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...00, Peter-Jan Gootzen wrote: >>>>>>> Hi, >>>>>>> >>>>> >>>>> [cc German] >>>>> >>>>>>> For my MSc thesis project in collaboration with IBM >>>>>>> (https://github.com/IBM/dpu-virtio-fs) we are looking to improve the >>>>>>> performance of the virtio-fs driver in high throughput scenarios. We think >>>>>>> the main bottleneck is the fact that the virtio-fs driver does not support >>>>>>> multi-queue (while th...

Add more vDPA callbacks. [s/g]et_vq_state is added in patch 1, including a new control mechanism to read data from the DPU. suspend is added in patch 2. Alvaro Karsz (2): vdpa/snet: support getting and setting VQ state vdpa/snet: support the suspend vDPA callback drivers/vdpa/solidrun/Makefile | 1 + drivers/vdpa/solidrun/snet_ctrl.c | 324 +++++++++++++++++++++++++++++ drivers/vdpa/solidrun/snet_hwmon.c...

Add more vDPA callbacks. [s/g]et_vq_state is added in patch 1, including a new control mechanism to read data from the DPU. suspend is added in patch 2. Alvaro Karsz (2): vdpa/snet: support getting and setting VQ state vdpa/snet: support the suspend vDPA callback drivers/vdpa/solidrun/Makefile | 1 + drivers/vdpa/solidrun/snet_ctrl.c | 324 +++++++++++++++++++++++++++++ drivers/vdpa/solidrun/snet_hwmon.c...

On Tue, Feb 07, 2023 at 11:14:46AM +0100, Peter-Jan Gootzen wrote: > Hi, > > For my MSc thesis project in collaboration with IBM > (https://github.com/IBM/dpu-virtio-fs) we are looking to improve the > performance of the virtio-fs driver in high throughput scenarios. We think > the main bottleneck is the fact that the virtio-fs driver does not support > multi-queue (while the spec does). A big factor in this is that our setup on > the virtio-...

...counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct dpu_hw_intr. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Rob Clark <robdclark at gmail.com> Cc: Abhinav Kumar <quic_abhinavk at quicinc.com> Cc: Dmitry Baryshkov <dmitry.baryshkov at linaro.org> Cc: Sean Paul <sean at poorly.run&gt...

...counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct dpu_hw_intr. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Rob Clark <robdclark at gmail.com> Cc: Abhinav Kumar <quic_abhinavk at quicinc.com> Cc: Dmitry Baryshkov <dmitry.baryshkov at linaro.org> Cc: Sean Paul <sean at poorly.run&gt...

...counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct dpu_hw_intr. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Rob Clark <robdclark at gmail.com> Cc: Abhinav Kumar <quic_abhinavk at quicinc.com> Cc: Dmitry Baryshkov <dmitry.baryshkov at linaro.org> Cc: Sean Paul <sean at poorly.run&gt...

When the Virtio queue is full, a work item is scheduled to execute in 1ms that retries adding the request to the queue. This is a large amount of time on the scale on which a virtio-fs device can operate. When using a DPU this is around 40us baseline without going to a remote server (4k, QD=1). This patch queues requests when the Virtio queue is full, and when a completed request is taken off, immediately fills it back up with queued requests. This reduces the 99.9th percentile latencies in our tests by 60x and sli...

When the Virtio queue is full, a work item is scheduled to execute in 1ms that retries adding the request to the queue. This is a large amount of time on the scale on which a virtio-fs device can operate. When using a DPU this is around 40us baseline without going to a remote server (4k, QD=1). This patch queues requests when the Virtio queue is full, and when a completed request is taken off, immediately fills it back up with queued requests. This reduces the 99.9th percentile latencies in our tests by 60x and sli...

...rote: > > >> When the Virtio queue is full, a work item is scheduled > > >> to execute in 1ms that retries adding the request to the queue. > > >> This is a large amount of time on the scale on which a > > >> virtio-fs device can operate. When using a DPU this is around > > >> 40us baseline without going to a remote server (4k, QD=1). > > >> This patch queues requests when the Virtio queue is full, > > >> and when a completed request is taken off, immediately fills > > >> it back up with queued request...

...Peter-Jan Gootzen wrote: > >> When the Virtio queue is full, a work item is scheduled > >> to execute in 1ms that retries adding the request to the queue. > >> This is a large amount of time on the scale on which a > >> virtio-fs device can operate. When using a DPU this is around > >> 40us baseline without going to a remote server (4k, QD=1). > >> This patch queues requests when the Virtio queue is full, > >> and when a completed request is taken off, immediately fills > >> it back up with queued requests. > >> &gt...

When the Virtio queue is full, a work item is scheduled to execute in 1ms that retries adding the request to the queue. This is a large amount of time on the scale on which a virtio-fs device can operate. When using a DPU this is around 40us baseline without going to a remote server (4k, QD=1). This patch queues requests when the Virtio queue is full, and when a completed request is taken off, immediately fills it back up with queued requests. This reduces the 99.9th percentile latencies in our tests by 60x and sli...

...t;>>>> When the Virtio queue is full, a work item is scheduled >>>>> to execute in 1ms that retries adding the request to the queue. >>>>> This is a large amount of time on the scale on which a >>>>> virtio-fs device can operate. When using a DPU this is around >>>>> 40us baseline without going to a remote server (4k, QD=1). >>>>> This patch queues requests when the Virtio queue is full, >>>>> and when a completed request is taken off, immediately fills >>>>> it back up with queued...

...totally stuck! My questions to this awesome list are: can someone help my with my script? And, if so, can you explain to me how you have achieved your solution? Thanks a lot for reading guys n gals its greatly appreciated. Regards, James. -----BEGIN GEEK CODE BLOCK----- Version: 3.1 GIT/MU/U dpu s: a--> C++>$ U+> L++> B-> P+> E?> W+++>$ N K W++ O M++>$ V- PS+++ PE++ Y+ PGP t 5 X+ R- tv+ b+> DI D+++ G+ e(+++++) h--(++) r++ z++ ------END GEEK CODE BLOCK------

...it obvious I'm new to this? Hehe, I would also love to hear how people would do this in a more efficient manner because obvisouly this is pretty sloppy and as I said I haven't tested it yet so it might not even run?! Thanks, James ;) -----BEGIN GEEK CODE BLOCK----- Version: 3.1 GIT/MU/U dpu s: a--> C++>$ U+> L++> B-> P+> E?> W+++>$ N K W++ O M++>$ V- PS+++ PE++ Y+ PGP t 5 X+ R- tv+ b+> DI D+++ G+ e(+++++) h--(++) r++ z++ ------END GEEK CODE BLOCK------

...s://git.kernel.org/kees/c/a6046ac659d6 [2/9] drm/amdgpu/discovery: Annotate struct ip_hw_instance with __counted_by https://git.kernel.org/kees/c/4df33089b46f [3/9] drm/i915/selftests: Annotate struct perf_series with __counted_by https://git.kernel.org/kees/c/ffd3f823bdf6 [4/9] drm/msm/dpu: Annotate struct dpu_hw_intr with __counted_by https://git.kernel.org/kees/c/2de35a989b76 [5/9] drm/nouveau/pm: Annotate struct nvkm_perfdom with __counted_by https://git.kernel.org/kees/c/188aeb08bfaa [6/9] drm/vc4: Annotate struct vc4_perfmon with __counted_by https://git.kernel...

...s://git.kernel.org/kees/c/a6046ac659d6 [2/9] drm/amdgpu/discovery: Annotate struct ip_hw_instance with __counted_by https://git.kernel.org/kees/c/4df33089b46f [3/9] drm/i915/selftests: Annotate struct perf_series with __counted_by https://git.kernel.org/kees/c/ffd3f823bdf6 [4/9] drm/msm/dpu: Annotate struct dpu_hw_intr with __counted_by https://git.kernel.org/kees/c/2de35a989b76 [5/9] drm/nouveau/pm: Annotate struct nvkm_perfdom with __counted_by https://git.kernel.org/kees/c/188aeb08bfaa [6/9] drm/vc4: Annotate struct vc4_perfmon with __counted_by https://git.kernel...

...s://git.kernel.org/kees/c/a6046ac659d6 [2/9] drm/amdgpu/discovery: Annotate struct ip_hw_instance with __counted_by https://git.kernel.org/kees/c/4df33089b46f [3/9] drm/i915/selftests: Annotate struct perf_series with __counted_by https://git.kernel.org/kees/c/ffd3f823bdf6 [4/9] drm/msm/dpu: Annotate struct dpu_hw_intr with __counted_by https://git.kernel.org/kees/c/2de35a989b76 [5/9] drm/nouveau/pm: Annotate struct nvkm_perfdom with __counted_by https://git.kernel.org/kees/c/188aeb08bfaa [6/9] drm/vc4: Annotate struct vc4_perfmon with __counted_by https://git.kernel...

...Christian. > [2/9] drm/amdgpu/discovery: Annotate struct ip_hw_instance with __counted_by > https://git.kernel.org/kees/c/4df33089b46f > [3/9] drm/i915/selftests: Annotate struct perf_series with __counted_by > https://git.kernel.org/kees/c/ffd3f823bdf6 > [4/9] drm/msm/dpu: Annotate struct dpu_hw_intr with __counted_by > https://git.kernel.org/kees/c/2de35a989b76 > [5/9] drm/nouveau/pm: Annotate struct nvkm_perfdom with __counted_by > https://git.kernel.org/kees/c/188aeb08bfaa > [6/9] drm/vc4: Annotate struct vc4_perfmon with __counted_by &g...

...Christian. > [2/9] drm/amdgpu/discovery: Annotate struct ip_hw_instance with __counted_by > https://git.kernel.org/kees/c/4df33089b46f > [3/9] drm/i915/selftests: Annotate struct perf_series with __counted_by > https://git.kernel.org/kees/c/ffd3f823bdf6 > [4/9] drm/msm/dpu: Annotate struct dpu_hw_intr with __counted_by > https://git.kernel.org/kees/c/2de35a989b76 > [5/9] drm/nouveau/pm: Annotate struct nvkm_perfdom with __counted_by > https://git.kernel.org/kees/c/188aeb08bfaa > [6/9] drm/vc4: Annotate struct vc4_perfmon with __counted_by &g...