From: Like Xu <likexu@xxxxxxxxxxx>
AMD and Intel do not share the same set of coding rules for performance
events, and code to test the same performance event can be reused by
pointing to a different coding table, noting that the table size also
needs to be updated.
Signed-off-by: Like Xu <likexu@xxxxxxxxxxx>
---
x86/pmu.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/x86/pmu.c b/x86/pmu.c
index daeb7a2..24d015e 100644
--- a/x86/pmu.c
+++ b/x86/pmu.c
@@ -30,7 +30,7 @@ struct pmu_event {
uint32_t unit_sel;
int min;
int max;
-} gp_events[] = {
+} intel_gp_events[] = {
{"core cycles", 0x003c, 1*N, 50*N},
{"instructions", 0x00c0, 10*N, 10.2*N},
{"ref cycles", 0x013c, 1*N, 30*N},
@@ -46,6 +46,9 @@ struct pmu_event {
char *buf;
+static struct pmu_event *gp_events;
+static unsigned int gp_events_size;
+
static inline void loop(void)
{
unsigned long tmp, tmp2, tmp3;
@@ -91,7 +94,7 @@ static struct pmu_event* get_counter_event(pmu_counter_t *cnt)
if (is_gp(cnt)) {
int i;
- for (i = 0; i < sizeof(gp_events)/sizeof(gp_events[0]); i++)
+ for (i = 0; i < gp_events_size; i++)
if (gp_events[i].unit_sel == (cnt->config & 0xffff))
return &gp_events[i];
} else
@@ -212,7 +215,7 @@ static void check_gp_counters(void)
{
int i;
- for (i = 0; i < sizeof(gp_events)/sizeof(gp_events[0]); i++)
+ for (i = 0; i < gp_events_size; i++)
if (pmu_gp_counter_is_available(i))
check_gp_counter(&gp_events[i]);
else
@@ -248,7 +251,7 @@ static void check_counters_many(void)
cnt[n].ctr = gp_counter_msr(n);
cnt[n].config = EVNTSEL_OS | EVNTSEL_USR |
- gp_events[i % ARRAY_SIZE(gp_events)].unit_sel;
+ gp_events[i % gp_events_size].unit_sel;
n++;
}
for (i = 0; i < nr_fixed_counters; i++) {
@@ -603,7 +606,7 @@ static void set_ref_cycle_expectations(void)
{
pmu_counter_t cnt = {
.ctr = MSR_IA32_PERFCTR0,
- .config = EVNTSEL_OS | EVNTSEL_USR | gp_events[2].unit_sel,
+ .config = EVNTSEL_OS | EVNTSEL_USR | intel_gp_events[2].unit_sel,
};
uint64_t tsc_delta;
uint64_t t0, t1, t2, t3;
@@ -639,8 +642,8 @@ static void set_ref_cycle_expectations(void)
if (!tsc_delta)
return;
- gp_events[2].min = (gp_events[2].min * cnt.count) / tsc_delta;
- gp_events[2].max = (gp_events[2].max * cnt.count) / tsc_delta;
+ intel_gp_events[2].min = (intel_gp_events[2].min * cnt.count) / tsc_delta;
+ intel_gp_events[2].max = (intel_gp_events[2].max * cnt.count) / tsc_delta;
}
static void check_invalid_rdpmc_gp(void)
@@ -664,6 +667,8 @@ int main(int ac, char **av)
return report_summary();
}
+ gp_events = (struct pmu_event *)intel_gp_events;
+ gp_events_size = sizeof(intel_gp_events)/sizeof(intel_gp_events[0]);
set_ref_cycle_expectations();
printf("PMU version: %d\n", pmu_version());
--
2.38.1
