Forcing a AMD64 pmu can now be done by specifying a certain family,
model and stepping. The syntax of the environment variable for this
has been extended:
LIBPFM_FORCE_PMU=16,<family>,<model>,<stepping>
Signed-off-by: Robert Richter <robert.rich...@amd.com>
---
lib/pfmlib_amd64.c | 47 ++++++++++++++++++++++++++++++++++++++---------
1 files changed, 38 insertions(+), 9 deletions(-)
diff --git a/lib/pfmlib_amd64.c b/lib/pfmlib_amd64.c
index f8bee8c..242fbc1 100644
--- a/lib/pfmlib_amd64.c
+++ b/lib/pfmlib_amd64.c
@@ -236,18 +236,47 @@ pfm_amd64_detect(void)
return PFMLIB_SUCCESS;
}
+static void
+pfm_amd64_force(void)
+{
+ char *str;
+ int pmu_type;
+
+ /* parses LIBPFM_FORCE_PMU=16,<family>,<model>,<stepping> */
+ str = getenv("LIBPFM_FORCE_PMU");
+ if (!str)
+ goto failed;
+ pmu_type = strtol(str, &str, 10);
+ if (pmu_type != 16)
+ goto failed;
+ if (!*str || *str++ != ',')
+ goto failed;
+ amd64_family = strtol(str, &str, 10);
+ if (!*str || *str++ != ',')
+ goto failed;
+ amd64_model = strtol(str, &str, 10);
+ if (!*str || *str++ != ',')
+ goto failed;
+ amd64_stepping = strtol(str, &str, 10);
+ if (!*str)
+ goto done;
+failed:
+ DPRINT("force failed at: %s\n", str ? str : "<NULL>");
+ /* force AMD64 = force to Barcelona */
+ amd64_family = 16;
+ amd64_model = 2;
+ amd64_stepping = 2;
+done:
+ amd64_revision = amd64_get_revision(amd64_family, amd64_model,
+ amd64_stepping);
+}
+
static int
pfm_amd64_init(void)
{
- /*
- * force AMD64 = force to Barcelona
- */
- if (forced_pmu != PFMLIB_NO_PMU) {
- amd64_family = 16;
- amd64_model = 2;
- amd64_stepping = 2;
- amd64_revision = amd64_get_revision(amd64_family, amd64_model,
amd64_stepping);
- }
+ if (forced_pmu != PFMLIB_NO_PMU)
+ pfm_amd64_force();
+
__pfm_vbprintf("AMD family=%d model=0x%x stepping=0x%x rev=%s (%s)\n",
amd64_family,
amd64_model,
--
1.6.1.2
------------------------------------------------------------------------------
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