From patchwork Tue Jun 20 23:01:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Pandruvada X-Patchwork-Id: 694662 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0BBE8EB64D7 for ; Tue, 20 Jun 2023 23:02:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230089AbjFTXCC (ORCPT ); Tue, 20 Jun 2023 19:02:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230027AbjFTXB6 (ORCPT ); Tue, 20 Jun 2023 19:01:58 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2191219B; Tue, 20 Jun 2023 16:01:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687302117; x=1718838117; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=xOPnzUp7CuyZvBUd8tWM9+6hiuInfL7osBFcWmep3ps=; b=MBxu0Dx/VUkKp4R3Rvvzj87gxGZTqQNnDnNp4FtuM7L5seGwC1oCiReQ vb5DMq+HZKlqHw2yViDdxsOn0utIUd032tH0U447jZCieUrZdvJuwuhbS PTsVFj6kCP9KTXfjSl2B1IIgepkXVTozlNb5yrONwRjXiOM0+h6/L6i4+ 0av8JZ/Kkolg5zxY6pp51o2qs3V83B/HyeeEwO0wPW9nOGl31wkiRimcv htcdwM1kFIw2VuZLfTne1gqAbCXdIMCg+r3+5iIefZcEfjdA8T8Kp5et8 h94AUY3Z9wTRYCN9vro+SKKZEIAjYlbzRJjIJ+cCekJJIXt9uRP++DZFH Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="340347306" X-IronPort-AV: E=Sophos;i="6.00,258,1681196400"; d="scan'208";a="340347306" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2023 16:01:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="1044465342" X-IronPort-AV: E=Sophos;i="6.00,258,1681196400"; d="scan'208";a="1044465342" Received: from spandruv-desk.jf.intel.com ([10.54.75.8]) by fmsmga005.fm.intel.com with ESMTP; 20 Jun 2023 16:01:55 -0700 From: Srinivas Pandruvada To: rafael@kernel.org, rui.zhang@intel.com, daniel.lezcano@linaro.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH 7/7] selftests/thermel/intel: Add test to read workload hint Date: Tue, 20 Jun 2023 16:01:50 -0700 Message-Id: <20230620230150.3068704-8-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230620230150.3068704-1-srinivas.pandruvada@linux.intel.com> References: <20230620230150.3068704-1-srinivas.pandruvada@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Some SoCs have in built firmware support to classify current running workload and pass to OS for making power management decisions. This test program waits for notification of workload type change and prints. This program can be used to test this feature and also allows other user space programs to use as a reference. Signed-off-by: Srinivas Pandruvada --- .../testing/selftests/thermal/intel/Makefile | 16 +++ .../thermal/intel/workload_hint_test.c | 114 ++++++++++++++++++ 2 files changed, 130 insertions(+) create mode 100644 tools/testing/selftests/thermal/intel/Makefile create mode 100644 tools/testing/selftests/thermal/intel/workload_hint_test.c diff --git a/tools/testing/selftests/thermal/intel/Makefile b/tools/testing/selftests/thermal/intel/Makefile new file mode 100644 index 000000000000..02459e271ef7 --- /dev/null +++ b/tools/testing/selftests/thermal/intel/Makefile @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0 +ifndef CROSS_COMPILE +uname_M := $(shell uname -m 2>/dev/null || echo not) +ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) + +ifeq ($(ARCH),x86) +TEST_PROGS := workload_hint_test + +all: $(TEST_PROGS) + +include ../../lib.mk + +clean: + rm -fr $(TEST_PROGS) +endif +endif diff --git a/tools/testing/selftests/thermal/intel/workload_hint_test.c b/tools/testing/selftests/thermal/intel/workload_hint_test.c new file mode 100644 index 000000000000..69a48a8ccbb4 --- /dev/null +++ b/tools/testing/selftests/thermal/intel/workload_hint_test.c @@ -0,0 +1,114 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE + +#include +#include +#include +#include +#include +#include + +#define WORKLOAD_NOTIFICATION_DELAY_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/workload_hint/notification_delay_ms" +#define WORKLOAD_ENABLE_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/workload_hint/workload_hint_enable" +#define WORKLOAD_TYPE_INDEX_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/workload_hint/workload_type_index" + +static const char * const workload_types[] = { + "idle", + "battery_life", + "sustained", + "bursty", + NULL +}; + +#define WORKLOAD_TYPE_MAX_INDEX 3 + +int main(int argc, char **argv) { + struct pollfd ufd; + char index_str[4]; + int fd, ret, index; + int delay = 0; + + if (argc > 1) { + char delay_str[64]; + + sscanf(argv[1], "%d", &delay); + printf("Setting notification delay to %d ms\n", delay); + + if (delay < 0) + exit(1); + + sprintf(delay_str, "%s\n", argv[1]); + + if ((fd = open(WORKLOAD_NOTIFICATION_DELAY_ATTRIBUTE, O_RDWR)) < 0) { + perror("Unable to open workload notification delay\n"); + exit(1); + } + + if (write(fd, delay_str, strlen(delay_str)) < 0) { + perror("Can't set delay\n"); + exit(1); + } + + close(fd); + + } + + /* Enable feature via sysfs knob */ + if ((fd = open(WORKLOAD_ENABLE_ATTRIBUTE, O_RDWR)) < 0) { + perror("Unable to open workload type feature enable file\n"); + exit(1); + } + + if (write(fd, "1\n", 2) < 0) { + perror("Can' enable workload hints\n"); + exit(1); + } + + close(fd); + + while (1) { + if ((fd = open(WORKLOAD_TYPE_INDEX_ATTRIBUTE, O_RDONLY)) < 0) { + perror("Unable to open workload type file\n"); + exit(1); + } + + if ((lseek(fd, 0L, SEEK_SET)) < 0) { + fprintf(stderr, "Failed to set pointer to beginning\n"); + exit(1); + } + + if (read(fd, index_str, sizeof(index_str)) < 0) { + fprintf(stderr, "Failed to read from:%s\n", + WORKLOAD_TYPE_INDEX_ATTRIBUTE); + exit(1); + } + + ufd.fd = fd; + ufd.events = POLLPRI; + + if ((ret = poll(&ufd, 1, -1)) < 0) { + perror("poll error"); + exit(1); + } else if (ret == 0) { + printf("Poll Timeout\n"); + } else { + if ((lseek(fd, 0L, SEEK_SET)) < 0) { + fprintf(stderr, "Failed to set pointer to beginning\n"); + exit(1); + } + + if (read(fd, index_str, sizeof(index_str)) < 0) { + exit(0); + } + + sscanf(index_str, "%d", &index); + if (index > WORKLOAD_TYPE_MAX_INDEX) + printf("Invalid workload type index\n"); + else + printf("workload type:%s\n", workload_types[index]); + } + + close(fd); + } +}