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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>
This commit is contained in:
Brian King 2008-07-24 04:30:58 +10:00 committed by Benjamin Herrenschmidt
parent 84af458bb2
commit ffa5abbd0c
2 changed files with 24 additions and 1 deletions
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20
arch/powerpc/kernel/lparcfg.c
View File

@ -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 */

5
include/asm-powerpc/lppaca.h
View File

@ -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