[Mesa-dev] [PATCH] radv: move save/restore operations close to the slow clears

Samuel Pitoiset samuel.pitoiset at gmail.com
Tue Apr 10 14:03:57 UTC 2018



On 04/10/2018 11:20 AM, Bas Nieuwenhuizen wrote:
> Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
> 
> I'm wondering though, doesn't this result in more saves/restores, as
> we now do it for each part of a subpass clear separately?

Yes, possibly. I'm actually not sure myself if it's the right thing to 
do. I will postpone this change for later.

> 
> On Mon, Apr 9, 2018 at 11:10 PM, Samuel Pitoiset
> <samuel.pitoiset at gmail.com> wrote:
>> This removes the emission of unnecessary states, for example
>> when performing a fast depth stencil clear (ie. clearing htile),
>> we don't need to save/restore the graphics pipeline.
>>
>> For GFX9 chips that have the scissor bug workaround, that
>> should also reduce the number of partial flushes.
>>
>> Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
>> ---
>>   src/amd/vulkan/radv_meta_bufimage.c |  8 +++++
>>   src/amd/vulkan/radv_meta_clear.c    | 47 +++++++++--------------------
>>   2 files changed, 22 insertions(+), 33 deletions(-)
>>
>> diff --git a/src/amd/vulkan/radv_meta_bufimage.c b/src/amd/vulkan/radv_meta_bufimage.c
>> index 69e15d3213..5018ce1f2e 100644
>> --- a/src/amd/vulkan/radv_meta_bufimage.c
>> +++ b/src/amd/vulkan/radv_meta_bufimage.c
>> @@ -1242,8 +1242,14 @@ radv_meta_clear_image_cs(struct radv_cmd_buffer *cmd_buffer,
>>   {
>>          VkPipeline pipeline = cmd_buffer->device->meta_state.cleari.pipeline;
>>          struct radv_device *device = cmd_buffer->device;
>> +       struct radv_meta_saved_state saved_state;
>>          struct radv_image_view dst_iview;
>>
>> +       radv_meta_save(&saved_state, cmd_buffer,
>> +                      RADV_META_SAVE_COMPUTE_PIPELINE |
>> +                      RADV_META_SAVE_CONSTANTS |
>> +                      RADV_META_SAVE_DESCRIPTORS);
>> +
>>          create_iview(cmd_buffer, dst, &dst_iview);
>>          cleari_bind_descriptors(cmd_buffer, &dst_iview);
>>
>> @@ -1268,4 +1274,6 @@ radv_meta_clear_image_cs(struct radv_cmd_buffer *cmd_buffer,
>>                                push_constants);
>>
>>          radv_unaligned_dispatch(cmd_buffer, dst->image->info.width, dst->image->info.height, 1);
>> +
>> +       radv_meta_restore(&saved_state, cmd_buffer);
>>   }
>> diff --git a/src/amd/vulkan/radv_meta_clear.c b/src/amd/vulkan/radv_meta_clear.c
>> index 016c1ee296..833e3cebab 100644
>> --- a/src/amd/vulkan/radv_meta_clear.c
>> +++ b/src/amd/vulkan/radv_meta_clear.c
>> @@ -342,6 +342,7 @@ emit_color_clear(struct radv_cmd_buffer *cmd_buffer,
>>          unsigned fs_key = radv_format_meta_fs_key(iview->vk_format);
>>          VkClearColorValue clear_value = clear_att->clearValue.color;
>>          VkCommandBuffer cmd_buffer_h = radv_cmd_buffer_to_handle(cmd_buffer);
>> +       struct radv_meta_saved_state saved_state;
>>          VkPipeline pipeline;
>>
>>          if (fs_key == -1) {
>> @@ -359,6 +360,10 @@ emit_color_clear(struct radv_cmd_buffer *cmd_buffer,
>>          assert(clear_att->aspectMask == VK_IMAGE_ASPECT_COLOR_BIT);
>>          assert(clear_att->colorAttachment < subpass->color_count);
>>
>> +       radv_meta_save(&saved_state, cmd_buffer,
>> +                      RADV_META_SAVE_GRAPHICS_PIPELINE |
>> +                      RADV_META_SAVE_CONSTANTS);
>> +
>>          radv_CmdPushConstants(radv_cmd_buffer_to_handle(cmd_buffer),
>>                                device->meta_state.clear_color_p_layout,
>>                                VK_SHADER_STAGE_FRAGMENT_BIT, 0, 16,
>> @@ -397,6 +402,8 @@ emit_color_clear(struct radv_cmd_buffer *cmd_buffer,
>>          }
>>
>>          radv_cmd_buffer_set_subpass(cmd_buffer, subpass, false);
>> +
>> +       radv_meta_restore(&saved_state, cmd_buffer);
>>   }
>>
>>
>> @@ -613,12 +620,17 @@ emit_depthstencil_clear(struct radv_cmd_buffer *cmd_buffer,
>>          const uint32_t samples = iview->image->info.samples;
>>          const uint32_t samples_log2 = ffs(samples) - 1;
>>          VkCommandBuffer cmd_buffer_h = radv_cmd_buffer_to_handle(cmd_buffer);
>> +       struct radv_meta_saved_state saved_state;
>>
>>          assert(pass_att != VK_ATTACHMENT_UNUSED);
>>
>>          if (!(aspects & VK_IMAGE_ASPECT_DEPTH_BIT))
>>                  clear_value.depth = 1.0f;
>>
>> +       radv_meta_save(&saved_state, cmd_buffer,
>> +                      RADV_META_SAVE_GRAPHICS_PIPELINE |
>> +                      RADV_META_SAVE_CONSTANTS);
>> +
>>          radv_CmdPushConstants(radv_cmd_buffer_to_handle(cmd_buffer),
>>                                device->meta_state.clear_depth_p_layout,
>>                                VK_SHADER_STAGE_VERTEX_BIT, 0, 4,
>> @@ -664,6 +676,8 @@ emit_depthstencil_clear(struct radv_cmd_buffer *cmd_buffer,
>>                  radv_CmdSetStencilReference(cmd_buffer_h, VK_STENCIL_FACE_FRONT_BIT,
>>                                                    prev_reference);
>>          }
>> +
>> +       radv_meta_restore(&saved_state, cmd_buffer);
>>   }
>>
>>   static bool
>> @@ -1165,17 +1179,12 @@ void
>>   radv_cmd_buffer_clear_subpass(struct radv_cmd_buffer *cmd_buffer)
>>   {
>>          struct radv_cmd_state *cmd_state = &cmd_buffer->state;
>> -       struct radv_meta_saved_state saved_state;
>>          enum radv_cmd_flush_bits pre_flush = 0;
>>          enum radv_cmd_flush_bits post_flush = 0;
>>
>>          if (!radv_subpass_needs_clear(cmd_buffer))
>>                  return;
>>
>> -       radv_meta_save(&saved_state, cmd_buffer,
>> -                      RADV_META_SAVE_GRAPHICS_PIPELINE |
>> -                      RADV_META_SAVE_CONSTANTS);
>> -
>>          for (uint32_t i = 0; i < cmd_state->subpass->color_count; ++i) {
>>                  uint32_t a = cmd_state->subpass->color_attachments[i].attachment;
>>
>> @@ -1210,7 +1219,6 @@ radv_cmd_buffer_clear_subpass(struct radv_cmd_buffer *cmd_buffer)
>>                                                &post_flush);
>>          }
>>
>> -       radv_meta_restore(&saved_state, cmd_buffer);
>>          cmd_buffer->state.flush_bits |= post_flush;
>>   }
>>
>> @@ -1405,25 +1413,11 @@ void radv_CmdClearColorImage(
>>   {
>>          RADV_FROM_HANDLE(radv_cmd_buffer, cmd_buffer, commandBuffer);
>>          RADV_FROM_HANDLE(radv_image, image, image_h);
>> -       struct radv_meta_saved_state saved_state;
>>          bool cs = cmd_buffer->queue_family_index == RADV_QUEUE_COMPUTE;
>>
>> -       if (cs) {
>> -               radv_meta_save(&saved_state, cmd_buffer,
>> -                              RADV_META_SAVE_COMPUTE_PIPELINE |
>> -                              RADV_META_SAVE_CONSTANTS |
>> -                              RADV_META_SAVE_DESCRIPTORS);
>> -       } else {
>> -               radv_meta_save(&saved_state, cmd_buffer,
>> -                              RADV_META_SAVE_GRAPHICS_PIPELINE |
>> -                              RADV_META_SAVE_CONSTANTS);
>> -       }
>> -
>>          radv_cmd_clear_image(cmd_buffer, image, imageLayout,
>>                               (const VkClearValue *) pColor,
>>                               rangeCount, pRanges, cs);
>> -
>> -       radv_meta_restore(&saved_state, cmd_buffer);
>>   }
>>
>>   void radv_CmdClearDepthStencilImage(
>> @@ -1436,17 +1430,10 @@ void radv_CmdClearDepthStencilImage(
>>   {
>>          RADV_FROM_HANDLE(radv_cmd_buffer, cmd_buffer, commandBuffer);
>>          RADV_FROM_HANDLE(radv_image, image, image_h);
>> -       struct radv_meta_saved_state saved_state;
>> -
>> -       radv_meta_save(&saved_state, cmd_buffer,
>> -                      RADV_META_SAVE_GRAPHICS_PIPELINE |
>> -                      RADV_META_SAVE_CONSTANTS);
>>
>>          radv_cmd_clear_image(cmd_buffer, image, imageLayout,
>>                               (const VkClearValue *) pDepthStencil,
>>                               rangeCount, pRanges, false);
>> -
>> -       radv_meta_restore(&saved_state, cmd_buffer);
>>   }
>>
>>   void radv_CmdClearAttachments(
>> @@ -1457,17 +1444,12 @@ void radv_CmdClearAttachments(
>>          const VkClearRect*                          pRects)
>>   {
>>          RADV_FROM_HANDLE(radv_cmd_buffer, cmd_buffer, commandBuffer);
>> -       struct radv_meta_saved_state saved_state;
>>          enum radv_cmd_flush_bits pre_flush = 0;
>>          enum radv_cmd_flush_bits post_flush = 0;
>>
>>          if (!cmd_buffer->state.subpass)
>>                  return;
>>
>> -       radv_meta_save(&saved_state, cmd_buffer,
>> -                      RADV_META_SAVE_GRAPHICS_PIPELINE |
>> -                      RADV_META_SAVE_CONSTANTS);
>> -
>>          /* FINISHME: We can do better than this dumb loop. It thrashes too much
>>           * state.
>>           */
>> @@ -1478,6 +1460,5 @@ void radv_CmdClearAttachments(
>>                  }
>>          }
>>
>> -       radv_meta_restore(&saved_state, cmd_buffer);
>>          cmd_buffer->state.flush_bits |= post_flush;
>>   }
>> --
>> 2.17.0
>>
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>> mesa-dev at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/mesa-dev


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