From mboxrd@z Thu Jan 1 00:00:00 1970 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 picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2D756103A9A8 for ; Wed, 25 Mar 2026 10:57:47 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id D07463E2FFA for ; Wed, 25 Mar 2026 11:57:45 +0100 (CET) Received: from in-2.smtp.seeweb.it (in-2.smtp.seeweb.it [IPv6:2001:4b78:1:20::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id BF6FC3E2AD0 for ; Wed, 25 Mar 2026 11:57:28 +0100 (CET) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by in-2.smtp.seeweb.it (Postfix) with ESMTPS id 1310960207D for ; Wed, 25 Mar 2026 11:57:26 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774436247; x=1805972247; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=rPEjcRvpBkwuxe0Na+ggF6jGnfGBGY433fQUSt9wxaM=; b=Vu+2GPsegPLvg1aQVIuUyLoCcPis3LOvUiYfQs4ufDvs4iCni0qHB22Q Mun9I7uX2dHFUYEb2dqH91WHg+3KU7gkzdvUqqHTmzRSsjgORRLTEJ161 41KgoyakTuQrqdD4YFgzJ5dpg5zYboF5V1sMoPst2aoFKW41FGDEx6wUu 9RD5WMOoiH3dvqzy0N2QVdQ0aFz2snWkHXh6zUponFQ+FgbFQauFBxKmK f6KSWCKS7TDAIvRmqQizWrAS6aDcIBn9aZoIymI4sZVuIQ/ko9wUg58cZ 6/ksfY10iSuP3dPj61hyPKW1RKXM17CS4YA3W03agmyKhyZCQ1PjD458H w==; X-CSE-ConnectionGUID: ClOpsZMETtiLniIW/oF4mg== X-CSE-MsgGUID: os7yN/wKQ9Ks+TGwamun7g== X-IronPort-AV: E=McAfee;i="6800,10657,11739"; a="100916111" X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="100916111" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 03:57:24 -0700 X-CSE-ConnectionGUID: E/YpikEET6i6kuUbmjMMlA== X-CSE-MsgGUID: s/lvqX0URWauraez28PcRQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,140,1770624000"; d="scan'208";a="223856375" Received: from pkubaj-desk.igk.intel.com (HELO intel.com) ([10.217.160.221]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2026 03:57:22 -0700 From: Piotr Kubaj To: ltp@lists.linux.it Date: Wed, 25 Mar 2026 11:55:34 +0100 Message-ID: <20260325105533.259287-2-piotr.kubaj@intel.com> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 1.0.9 at in-2.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH v14] thermal: add new test group X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: helena.anna.dubel@intel.com, tomasz.ossowski@intel.com, rafael.j.wysocki@intel.com, daniel.niestepski@intel.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Currently consists of only one test for the CPU package thermal sensor interface for Intel platforms. It works by checking the initial count of thermal interrupts. Then it decreases the threshold for sending a thermal interrupt to just above the current temperature and runs a workload on the CPU. Finally, it restores the original thermal threshold and checks whether the number of thermal interrupts increased. Signed-off-by: Piotr Kubaj --- Addresses Andrea's feedback, adding support for testing all the matching thermal zones. runtest/thermal | 3 + testcases/kernel/Makefile | 1 + testcases/kernel/thermal/.gitignore | 1 + testcases/kernel/thermal/Makefile | 9 + .../kernel/thermal/thermal_interrupt_events.c | 230 ++++++++++++++++++ 5 files changed, 244 insertions(+) create mode 100644 runtest/thermal create mode 100644 testcases/kernel/thermal/.gitignore create mode 100644 testcases/kernel/thermal/Makefile create mode 100644 testcases/kernel/thermal/thermal_interrupt_events.c diff --git a/runtest/thermal b/runtest/thermal new file mode 100644 index 000000000..57e3d29f8 --- /dev/null +++ b/runtest/thermal @@ -0,0 +1,3 @@ +# Thermal driver API +# https://docs.kernel.org/driver-api/thermal/ +thermal_interrupt_events thermal_interrupt_events diff --git a/testcases/kernel/Makefile b/testcases/kernel/Makefile index 98fd45a9d..ac816e4e8 100644 --- a/testcases/kernel/Makefile +++ b/testcases/kernel/Makefile @@ -36,6 +36,7 @@ SUBDIRS += connectors \ sched \ security \ sound \ + thermal \ tracing \ uevents \ watchqueue \ diff --git a/testcases/kernel/thermal/.gitignore b/testcases/kernel/thermal/.gitignore new file mode 100644 index 000000000..1090bdad8 --- /dev/null +++ b/testcases/kernel/thermal/.gitignore @@ -0,0 +1 @@ +thermal_interrupt_events diff --git a/testcases/kernel/thermal/Makefile b/testcases/kernel/thermal/Makefile new file mode 100644 index 000000000..4657c3fb3 --- /dev/null +++ b/testcases/kernel/thermal/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright (c) 2025, Intel Corporation. All rights reserved. +# Author:Piotr Kubaj + +top_srcdir ?= ../../.. + +include $(top_srcdir)/include/mk/testcases.mk + +include $(top_srcdir)/include/mk/generic_leaf_target.mk diff --git a/testcases/kernel/thermal/thermal_interrupt_events.c b/testcases/kernel/thermal/thermal_interrupt_events.c new file mode 100644 index 000000000..0317a0ff7 --- /dev/null +++ b/testcases/kernel/thermal/thermal_interrupt_events.c @@ -0,0 +1,230 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/* + * Copyright (C) 2026 Intel - http://www.intel.com/ + */ + +/*\ + * Tests the CPU package thermal sensor interface for Intel platforms. + + * Works by checking the initial count of thermal interrupts. Then it + * decreases the threshold for sending a thermal interrupt to just above + * the current temperature and runs a workload on the CPU. Finally, it restores + * the original thermal threshold and checks whether the number of thermal + * interrupts increased. + */ + +#include +#include "tst_safe_stdio.h" +#include "tst_test.h" +#include "tst_timer_test.h" + +#define RUNTIME 30 +#define SLEEP 10 +#define TEMP_INCREMENT 10 + +static bool x86_pkg_temp_tz_found, *x86_pkg_temp_tz; +static char temp_path[PATH_MAX], trip_path[PATH_MAX]; +static int nproc, temp_high, temp, trip, tz_counter; +static uint64_t *interrupt_init, *interrupt_later; + +static void read_interrupts(uint64_t *interrupts, const int nproc) +{ + bool interrupts_found = false; + char line[8192]; + + memset(interrupts, 0, nproc * sizeof(*interrupts)); + FILE *fp = SAFE_FOPEN("/proc/interrupts", "r"); + + while (fgets(line, sizeof(line), fp)) { + if (strstr(line, "Thermal event interrupts")) { + interrupts_found = true; + char *ptr = strchr(line, ':'); + + for (int i = 0; i < nproc; i++) { + char *endptr; + + while (*ptr && !isdigit(*ptr)) + ptr++; + + errno = 0; + + interrupts[i] = strtoull(ptr, &endptr, 10); + + if (ptr == endptr) + tst_brk(TBROK, "interrupt not found"); + + if (errno == ERANGE) + tst_brk(TCONF, "interrupt out of range"); + + ptr = endptr; + tst_res(TDEBUG, "interrupts[%d]: %ld", i, interrupts[i]); + } + break; + } + } + SAFE_FCLOSE(fp); + if (!interrupts_found) + tst_brk(TCONF, "No Thermal event interrupts line in /proc/interrupts"); +} + +static void setup(void) +{ + char line[8192]; + + nproc = tst_ncpus(); + tst_res(TDEBUG, "Number of logical cores: %d", nproc); + interrupt_init = calloc(nproc, sizeof(uint64_t)); + interrupt_later = calloc(nproc, sizeof(uint64_t)); + + DIR *dir = SAFE_OPENDIR("/sys/class/thermal/"); + struct dirent *entry; + + while ((entry = SAFE_READDIR(dir))) { + if ((!strncmp(entry->d_name, "thermal_zone", sizeof("thermal_zone") - 1))) + tz_counter++; + } + SAFE_CLOSEDIR(dir); + tst_res(TDEBUG, "Found %d thermal zone(s)", tz_counter); + + x86_pkg_temp_tz = calloc(tz_counter, sizeof(bool)); + + for (int i = 0; i < tz_counter; i++) { + char path[PATH_MAX]; + + snprintf(path, PATH_MAX, "/sys/class/thermal/thermal_zone%d/type", i); + tst_res(TDEBUG, "Checking whether %s is x86_pkg_temp", path); + + SAFE_FILE_SCANF(path, "%s", line); + if (strstr(line, "x86_pkg_temp")) { + tst_res(TDEBUG, "Thermal zone %d uses x86_pkg_temp", i); + x86_pkg_temp_tz[i] = true; + x86_pkg_temp_tz_found = true; + } + } + + if (!x86_pkg_temp_tz_found) + tst_brk(TCONF, "No thermal zone uses x86_pkg_temp"); +} + +static void *cpu_workload(double run_time) +{ + tst_timer_start(CLOCK_MONOTONIC); + int num = 2; + + while (!tst_timer_expired_ms(run_time * 1000)) { + for (int i = 2; i * i <= num; i++) { + if (num % i == 0) + break; + } + num++; + SAFE_FILE_SCANF(temp_path, "%d", &temp); + + if (temp > temp_high) + break; + } + return NULL; +} + +static void test_zone(int i) +{ + int sleep_time = SLEEP; + double run_time = RUNTIME; + + snprintf(temp_path, PATH_MAX, "/sys/class/thermal/thermal_zone%d/temp", i); + tst_res(TINFO, "Testing %s", temp_path); + SAFE_FILE_SCANF(temp_path, "%d", &temp); + if (temp < 0) + tst_brk(TBROK, "Unexpected zone temperature value %d", temp); + + tst_res(TDEBUG, "Current temperature for %s: %d", temp_path, temp); + + temp_high = temp + TEMP_INCREMENT; + + snprintf(trip_path, PATH_MAX, "/sys/class/thermal/thermal_zone%d/trip_point_1_temp", i); + + tst_res(TDEBUG, "Setting new trip_point_1_temp value: %d", temp_high); + SAFE_FILE_SCANF(trip_path, "%d", &trip); + SAFE_FILE_PRINTF(trip_path, "%d", temp_high); + + while (sleep_time > 0) { + tst_res(TDEBUG, "Running for %f seconds, then sleeping for %d seconds", run_time, sleep_time); + + for (int j = 0; j < nproc; j++) { + if (!SAFE_FORK()) { + cpu_workload(run_time); + exit(0); + } + } + + tst_reap_children(); + + SAFE_FILE_SCANF(temp_path, "%d", &temp); + tst_res(TDEBUG, "Temperature for %s after a test: %d", temp_path, temp); + + if (temp > temp_high) + break; + sleep(sleep_time--); + run_time -= 3; + } + +} + +static void cleanup(void) +{ + if (x86_pkg_temp_tz_found) { + for (int i = 0; i < tz_counter; i++) { + if (x86_pkg_temp_tz[i]) { + snprintf(trip_path, PATH_MAX, "/sys/class/thermal/thermal_zone%d/trip_point_1_temp", i); + SAFE_FILE_PRINTF(trip_path, "%d", trip); + } + } + } + + free(x86_pkg_temp_tz); + free(interrupt_init); + free(interrupt_later); +} + +static void run(void) +{ + for (int i = 0; i < tz_counter; i++) { + if (x86_pkg_temp_tz[i]) { + read_interrupts(interrupt_init, nproc); + test_zone(i); + read_interrupts(interrupt_later, nproc); + for (int i = 0; i < nproc; i++) { + if (interrupt_later[i] < interrupt_init[i]) + tst_res(TFAIL, "CPU %d interrupt counter: %ld (previous: %ld)", + i, interrupt_later[i], interrupt_init[i]); + } + if (temp <= temp_high) + tst_res(TFAIL, "Zone temperature is not rising as expected"); + else + tst_res(TPASS, "x86 package thermal interrupt triggered"); + } + } + +} + +static struct tst_test test = { + .cleanup = cleanup, + .forks_child = 1, + .needs_drivers = (const char *const []) { + "x86_pkg_temp_thermal", + NULL + }, + .min_runtime = 180, + .needs_root = 1, + .setup = setup, + .supported_archs = (const char *const []) { + "x86", + "x86_64", + NULL + }, + .tags = (const struct tst_tag[]) { + {"linux-git", "9635c586a559ba0e45b2bfbff79c937ddbaf1a62"}, + {} + }, + .test_all = run +}; 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