[dpdk-stable] [19.11.9] test/power: fix CPU frequency when turbo enabled
Christian Ehrhardt
christian.ehrhardt at canonical.com
Mon Sep 6 13:00:35 CEST 2021
On Fri, Sep 3, 2021 at 10:37 AM David Hunt <david.hunt at intel.com> wrote:
>
x missing proper reference to upstream commit
> 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.
>
> This is a version of the patch for 19.11.9 that fixes this issue
> withouth the dependency of having the CPPC support applied first
^^ typo
> (modified version of 29343b9030e38e8c3519ba01cb66724d45b13dc8)
Hi David, thank you for the backport.
I have fixed the typo and reference and made it part of the WIP 19.11 branch at
https://github.com/cpaelzer/dpdk-stable-queue/commits/19.11
It came too late for 19.11.10 which was released today and this wasn't
urgent enough to reset all the testing.
But you are very early in line for the next release :-)
> Fixes: 606a234c6d360 ("test/power: round CPU frequency to check")
> Cc: stable at dpdk.org
>
> Signed-off-by: David Hunt <david.hunt at intel.com>
> ---
> app/test/test_power_cpufreq.c | 29 ++++++++++++++++++-----------
> 1 file changed, 18 insertions(+), 11 deletions(-)
>
> diff --git a/app/test/test_power_cpufreq.c b/app/test/test_power_cpufreq.c
> index d0c7e60ca5..51105f35be 100644
> --- a/app/test/test_power_cpufreq.c
> +++ b/app/test/test_power_cpufreq.c
> @@ -55,18 +55,20 @@ 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;
>
> if (snprintf(fullpath, sizeof(fullpath),
> - TEST_POWER_SYSFILE_SCALING_FREQ, lcore_id) < 0) {
> + TEST_POWER_SYSFILE_CPUINFO_FREQ, lcore_id) < 0) {
> return 0;
> }
> f = fopen(fullpath, "r");
> if (f == NULL) {
> if (snprintf(fullpath, sizeof(fullpath),
> - TEST_POWER_SYSFILE_CPUINFO_FREQ, lcore_id) < 0) {
> + TEST_POWER_SYSFILE_SCALING_FREQ, lcore_id) < 0) {
> return 0;
> }
> f = fopen(fullpath, "r");
> @@ -80,15 +82,20 @@ 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_PSTATE_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
> + */
> + 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;
> + }
>
> if (turbo)
> ret = (freqs[idx] <= freq_conv ? 0 : -1);
> --
> 2.17.1
>
--
Christian Ehrhardt
Staff Engineer, Ubuntu Server
Canonical Ltd
More information about the stable
mailing list