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[212.216.221.196]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a93c297b7d6sm38862166b.162.2024.09.26.14.17.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2024 14:17:08 -0700 (PDT) From: Antonino Maniscalco Date: Thu, 26 Sep 2024 23:16:50 +0200 Subject: [PATCH v6 08/11] drm/msm/a6xx: Add traces for preemption Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240926-preemption-a750-t-v6-8-7b6e1ef3648f@gmail.com> References: <20240926-preemption-a750-t-v6-0-7b6e1ef3648f@gmail.com> In-Reply-To: <20240926-preemption-a750-t-v6-0-7b6e1ef3648f@gmail.com> To: Rob Clark , Sean Paul , Konrad Dybcio , Abhinav Kumar , Dmitry Baryshkov , Marijn Suijten , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Jonathan Corbet Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Antonino Maniscalco , Akhil P Oommen , Neil Armstrong X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1727385413; l=2841; i=antomani103@gmail.com; s=20240815; h=from:subject:message-id; bh=e8NI1sPsjgdaczPyb6uHIaB/U/4w86fcwHEFY+OeNMM=; b=L/zsrWgyQ1WUnaU3njAXmCrXvxP69203oSucaP7nGVBVx0l5AGhEKUdnFZCCSDBoqOFudrkrd jhgMiTIYQf0AvgqygoRCcg50ZBqlBdswFhB5qkGr62Xg9Dsw7Xl1ne+ X-Developer-Key: i=antomani103@gmail.com; a=ed25519; pk=0zicFb38tVla+iHRo4kWpOMsmtUrpGBEa7LkFF81lyY= Add trace points corresponding to preemption being triggered and being completed for latency measurement purposes. Reviewed-by: Akhil P Oommen Tested-by: Neil Armstrong # on SM8650-QRD Tested-by: Neil Armstrong # on SM8550-QRD Tested-by: Neil Armstrong # on SM8450-HDK Signed-off-by: Antonino Maniscalco --- drivers/gpu/drm/msm/adreno/a6xx_preempt.c | 6 ++++++ drivers/gpu/drm/msm/msm_gpu_trace.h | 28 ++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_preempt.c b/drivers/gpu/drm/ms= m/adreno/a6xx_preempt.c index cf75f612edc15374f3d8238e3dc0297532569607..ae471a572a7100d8a3b86a7eaa0= dcbea7a728fb1 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_preempt.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_preempt.c @@ -7,6 +7,7 @@ #include "a6xx_gpu.h" #include "a6xx_gmu.xml.h" #include "msm_mmu.h" +#include "msm_gpu_trace.h" =20 /* * Try to transition the preemption state from old to new. Return @@ -174,6 +175,8 @@ void a6xx_preempt_irq(struct msm_gpu *gpu) =20 set_preempt_state(a6xx_gpu, PREEMPT_NONE); =20 + trace_msm_gpu_preemption_irq(a6xx_gpu->cur_ring->id); + /* * Retrigger preemption to avoid a deadlock that might occur when preempt= ion * is skipped due to it being already in flight when requested. @@ -295,6 +298,9 @@ void a6xx_preempt_trigger(struct msm_gpu *gpu) */ ring->restore_wptr =3D false; =20 + trace_msm_gpu_preemption_trigger(a6xx_gpu->cur_ring->id, + ring ? ring->id : -1); + spin_unlock_irqrestore(&ring->preempt_lock, flags); =20 gpu_write64(gpu, diff --git a/drivers/gpu/drm/msm/msm_gpu_trace.h b/drivers/gpu/drm/msm/msm_= gpu_trace.h index ac40d857bc4578377b03b4cedd138c87144997e4..7f863282db0d7812c8fd53b3f1f= c0cd5635028ba 100644 --- a/drivers/gpu/drm/msm/msm_gpu_trace.h +++ b/drivers/gpu/drm/msm/msm_gpu_trace.h @@ -177,6 +177,34 @@ TRACE_EVENT(msm_gpu_resume, TP_printk("%u", __entry->dummy) ); =20 +TRACE_EVENT(msm_gpu_preemption_trigger, + TP_PROTO(int ring_id_from, int ring_id_to), + TP_ARGS(ring_id_from, ring_id_to), + TP_STRUCT__entry( + __field(int, ring_id_from) + __field(int, ring_id_to) + ), + TP_fast_assign( + __entry->ring_id_from =3D ring_id_from; + __entry->ring_id_to =3D ring_id_to; + ), + TP_printk("preempting %u -> %u", + __entry->ring_id_from, + __entry->ring_id_to) +); + +TRACE_EVENT(msm_gpu_preemption_irq, + TP_PROTO(u32 ring_id), + TP_ARGS(ring_id), + TP_STRUCT__entry( + __field(u32, ring_id) + ), + TP_fast_assign( + __entry->ring_id =3D ring_id; + ), + TP_printk("preempted to %u", __entry->ring_id) +); + #endif =20 #undef TRACE_INCLUDE_PATH --=20 2.46.1