linux-kernel - [PATCH 2/3] tools/power/x86/intel-speed-select: Turbo-freq feature auto mode

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Date:   Mon, 23 Sep 2019 11:59:05 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     andriy.shevchenko@...el.com
Cc:     prarit@...hat.com, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 2/3] tools/power/x86/intel-speed-select: Turbo-freq feature auto mode

Introduce --auto|-a option to turbo-freq enable feature, so that it
does in one step for users who are OK by setting all passed target cores
as high priority and set in CLOS 0 and remaining in CLOS 3. In this way,
users don't have to take multiple steps to enable turbo-freq feature. For
users who want more fine grain control, they can always use core-power
feature to set custom CLOS configuration and assignment.

While here also print the error to output when clos configuration fails.

For example
intel-speed-select -c 0-4 turbo-freq enable --auto

The above command will enable turbo-freq and core-power feature. Also
mark CPU 0 to CPU 4 as high priority.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
 .../x86/intel-speed-select/isst-config.c      | 79 ++++++++++++++++---
 1 file changed, 69 insertions(+), 10 deletions(-)

diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c
index 5da59ff47306..edc4c50853bd 100644
--- a/tools/power/x86/intel-speed-select/isst-config.c
+++ b/tools/power/x86/intel-speed-select/isst-config.c
@@ -1163,19 +1163,24 @@ static void set_fact_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
 			isst_set_trl_from_current_tdp(cpu, fact_trl);
 			isst_display_result(cpu, outf, "turbo-freq", "disable",
 					    ret);
+			if (auto_mode)
+				isst_pm_qos_config(cpu, 0, 0);
 		}
 	}
 }
 
 static void set_fact_enable(void)
 {
-	int status = 1;
+	int status = 1, i, j, ret;
 
 	if (cmd_help) {
 		fprintf(stderr,
 			"Enable Intel Speed Select Technology Turbo frequency feature\n");
 		fprintf(stderr,
 			"Optional: -t|--trl : Specify turbo ratio limit\n");
+		fprintf(stderr,
+			"\tOptional Arguments: -a|--auto : Designate specified target CPUs with");
+		fprintf(stderr, "-C|--cpu option as as high priority using core-power feature\n");
 		exit(0);
 	}
 
@@ -1187,6 +1192,59 @@ static void set_fact_enable(void)
 		for_each_online_package_in_set(set_fact_for_cpu, NULL, NULL,
 					       NULL, &status);
 	isst_ctdp_display_information_end(outf);
+
+	if (auto_mode) {
+		for (i = 0; i < get_topo_max_cpus(); ++i) {
+			int clos;
+
+			if (!CPU_ISSET_S(i, present_cpumask_size, present_cpumask))
+				continue;
+
+			ret = set_clos_param(i, 0, 0, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			ret = set_clos_param(i, 1, 15, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			ret = set_clos_param(i, 2, 15, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			ret = set_clos_param(i, 3, 15, 0, 0, 0xff);
+			if (ret)
+				goto error_disp;
+
+			if (CPU_ISSET_S(i, target_cpumask_size, target_cpumask))
+				clos = 0;
+			else
+				clos = 3;
+
+			ret = isst_pm_qos_config(i, 1, 1);
+			if (ret)
+				goto error_disable;
+
+			debug_printf("Associate cpu: %d clos: %d\n", i, clos);
+			ret = isst_clos_associate(i, clos);
+			if (ret)
+				goto error_disp;
+		}
+		isst_display_result(i, outf, "turbo-freq --auto", "enable", 0);
+	}
+
+	return;
+
+error_disable:
+	for (j = 0; j < i; ++j) {
+		if (!CPU_ISSET_S(j, present_cpumask_size, present_cpumask))
+				continue;
+
+		isst_pm_qos_config(j, 0, 0);
+	}
+error_disp:
+	isst_display_result(i, outf, "turbo-freq --auto", "enable", ret);
+
 }
 
 static void set_fact_disable(void)
@@ -1198,6 +1256,8 @@ static void set_fact_disable(void)
 			"Disable Intel Speed Select Technology turbo frequency feature\n");
 		fprintf(stderr,
 			"Optional: -t|--trl : Specify turbo ratio limit\n");
+		fprintf(stderr,
+			"\tOptional Arguments: -a|--auto : Also disable core-power associations\n");
 		exit(0);
 	}
 
@@ -1218,16 +1278,15 @@ static void enable_clos_qos_config(int cpu, void *arg1, void *arg2, void *arg3,
 	int status = *(int *)arg4;
 
 	ret = isst_pm_qos_config(cpu, status, clos_priority_type);
-	if (ret) {
+	if (ret)
 		perror("isst_pm_qos_config");
-	} else {
-		if (status)
-			isst_display_result(cpu, outf, "core-power", "enable",
-					    ret);
-		else
-			isst_display_result(cpu, outf, "core-power", "disable",
-					    ret);
-	}
+
+	if (status)
+		isst_display_result(cpu, outf, "core-power", "enable",
+				    ret);
+	else
+		isst_display_result(cpu, outf, "core-power", "disable",
+				    ret);
 }
 
 static void set_clos_enable(void)
-- 
2.17.2