diff mbox series

[v4,2/2] test/power: round cpuinfo cur freq only when using CPPC cpufreq

Message ID 20210623035541.50543-3-richael.zhuang@arm.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers show
Series power: add support for cppc cpufreq driver | expand

Checks

Context Check Description
ci/github-robot fail github build: failed
ci/Intel-compilation fail Compilation issues
ci/checkpatch success coding style OK

Commit Message

Richael Zhuang June 23, 2021, 3:55 a.m. UTC
On arm platform, the value in "/sys/.../cpuinfo_cur_freq" may not
be exactly the same as what was set when using CPPC cpufreq driver.
For other cpufreq driver, no need to round it currently, or else
this check will fail with turbo enabled. For example, with acpi_cpufreq,
cpuinfo_cur_freq can be 2401000 which is equal to freqs[0].It should
not be rounded to 2400000.

Fixes: 606a234c6d360 ("test/power: round CPU frequency to check")
Cc: richael.zhuang@arm.com
Cc: stable@dpdk.org

Signed-off-by: Richael Zhuang <richael.zhuang@arm.com>
---
 app/test/test_power_cpufreq.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

Comments

David Hunt June 23, 2021, 2:13 p.m. UTC | #1
Hi Richael,

On 23/6/2021 4:55 AM, Richael Zhuang wrote:
> On arm platform, the value in "/sys/.../cpuinfo_cur_freq" may not
> be exactly the same as what was set when using CPPC cpufreq driver.
> For other cpufreq driver, no need to round it currently, or else
> this check will fail with turbo enabled. For example, with acpi_cpufreq,
> cpuinfo_cur_freq can be 2401000 which is equal to freqs[0].It should
> not be rounded to 2400000.
>
> Fixes: 606a234c6d360 ("test/power: round CPU frequency to check")
> Cc: richael.zhuang@arm.com
> Cc: stable@dpdk.org
>
> Signed-off-by: Richael Zhuang <richael.zhuang@arm.com>
> ---
>   app/test/test_power_cpufreq.c | 23 ++++++++++++++---------
>   1 file changed, 14 insertions(+), 9 deletions(-)

--snip--

Makes sense.

Reviewed-by: David Hunt <david.hunt@intel.com>
diff mbox series

Patch

diff --git a/app/test/test_power_cpufreq.c b/app/test/test_power_cpufreq.c
index 8516df4ca..b8fc53925 100644
--- a/app/test/test_power_cpufreq.c
+++ b/app/test/test_power_cpufreq.c
@@ -55,7 +55,9 @@  check_cur_freq(unsigned int lcore_id, uint32_t idx, bool turbo)
 	FILE *f;
 	char fullpath[PATH_MAX];
 	char buf[BUFSIZ];
+	enum power_management_env env;
 	uint32_t cur_freq;
+	uint32_t freq_conv;
 	int ret = -1;
 	int i;
 
@@ -80,15 +82,18 @@  check_cur_freq(unsigned int lcore_id, uint32_t idx, bool turbo)
 			goto fail_all;
 
 		cur_freq = strtoul(buf, NULL, TEST_POWER_CONVERT_TO_DECIMAL);
-
-		/* convert the frequency to nearest 100000 value
-		 * Ex: if cur_freq=1396789 then freq_conv=1400000
-		 * Ex: if cur_freq=800030 then freq_conv=800000
-		 */
-		unsigned int freq_conv = 0;
-		freq_conv = (cur_freq + TEST_FREQ_ROUNDING_DELTA)
-					/ TEST_ROUND_FREQ_TO_N_100000;
-		freq_conv = freq_conv * TEST_ROUND_FREQ_TO_N_100000;
+		freq_conv = cur_freq;
+
+		env = rte_power_get_env();
+		if (env == PM_ENV_CPPC_CPUFREQ) {
+			/* convert the frequency to nearest 100000 value
+			 * Ex: if cur_freq=1396789 then freq_conv=1400000
+			 * Ex: if cur_freq=800030 then freq_conv=800000
+			 */
+			freq_conv = (cur_freq + TEST_FREQ_ROUNDING_DELTA)
+						/ TEST_ROUND_FREQ_TO_N_100000;
+			freq_conv = freq_conv * TEST_ROUND_FREQ_TO_N_100000;
+		}
 
 		if (turbo)
 			ret = (freqs[idx] <= freq_conv ? 0 : -1);