From: Praveen Diwakar <[email protected]> This patch gives us the active pending request count which is yet to be submitted to the GPU
V2: * Change 64-bit to atomic for request count. (Tvrtko Ursulin) V3: * Remove mutex for request count. * Rebase. * Fixes hitting underflow for predictive request. (Tvrtko Ursulin) V4: * Rebase. Cc: Aravindan Muthukumar <[email protected]> Cc: Kedar J Karanje <[email protected]> Cc: Yogesh Marathe <[email protected]> Signed-off-by: Praveen Diwakar <[email protected]> Signed-off-by: Ankit Navik <[email protected]> --- drivers/gpu/drm/i915/i915_gem_context.c | 1 + drivers/gpu/drm/i915/i915_gem_context.h | 5 +++++ drivers/gpu/drm/i915/i915_gem_execbuffer.c | 2 ++ drivers/gpu/drm/i915/intel_lrc.c | 3 +++ 4 files changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 280813a..a5876fe 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -453,6 +453,7 @@ i915_gem_create_context(struct drm_i915_private *dev_priv, } trace_i915_context_create(ctx); + atomic_set(&ctx->req_cnt, 0); return ctx; } diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h index ca150a7..c940168 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.h +++ b/drivers/gpu/drm/i915/i915_gem_context.h @@ -227,6 +227,11 @@ struct i915_gem_context { * context close. */ struct list_head handles_list; + + /** req_cnt: tracks the pending commands, based on which we decide to + * go for low/medium/high load configuration of the GPU. + */ + atomic_t req_cnt; }; static inline bool i915_gem_context_is_closed(const struct i915_gem_context *ctx) diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 02adcaf..a38963b 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -2475,6 +2475,8 @@ i915_gem_do_execbuffer(struct drm_device *dev, */ eb.request->batch = eb.batch; + atomic_inc(&eb.ctx->req_cnt); + trace_i915_request_queue(eb.request, eb.batch_flags); err = eb_submit(&eb); err_request: diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 34a0866..d0af37d 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -780,6 +780,9 @@ static void execlists_dequeue(struct intel_engine_cs *engine) last = rq; submit = true; + + if (atomic_read(&rq->gem_context->req_cnt) > 0) + atomic_dec(&rq->gem_context->req_cnt); } rb_erase_cached(&p->node, &execlists->queue); -- 2.7.4 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
