Remaining BBox kernel perf optimizations #6896
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datumbox
commented
Nov 3, 2022
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| w_ratio = new_width / old_width | ||
| h_ratio = new_height / old_height | ||
| ratios = torch.tensor([w_ratio, h_ratio, w_ratio, h_ratio], device=bounding_box.device) | ||
| return ( | ||
| bounding_box.reshape(-1, 2, 2).mul(ratios).to(bounding_box.dtype).reshape(bounding_box.shape), | ||
| bounding_box.mul(ratios).to(bounding_box.dtype), |
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Improvement:
[------------ resize cpu torch.float32 ------------]
| old | new
1 threads: -----------------------------------------
(128, 4) | 13 (+- 0) us | 8 (+- 0) us
6 threads: -----------------------------------------
(128, 4) | 13 (+- 0) us | 8 (+- 0) us
Times are in microseconds (us).
[----------- resize cuda torch.float32 ------------]
| old | new
1 threads: -----------------------------------------
(128, 4) | 37 (+- 0) us | 31 (+- 0) us
6 threads: -----------------------------------------
(128, 4) | 37 (+- 0) us | 31 (+- 0) us
Times are in microseconds (us).
[------------- resize cpu torch.uint8 -------------]
| old | new
1 threads: -----------------------------------------
(128, 4) | 19 (+- 0) us | 13 (+- 0) us
6 threads: -----------------------------------------
(128, 4) | 19 (+- 0) us | 13 (+- 0) us
Times are in microseconds (us).
[------------ resize cuda torch.uint8 -------------]
| old | new
1 threads: -----------------------------------------
(128, 4) | 45 (+- 0) us | 39 (+- 0) us
6 threads: -----------------------------------------
(128, 4) | 45 (+- 0) us | 39 (+- 1) us
Times are in microseconds (us).
pmeier
reviewed
Nov 3, 2022
vfdev-5
reviewed
Nov 3, 2022
Contributor
|
Maybe, we can merge this after #6879 |
…astic_bounding_box`.
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|
@vfdev-5 I just pushed a couple of untested opts. Could you check again which you think are safe? I'll do benchmarks after we confirm which ones we want in. |
datumbox
commented
Nov 3, 2022
Contributor
|
I'll cherry pick those for elastic those which makes sense. Thanks for pointers! |
datumbox
commented
Nov 3, 2022
| # Translate bounding boxes | ||
| out_bboxes[:, 0::2] = out_bboxes[:, 0::2] - tr[:, 0] | ||
| out_bboxes[:, 1::2] = out_bboxes[:, 1::2] - tr[:, 1] | ||
| out_bboxes.sub_(tr.repeat((1, 2))) |
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Improvement for both changes:
[-------------------- bbox_rotate cpu -------------------]
| False | True
1 threads: ----------------------------------------------
torch.float32 | 265 (+- 40) us | 225 (+- 2) us
torch.float64 | 261 (+- 1) us | 241 (+- 1) us
torch.int32 | 258 (+- 1) us | 239 (+- 2) us
torch.int64 | 260 (+- 1) us | 239 (+- 1) us
6 threads: ----------------------------------------------
torch.float32 | 466 (+- 10) us | 405 (+- 20) us
torch.float64 | 483 (+- 10) us | 422 (+- 55) us
torch.int32 | 479 (+- 10) us | 420 (+- 10) us
torch.int64 | 482 (+- 18) us | 422 (+- 10) us
Times are in microseconds (us).
[-------------------- bbox_rotate cpu -------------------]
| False | True
1 threads: ----------------------------------------------
torch.float32 | 498 (+- 46) us | 432 (+- 0) us
torch.float64 | 489 (+- 1) us | 446 (+- 0) us
torch.int32 | 503 (+- 0) us | 459 (+- 3) us
torch.int64 | 504 (+- 3) us | 458 (+- 0) us
6 threads: ----------------------------------------------
torch.float32 | 573 (+- 2) us | 530 (+- 0) us
torch.float64 | 600 (+- 20) us | 554 (+- 20) us
torch.int32 | 609 (+- 20) us | 560 (+- 10) us
torch.int64 | 598 (+- 58) us | 563 (+- 10) us
Times are in microseconds (us).
datumbox
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vfdev-5
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Nov 3, 2022
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Nov 4, 2022
Summary: * Bbox resize optimization * Other (untested) optimizations on `_affine_bounding_box_xyxy` and `elastic_bounding_box`. * fix conflict * Reverting changes on elastic * revert one more change * Further improvement Reviewed By: datumbox Differential Revision: D41020550 fbshipit-source-id: dfd1f2d91490b45176f1976bcec1fc99248f8587
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Some of the opts highlighted at #6872
cc @vfdev-5 @bjuncek @pmeier