Re: [dpdk-dev] [PATCH v3 2/3] test/power: fix a bug in cpufreq autotest

[Richael Zhuang <Richael.Zhuang@arm.com>]

Hi,
Thanks for your comments.
My change  is to make  the check_power_turbo()  to continue only when rte_power_turbo_status(TEST_POWER_LCORE_ID) returns 1 which means turbo is available.

-----Original Message-----
From: Burakov, Anatoly <anatoly.burakov@intel.com>
Sent: Wednesday, April 7, 2021 5:59 PM
To: Richael Zhuang <Richael.Zhuang@arm.com>; dev@dpdk.org
Cc: lukaszx.krakowiak@intel.com; stable@dpdk.org; David Hunt <david.hunt@intel.com>
Subject: Re: [dpdk-dev] [PATCH v3 2/3] test/power: fix a bug in cpufreq autotest

On 07-Apr-21 8:46 AM, Richael Zhuang wrote:
> For platforms that don't support turbo boost,rte_power_turbo_status()
> returns "-ENOTSUP" (like power_kvm_vm_turbo_status()). So don't allow
> check_power_turbo() to continue if
> rte_power_turbo_status(TEST_POWER_LCORE_ID)!=1
>
> Fixes: aeaeaf5f2d62 ("test/power: add cases for turbo feature")
> Cc: lukaszx.krakowiak@intel.com
> Cc: stable@dpdk.org
>
> Signed-off-by: Richael Zhuang <richael.zhuang@arm.com>
> ---
>   app/test/test_power_cpufreq.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/app/test/test_power_cpufreq.c
> b/app/test/test_power_cpufreq.c index 1f4d8bb05..cda74bd8a 100644
> --- a/app/test/test_power_cpufreq.c
> +++ b/app/test/test_power_cpufreq.c
> @@ -386,7 +386,7 @@ check_power_turbo(void)
>   {
>   int ret;
>
> -if (rte_power_turbo_status(TEST_POWER_LCORE_ID) == 0) {
> +if (rte_power_turbo_status(TEST_POWER_LCORE_ID) != 1) {
>   printf("Turbo not available on lcore %u, skipping test\n",
>   TEST_POWER_LCORE_ID);
>   return 0;
>

If what you're really checking is -ENOTSUP, maybe check for that?
Because otherwise it seems like you're making unwarranted assumptions about why the call failed...

--
Thanks,
Anatoly
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