[dpdk-dev] [PATCH v1 1/4] test/power: fix check for cpu frequency

[David Hunt]

Different drivers present the current cpu core frequency in different
sysfs iles. Some present it in cpuinfo_cur_freq, some in scaling_cur_freq,
and some actually present it in both.

This patch attempts to open one, if that fails, tries the other.

Fixes: d550a8cc31f3 ("app/test: enhance power manager unit tests")
Cc: sta...@dpdk.org

Signed-off-by: David Hunt <david.h...@intel.com>
---
 app/test/test_power_cpufreq.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/app/test/test_power_cpufreq.c b/app/test/test_power_cpufreq.c
index f753d24ac5..52f58ef8b2 100644
--- a/app/test/test_power_cpufreq.c
+++ b/app/test/test_power_cpufreq.c
@@ -39,8 +39,10 @@ test_power_caps(void)
 #define TEST_FREQ_ROUNDING_DELTA 50000
 #define TEST_ROUND_FREQ_TO_N_100000 100000
 
-#define TEST_POWER_SYSFILE_CUR_FREQ \
+#define TEST_POWER_SYSFILE_CPUINFO_FREQ \
        "/sys/devices/system/cpu/cpu%u/cpufreq/cpuinfo_cur_freq"
+#define TEST_POWER_SYSFILE_SCALING_FREQ \
+       "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq"
 
 static uint32_t total_freq_num;
 static uint32_t freqs[TEST_POWER_FREQS_NUM_MAX];
@@ -58,12 +60,19 @@ check_cur_freq(unsigned lcore_id, uint32_t idx)
        int i;
 
        if (snprintf(fullpath, sizeof(fullpath),
-               TEST_POWER_SYSFILE_CUR_FREQ, lcore_id) < 0) {
+               TEST_POWER_SYSFILE_SCALING_FREQ, lcore_id) < 0) {
                return 0;
        }
        f = fopen(fullpath, "r");
        if (f == NULL) {
-               return 0;
+               if (snprintf(fullpath, sizeof(fullpath),
+                       TEST_POWER_SYSFILE_CPUINFO_FREQ, lcore_id) < 0) {
+                       return 0;
+               }
+               f = fopen(fullpath, "r");
+               if (f == NULL) {
+                       return 0;
+               }
        }
        for (i = 0; i < MAX_LOOP; i++) {
                fflush(f);
-- 
2.17.1