If a user specifies an event code with ":u=<n>", ":k=<n>", or
":h=<n>" modifiers, evt2raw will now output a raw event code
which is compatible with "perf stat" and "perf record". For
example, it will translate:
PM_RUN_CYC:k=1:u=1
to
r200f4:uk
Without this change, the u,k, and h modifiers are simply dropped
silently by evt2raw.
Note that in order for this to work correctly, I had to change
the default privilege mask to add hypervisor mode.
Signed-off-by: Corey Ashford <cjash...@linux.vnet.ibm.com>
---
perf_examples/evt2raw.c | 20 +++++++++++++++++---
1 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/perf_examples/evt2raw.c b/perf_examples/evt2raw.c
index 7565ce9..eab7685 100644
--- a/perf_examples/evt2raw.c
+++ b/perf_examples/evt2raw.c
@@ -24,6 +24,7 @@
*/
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <unistd.h>
#include <err.h>
#include <perfmon/pfmlib_perf_event.h>
@@ -36,12 +37,14 @@ usage(void)
"translate to a raw code.\n");
}
+#define MAX_MODIFIER_CHARS 5 /* u,k,h plus the colon and null terminator */
int
main(int argc, char **argv)
{
int ret, c, verbose = 0;
struct perf_event_attr pea;
char *event_str, *fstr = NULL;
+ char modifiers[MAX_MODIFIER_CHARS];
if (argc < 2) {
usage();
@@ -67,7 +70,7 @@ main(int argc, char **argv)
pfm_strerror(ret));
pea.size = sizeof(struct perf_event_attr);
- ret = pfm_get_perf_event_encoding(event_str, PFM_PLM0|PFM_PLM3, &pea,
+ ret = pfm_get_perf_event_encoding(event_str,
PFM_PLM0|PFM_PLM3|PFM_PLMH, &pea,
&fstr, NULL);
if (ret != PFM_SUCCESS)
errx(1, "Error: pfm_get_perf_encoding returned %s",
@@ -76,10 +79,21 @@ main(int argc, char **argv)
if (pea.type != PERF_TYPE_RAW)
errx(1, "Error: %s is not a raw hardware event", event_str);
+ modifiers[0] = '\0';
+ if (pea.exclude_user | pea.exclude_kernel | pea.exclude_hv) {
+ strcat(modifiers, ":");
+ if (!pea.exclude_user)
+ strcat(modifiers, "u");
+ if (!pea.exclude_kernel)
+ strcat(modifiers, "k");
+ if (!pea.exclude_hv)
+ strcat(modifiers, "h");
+ }
+
if (verbose)
- printf("r%"PRIx64"\t%s\n", pea.config, fstr);
+ printf("r%"PRIx64"%s\t%s\n", pea.config, modifiers, fstr);
else
- printf("r%"PRIx64"\n", pea.config);
+ printf("r%"PRIx64"%s\n", pea.config, modifiers);
if (fstr)
free(fstr);
--
1.7.0.4
------------------------------------------------------------------------------
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