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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 AED3C10A88E0 for ; Thu, 26 Mar 2026 16:11:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6081610EB32; Thu, 26 Mar 2026 16:11:12 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="d3Xyu0Z9"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) by gabe.freedesktop.org (Postfix) with ESMTPS id D7C5C10E25F for ; Thu, 26 Mar 2026 16:10:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774541430; x=1806077430; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2RS6wOVdbOLCX299nClWSxhsmecoc5CdaoePzKk1r/I=; b=d3Xyu0Z9vL7zX9QldeNuJ7SdsnLrBKFnm8cXLmmuKRIqALdGQ3DXgDcJ AW3aHcmXokREFfSXyu8qYvcJsa3b5yHKqrmWivK3z0uaOHxxYExLtr95p ei4BFzgjxkQbz3v1DGEaTsOiu6UTlOg/14u+V1r6oQFIG2heWeULMv/Nm kQIp05ZKgU2zHCCybIaiP4r4+FXtG2KYEz9euTfdX7YHW+rE4SGMwRI8B eCeXCYO+hF69Y2/J87eiW2nBQPS5w7Yfi0zw0GFpuGr/77sl4Ud9emSdw buaKOqB/KDj+LXcmfv0ED9OlpGmKYCxriK1spsZKc3MW8pH03RCc28Lgs w==; X-CSE-ConnectionGUID: LFvfRWybTOiIiX36Z9rhrw== X-CSE-MsgGUID: ZTnQp6T7S9uTbFTf21JTCQ== X-IronPort-AV: E=McAfee;i="6800,10657,11741"; a="75488972" X-IronPort-AV: E=Sophos;i="6.23,142,1770624000"; d="scan'208";a="75488972" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Mar 2026 09:10:30 -0700 X-CSE-ConnectionGUID: 7PMhQ0Y/TvqwtMYps0utzg== X-CSE-MsgGUID: auTSJcTOTdad5lyyT+uZtg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,142,1770624000"; d="scan'208";a="229505952" Received: from klitkey1-mobl1.ger.corp.intel.com (HELO fedora) ([10.245.245.251]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Mar 2026 09:10:29 -0700 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= To: igt-dev@lists.freedesktop.org Cc: dev@lankhorst.se, =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= Subject: [PATCH i-g-t 2/5] tests/cgroup_dmem: add dmem cgroup controller test Date: Thu, 26 Mar 2026 17:10:04 +0100 Message-ID: <20260326161007.39294-3-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260326161007.39294-1-thomas.hellstrom@linux.intel.com> References: <20260326161007.39294-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" Add a test that exercises the cgroup v2 dmem controller interface using the new igt_cgroup library. The test uses igt_simple_main and: - Skips if no dmem regions are registered (no cgroup v2 or no dmem-capable device). - Creates a sub-cgroup and moves the test process into it. - Enumerates all registered device memory regions and prints their capacity, system-wide current usage, per-cgroup current usage, and configured min, low and max limits. - Destroys the cgroup on completion. Assisted-by: GitHub Copilot:claude-sonnet-4.6 Signed-off-by: Thomas Hellström --- tests/cgroup_dmem.c | 92 +++++++++++++++++++++++++++++++++++++++++++++ tests/meson.build | 1 + 2 files changed, 93 insertions(+) create mode 100644 tests/cgroup_dmem.c diff --git a/tests/cgroup_dmem.c b/tests/cgroup_dmem.c new file mode 100644 index 000000000..442c965f9 --- /dev/null +++ b/tests/cgroup_dmem.c @@ -0,0 +1,92 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2025 Intel Corporation + */ + +/** + * TEST: cgroup dmem + * Description: Exercises the cgroup v2 dmem controller interface. Creates a + * cgroup, moves the process into it, enumerates all dmem regions, + * prints their capacity, system-wide current usage, per-cgroup + * current usage and configured limits, then destroys the cgroup. + * Category: Core + * Mega feature: General Core features + * Sub-category: uapi + * Functionality: cgroup + * Feature: dmem + * Test category: uapi + */ + +#include + +#include "igt.h" +#include "igt_cgroup.h" + +IGT_TEST_DESCRIPTION("Exercises the cgroup v2 dmem controller interface."); + +static void fmt_bytes(uint64_t v, char *buf, size_t len) +{ + if (v == IGT_CGROUP_DMEM_MAX) + snprintf(buf, len, "max"); + else + snprintf(buf, len, "%" PRIu64, v); +} + +int igt_simple_main() +{ + struct igt_cgroup *cg; + const char *region; + char **regions; + uint64_t capacity, sys_current, cg_current, min, low, max; + char cap_s[32], sys_s[32], cg_s[32]; + char min_s[32], low_s[32], max_s[32]; + int i; + + igt_require_f(igt_cgroup_dmem_available(), + "No dmem regions found; is cgroup v2 with the " + "dmem controller available?\n"); + + cg = igt_cgroup_new("igt-cgroup-dmem-test"); + igt_assert_f(cg, "Failed to create cgroup\n"); + + igt_cgroup_move_current(cg); + + regions = igt_cgroup_dmem_regions(); + igt_assert_f(regions, "Failed to enumerate dmem regions\n"); + + igt_info("%-40s %16s %16s %16s %16s %16s %16s\n", + "region", "capacity", "system-current", + "cgroup-current", "min", "low", "max"); + igt_info("%-40s %16s %16s %16s %16s %16s %16s\n", + "------", "--------", "--------------", + "--------------", "---", "---", "---"); + + for (i = 0; regions[i]; i++) { + region = regions[i]; + + igt_cgroup_dmem_get_capacity(region, &capacity); + fmt_bytes(capacity, cap_s, sizeof(cap_s)); + + igt_cgroup_dmem_get_system_current(region, &sys_current); + fmt_bytes(sys_current, sys_s, sizeof(sys_s)); + + igt_cgroup_dmem_get_current(cg, region, &cg_current); + fmt_bytes(cg_current, cg_s, sizeof(cg_s)); + + igt_cgroup_dmem_get_min(cg, region, &min); + fmt_bytes(min, min_s, sizeof(min_s)); + + igt_cgroup_dmem_get_low(cg, region, &low); + fmt_bytes(low, low_s, sizeof(low_s)); + + igt_cgroup_dmem_get_max(cg, region, &max); + fmt_bytes(max, max_s, sizeof(max_s)); + + igt_info("%-40s %16s %16s %16s %16s %16s %16s\n", + region, cap_s, sys_s, cg_s, + min_s, low_s, max_s); + } + + igt_cgroup_dmem_regions_free(regions); + igt_cgroup_free(cg); +} diff --git a/tests/meson.build b/tests/meson.build index cecb4a8ae..f2326d293 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -1,4 +1,5 @@ test_progs = [ + 'cgroup_dmem', 'core_auth', 'core_debugfs', 'core_getclient', -- 2.53.0