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Issue 755897 link

Starred by 2 users

Issue metadata

Status: Fixed
Owner:
Closed: Jan 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 3
Type: Bug



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Chrome has a noticeable performance gap comparing with Edge running WebGL Aquarium

Project Member Reported by yang...@intel.com, Aug 16 2017

Issue description

Chrome Version: Any version
OS: Windows 10

What steps will reproduce the problem?
(1) Download WebGLSamples from https://github.com/WebGLSamples/WebGLSamples.github.io, and put it into folder of your web server
(2) Put attached 2 files (aquarium-mod.html and aquarium-mod.js) in folder aquarium/ of WebGLSamples (Sorry that the related files are too large that I couldn't provide a small enough zip file here)
(3) Open <your_server_path>/WebGLSamples/aquarium/aquarium-mod.html, and choose 9000 fishes with desktop Chrome and Edge separately, and observe the FPS results.

What is the expected result?
Chrome and Edge should have no big performance (FPS) gap.

What happens instead?
We see noticeable performance gap between with Edge. Below are results at my side:
CPU: Intel i7-6700K (Skylake)
GPU: NVIDIA GTX 1050 Ti
OS: Windows 10
Browser: Edge 15.15063, Chrome r465495 (M59)
Chrome FPS: 31
Edge FPS: 42

CPU: Intel i7-6700K (Skylake)
GPU: Intel HD Graphics 530 (embedded GPU)
OS: Windows 10
Browser: Edge 15.15063, Chrome r494699 (M62)
Chrome FPS: 23
Edge FPS: 41

Some initial investigations based on r465495:
1. We compare this case between Chrome and Edge. To get comparable results (not too close to 60, and not too low), I change the benchmark a bit and use 9000 fishes instead. This also makes this case a heavy workload with 9000 DrawElements per frame. 
2. This is neither a regression, nor any issue specific to hardware configuration.
3. CPU looks like the actual bottleneck, while GPU is relatively idle. 
4. We can get 60 FPS under Linux, and if we use OpenGL driver directly on Windows (--use-gl=desktop), we can also get 60 FPS. So I think ANGLE has a big impact on its performance, and we may need to tune ANGLE further. We have some initial ideas on this, and want to bring a Chrome-like tracing into ANGLE first to easy the investigation. This is a TODO in our list now.
5. There are 3 validations for this case, in command buffer client, command buffer service and ANGLE. 
The first validation is lightweight, and if we disable it, we can get minor perf gain (< 1FPS). 
Chromium is migrating the second validation to ANGLE. After the migration is done, the second validation can be totally removed. Option “--use-passthrough-cmd-decoder” can be used now to bypass the second validation. If we use this option, FPS can be improved from 31 to 40. 
The third validation in ANGLE comes with some optimization. The optimization is to decide the indexRange so that not all data will be converted to D3D compatible type before passing to D3D driver. However, this optimization is negative for this case as we need all the data to be converted, so there is no need to calculate indexRange again and again. If we disable the validation and optimization, the FPS can be improved from 31 to 37.
If we disable all the validations above, FPS is 44, which is similar to Edge. 
The work of second validation is almost done now. And we're working on some optimization in third validation in ANGLE (https://chromium-review.googlesource.com/c/607413).

I had some rough discussion with kbr@ at  crbug.com/751028 , and he replied as below:
Thanks Yang. Those are great investigations. We definitely want to improve Chrome's performance on high-end workloads that make lots of draw calls. There are other customers requesting this case be improved. As you know, the short-term goal is to switch to the pass-through command buffer on Windows, so the double-validation imposed by the command buffer will be removed soon. We appreciate your help investigating the other performance overhead imposed by index validation and look forward to turning it off on platforms supporting KHR_robust_buffer_access_behavior (including implicitly all D3D based backends).

So I create an issue here to track this case, so that we can continue to profile and improve the performance of Chrome with this case. 

 
aquarium-mod.html
29.7 KB View Download
aquarium-mod.js
50.1 KB View Download

Comment 1 by enne@chromium.org, Aug 17 2017

Status: Assigned (was: Untriaged)
Project Member

Comment 2 by bugdroid1@chromium.org, Aug 23 2017

The following revision refers to this bug:
  https://chromium.googlesource.com/angle/angle/+/59d9da089580afac175ff5f1a932b987c9d194d6

commit 59d9da089580afac175ff5f1a932b987c9d194d6
Author: Qin Jiajia <jiajia.qin@intel.com>
Date: Wed Aug 23 23:51:33 2017

Remove IndexRange retrieving in validation

This change can improve the performance of drawElements which uses
the path without translation.
Paste a set of mean data (repeated 30) for reference on Intel skylake
Win10 desktop.
DrawElementsPerfBenchmark.Run/d3d11:
before                     after
mean: 13644.4666667 -> mean: 13887.8333333
DrawElementsPerfBenchmark.Run/d3d11_index_buffer_changed:
before                     after
mean: 45.8          -> mean: 46.3666666667

BUG= 755897 ,  angleproject:1393 

Change-Id: I11f5db25445346958dfef52b1d23df5483cda32f
Reviewed-on: https://chromium-review.googlesource.com/607413
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

[modify] https://crrev.com/59d9da089580afac175ff5f1a932b987c9d194d6/src/tests/gl_tests/VertexAttributeTest.cpp
[modify] https://crrev.com/59d9da089580afac175ff5f1a932b987c9d194d6/src/libANGLE/renderer/d3d/VertexDataManager.h
[modify] https://crrev.com/59d9da089580afac175ff5f1a932b987c9d194d6/src/libANGLE/renderer/d3d/VertexDataManager.cpp
[modify] https://crrev.com/59d9da089580afac175ff5f1a932b987c9d194d6/src/libANGLE/validationES.cpp

Project Member

Comment 3 by bugdroid1@chromium.org, Aug 24 2017

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/660f70ed3bb7be2aee0986f1729e5bc81c947fa9

commit 660f70ed3bb7be2aee0986f1729e5bc81c947fa9
Author: angle-deps-roller@chromium.org <angle-deps-roller@chromium.org>
Date: Thu Aug 24 01:03:56 2017

Roll skia/third_party/externals/angle2/ abf66fb35..59d9da089 (1 commit)

https://chromium.googlesource.com/angle/angle.git/+log/abf66fb35d23..59d9da089580

$ git log abf66fb35..59d9da089 --date=short --no-merges --format='%ad %ae %s'

Created with:
  roll-dep skia/third_party/externals/angle2
BUG= 755897 


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=skia.primary:Perf-Win10-MSVC-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-ANGLE,Perf-Win10-MSVC-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-ANGLE,Perf-Win10-MSVC-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-ANGLE,Perf-Win10-MSVC-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-ANGLE,Perf-Win10-MSVC-ShuttleC-GPU-GTX960-x86_64-Debug-ANGLE,Perf-Win10-MSVC-ZBOX-GPU-GTX1070-x86_64-Debug-ANGLE,Test-Win10-MSVC-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-ANGLE,Test-Win10-MSVC-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-ANGLE,Test-Win10-MSVC-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-ANGLE,Test-Win10-MSVC-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-ANGLE,Test-Win10-MSVC-ShuttleC-GPU-GTX960-x86_64-Debug-ANGLE,Test-Win10-MSVC-ZBOX-GPU-GTX1070-x86_64-Debug-ANGLE
TBR=jcgregorio@google.com

Change-Id: I00177ab2f41240cd1a8f5418caf1711445f91664
Reviewed-on: https://skia-review.googlesource.com/37960
Reviewed-by: angle-deps-roller . <angle-deps-roller@chromium.org>
Commit-Queue: angle-deps-roller . <angle-deps-roller@chromium.org>

[modify] https://crrev.com/660f70ed3bb7be2aee0986f1729e5bc81c947fa9/DEPS

Project Member

Comment 4 by bugdroid1@chromium.org, Aug 24 2017

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0ea93056410c6a6a59da39ad89d51ba095e457d6

commit 0ea93056410c6a6a59da39ad89d51ba095e457d6
Author: skia-deps-roller@chromium.org <skia-deps-roller@chromium.org>
Date: Thu Aug 24 04:15:16 2017

Roll src/third_party/skia/ ba9741d46..660f70ed3 (1 commit)

https://skia.googlesource.com/skia.git/+log/ba9741d46718..660f70ed3bb7

$ git log ba9741d46..660f70ed3 --date=short --no-merges --format='%ad %ae %s'
2017-08-23 angle-deps-roller Roll skia/third_party/externals/angle2/ abf66fb35..59d9da089 (1 commit)

Created with:
  roll-dep src/third_party/skia
BUG= 755897 


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=jcgregorio@chromium.org

Change-Id: I90159f652cc21198e1454ef663988addbf09dfc5
Reviewed-on: https://chromium-review.googlesource.com/631337
Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496946}
[modify] https://crrev.com/0ea93056410c6a6a59da39ad89d51ba095e457d6/DEPS

Project Member

Comment 5 by bugdroid1@chromium.org, Aug 24 2017

The following revision refers to this bug:
  https://chromium.googlesource.com/angle/angle/+/c1346fba608e11a8f4e7fc0d4c85d5dcf6a0b8df

commit c1346fba608e11a8f4e7fc0d4c85d5dcf6a0b8df
Author: Corentin Wallez <cwallez@chromium.org>
Date: Thu Aug 24 16:11:59 2017

Revert "Remove IndexRange retrieving in validation"

This reverts commit 59d9da089580afac175ff5f1a932b987c9d194d6.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Remove IndexRange retrieving in validation
> 
> This change can improve the performance of drawElements which uses
> the path without translation.
> Paste a set of mean data (repeated 30) for reference on Intel skylake
> Win10 desktop.
> DrawElementsPerfBenchmark.Run/d3d11:
> before                     after
> mean: 13644.4666667 -> mean: 13887.8333333
> DrawElementsPerfBenchmark.Run/d3d11_index_buffer_changed:
> before                     after
> mean: 45.8          -> mean: 46.3666666667
> 
> BUG= 755897 ,  angleproject:1393 
> 
> Change-Id: I11f5db25445346958dfef52b1d23df5483cda32f
> Reviewed-on: https://chromium-review.googlesource.com/607413
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Jamie Madill <jmadill@chromium.org>

TBR=geofflang@chromium.org,jmadill@chromium.org,jiajia.qin@intel.com

Change-Id: I4b00af2c32af36aa978ac2fddcf7514134497cf3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  755897 ,  angleproject:1393 
Reviewed-on: https://chromium-review.googlesource.com/633296
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

[modify] https://crrev.com/c1346fba608e11a8f4e7fc0d4c85d5dcf6a0b8df/src/tests/gl_tests/VertexAttributeTest.cpp
[modify] https://crrev.com/c1346fba608e11a8f4e7fc0d4c85d5dcf6a0b8df/src/libANGLE/renderer/d3d/VertexDataManager.h
[modify] https://crrev.com/c1346fba608e11a8f4e7fc0d4c85d5dcf6a0b8df/src/libANGLE/renderer/d3d/VertexDataManager.cpp
[modify] https://crrev.com/c1346fba608e11a8f4e7fc0d4c85d5dcf6a0b8df/src/libANGLE/validationES.cpp

Project Member

Comment 6 by bugdroid1@chromium.org, Sep 5 2017

The following revision refers to this bug:
  https://chromium.googlesource.com/angle/angle/+/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2

commit 8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2
Author: Jiajia Qin <jiajia.qin@intel.com>
Date: Tue Sep 05 14:37:18 2017

Reland 'Remove IndexRange retrieving in validation'

This change adds GL_KHR_robust_buffer_access_behavior support.
The old change is in https://chromium-review.googlesource.com/c/angle/angle/+/607413

BUG= 755897 ,  angleproject:1393 , angleproject:1463

Change-Id: I04a1132c3ae8d3a766194df61c4ff7bf0b084f03
Reviewed-on: https://chromium-review.googlesource.com/640750
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/tests/gl_tests/VertexAttributeTest.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/util/EGLWindow.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/d3d/VertexDataManager.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/tests/test_utils/ANGLETest.h
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/Context.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/util/EGLWindow.h
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/gl/wgl/DisplayWGL.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/tests/test_utils/ANGLETest.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/Caps.h
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/d3d/d3d9/renderer9_utils.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/gl/glx/DisplayGLX.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/gl/renderergl_utils.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/Caps.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/validationES_unittest.cpp
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/renderer/d3d/VertexDataManager.h
[modify] https://crrev.com/8a7b3a0ced4cb84cba4014c951a49aa94cce3ae2/src/libANGLE/validationES.cpp

Project Member

Comment 7 by bugdroid1@chromium.org, Sep 5 2017

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/4748d81886e642d21f45741b4170f9e1fe4485ac

commit 4748d81886e642d21f45741b4170f9e1fe4485ac
Author: angle-deps-roller@chromium.org <angle-deps-roller@chromium.org>
Date: Tue Sep 05 15:51:17 2017

Roll skia/third_party/externals/angle2/ 72b4e1e5b..8a7b3a0ce (1 commit)

https://chromium.googlesource.com/angle/angle.git/+log/72b4e1e5bbbb..8a7b3a0ced4c

$ git log 72b4e1e5b..8a7b3a0ce --date=short --no-merges --format='%ad %ae %s'
2017-08-25 jiajia.qin Reland 'Remove IndexRange retrieving in validation'

Created with:
  roll-dep skia/third_party/externals/angle2
BUG= 755897 


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=skia.primary:Perf-Win10-MSVC-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-ANGLE,Perf-Win10-MSVC-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-ANGLE,Perf-Win10-MSVC-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-ANGLE,Perf-Win10-MSVC-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-ANGLE,Perf-Win10-MSVC-ShuttleC-GPU-GTX960-x86_64-Debug-ANGLE,Perf-Win10-MSVC-ZBOX-GPU-GTX1070-x86_64-Debug-ANGLE,Test-Win10-MSVC-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-ANGLE,Test-Win10-MSVC-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-ANGLE,Test-Win10-MSVC-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-ANGLE,Test-Win10-MSVC-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-ANGLE,Test-Win10-MSVC-ShuttleC-GPU-GTX960-x86_64-Debug-ANGLE,Test-Win10-MSVC-ZBOX-GPU-GTX1070-x86_64-Debug-ANGLE
TBR=robertphillips@google.com

Change-Id: Id4e4eb0a40f72f4847c8a8ca6613b43a4050a276
Reviewed-on: https://skia-review.googlesource.com/42362
Commit-Queue: angle-deps-roller . <angle-deps-roller@chromium.org>
Reviewed-by: angle-deps-roller . <angle-deps-roller@chromium.org>

[modify] https://crrev.com/4748d81886e642d21f45741b4170f9e1fe4485ac/DEPS

Project Member

Comment 8 by bugdroid1@chromium.org, Sep 5 2017

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/00ce8c5e51ccb1e0620f92ae6611df35b19bbafc

commit 00ce8c5e51ccb1e0620f92ae6611df35b19bbafc
Author: skia-deps-roller@chromium.org <skia-deps-roller@chromium.org>
Date: Tue Sep 05 17:49:27 2017

Roll src/third_party/skia/ 2868b78f4..4748d8188 (3 commits)

https://skia.googlesource.com/skia.git/+log/2868b78f469a..4748d81886e6

$ git log 2868b78f4..4748d8188 --date=short --no-merges --format='%ad %ae %s'
2017-09-05 angle-deps-roller Roll skia/third_party/externals/angle2/ 72b4e1e5b..8a7b3a0ce (1 commit)
2017-09-05 caryclark name parameters for docs
2017-08-31 bungeman Add variation support to SkShaper.

Created with:
  roll-dep src/third_party/skia
BUG= 755897 


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=robertphillips@chromium.org

Change-Id: Iec0be193f7533e601b3361e1219f044e69d7b8b1
Reviewed-on: https://chromium-review.googlesource.com/650513
Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#499672}
[modify] https://crrev.com/00ce8c5e51ccb1e0620f92ae6611df35b19bbafc/DEPS

Comment 9 by yang...@intel.com, Sep 28 2017

Cc: bryan.be...@intel.com
We observed huge performance improvement with recent ANGLE changes, so I further modified the case as attached to be more stressful (20000 fishes). Below are some data at our side:
CPU: Intel i7-7700K (Kaby Lake)
OS: Windows 10
Browser: Edge 15.15063, Latest Chrome Canary 63.0.3225.0

[GPU: Intel HD Graphics 630 (integrated GPU)]
Fishes  Chrome  Chrome (with --use-passthrough-cmd-decoder)  Edge
4K      60      60                                           60
6K      60      60                                           60
9K      52      60                                           47
12K     42      56                                           38
14K     38      50                                           33
16K     35      45                                           30
18K     31      42                                           27


[GPU: NVIDIA GTX 1080 (discrete GPU)]
Fishes  Chrome  Edge
4K      60      60                                           
6K      60      60                                           
9K      60      44                                           
12K     60      34                                           
14K     53      30                                           
16K     47      27                                           
18K     43      24

Observations:
1. With latest Canary Chrome, its performance is already better than Edge, thanks to many improvements in ANGLE.
2. If passthrough command buffer is enabled, performance can be further improved. 
3. For some reason (under investigation), we couldn't enable passthrough command buffer with NVIDIA GTX 1080.                                            



aquarium-mod.html
30.0 KB View Download
aquarium-mod.js
57.8 KB View Download
Thanks for the analysis Yang!

Do you have any more information on why you couldn't enable the pas-through with the 1080? Was there any error information in about:gpu?
>Do you have any more information on why you couldn't enable the pas-through with the 1080?

Hi Jamie, it seems that it's the machine problem. We can't reproduce it when we unplug and plug the NVIDIA graphic card and restart the system. Below is an update for the chrome with use-passthrough-cmd-decoder
Fishes  chrome  Chrome (with --use-passthrough-cmd-decoder)
18k      43      58
20k      39      54
OK, thanks for following up. Those numbers look very good.

Comment 13 by yang...@intel.com, Jan 11 2018

Status: Fixed (was: Assigned)
Chrome (especially ANGLE) has made a lot of improvements and gap with Edge can no longer be seen. All known optimization opportunities in ANGLE for D3D backend have been merged. So I suggest to close this issue.
Hope passthrough command buffer can be default on soon. 

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