From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Hunt Subject: [PATCH v2 4/8] examples/vm_power_mgr: add scale to medium freq fn Date: Mon, 25 Sep 2017 13:27:05 +0100 Message-ID: <1506342429-199695-5-git-send-email-david.hunt@intel.com> References: <1503676941-80981-1-git-send-email-david.hunt@intel.com> <1506342429-199695-1-git-send-email-david.hunt@intel.com> Cc: konstantin.ananyev@intel.com, jingjing.wu@intel.com, David Hunt , Nemanja Marjanovic , Rory Sexton To: dev@dpdk.org Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 286CA1B1B9 for ; Mon, 25 Sep 2017 14:38:08 +0200 (CEST) In-Reply-To: <1506342429-199695-1-git-send-email-david.hunt@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Signed-off-by: Nemanja Marjanovic Signed-off-by: Rory Sexton Signed-off-by: David Hunt --- examples/vm_power_manager/power_manager.c | 15 +++++++++++++++ examples/vm_power_manager/power_manager.h | 13 +++++++++++++ 2 files changed, 28 insertions(+) diff --git a/examples/vm_power_manager/power_manager.c b/examples/vm_power_manager/power_manager.c index 80705f9..c021c1d 100644 --- a/examples/vm_power_manager/power_manager.c +++ b/examples/vm_power_manager/power_manager.c @@ -286,3 +286,18 @@ 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, 5); + 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