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powerpc/pseries: Add dispatch dispersion statistics

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PHYP tells us how often a shared processor dispatch changed physical cpus.
This can highlight performance problems caused by the hypervisor.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard
2009-03-31 20:12:44 +00:00
committed by Paul Mackerras
parent 1f8737aab3
commit 0559f0a761
2 changed files with 17 additions and 1 deletions
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arch/powerpc/include/asm/lppaca.h
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@@ -125,7 +125,7 @@ struct lppaca {
// NOTE: This value will ALWAYS be zero for dedicated processors and
// will NEVER be zero for shared processors (ie, initialized to a 1).
volatile u32 yield_count; // PLIC increments each dispatchx00-x03
u32 reserved6;
volatile u32 dispersion_count; // dispatch changed phys cpu x04-x07
volatile u64 cmo_faults; // CMO page fault count x08-x0F
volatile u64 cmo_fault_time; // CMO page fault time x10-x17
u8 reserved7[104]; // Reserved x18-x7F