From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 111C31B250 for ; Thu, 5 Oct 2017 16:34:30 +0200 (CEST) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP; 05 Oct 2017 07:34:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,481,1500966000"; d="scan'208";a="159778266" Received: from silpixa00397898.ir.intel.com ([10.237.223.116]) by fmsmga006.fm.intel.com with ESMTP; 05 Oct 2017 07:34:29 -0700 From: David Hunt To: dev@dpdk.org Cc: konstantin.ananyev@intel.com, jingjing.wu@intel.com, santosh.shukla@caviumnetworks.com, David Hunt , Nemanja Marjanovic , Rory Sexton Date: Thu, 5 Oct 2017 15:34:15 +0100 Message-Id: <1507214060-71966-5-git-send-email-david.hunt@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1507214060-71966-1-git-send-email-david.hunt@intel.com> References: <1507210100-69917-1-git-send-email-david.hunt@intel.com> <1507214060-71966-1-git-send-email-david.hunt@intel.com> Subject: [dpdk-dev] [PATCH v8 4/9] examples/vm_power_mgr: add scale to medium freq fn X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Oct 2017 14:34:31 -0000 Signed-off-by: Nemanja Marjanovic Signed-off-by: Rory Sexton Signed-off-by: David Hunt Reviewed-by: Santosh Shukla Acked-by: Konstantin Ananyev --- examples/vm_power_manager/power_manager.c | 32 ++++++++++++++++++++++++++----- examples/vm_power_manager/power_manager.h | 13 +++++++++++++ 2 files changed, 40 insertions(+), 5 deletions(-) diff --git a/examples/vm_power_manager/power_manager.c b/examples/vm_power_manager/power_manager.c index 80705f9..1834a82 100644 --- a/examples/vm_power_manager/power_manager.c +++ b/examples/vm_power_manager/power_manager.c @@ -108,7 +108,7 @@ set_host_cpus_mask(void) int power_manager_init(void) { - unsigned i, num_cpus; + unsigned int i, num_cpus, num_freqs; uint64_t cpu_mask; int ret = 0; @@ -121,15 +121,21 @@ power_manager_init(void) rte_power_set_env(PM_ENV_ACPI_CPUFREQ); cpu_mask = global_enabled_cpus; for (i = 0; cpu_mask; cpu_mask &= ~(1 << i++)) { - if (rte_power_init(i) < 0 || rte_power_freqs(i, - global_core_freq_info[i].freqs, - RTE_MAX_LCORE_FREQS) == 0) { - RTE_LOG(ERR, POWER_MANAGER, "Unable to initialize power manager " + if (rte_power_init(i) < 0) + RTE_LOG(ERR, POWER_MANAGER, + "Unable to initialize power manager " "for core %u\n", i); + num_freqs = rte_power_freqs(i, global_core_freq_info[i].freqs, + RTE_MAX_LCORE_FREQS); + if (num_freqs == 0) { + RTE_LOG(ERR, POWER_MANAGER, + "Unable to get frequency list for core %u\n", + i); global_enabled_cpus &= ~(1 << i); num_cpus--; ret = -1; } + global_core_freq_info[i].num_freqs = num_freqs; rte_spinlock_init(&global_core_freq_info[i].power_sl); } RTE_LOG(INFO, POWER_MANAGER, "Detected %u host CPUs , enabled core mask:" @@ -286,3 +292,19 @@ power_manager_disable_turbo_core(unsigned int core_num) POWER_SCALE_CORE(disable_turbo, core_num, ret); return ret; } + +int +power_manager_scale_core_med(unsigned int core_num) +{ + int ret = 0; + + if (core_num >= POWER_MGR_MAX_CPUS) + return -1; + if (!(global_enabled_cpus & (1ULL << core_num))) + return -1; + rte_spinlock_lock(&global_core_freq_info[core_num].power_sl); + ret = rte_power_set_freq(core_num, + global_core_freq_info[core_num].num_freqs / 2); + rte_spinlock_unlock(&global_core_freq_info[core_num].power_sl); + return ret; +} diff --git a/examples/vm_power_manager/power_manager.h b/examples/vm_power_manager/power_manager.h index b74d09b..b52fb4c 100644 --- a/examples/vm_power_manager/power_manager.h +++ b/examples/vm_power_manager/power_manager.h @@ -231,6 +231,19 @@ int power_manager_disable_turbo_core(unsigned int core_num); */ uint32_t power_manager_get_current_frequency(unsigned core_num); +/** + * Scale to medium frequency for the core specified by core_num. + * It is thread-safe. + * + * @param core_num + * The core number to change frequency + * + * @return + * - 1 on success. + * - 0 if frequency not changed. + * - Negative on error. + */ +int power_manager_scale_core_med(unsigned int core_num); #ifdef __cplusplus } -- 2.7.4