[PATCH v2 12/26] selftests/resctrl: Consolidate naming of perf event related things

Ilpo Järvinen
2023-11-20T11:16:12Z

Naming for perf event related functions, types, and variables is
currently inconsistent.

Make struct read_format and all functions related to perf events start
with "perf_". Adjust variable names towards the same direction but use
shorter names for variables where appropriate (pe prefix).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
tools/testing/selftests/resctrl/cache.c | 42 ++++++++++++-------------
1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index aea4f54d32bd..52d37d1c380f 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -3,7 +3,7 @@
#include <stdint.h>
#include "resctrl.h"

-struct read_format {
+struct perf_event_read {
__u64 nr; /* The number of events */
struct {
__u64 value; /* The value of the event */
@@ -11,11 +11,11 @@ struct read_format {
};

static struct perf_event_attr pea_llc_miss;
-static struct read_format rf_cqm;
-static int fd_lm;
+static struct perf_event_read pe_read;
+static int pe_fd;
char llc_occup_path[1024];

-static void initialize_perf_event_attr(void)
+static void perf_event_attr_initialize(void)
{
pea_llc_miss.type = PERF_TYPE_HARDWARE;
pea_llc_miss.size = sizeof(struct perf_event_attr);
@@ -30,34 +30,34 @@ static void initialize_perf_event_attr(void)
}

/* Start counters to log values */
-static void ioctl_perf_event_ioc_reset_enable(void)
+static void perf_event_reset_enable(void)
{
- ioctl(fd_lm, PERF_EVENT_IOC_RESET, 0);
- ioctl(fd_lm, PERF_EVENT_IOC_ENABLE, 0);
+ ioctl(pe_fd, PERF_EVENT_IOC_RESET, 0);
+ ioctl(pe_fd, PERF_EVENT_IOC_ENABLE, 0);
}

-static void initialize_llc_perf(void)
+static void perf_event_initialize(void)
{
memset(&pea_llc_miss, 0, sizeof(struct perf_event_attr));
- memset(&rf_cqm, 0, sizeof(struct read_format));
+ memset(&pe_read, 0, sizeof(struct perf_event_read));

/* Initialize perf_event_attr structures for HW_CACHE_MISSES */
- initialize_perf_event_attr();
+ perf_event_attr_initialize();

pea_llc_miss.config = PERF_COUNT_HW_CACHE_MISSES;

- rf_cqm.nr = 1;
+ pe_read.nr = 1;
}

-static int reset_enable_llc_perf(pid_t pid, int cpu_no)
+static int perf_open(pid_t pid, int cpu_no)
{
- fd_lm = perf_event_open(&pea_llc_miss, pid, cpu_no, -1, PERF_FLAG_FD_CLOEXEC);
- if (fd_lm == -1) {
+ pe_fd = perf_event_open(&pea_llc_miss, pid, cpu_no, -1, PERF_FLAG_FD_CLOEXEC);
+ if (pe_fd == -1) {
perror("Error opening leader");
return -1;
}

- ioctl_perf_event_ioc_reset_enable();
+ perf_event_reset_enable();

return 0;
}
@@ -141,15 +141,15 @@ static int perf_event_measure(const char *filename, int bm_pid)
int ret;

/* Stop counters after one span to get miss rate */
- ioctl(fd_lm, PERF_EVENT_IOC_DISABLE, 0);
+ ioctl(pe_fd, PERF_EVENT_IOC_DISABLE, 0);

- ret = read(fd_lm, &rf_cqm, sizeof(struct read_format));
+ ret = read(pe_fd, &pe_read, sizeof(struct perf_event_read));
if (ret == -1) {
perror("Could not get perf value");
return -1;
}

- return print_results_cache(filename, bm_pid, rf_cqm.values[0].value);
+ return print_results_cache(filename, bm_pid, pe_read.values[0].value);
}

/*
@@ -205,7 +205,7 @@ int cat_val(struct resctrl_val_param *param, size_t span)
if (ret)
return ret;

- initialize_llc_perf();
+ perf_event_initialize();

/* Test runs until the callback setup() tells the test to stop. */
while (1) {
@@ -216,7 +216,7 @@ int cat_val(struct resctrl_val_param *param, size_t span)
}
if (ret < 0)
break;
- ret = reset_enable_llc_perf(bm_pid, param->cpu_no);
+ ret = perf_open(bm_pid, param->cpu_no);
if (ret)
break;

@@ -235,7 +235,7 @@ int cat_val(struct resctrl_val_param *param, size_t span)
return ret;

pe_close:
- close(fd_lm);
+ close(pe_fd);
return ret;
}

--
2.30.2