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test/power: fix CPU frequency when turbo enabled

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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: 606a234c6d ("test/power: round CPU frequency to check")
Cc: stable@dpdk.org

Signed-off-by: Richael Zhuang <richael.zhuang@arm.com>
Acked-by: David Hunt <david.hunt@intel.com>
This commit is contained in:
Richael Zhuang 2021-07-09 18:55:48 +08:00 committed by David Marchand
parent ef1cc88f18
commit 29343b9030
1 changed files with 13 additions and 8 deletions
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21
app/test/test_power_cpufreq.c
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@ -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);
freq_conv = cur_freq;
/* 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;
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);