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selftests/resctrl: Close perf value read fd on errors 

Perf event fd (fd_lm) is not closed when run_fill_buf() returns error.

Close fd_lm only in cat_val() to make it easier to track it is always
closed.

Fixes: 790bf585b0 ("selftests/resctrl: Add Cache Allocation Technology (CAT) selftest")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Ilpo Järvinen 2023-07-17 16:14:52 +03:00 committed by Shuah Khan
parent f99e413eb5
commit 51a0c3b7f0
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
tools/testing/selftests/resctrl/cache.c
View File

@ -87,21 +87,19 @@ static int reset_enable_llc_perf(pid_t pid, int cpu_no)
static int get_llc_perf(unsigned long *llc_perf_miss)
{
__u64 total_misses;
int ret;
/* Stop counters after one span to get miss rate */
ioctl(fd_lm, PERF_EVENT_IOC_DISABLE, 0);
if (read(fd_lm, &rf_cqm, sizeof(struct read_format)) == -1) {
ret = read(fd_lm, &rf_cqm, sizeof(struct read_format));
if (ret == -1) {
perror("Could not get llc misses through perf");
return -1;
}
total_misses = rf_cqm.values[0].value;
close(fd_lm);
*llc_perf_miss = total_misses;
return 0;
@ -253,19 +251,25 @@ int cat_val(struct resctrl_val_param *param)
memflush, operation, resctrl_val)) {
fprintf(stderr, "Error-running fill buffer\n");
ret = -1;
break;
goto pe_close;
}
sleep(1);
ret = measure_cache_vals(param, bm_pid);
if (ret)
break;
goto pe_close;
close(fd_lm);
} else {
break;
}
}
return ret;
pe_close:
close(fd_lm);
return ret;
}
/*