Hi Mel, [auto build test WARNING on pm/linux-next] [also build test WARNING on next-20160223] [cannot apply to v4.5-rc5] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Mel-Gorman/intel_pstate-Increase-hold-off-time-before-samples-are-scaled-v2/20160223-223212 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: i386-randconfig-x006-201608 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): drivers/cpufreq/intel_pstate.c: In function 'get_target_pstate_use_performance': >> drivers/cpufreq/intel_pstate.c:957:49: warning: unused variable >> 'sample_ratio' [-Wunused-variable] int32_t core_busy, max_pstate, current_pstate, sample_ratio; ^ vim +/sample_ratio +957 drivers/cpufreq/intel_pstate.c 63d1d656 Philippe Longepe 2015-12-04 941 63d1d656 Philippe Longepe 2015-12-04 942 e70eed2b Philippe Longepe 2015-12-04 943 /* e70eed2b Philippe Longepe 2015-12-04 944 * The load can be estimated as the ratio of the mperf counter e70eed2b Philippe Longepe 2015-12-04 945 * running at a constant frequency during active periods e70eed2b Philippe Longepe 2015-12-04 946 * (C0) and the time stamp counter running at the same frequency e70eed2b Philippe Longepe 2015-12-04 947 * also during C-states. e70eed2b Philippe Longepe 2015-12-04 948 */ 63d1d656 Philippe Longepe 2015-12-04 949 cpu_load = div64_u64(int_tofp(100) * mperf, sample->tsc); e70eed2b Philippe Longepe 2015-12-04 950 cpu->sample.busy_scaled = cpu_load; e70eed2b Philippe Longepe 2015-12-04 951 e70eed2b Philippe Longepe 2015-12-04 952 return cpu->pstate.current_pstate - pid_calc(&cpu->pid, cpu_load); e70eed2b Philippe Longepe 2015-12-04 953 } e70eed2b Philippe Longepe 2015-12-04 954 157386b6 Philippe Longepe 2015-12-04 955 static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu) 93f0822d Dirk Brandewie 2013-02-06 956 { c4ee841f Dirk Brandewie 2014-05-29 @957 int32_t core_busy, max_pstate, current_pstate, sample_ratio; 402c43ed Rafael J. Wysocki 2016-02-05 958 u64 duration_ns; 93f0822d Dirk Brandewie 2013-02-06 959 e0d4c8f8 Kristen Carlson Accardi 2014-12-10 960 /* e0d4c8f8 Kristen Carlson Accardi 2014-12-10 961 * core_busy is the ratio of actual performance to max e0d4c8f8 Kristen Carlson Accardi 2014-12-10 962 * max_pstate is the max non turbo pstate available e0d4c8f8 Kristen Carlson Accardi 2014-12-10 963 * current_pstate was the pstate that was requested during e0d4c8f8 Kristen Carlson Accardi 2014-12-10 964 * the last sample period. e0d4c8f8 Kristen Carlson Accardi 2014-12-10 965 * :::::: The code at line 957 was first introduced by commit :::::: c4ee841f602e5eef8eab673295c49c5b49d7732b intel_pstate: add sample time scaling :::::: TO: Dirk Brandewie <dirk.j.brande...@intel.com> :::::: CC: Rafael J. Wysocki <rafael.j.wyso...@intel.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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