[SYCLomatic] Block Load headers core by abhilash1910 · Pull Request #1640 · oneapi-src/SYCLomatic · GitHub

In Progress PR for Load/Store header functions for Block API (related later to #1305 )
cc @yihanwg @danhoeflinger @mmichel11

A similar comment to above with regards to the stride. In this case, I believe instead of ITEMS_PER_THREAD it should be the subgroup size.

Thinking about the design in more depth, I do not think these APIs should be implemented as free functions. Rather, I think they should be implemented as classes which overload the function call operator or have a member function that invokes the load operation.

My reasoning for this is that certain applications during migration may need to pass a "load" object to a separate function
/ routine in a kernel. If they are implemented as classes, then an object can be passed to the function where it could then be used:

load_striped<...> obj;
my_func(obj);

However, if they are implemented as free functions, then they would need to be passed as function pointers:

auto func_obj = &load_striped<...>;
my_func(func_obj);

which is not supported in the SYCL programming model. To make this work, load_striped would have to be called directly from my_func which I think may be difficult from the migration perspective.

What I think we should do is have two classes work_group_load and sub_group_load and then have some enum type dictating the strategy (ex: striped, blocked, etc). We could then have have specializations of this class to implement each strategy and maybe have some helpers to reduce code duplication.

LGTM

This PR looks to be in good shape for me. However, I think the outstanding comments in oneapi-src/SYCLomatic-test#619 need to be addressed, so we can have confidence in the implementation's correctness.

here are quite many item usage, ITEM/Item/iterms/ITERMS_PER_WORK_ITEM, maybe it should give a better name for "typename Item", it is a little confusing. or please add comments.

thanks will add comments to clarify.

can we rename to nd_item? (what is the diff b/w Item and sycl::nd_item)

Yes it is same thing, but to maintain the same variable name across the file (similar for other apis), Item is used.

Co-authored-by: Wang, Zhiming <zhiming.wang@intel.com>

This PR is now tested with oneapi-src/SYCLomatic-test#619 and all tests are passing.
Tested on application side as well, working as expected.

LGTM,
There are some changes needed in the testing PR still, but with some local changes to those tests and passing runs, I'm confident enough in this PR now to approve.

LGTM

load_helpers

bde928e

abhilash1910 requested a review from a team as a code owner January 18, 2024 12:23

abhilash1910 requested review from AndyCHHuang and tomflinda January 18, 2024 12:23

abhilash1910 marked this pull request as draft January 18, 2024 12:24

add load apis

8717079

abhilash1910 changed the title [SYCLomatic] Block Load/Store headers core [SYCLomatic] Block Load headers core Jan 29, 2024

clang-format

1549642

abhilash1910 marked this pull request as ready for review January 29, 2024 15:35

yihwang-nv suggested changes Jan 30, 2024

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Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h

Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h Outdated

Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h Outdated

abhilash1910 added 5 commits January 30, 2024 09:06

reviews 1

41d994e

fix lit

99df7d9

update warp striped logic

789bd18

rename warp to subgroup

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clang-format

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mmichel11 reviewed Jan 30, 2024

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abhilash1910 added 4 commits January 31, 2024 13:47

review commits 2

fe4c38e

fix lit

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Merge branch 'oneapi-src:SYCLomatic' into block_load_store_headers

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Merge branch 'oneapi-src:SYCLomatic' into block_load_store_headers

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abhilash1910 mentioned this pull request Feb 1, 2024

[SYClomatic-test] Add help function for Block Load header oneapi-src/SYCLomatic-test#619

Merged

clang-format

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mmichel11 reviewed Feb 1, 2024

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danhoeflinger reviewed Feb 1, 2024

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mmichel11 reviewed Feb 1, 2024

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abhilash1910 added 3 commits February 2, 2024 11:32

update review 1

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review commit 2

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fix dtype

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Merge branch 'oneapi-src:SYCLomatic' into block_load_store_headers

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yihwang-nv reviewed Apr 7, 2024

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Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h Outdated

use size_t

fdc2f2f

yihwang-nv approved these changes Apr 29, 2024

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fix issues related to tests 619

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Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h Outdated

abhilash1910 added 2 commits April 30, 2024 18:39

remove ALGORITHM parameter

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format fix

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Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h Outdated

use local_range

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zhimingwang36 reviewed May 6, 2024

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abhilash1910 added 3 commits May 6, 2024 09:02

add comments

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format

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format

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Comment thread clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h Outdated

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abhilash1910 and others added 6 commits May 7, 2024 14:44

Update clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h

bd24713

Co-authored-by: Wang, Zhiming <zhiming.wang@intel.com>

Update clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h

26a3ae2

Co-authored-by: Wang, Zhiming <zhiming.wang@intel.com>

Update clang/runtime/dpct-rt/include/dpct/dpl_extras/dpcpp_extensions.h

6222566

Co-authored-by: Wang, Zhiming <zhiming.wang@intel.com>

Merge branch 'oneapi-src:SYCLomatic' into block_load_store_headers

236c7ba

format

89cf7d3

fix issue in referencing

c4f0ca0

Merge branch 'oneapi-src:SYCLomatic' into block_load_store_headers

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danhoeflinger approved these changes May 8, 2024

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mmichel11 approved these changes May 9, 2024

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Update dpcpp_extensions.h

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zhimingwang36 merged commit 01f2906 into oneapi-src:SYCLomatic May 9, 2024

+                for (int ITEM = 0; ITEM < ITEMS_PER_THREAD; ITEM++) {
+                  new (&items[ITEM])
+                      InputT(block_itr[item.get_sub_group().get_local_range()[0] +
+                                       linear_tid + (ITEM * ITEMS_PER_THREAD)]);

+              // InputT: typename parameter controlled at runtime from input sequence.
+              // InputIteratorT: typename parameter for iterator pointer controlled at
+              // runtime.
+              // Item : typename parameter resembling sycl::nd_item<3> .

+              }
+              template <size_t ITEMS_PER_WORK_ITEM, load_algorithm ALGORITHM, typename InputT,
+                        typename InputIteratorT, typename Item>

[SYCLomatic] Block Load headers core by abhilash1910 · Pull Request #1640 · oneapi-src/SYCLomatic · GitHub

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[SYCLomatic] Block Load headers core - #1640

[SYCLomatic] Block Load headers core#1640zhimingwang36 merged 76 commits intooneapi-src:SYCLomaticoneapi-src/SYCLomatic:SYCLomaticfrom abhilash1910:block_load_store_headersabhilash1910/SYCLomatic:block_load_store_headersCopy head branch name to clipboard

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[SYCLomatic] Block Load headers core#1640
zhimingwang36 merged 76 commits into
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