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Wed, 18 Mar 2026 09:09:00 -0500 From: Alex Deucher To: CC: Alex Deucher Subject: [PATCH 09/16] drm/amdgpu/gfx8: rework kernel queue priority handling Date: Wed, 18 Mar 2026 10:08:30 -0400 Message-ID: <20260318140837.582776-9-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: CO1PEPF00012E64:EE_|PH0PR12MB7471:EE_ X-MS-Office365-Filtering-Correlation-Id: da5a09e9-1d07-421a-1a71-08de84f7e765 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|376014|82310400026|36860700016|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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00012E64.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB7471 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_v8_0.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 130196859ff3f..49999bdb13499 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -4535,7 +4535,10 @@ static int gfx_v8_0_mqd_init(struct amdgpu_ring *ring) tmp = RREG32(mmCP_HQD_QUANTUM); tmp = REG_SET_FIELD(tmp, 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, 10); + if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring)) + tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 20); + else + tmp = REG_SET_FIELD(tmp, CP_HQD_QUANTUM, QUANTUM_DURATION, 10); mqd->cp_hqd_quantum = tmp; /* map_queues packet doesn't need activate the queue, -- 2.53.0