[dpdk-stable] patch 'test/power: fix CPU frequency check' has been queued to stable release 19.11.9

[Christian Ehrhardt]

Hi,

FYI, your patch has been queued to stable release 19.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/12/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/cpaelzer/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/cpaelzer/dpdk-stable-queue/commit/647d1039feeb7f783742c813a5ac1d07abcd9aee

Thanks.

Christian Ehrhardt <christian.ehrhardt at canonical.com>

---
>From 647d1039feeb7f783742c813a5ac1d07abcd9aee Mon Sep 17 00:00:00 2001
From: David Hunt <david.hunt at intel.com>
Date: Wed, 12 May 2021 17:32:51 +0100
Subject: [PATCH] test/power: fix CPU frequency check

[ upstream commit ff6dfb8e492f1cfa8755150816d888541e2cd7c7 ]

Different drivers present the current cpu core frequency in different
sysfs files. 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")

Signed-off-by: David Hunt <david.hunt at 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 6c2f5ced72..25e77ab375 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);
-- 
2.31.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-06-10 14:04:59.819886022 +0200
+++ 0037-test-power-fix-CPU-frequency-check.patch	2021-06-10 14:04:58.066024643 +0200
@@ -1 +1 @@
-From ff6dfb8e492f1cfa8755150816d888541e2cd7c7 Mon Sep 17 00:00:00 2001
+From 647d1039feeb7f783742c813a5ac1d07abcd9aee Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit ff6dfb8e492f1cfa8755150816d888541e2cd7c7 ]
+
@@ -13 +14,0 @@
-Cc: stable at dpdk.org
@@ -21 +22 @@
-index f753d24ac5..52f58ef8b2 100644
+index 6c2f5ced72..25e77ab375 100644