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Support event aliases in pmcstat #1514

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Support event aliases in pmcstat #1514

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c8f3a23
libpmc: Allow using generic event aliases on Morello
arichardson Oct 11, 2022
80ee18c
libpmc: Add "cycles" event alias for armv8
arichardson Oct 11, 2022
8b5c546
libpmc: Support alias event specifiers with suffixes
arichardson Oct 11, 2022
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6 changes: 6 additions & 0 deletions lib/libpmc/libpmc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1114,6 +1114,12 @@ pmc_allocate(const char *ctrspec, enum pmc_mode mode,
break;
}

/* Try pmu_alias_get as another generic fallback/ */
if (spec_copy == NULL) {
const char* alias_name = _pmu_alias_get(ctrspec);
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s/const char* /const char */

if (alias_name)
spec_copy = strdup(alias_name);
}
if (spec_copy == NULL)
spec_copy = strdup(ctrspec);

Expand Down
27 changes: 14 additions & 13 deletions lib/libpmc/libpmc_pmu_util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,7 @@
#include <pmclog.h>
#include <assert.h>
#include <libpmcstat.h>
#include "libpmcinternal.h"
#include "pmu-events/pmu-events.h"

struct pmu_alias {
Expand Down Expand Up @@ -132,8 +133,8 @@ pmu_events_mfr(void)
*
*/

static const char *
pmu_alias_get(const char *name)
const char *
_pmu_alias_get(const char *name)
{
pmu_mfr_t mfr;
struct pmu_alias *pa;
Expand All @@ -156,8 +157,8 @@ pmu_alias_get(const char *name)
}
#elif defined(__powerpc64__)

static const char *
pmu_alias_get(const char *name)
const char *
_pmu_alias_get(const char *name)
{
return (name);
}
Expand All @@ -183,8 +184,8 @@ static struct pmu_alias pmu_armv8_alias_table[] = {
{NULL, NULL},
};

static const char *
pmu_alias_get(const char *name)
const char *
_pmu_alias_get(const char *name)
{
struct pmu_alias *pa;

Expand All @@ -197,8 +198,8 @@ pmu_alias_get(const char *name)

#else

static const char *
pmu_alias_get(const char *name)
const char *
_pmu_alias_get(const char *name)
{

return (name);
Expand Down Expand Up @@ -284,7 +285,7 @@ pmc_pmu_idx_get_by_event(const char *cpuid, const char *event)
int idx;
const char *realname;

realname = pmu_alias_get(event);
realname = _pmu_alias_get(event);
if (pmu_event_get(cpuid, realname, &idx) == NULL)
return (-1);
return (idx);
Expand Down Expand Up @@ -365,7 +366,7 @@ pmc_pmu_sample_rate_get(const char *event_name)
const struct pmu_event *pe;
struct pmu_event_desc ped;

event_name = pmu_alias_get(event_name);
event_name = _pmu_alias_get(event_name);
if ((pe = pmu_event_get(NULL, event_name, NULL)) == NULL)
return (DEFAULT_SAMPLE_COUNT);
if (pe->event == NULL)
Expand Down Expand Up @@ -587,7 +588,7 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)

bzero(&pm->pm_md, sizeof(pm->pm_md));
pm->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
event_name = pmu_alias_get(event_name);
event_name = _pmu_alias_get(event_name);
if ((pe = pmu_event_get(NULL, event_name, &idx)) == NULL)
return (ENOENT);
assert(idx >= 0);
Expand Down Expand Up @@ -615,7 +616,7 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)

bzero(&pm->pm_md, sizeof(pm->pm_md));
pm->pm_caps |= (PMC_CAP_READ | PMC_CAP_WRITE);
event_name = pmu_alias_get(event_name);
event_name = _pmu_alias_get(event_name);

if ((pe = pmu_event_get(NULL, event_name, &idx)) == NULL)
return (ENOENT);
Expand All @@ -640,7 +641,7 @@ pmc_pmu_pmcallocate(const char *event_name, struct pmc_op_pmcallocate *pm)
struct pmu_event_desc ped;
int idx = -1;

event_name = pmu_alias_get(event_name);
event_name = _pmu_alias_get(event_name);
if ((pe = pmu_event_get(NULL, event_name, &idx)) == NULL)
return (ENOENT);
if (pe->event == NULL)
Expand Down
1 change: 1 addition & 0 deletions lib/libpmc/libpmcinternal.h
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Expand Up @@ -35,5 +35,6 @@
* Prototypes.
*/
const char *_pmc_name_of_event(enum pmc_event _ev, enum pmc_cputype _cpu);
const char *_pmu_alias_get(const char *name);

#endif /* LIBPMC_INTERNAL_H */