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authorBrian King <brking@linux.vnet.ibm.com>2008-07-24 04:30:58 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-25 15:44:42 +1000
commitffa5abbd0c399b32fc13a1b4718d87ee7a716999 (patch)
tree79e2136b4de01bee9c5f8f8cee23823a801b8972
parent84af458bb23bf5f0ba1af4320dd2a57f7c4363e5 (diff)
downloadop-kernel-dev-ffa5abbd0c399b32fc13a1b4718d87ee7a716999.zip
op-kernel-dev-ffa5abbd0c399b32fc13a1b4718d87ee7a716999.tar.gz
powerpc/pseries: Add CMO paging statistics
With the addition of Cooperative Memory Overcommitment (CMO) support for IBM Power Systems, two fields have been added to the VPA to report paging statistics. Add support in lparcfg to report them to userspace. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-rw-r--r--arch/powerpc/kernel/lparcfg.c20
-rw-r--r--include/asm-powerpc/lppaca.h5
2 files changed, 24 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index d82e1fa..848c3e5 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -409,6 +409,25 @@ static int lparcfg_count_active_processors(void)
return count;
}
+static void pseries_cmo_data(struct seq_file *m)
+{
+ int cpu;
+ unsigned long cmo_faults = 0;
+ unsigned long cmo_fault_time = 0;
+
+ if (!firmware_has_feature(FW_FEATURE_CMO))
+ return;
+
+ for_each_possible_cpu(cpu) {
+ cmo_faults += lppaca[cpu].cmo_faults;
+ cmo_fault_time += lppaca[cpu].cmo_fault_time;
+ }
+
+ seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
+ seq_printf(m, "cmo_fault_time_usec=%lu\n",
+ cmo_fault_time / tb_ticks_per_usec);
+}
+
static int pseries_lparcfg_data(struct seq_file *m, void *v)
{
int partition_potential_processors;
@@ -434,6 +453,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
parse_system_parameter_string(m);
parse_ppp_data(m);
parse_mpp_data(m);
+ pseries_cmo_data(m);
seq_printf(m, "purr=%ld\n", get_purr());
} else { /* non SPLPAR case */
diff --git a/include/asm-powerpc/lppaca.h b/include/asm-powerpc/lppaca.h
index 567ed92..2fe268b 100644
--- a/include/asm-powerpc/lppaca.h
+++ b/include/asm-powerpc/lppaca.h
@@ -125,7 +125,10 @@ 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
- u8 reserved6[124]; // Reserved x04-x7F
+ u32 reserved6;
+ 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
//=============================================================================
// CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data
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