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Mon, 12 Jun 2023 06:38:25 -0500 From: Wyes Karny To: , , , , CC: , , , , , Wyes Karny Subject: [PATCH 4/6] cpupower: Add EPP value change support Date: Mon, 12 Jun 2023 11:36:13 +0000 Message-ID: <20230612113615.205353-5-wyes.karny@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230612113615.205353-1-wyes.karny@amd.com> References: <20230612113615.205353-1-wyes.karny@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT098:EE_|IA0PR12MB8896:EE_ X-MS-Office365-Filtering-Correlation-Id: e50bde08-921a-46c3-d80f-08db6b398aae X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(396003)(136003)(346002)(376002)(451199021)(40470700004)(36840700001)(46966006)(83380400001)(40460700003)(336012)(426003)(47076005)(2906002)(2616005)(40480700001)(36860700001)(36756003)(86362001)(82310400005)(82740400003)(81166007)(356005)(316002)(41300700001)(5660300002)(6666004)(8936002)(186003)(8676002)(7696005)(478600001)(110136005)(54906003)(70206006)(4326008)(70586007)(26005)(16526019)(1076003)(44832011)(2101003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jun 2023 11:38:28.6766 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e50bde08-921a-46c3-d80f-08db6b398aae X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT098.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8896 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1768497431400708962?= X-GMAIL-MSGID: =?utf-8?q?1768497431400708962?= amd_pstate and intel_pstate active mode drivers support energy performance preference feature. Through this user can convey it's energy/performance preference to platform. Add this value change capability to cpupower. To change the EPP value use below command: cpupower set --epp performance Signed-off-by: Wyes Karny --- tools/power/cpupower/utils/cpupower-set.c | 23 +++++++++++++++++++- tools/power/cpupower/utils/helpers/helpers.h | 5 +++++ tools/power/cpupower/utils/helpers/misc.c | 19 ++++++++++++++++ 3 files changed, 46 insertions(+), 1 deletion(-) diff --git a/tools/power/cpupower/utils/cpupower-set.c b/tools/power/cpupower/utils/cpupower-set.c index 180d5ba877e6..a789b123dbd4 100644 --- a/tools/power/cpupower/utils/cpupower-set.c +++ b/tools/power/cpupower/utils/cpupower-set.c @@ -18,6 +18,7 @@ static struct option set_opts[] = { {"perf-bias", required_argument, NULL, 'b'}, + {"epp", required_argument, NULL, 'e'}, { }, }; @@ -37,11 +38,13 @@ int cmd_set(int argc, char **argv) union { struct { int perf_bias:1; + int epp:1; }; int params; } params; int perf_bias = 0; int ret = 0; + char epp[30]; ret = uname(&uts); if (!ret && (!strcmp(uts.machine, "ppc64le") || @@ -55,7 +58,7 @@ int cmd_set(int argc, char **argv) params.params = 0; /* parameter parsing */ - while ((ret = getopt_long(argc, argv, "b:", + while ((ret = getopt_long(argc, argv, "b:e:", set_opts, NULL)) != -1) { switch (ret) { case 'b': @@ -69,6 +72,15 @@ int cmd_set(int argc, char **argv) } params.perf_bias = 1; break; + case 'e': + if (params.epp) + print_wrong_arg_exit(); + if (sscanf(optarg, "%29s", epp) != 1) { + print_wrong_arg_exit(); + return -EINVAL; + } + params.epp = 1; + break; default: print_wrong_arg_exit(); } @@ -102,6 +114,15 @@ int cmd_set(int argc, char **argv) break; } } + + if (params.epp) { + ret = cpupower_set_epp(cpu, epp); + if (ret) { + fprintf(stderr, + "Error setting epp value on CPU %d\n", cpu); + break; + } + } } return ret; } diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h index 96e4bede078b..5d998de2d291 100644 --- a/tools/power/cpupower/utils/helpers/helpers.h +++ b/tools/power/cpupower/utils/helpers/helpers.h @@ -116,6 +116,8 @@ extern int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val); extern int cpupower_intel_get_perf_bias(unsigned int cpu); extern unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu); +extern int cpupower_set_epp(unsigned int cpu, char *epp); + /* Read/Write msr ****************************/ /* PCI stuff ****************************/ @@ -173,6 +175,9 @@ static inline int cpupower_intel_get_perf_bias(unsigned int cpu) static inline unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu) { return 0; }; +static inline int cpupower_set_epp(unsigned int cpu, char *epp) +{ return -1; }; + /* Read/Write msr ****************************/ static inline int cpufreq_has_boost_support(unsigned int cpu, int *support, diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c index 21f653cd472c..63c3f26ef874 100644 --- a/tools/power/cpupower/utils/helpers/misc.c +++ b/tools/power/cpupower/utils/helpers/misc.c @@ -87,6 +87,25 @@ int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val) return 0; } +int cpupower_set_epp(unsigned int cpu, char *epp) +{ + char path[SYSFS_PATH_MAX]; + char linebuf[30] = {}; + + snprintf(path, sizeof(path), + PATH_TO_CPU "cpu%u/cpufreq/energy_performance_preference", cpu); + + if (!is_valid_path(path)) + return -1; + + snprintf(linebuf, sizeof(linebuf), "%s", epp); + + if (cpupower_write_sysfs(path, linebuf, 30) <= 0) + return -1; + + return 0; +} + bool cpupower_amd_pstate_enabled(void) { char *driver = cpufreq_get_driver(0);