No need to call _copy_overlapping if src and dst address same memory

[oleksandr-pavlyk]

In [1]: import dpctl.tensor as dpt, dpctl, dpctl.utils

In [2]: n, m = 8 * 540, 8 * 960

In [3]: a = dpt.ones((m, n))

In [4]: b = dpt.zeros((m, n))

In [5]: b_s = dpt.zeros((m, n+2))

In [6]: with dpctl.utils.onetrace_enabled():
   ...:     b_s[:,:-2] += a
      ...:
      Device Timeline (queue: 0x556080b9cea0): zeCommandListAppendMemoryCopy(H2D)[48 bytes]<4.1> [ns] = 16946404661 (append) 16952292497 (submit) 16952613747 (start) 16952623538 (end)
      Device Timeline (queue: 0x556080b9cea0): dpctl::tensor::kernels::add::add_inplace_strided_kernel<float, float, dpctl::tensor::offset_utils::TwoOffsets_StridedIndexer>[SIMD32 {64800; 1; 1} {512; 1; 1}]<5.1> [ns] = 17017855801 (append) 17018342202 (submit) 17019138920 (start) 17030770482 (end)

Earlier, two more copy operations were being performed as well.

Previously:

In [7]: %time b_s[:,:-2] += a
CPU times: user 13.2 ms, sys: 24.7 ms, total: 37.9 ms
Wall time: 53 ms

Now:

In [7]: %time b_s[:,:-2] += a
CPU times: user 5.08 ms, sys: 9.58 ms, total: 14.7 ms
Wall time: 16.7 ms

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[AlexanderKalistratov]

Shouldn't it also fix sqrt with 'out' for pairwise distance?

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1284/index.html

[github-actions]

Array API standard conformance tests for dpctl=0.14.5dev1=py310h7bf5fec_11 ran successfully.
Passed: 448
Failed: 552
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.14.5dev1=py310h7bf5fec_11 ran successfully.
Passed: 448
Failed: 552
Skipped: 119

[github-actions]

Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞

[github-actions]

Array API standard conformance tests for dpctl=0.14.5dev1=py310h7bf5fec_11 ran successfully.
Passed: 448
Failed: 552
Skipped: 119