->idx, t2);
if ( power->flags.bm_check && power->flags.bm_control )
{
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