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authorAnton Blanchard <anton@samba.org>2009-03-31 16:12:44 -0400
committerPaul Mackerras <paulus@samba.org>2009-04-07 01:18:59 -0400
commit0559f0a7611bdd336b7297dce179f793b565f148 (patch)
tree9236baea733c3a4f27036988ec16fba8f0ca3897 /arch
parent1f8737aab39e15684bf6b6b53586b7c89a269f79 (diff)
powerpc/pseries: Add dispatch dispersion statistics
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/lppaca.h2
-rw-r--r--arch/powerpc/kernel/lparcfg.c16
2 files changed, 17 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/lppaca.h b/arch/powerpc/include/asm/lppaca.h
index 68235f7e4a8f..d2a65e8ca6ae 100644
--- a/arch/powerpc/include/asm/lppaca.h
+++ b/arch/powerpc/include/asm/lppaca.h
@@ -125,7 +125,7 @@ struct lppaca {
125 // NOTE: This value will ALWAYS be zero for dedicated processors and 125 // NOTE: This value will ALWAYS be zero for dedicated processors and
126 // will NEVER be zero for shared processors (ie, initialized to a 1). 126 // will NEVER be zero for shared processors (ie, initialized to a 1).
127 volatile u32 yield_count; // PLIC increments each dispatchx00-x03 127 volatile u32 yield_count; // PLIC increments each dispatchx00-x03
128 u32 reserved6; 128 volatile u32 dispersion_count; // dispatch changed phys cpu x04-x07
129 volatile u64 cmo_faults; // CMO page fault count x08-x0F 129 volatile u64 cmo_faults; // CMO page fault count x08-x0F
130 volatile u64 cmo_fault_time; // CMO page fault time x10-x17 130 volatile u64 cmo_fault_time; // CMO page fault time x10-x17
131 u8 reserved7[104]; // Reserved x18-x7F 131 u8 reserved7[104]; // Reserved x18-x7F
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 182e0f642f36..78b3f7840ade 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -434,6 +434,21 @@ static void pseries_cmo_data(struct seq_file *m)
434 seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size()); 434 seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
435} 435}
436 436
437static void splpar_dispatch_data(struct seq_file *m)
438{
439 int cpu;
440 unsigned long dispatches = 0;
441 unsigned long dispatch_dispersions = 0;
442
443 for_each_possible_cpu(cpu) {
444 dispatches += lppaca[cpu].yield_count;
445 dispatch_dispersions += lppaca[cpu].dispersion_count;
446 }
447
448 seq_printf(m, "dispatches=%lu\n", dispatches);
449 seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
450}
451
437static int pseries_lparcfg_data(struct seq_file *m, void *v) 452static int pseries_lparcfg_data(struct seq_file *m, void *v)
438{ 453{
439 int partition_potential_processors; 454 int partition_potential_processors;
@@ -460,6 +475,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
460 parse_ppp_data(m); 475 parse_ppp_data(m);
461 parse_mpp_data(m); 476 parse_mpp_data(m);
462 pseries_cmo_data(m); 477 pseries_cmo_data(m);
478 splpar_dispatch_data(m);
463 479
464 seq_printf(m, "purr=%ld\n", get_purr()); 480 seq_printf(m, "purr=%ld\n", get_purr());
465 } else { /* non SPLPAR case */ 481 } else { /* non SPLPAR case */