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d="scan'208";a="131216570" Received: from lstrano-desk.jf.intel.com ([10.54.39.91]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Apr 2025 21:12:23 -0700 From: Matthew Brost To: intel-xe@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, thomas.hellstrom@linux.intel.com, himal.prasad.ghimiray@intel.com Subject: [PATCH v2 5/5] drm/xe: Add atomic_svm_timeslice_ms debugfs entry Date: Wed, 16 Apr 2025 21:13:40 -0700 Message-Id: <20250417041340.479973-6-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250417041340.479973-1-matthew.brost@intel.com> References: <20250417041340.479973-1-matthew.brost@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Add some informal control for atomic SVM fault GPU timeslice to be able to play around with values and tweak performance. v2: - Reduce timeslice default value to 5ms Signed-off-by: Matthew Brost --- drivers/gpu/drm/xe/xe_debugfs.c | 38 ++++++++++++++++++++++++++++ drivers/gpu/drm/xe/xe_device.c | 1 + drivers/gpu/drm/xe/xe_device_types.h | 3 +++ drivers/gpu/drm/xe/xe_svm.c | 2 +- 4 files changed, 43 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c index d0503959a8ed..d83cd6ed3fa8 100644 --- a/drivers/gpu/drm/xe/xe_debugfs.c +++ b/drivers/gpu/drm/xe/xe_debugfs.c @@ -191,6 +191,41 @@ static const struct file_operations wedged_mode_fops = { .write = wedged_mode_set, }; +static ssize_t atomic_svm_timeslice_ms_show(struct file *f, char __user *ubuf, + size_t size, loff_t *pos) +{ + struct xe_device *xe = file_inode(f)->i_private; + char buf[32]; + int len = 0; + + len = scnprintf(buf, sizeof(buf), "%d\n", xe->atomic_svm_timeslice_ms); + + return simple_read_from_buffer(ubuf, size, pos, buf, len); +} + +static ssize_t atomic_svm_timeslice_ms_set(struct file *f, + const char __user *ubuf, + size_t size, loff_t *pos) +{ + struct xe_device *xe = file_inode(f)->i_private; + u32 atomic_svm_timeslice_ms; + ssize_t ret; + + ret = kstrtouint_from_user(ubuf, size, 0, &atomic_svm_timeslice_ms); + if (ret) + return ret; + + xe->atomic_svm_timeslice_ms = atomic_svm_timeslice_ms; + + return size; +} + +static const struct file_operations atomic_svm_timeslice_ms_fops = { + .owner = THIS_MODULE, + .read = atomic_svm_timeslice_ms_show, + .write = atomic_svm_timeslice_ms_set, +}; + void xe_debugfs_register(struct xe_device *xe) { struct ttm_device *bdev = &xe->ttm; @@ -211,6 +246,9 @@ void xe_debugfs_register(struct xe_device *xe) debugfs_create_file("wedged_mode", 0600, root, xe, &wedged_mode_fops); + debugfs_create_file("atomic_svm_timeslice_ms", 0600, root, xe, + &atomic_svm_timeslice_ms_fops); + for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) { man = ttm_manager_type(bdev, mem_type); diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c index 75e753e0a682..abf3c72baaa6 100644 --- a/drivers/gpu/drm/xe/xe_device.c +++ b/drivers/gpu/drm/xe/xe_device.c @@ -444,6 +444,7 @@ struct xe_device *xe_device_create(struct pci_dev *pdev, xe->info.devid = pdev->device; xe->info.revid = pdev->revision; xe->info.force_execlist = xe_modparam.force_execlist; + xe->atomic_svm_timeslice_ms = 5; err = xe_irq_init(xe); if (err) diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h index b9a892c44c67..6f5222f42410 100644 --- a/drivers/gpu/drm/xe/xe_device_types.h +++ b/drivers/gpu/drm/xe/xe_device_types.h @@ -567,6 +567,9 @@ struct xe_device { /** @pmu: performance monitoring unit */ struct xe_pmu pmu; + /** @atomic_svm_timeslice_ms: Atomic SVM fault timeslice MS */ + u32 atomic_svm_timeslice_ms; + #ifdef TEST_VM_OPS_ERROR /** * @vm_inject_error_position: inject errors at different places in VM diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c index 4b0e0820153a..fe803216451a 100644 --- a/drivers/gpu/drm/xe/xe_svm.c +++ b/drivers/gpu/drm/xe/xe_svm.c @@ -780,7 +780,7 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, .check_pages_threshold = IS_DGFX(vm->xe) && IS_ENABLED(CONFIG_DRM_XE_DEVMEM_MIRROR) ? SZ_64K : 0, .vram_only = atomic, - .timeslice_ms = atomic ? 5 : 0, + .timeslice_ms = atomic ? vm->xe->atomic_svm_timeslice_ms : 0, }; struct xe_svm_range *range; struct drm_gpusvm_range *r; -- 2.34.1