On Wed, 2025-01-29 at 11:52 -0800, Matthew Brost wrote:
> Useful to experiment with notifier size and how it affects
> performance.
>
> v3:
> - Pull missing changes including in following patch (Thomas)
>
> Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/xe/xe_module.c | 4 ++++
> drivers/gpu/drm/xe/xe_module.h | 1 +
> drivers/gpu/drm/xe/xe_svm.c | 4 +++-
> 3 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/xe/xe_module.c
> b/drivers/gpu/drm/xe/xe_module.c
> index 0f2c20e9204a..2126e99ede01 100644
> --- a/drivers/gpu/drm/xe/xe_module.c
> +++ b/drivers/gpu/drm/xe/xe_module.c
> @@ -25,9 +25,13 @@ struct xe_modparam xe_modparam = {
> .max_vfs = IS_ENABLED(CONFIG_DRM_XE_DEBUG) ? ~0 : 0,
> #endif
> .wedged_mode = 1,
> + .svm_notifier_size = 512,
> /* the rest are 0 by default */
> };
>
> +module_param_named(svm_notifier_size, xe_modparam.svm_notifier_size,
> uint, 0600);
> +MODULE_PARM_DESC(svm_notifier_size, "Set the svm notifier size(in
> MiB), must be pow2");
> +
> module_param_named_unsafe(force_execlist,
> xe_modparam.force_execlist, bool, 0444);
> MODULE_PARM_DESC(force_execlist, "Force Execlist submission");
>
> diff --git a/drivers/gpu/drm/xe/xe_module.h
> b/drivers/gpu/drm/xe/xe_module.h
> index 161a5e6f717f..5a3bfea8b7b4 100644
> --- a/drivers/gpu/drm/xe/xe_module.h
> +++ b/drivers/gpu/drm/xe/xe_module.h
> @@ -22,6 +22,7 @@ struct xe_modparam {
> unsigned int max_vfs;
> #endif
> int wedged_mode;
> + u32 svm_notifier_size;
> };
>
> extern struct xe_modparam xe_modparam;
> diff --git a/drivers/gpu/drm/xe/xe_svm.c
> b/drivers/gpu/drm/xe/xe_svm.c
> index 0df924ca8ed1..f291b2eb2073 100644
> --- a/drivers/gpu/drm/xe/xe_svm.c
> +++ b/drivers/gpu/drm/xe/xe_svm.c
> @@ -6,6 +6,7 @@
> #include "xe_bo.h"
> #include "xe_gt_tlb_invalidation.h"
> #include "xe_migrate.h"
> +#include "xe_module.h"
> #include "xe_pt.h"
> #include "xe_svm.h"
> #include "xe_ttm_vram_mgr.h"
> @@ -596,7 +597,8 @@ int xe_svm_init(struct xe_vm *vm)
>
> err = drm_gpusvm_init(&vm->svm.gpusvm, "Xe SVM", &vm->xe-
> >drm,
> current->mm, xe_svm_devm_owner(vm-
> >xe), 0,
> - vm->size, SZ_512M, &gpusvm_ops,
> fault_chunk_sizes,
> + vm->size,
> xe_modparam.svm_notifier_size * SZ_1M,
> + &gpusvm_ops, fault_chunk_sizes,
> ARRAY_SIZE(fault_chunk_sizes));
> if (err)
> return err;
