Hi Babu,
Subject and changelog mentions how controller name is "passed" but the
patch does not seem to "pass" anything new.
On 6/5/24 3:45 PM, Babu Moger wrote:
The test detects number of memory controllers by looking at the sysfs
file system. Detect the vendor to pass the controller name appropriately.
So, that rest of the code will be generic and can be used to support other
vendors.
Also change the search to look for the full string "uncore_imc_". Replace
the sizeof with strlen.
Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
---
v3: Change the search string to "uncore_imc_".
v2: No changes
---
tools/testing/selftests/resctrl/resctrl_val.c | 22 ++++++++++++-------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
index 2d5e961b3a68..23c0e0a1d845 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -10,7 +10,7 @@
*/
#include "resctrl.h"
-#define UNCORE_IMC "uncore_imc"
+#define UNCORE_IMC "uncore_imc_"
#define READ_FILE_NAME "events/cas_count_read"
#define WRITE_FILE_NAME "events/cas_count_write"
#define DYN_PMU_PATH "/sys/bus/event_source/devices"
@@ -206,24 +206,30 @@ static int num_of_mem_controllers(void)
char mc_dir[512], *temp;
unsigned int count = 0;
struct dirent *ep;
- int ret;
+ char *sysfs_name;
+ int ret, vendor;
DIR *dp;
+ vendor = get_vendor();
get_vendor() is already optimized to only need to do actual detection once.
I thus do not see a need for a local variable.
+ if (vendor == ARCH_INTEL) {
+ sysfs_name = UNCORE_IMC;
+ } else {
+ ksft_perror("Unsupported vendor!\n");
ksft_perror() also adds a "\n" so adding it here is not necessary. Also
please drop the exclamation.
+ return -1;
+ }
+
dp = opendir(DYN_PMU_PATH);
if (dp) {
while ((ep = readdir(dp))) {
- temp = strstr(ep->d_name, UNCORE_IMC);
+ temp = strstr(ep->d_name, sysfs_name);
if (!temp)
continue;
/*
* imc counters are named as "uncore_imc_<n>", hence
- * increment the pointer to point to <n>. Note that
- * sizeof(UNCORE_IMC) would count for null character as
- * well and hence the last underscore character in
- * uncore_imc'_' need not be counted.
+ * increment the pointer to point to <n>.
*/
- temp = temp + sizeof(UNCORE_IMC);
+ temp = temp + strlen(sysfs_name);
/*
* Some directories under "DYN_PMU_PATH" could have
Reinette
