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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL6PEPF0001AB71.mail.protection.outlook.com (10.167.242.164) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7202.16 via Frontend Transport; Wed, 17 Jan 2024 18:44:19 +0000 Received: from patedamande.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Wed, 17 Jan 2024 12:44:16 -0600 From: Pierre-Eric Pelloux-Prayer To: Sumit Semwal , Gustavo Padovan , =?utf-8?q?Christian_K=C3=B6nig?= , Steven Rostedt , "Masami Hiramatsu" , Mathieu Desnoyers , , , , "Alex Deucher" , CC: Pierre-Eric Pelloux-Prayer Subject: [PATCH 1/2] tracing, dma-buf: add a trace_dma_fence_sync_to event Date: Wed, 17 Jan 2024 19:41:40 +0100 Message-ID: <20240117184329.479554-1-pierre-eric.pelloux-prayer@amd.com> X-Mailer: git-send-email 2.41.0 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB71:EE_|CH3PR12MB8460:EE_ X-MS-Office365-Filtering-Correlation-Id: 5ebcd6cd-fb6b-491a-632a-08dc178c50a0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2024 18:44:19.5004 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5ebcd6cd-fb6b-491a-632a-08dc178c50a0 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB71.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8460 This new event can be used to trace where a given dma_fence is added as a dependency of some other work. I plan to use it in amdgpu. Signed-off-by: Pierre-Eric Pelloux-Prayer --- drivers/dma-buf/dma-fence.c | 1 + include/trace/events/dma_fence.h | 34 ++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index e0fd99e61a2d..671a499a5ccd 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -23,6 +23,7 @@ EXPORT_TRACEPOINT_SYMBOL(dma_fence_emit); EXPORT_TRACEPOINT_SYMBOL(dma_fence_enable_signal); EXPORT_TRACEPOINT_SYMBOL(dma_fence_signaled); +EXPORT_TRACEPOINT_SYMBOL(dma_fence_sync_to); static DEFINE_SPINLOCK(dma_fence_stub_lock); static struct dma_fence dma_fence_stub; diff --git a/include/trace/events/dma_fence.h b/include/trace/events/dma_fence.h index 3963e79ca7b4..9b3875f7aa79 100644 --- a/include/trace/events/dma_fence.h +++ b/include/trace/events/dma_fence.h @@ -83,6 +83,40 @@ DEFINE_EVENT(dma_fence, dma_fence_wait_end, TP_ARGS(fence) ); +DECLARE_EVENT_CLASS(dma_fence_from, + + TP_PROTO(struct dma_fence *fence, const char *reason), + + TP_ARGS(fence, reason), + + TP_STRUCT__entry( + __string(driver, fence->ops->get_driver_name(fence)) + __string(timeline, fence->ops->get_timeline_name(fence)) + __field(unsigned int, context) + __field(unsigned int, seqno) + __string(reason, reason) + ), + + TP_fast_assign( + __assign_str(driver, fence->ops->get_driver_name(fence)); + __assign_str(timeline, fence->ops->get_timeline_name(fence)); + __entry->context = fence->context; + __entry->seqno = fence->seqno; + __assign_str(reason, reason); + ), + + TP_printk("driver=%s timeline=%s context=%u seqno=%u reason=%s", + __get_str(driver), __get_str(timeline), __entry->context, + __entry->seqno, __get_str(reason)) +); + +DEFINE_EVENT(dma_fence_from, dma_fence_sync_to, + + TP_PROTO(struct dma_fence *fence, const char *reason), + + TP_ARGS(fence, reason) +); + #endif /* _TRACE_DMA_FENCE_H */ /* This part must be outside protection */ From patchwork Wed Jan 17 18:41:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre-Eric Pelloux-Prayer X-Patchwork-Id: 13522106 Received: from NAM02-SN1-obe.outbound.protection.outlook.com (mail-sn1nam02on2068.outbound.protection.outlook.com [40.107.96.68]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9A8FC225A1; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2024 18:44:26.7123 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fe2bb92a-c644-4a99-d6f5-08dc178c54ec X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB77.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9343 This makes it possible to understand the dependencies between jobs. Possible usage of this trace: * stuttering issues like Mesa !9189 * incorrect synchronization: I don't have a link for this one, but having these events was very useful to debug a virtio-gpu / native-context / radeonsi sync issue I have prototype code using this in UMR, as can be see here: https://gitlab.freedesktop.org/tomstdenis/umr/-/merge_requests/37 The 'reason' param currently uses __func__ but I didn't add a macro for this because it'd be interesting to use more descriptive names for each use of amdgpu_fence_sync. Signed-off-by: Pierre-Eric Pelloux-Prayer --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 8 ++++---- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 14 +++++++------- drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 8 +++----- drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 4 ++-- drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 11 ++++++++--- drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h | 3 ++- drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c | 4 ++-- 7 files changed, 28 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index d17b2452cb1f..fde98e48c84b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -491,7 +491,7 @@ static int vm_update_pds(struct amdgpu_vm *vm, struct amdgpu_sync *sync) if (ret) return ret; - return amdgpu_sync_fence(sync, vm->last_update); + return amdgpu_sync_fence(sync, vm->last_update, __func__); } static uint64_t get_pte_flags(struct amdgpu_device *adev, struct kgd_mem *mem) @@ -1251,7 +1251,7 @@ static void unmap_bo_from_gpuvm(struct kgd_mem *mem, amdgpu_vm_clear_freed(adev, vm, &bo_va->last_pt_update); - amdgpu_sync_fence(sync, bo_va->last_pt_update); + amdgpu_sync_fence(sync, bo_va->last_pt_update, __func__); } static int update_gpuvm_pte(struct kgd_mem *mem, @@ -1273,7 +1273,7 @@ static int update_gpuvm_pte(struct kgd_mem *mem, return ret; } - return amdgpu_sync_fence(sync, bo_va->last_pt_update); + return amdgpu_sync_fence(sync, bo_va->last_pt_update, __func__); } static int map_bo_to_gpuvm(struct kgd_mem *mem, @@ -2910,7 +2910,7 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef) } dma_resv_for_each_fence(&cursor, bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL, fence) { - ret = amdgpu_sync_fence(&sync_obj, fence); + ret = amdgpu_sync_fence(&sync_obj, fence, __func__); if (ret) { pr_debug("Memory eviction: Sync BO fence failed. Try again\n"); goto validate_map_fail; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 6adeddfb3d56..6830892383c3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -423,7 +423,7 @@ static int amdgpu_cs_p2_dependencies(struct amdgpu_cs_parser *p, dma_fence_put(old); } - r = amdgpu_sync_fence(&p->sync, fence); + r = amdgpu_sync_fence(&p->sync, fence, __func__); dma_fence_put(fence); if (r) return r; @@ -445,7 +445,7 @@ static int amdgpu_syncobj_lookup_and_add(struct amdgpu_cs_parser *p, return r; } - r = amdgpu_sync_fence(&p->sync, fence); + r = amdgpu_sync_fence(&p->sync, fence, __func__); dma_fence_put(fence); return r; } @@ -1101,7 +1101,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p) if (r) return r; - r = amdgpu_sync_fence(&p->sync, fpriv->prt_va->last_pt_update); + r = amdgpu_sync_fence(&p->sync, fpriv->prt_va->last_pt_update, __func__); if (r) return r; @@ -1112,7 +1112,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p) if (r) return r; - r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update); + r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update, __func__); if (r) return r; } @@ -1131,7 +1131,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p) if (r) return r; - r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update); + r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update, __func__); if (r) return r; } @@ -1144,7 +1144,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p) if (r) return r; - r = amdgpu_sync_fence(&p->sync, vm->last_update); + r = amdgpu_sync_fence(&p->sync, vm->last_update, __func__); if (r) return r; @@ -1225,7 +1225,7 @@ static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p) continue; } - r = amdgpu_sync_fence(&p->gang_leader->explicit_sync, fence); + r = amdgpu_sync_fence(&p->gang_leader->explicit_sync, fence, __func__); dma_fence_put(fence); if (r) return r; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c index ddd0891da116..96f68e025d8e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c @@ -309,7 +309,7 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm, /* Good we can use this VMID. Remember this submission as * user of the VMID. */ - r = amdgpu_sync_fence(&(*id)->active, &job->base.s_fence->finished); + r = amdgpu_sync_fence(&(*id)->active, &job->base.s_fence->finished, __func__); if (r) return r; @@ -369,8 +369,7 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm, /* Good, we can use this VMID. Remember this submission as * user of the VMID. */ - r = amdgpu_sync_fence(&(*id)->active, - &job->base.s_fence->finished); + r = amdgpu_sync_fence(&(*id)->active, &job->base.s_fence->finished, __func__); if (r) return r; @@ -421,8 +420,7 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring, id = idle; /* Remember this submission as user of the VMID */ - r = amdgpu_sync_fence(&id->active, - &job->base.s_fence->finished); + r = amdgpu_sync_fence(&id->active, &job->base.s_fence->finished, __func__); if (r) goto error; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c index da48b6da0107..0f85370f69fa 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c @@ -1219,14 +1219,14 @@ int amdgpu_mes_ctx_map_meta_data(struct amdgpu_device *adev, DRM_ERROR("failed to do vm_bo_update on meta data\n"); goto error_del_bo_va; } - amdgpu_sync_fence(&sync, bo_va->last_pt_update); + amdgpu_sync_fence(&sync, bo_va->last_pt_update, __func__); r = amdgpu_vm_update_pdes(adev, vm, false); if (r) { DRM_ERROR("failed to update pdes on meta data\n"); goto error_del_bo_va; } - amdgpu_sync_fence(&sync, vm->last_update); + amdgpu_sync_fence(&sync, vm->last_update, __func__); amdgpu_sync_wait(&sync, false); drm_exec_fini(&exec); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c index 1b013a44ca99..b6538f73eee9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c @@ -30,6 +30,7 @@ */ #include +#include #include "amdgpu.h" #include "amdgpu_trace.h" @@ -149,10 +150,12 @@ static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f) * * @sync: sync object to add fence to * @f: fence to sync to + * @reason: why do we sync to this fence * * Add the fence to the sync object. */ -int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f) +int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f, + const char *reason) { struct amdgpu_sync_entry *e; @@ -166,6 +169,8 @@ int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f) if (!e) return -ENOMEM; + trace_dma_fence_sync_to(f, reason); + hash_add(sync->fences, &e->node, f->context); e->fence = dma_fence_get(f); return 0; @@ -249,7 +254,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync, struct dma_fence *tmp = dma_fence_chain_contained(f); if (amdgpu_sync_test_fence(adev, mode, owner, tmp)) { - r = amdgpu_sync_fence(sync, f); + r = amdgpu_sync_fence(sync, f, __func__); dma_fence_put(f); if (r) return r; @@ -358,7 +363,7 @@ int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone) hash_for_each_safe(source->fences, i, tmp, e, node) { f = e->fence; if (!dma_fence_is_signaled(f)) { - r = amdgpu_sync_fence(clone, f); + r = amdgpu_sync_fence(clone, f, __func__); if (r) return r; } else { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h index cf1e9e858efd..0c58d6120053 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h @@ -47,7 +47,8 @@ struct amdgpu_sync { }; void amdgpu_sync_create(struct amdgpu_sync *sync); -int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f); +int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f, + const char *reason); int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync, struct dma_resv *resv, enum amdgpu_sync_mode mode, void *owner); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c index bfbf59326ee1..5e30b371b956 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c @@ -117,13 +117,13 @@ static int map_ring_data(struct amdgpu_device *adev, struct amdgpu_vm *vm, if (r) goto error_del_bo_va; - amdgpu_sync_fence(&sync, (*bo_va)->last_pt_update); + amdgpu_sync_fence(&sync, (*bo_va)->last_pt_update, __func__); r = amdgpu_vm_update_pdes(adev, vm, false); if (r) goto error_del_bo_va; - amdgpu_sync_fence(&sync, vm->last_update); + amdgpu_sync_fence(&sync, vm->last_update, __func__); amdgpu_sync_wait(&sync, false); drm_exec_fini(&exec);