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Wed, 18 Mar 2026 09:09:02 -0500 From: Alex Deucher To: CC: Alex Deucher Subject: [PATCH 15/16] drm/amdgpu/gfx12.1: rework kernel queue priority handling Date: Wed, 18 Mar 2026 10:08:36 -0400 Message-ID: <20260318140837.582776-15-alexander.deucher@amd.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260318140837.582776-1-alexander.deucher@amd.com> References: <20260318140837.582776-1-alexander.deucher@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN1PEPF0000ECD8:EE_|CH3PR12MB9147:EE_ X-MS-Office365-Filtering-Correlation-Id: a478c961-39f0-40da-af8f-08de84f7ea4e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|376014|36860700016|82310400026|22082099003|56012099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; 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Ip=[165.204.84.17]; Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MN1PEPF0000ECD8.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9147 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" Rather than setting a higher queue priority which could starve a lower priority queue, enable longer quantums for high priority kernel queues. This will avoid starvation, but provide longer runtime for high priority queues. Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gfx_v12_1.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v12_1.c b/drivers/gpu/drm/amd/amdgpu/gfx_v12_1.c index 98dc6582b7aa6..2fac3f99da644 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v12_1.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v12_1.c @@ -2248,7 +2248,12 @@ static int gfx_v12_1_compute_mqd_init(struct amdgpu_device *adev, void *m, tmp = REG_SET_FIELD(0, CP_HQD_QUANTUM, QUANTUM_EN, 1); tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_SCALE, 1); - tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 1); + /* increase the duration of a high priority kernel queue */ + if (prop->kernel_queue && + (prop->hqd_pipe_priority == AMDGPU_GFX_PIPE_PRIO_HIGH)) + tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 2); + else + tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 1); mqd->cp_hqd_quantum = tmp; mqd->cp_hqd_active = prop->hqd_active; -- 2.53.0