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libpmc: add support for using fixed function counters

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This commit is contained in:
Matt Macy 2018-05-29 04:23:21 +00:00
parent 78beed2f81
commit a191ed2d9f
1 changed files with 39 additions and 3 deletions
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42
lib/libpmc/libpmc_pmu_util.c
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@ -63,6 +63,14 @@ static struct pmu_alias pmu_alias_table[] = {
{ NULL, NULL },
};
static const char *fixed_mode_cntrs[] = {
"inst_retired.any",
"cpu_clk_unhalted.thread",
"cpu_clk_unhalted.thread_any",
"cpu_clk_unhalted.ref_tsc",
NULL
};
static const char *
pmu_alias_get(const char *name)
{
@ -288,11 +296,15 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)
const struct pmu_event *pe;
struct pmu_event_desc ped;
struct pmc_md_iap_op_pmcallocate *iap;
int idx;
struct pmc_md_iaf_op_pmcallocate *iaf;
int idx, isfixed;
iap = &pm->pm_md.pm_iap;
iaf = &pm->pm_md.pm_iaf;
isfixed = 0;
bzero(iap, sizeof(*iap));
event_name = pmu_alias_get(event_name);
pm->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
if ((pe = pmu_event_get(event_name, &idx)) == NULL)
return (ENOENT);
if (pe->alias && (pe = pmu_event_get(pe->alias, &idx)) == NULL)
@ -302,6 +314,29 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)
if (pmu_parse_event(&ped, pe->event))
return (ENOENT);
for (idx = 0; fixed_mode_cntrs[idx] != NULL; idx++)
if (strcmp(fixed_mode_cntrs[idx], event_name) == 0) {
isfixed = 1;
printf("%s is fixed\n", event_name);
}
if (isfixed) {
if (strcasestr(pe->desc, "retired") != NULL)
pm->pm_ev = PMC_EV_IAF_INSTR_RETIRED_ANY;
else if (strcasestr(pe->desc, "core") != NULL ||
strcasestr(pe->desc, "unhalted"))
pm->pm_ev = PMC_EV_IAF_CPU_CLK_UNHALTED_CORE;
else if (strcasestr(pe->desc, "ref") != NULL)
pm->pm_ev = PMC_EV_IAF_CPU_CLK_UNHALTED_REF;
iaf->pm_iaf_flags |= (IAF_USR | IAF_OS);
if (ped.ped_any)
iaf->pm_iaf_flags |= IAF_ANY;
if (pm->pm_caps & PMC_CAP_INTERRUPT)
iaf->pm_iaf_flags |= IAF_PMI;
pm->pm_class = PMC_CLASS_IAF;
return (0);
}
pm->pm_caps |= PMC_CAP_QUALIFIER;
pm->pm_class = PMC_CLASS_IAP;
pm->pm_ev = idx;
iap->pm_iap_config |= IAP_EVSEL(ped.ped_event);
@ -325,11 +360,12 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)
* Ultimately rely on AMD calling theirs the same
*/
static const char *stat_mode_cntrs[] = {
"cpu_clk_unhalted.thread_any",
"inst_retired.any",
"cpu_clk_unhalted.thread_p_any",
"br_inst_retired.all_branches",
"br_misp_retired.all_branches",
"cpu_clk_unhalted.thread_p_any"
"longest_lat_cache.reference",
"longest_lat_cache.miss",
};
int