diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/1175-drm-amdkfd-use-a-high-priority-workqueue-for-IH-work.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/1175-drm-amdkfd-use-a-high-priority-workqueue-for-IH-work.patch | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/1175-drm-amdkfd-use-a-high-priority-workqueue-for-IH-work.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/1175-drm-amdkfd-use-a-high-priority-workqueue-for-IH-work.patch new file mode 100644 index 00000000..a536caf2 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/1175-drm-amdkfd-use-a-high-priority-workqueue-for-IH-work.patch @@ -0,0 +1,77 @@ +From e5258fa6ad6dd8840c6134e7fd51fac9125bca56 Mon Sep 17 00:00:00 2001 +From: Andres Rodriguez <andres.rodriguez@amd.com> +Date: Fri, 19 Aug 2016 20:06:26 -0400 +Subject: [PATCH 1175/4131] drm/amdkfd: use a high priority workqueue for IH + work + +In systems under heavy load the IH work may experience significant +scheduling delays. + +Under load + system workqueue: + Max Latency: 7.023695 ms + Avg Latency: 0.263994 ms + +Under load + high priority workqueue: + Max Latency: 1.162568 ms + Avg Latency: 0.163213 ms + +Further work is required to measure the impact of per-cpu settings on IH +performance. + +Change-Id: I6e871451f8d8a4817cef0b850c4e4722f114ffa3 +Signed-off-by: Andres Rodriguez <andres.rodriguez@amd.com> +--- + drivers/gpu/drm/amd/amdkfd/kfd_device.c | 2 +- + drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c | 3 ++- + drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 + + 3 files changed, 4 insertions(+), 2 deletions(-) + +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c +index 61c22a6..69b08a9 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c +@@ -686,7 +686,7 @@ void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry) + if (kfd->interrupts_active + && interrupt_is_wanted(kfd, ih_ring_entry) + && enqueue_ih_ring_entry(kfd, ih_ring_entry)) +- schedule_work(&kfd->interrupt_work); ++ queue_work(kfd->ih_wq, &kfd->interrupt_work); + + spin_unlock(&kfd->interrupt_lock); + } +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c +index 495e1ba..c939856 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c +@@ -61,6 +61,7 @@ int kfd_interrupt_init(struct kfd_dev *kfd) + return r; + } + ++ kfd->ih_wq = alloc_workqueue("KFD IH", WQ_HIGHPRI, 1); + spin_lock_init(&kfd->interrupt_lock); + + INIT_WORK(&kfd->interrupt_work, interrupt_wq); +@@ -95,7 +96,7 @@ void kfd_interrupt_exit(struct kfd_dev *kfd) + * work-queue items that will access interrupt_ring. New work items + * can't be created because we stopped interrupt handling above. + */ +- flush_work(&kfd->interrupt_work); ++ flush_workqueue(kfd->ih_wq); + + kfifo_free(&kfd->ih_fifo); + } +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +index 31a24ae..696cf83 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +@@ -249,6 +249,7 @@ struct kfd_dev { + + /* Interrupts */ + struct kfifo ih_fifo; ++ struct workqueue_struct *ih_wq; + struct work_struct interrupt_work; + spinlock_t interrupt_lock; + +-- +2.7.4 + |