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Differential D141232

[OpenMP] Modernize the kernel launching interface and APIs
ClosedPublic

Authored by jdoerfert on Jan 8 2023, 1:38 PM.

Details

Reviewers
ABataev
jhuber6
tianshilei1992
dreachem
RaviNarayanaswamy
ronlieb
kevinsala
Commits
rG16a385ba21a9: [OpenMP] Modernize the kernel launching interface and APIs
Summary

We already created a versioned __tgt_kernel_arguments struct but it
was only briefly used and its content was passed in isolation anyway.
This makes it hard to add more information in the future. With this
patch we fully embrace the struct as means to pass information from the
compiler to the plugin as part of a kernel launch.

The patch also extends and renames the struct, bumping the version
number to 2. Version 1 entries are auto-upgraded. This is in preparation
for "bare" kernel launches, per kernel dynamic shared memory, CUDA/HIP
support, etc.

The __tgt_target_kernel_nowait interface was deprecated. Once we
actually implement something like that, we can add an appropriate API.

Note: Only plugins with the launch_kernel interface are now supported.

That means that an old clang won't be able to use an old runtime.
An old clang can still use the new runtime since the libomptarget
interface did not change.

Note: Context has been reduced to match the 8MB upload limit of phab.

Diff Detail

Event Timeline

jdoerfert created this revision.Jan 8 2023, 1:38 PM
Herald added a project: Restricted Project. · View Herald TranscriptJan 8 2023, 1:38 PM
Herald added subscribers: kosarev, mattd, asavonic and 6 others. · View Herald Transcript
jdoerfert requested review of this revision.Jan 8 2023, 1:38 PM
Herald added a project: Restricted Project. · View Herald TranscriptJan 8 2023, 1:38 PM
Herald added subscribers: llvm-commits, sstefan1. · View Herald Transcript
Harbormaster completed remote builds in B206384: Diff 487223.Jan 8 2023, 1:38 PM
jdoerfert added a child revision: D141233: [OpenMP][GPU] Introduce the `ompx_dyn_cgroup_mem(<N>)` clause.Jan 8 2023, 1:39 PM
jdoerfert added a reviewer: kevinsala.Jan 8 2023, 1:43 PM
dreachem added a comment.Jan 11 2023, 10:03 AM

This looks OK for us (HPE). CCE does use the entry point that this patch will deprecate, and we'll probably keep it around in our runtime, so as long as it is not repurposed and changed in the future than it should not affect us. We will plan to use the new interface for target nowait once it is in.

jhuber6 accepted this revision.Jan 15 2023, 12:14 PM

LG, this really simplifies things. I'm assuming this passes all our tests.

This revision is now accepted and ready to land.Jan 15 2023, 12:14 PM
jdoerfert added inline comments.Jan 15 2023, 12:15 PM
openmp/libomptarget/include/omptarget.h
134

While I'm here, I will also add an uint64_t field for the "stream" (or similar) passed to cuda/hip kernels.

jdoerfert updated this revision to Diff 490669.Jan 19 2023, 2:50 PM

rebase, fix issues.

Harbormaster completed remote builds in B208864: Diff 490669.Jan 19 2023, 5:22 PM
This revision was landed with ongoing or failed builds.Jan 21 2023, 11:31 AM
Closed by commit rG16a385ba21a9: [OpenMP] Modernize the kernel launching interface and APIs (authored by jdoerfert). · Explain Why
This revision was automatically updated to reflect the committed changes.
jdoerfert added a commit: rG16a385ba21a9: [OpenMP] Modernize the kernel launching interface and APIs.
Herald added projects: Restricted Project, Restricted Project. · View Herald TranscriptJan 21 2023, 11:31 AM
Herald added subscribers: openmp-commits, cfe-commits. · View Herald Transcript
ronlieb added a comment.Jan 21 2023, 12:59 PM

hi, breaks our amdgpu buildbot, please fix ASAP , or revert and fix. thx
3 patches: https://lab.llvm.org/buildbot/#/builders/193/builds/25299

i reverted locally and verified this patch as the cause.

jdoerfert added a comment.Jan 21 2023, 1:46 PM
In D141232#4071310, @ronlieb wrote:

hi, breaks our amdgpu buildbot, please fix ASAP , or revert and fix. thx
3 patches: https://lab.llvm.org/buildbot/#/builders/193/builds/25299

i reverted locally and verified this patch as the cause.

Fixed by 3820d0eaaf4ecb557cbb260e34bf5a9eeb51e0e7.

Large Diff

This large diff affects 154 files. Files without inline comments have been collapsed. Expand All Files

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Diff 491085

clang/lib/CodeGen/CGOpenMPRuntime.cpp

clang/test/OpenMP/declare_mapper_codegen.cpp

clang/test/OpenMP/distribute_codegen.cpp

clang/test/OpenMP/distribute_firstprivate_codegen.cpp

clang/test/OpenMP/distribute_lastprivate_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_firstprivate_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_if_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_lastprivate_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_num_threads_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_private_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_proc_bind_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_firstprivate_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_if_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_lastprivate_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_num_threads_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_private_codegen.cpp

clang/test/OpenMP/distribute_parallel_for_simd_proc_bind_codegen.cpp

clang/test/OpenMP/distribute_private_codegen.cpp

clang/test/OpenMP/distribute_simd_codegen.cpp

clang/test/OpenMP/distribute_simd_firstprivate_codegen.cpp

clang/test/OpenMP/distribute_simd_lastprivate_codegen.cpp

clang/test/OpenMP/distribute_simd_private_codegen.cpp

clang/test/OpenMP/distribute_simd_reduction_codegen.cpp

clang/test/OpenMP/interop_irbuilder.cpp

clang/test/OpenMP/nvptx_lambda_capturing.cpp

clang/test/OpenMP/reduction_implicit_map.cpp

clang/test/OpenMP/target_codegen.cpp

clang/test/OpenMP/target_codegen_global_capture.cpp

clang/test/OpenMP/target_data_map_codegen_hold.cpp

clang/test/OpenMP/target_depend_codegen.cpp

clang/test/OpenMP/target_has_device_addr_codegen.cpp

clang/test/OpenMP/target_has_device_addr_codegen_01.cpp

clang/test/OpenMP/target_map_codegen_03.cpp

clang/test/OpenMP/target_map_codegen_hold.cpp

clang/test/OpenMP/target_map_member_expr_codegen.cpp

clang/test/OpenMP/target_offload_mandatory_codegen.cpp

clang/test/OpenMP/target_parallel_codegen.cpp

clang/test/OpenMP/target_parallel_depend_codegen.cpp

clang/test/OpenMP/target_parallel_for_codegen.cpp

clang/test/OpenMP/target_parallel_for_depend_codegen.cpp

clang/test/OpenMP/target_parallel_for_simd_codegen.cpp

clang/test/OpenMP/target_parallel_for_simd_depend_codegen.cpp

clang/test/OpenMP/target_parallel_if_codegen.cpp

clang/test/OpenMP/target_parallel_num_threads_codegen.cpp

clang/test/OpenMP/target_simd_codegen.cpp

clang/test/OpenMP/target_simd_depend_codegen.cpp

clang/test/OpenMP/target_teams_codegen.cpp

clang/test/OpenMP/target_teams_depend_codegen.cpp

clang/test/OpenMP/target_teams_distribute_codegen.cpp

clang/test/OpenMP/target_teams_distribute_collapse_codegen.cpp

clang/test/OpenMP/target_teams_distribute_depend_codegen.cpp

clang/test/OpenMP/target_teams_distribute_dist_schedule_codegen.cpp

clang/test/OpenMP/target_teams_distribute_firstprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_lastprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_collapse_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_depend_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_dist_schedule_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_firstprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_if_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_lastprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_order_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_private_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_proc_bind_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_reduction_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_schedule_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_collapse_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_depend_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_dist_schedule_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_firstprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_if_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_lastprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_private_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_proc_bind_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_reduction_codegen.cpp

clang/test/OpenMP/target_teams_distribute_parallel_for_simd_schedule_codegen.cpp

clang/test/OpenMP/target_teams_distribute_private_codegen.cpp

clang/test/OpenMP/target_teams_distribute_reduction_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_collapse_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_depend_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_dist_schedule_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_firstprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_lastprivate_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_private_codegen.cpp

clang/test/OpenMP/target_teams_distribute_simd_reduction_codegen.cpp

clang/test/OpenMP/target_teams_map_codegen.cpp

clang/test/OpenMP/target_teams_num_teams_codegen.cpp

clang/test/OpenMP/target_teams_thread_limit_codegen.cpp

clang/test/OpenMP/teams_codegen.cpp

clang/test/OpenMP/teams_distribute_codegen.cpp

clang/test/OpenMP/teams_distribute_collapse_codegen.cpp

clang/test/OpenMP/teams_distribute_dist_schedule_codegen.cpp

clang/test/OpenMP/teams_distribute_firstprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_lastprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_collapse_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_copyin_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_dist_schedule_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_firstprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_if_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_lastprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_num_threads_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_private_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_proc_bind_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_reduction_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_schedule_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_collapse_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_dist_schedule_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_firstprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_if_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_lastprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_num_threads_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_private_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_proc_bind_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_reduction_codegen.cpp

clang/test/OpenMP/teams_distribute_parallel_for_simd_schedule_codegen.cpp

clang/test/OpenMP/teams_distribute_private_codegen.cpp

clang/test/OpenMP/teams_distribute_reduction_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_collapse_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_dist_schedule_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_firstprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_lastprivate_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_private_codegen.cpp

clang/test/OpenMP/teams_distribute_simd_reduction_codegen.cpp

clang/test/OpenMP/teams_firstprivate_codegen.cpp

clang/test/OpenMP/teams_private_codegen.cpp

llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h

llvm/include/llvm/Frontend/OpenMP/OMPKinds.def

llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp

openmp/libomptarget/include/device.h

openmp/libomptarget/include/omptarget.h

//===-------- omptarget.h - Target independent OpenMP target RTL -- C++ -*-===// //===-------- omptarget.h - Target independent OpenMP target RTL -- C++ -*-===//
// //
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information. // See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //
// Interface to be used by Clang during the codegen of a // Interface to be used by Clang during the codegen of a
// target region. // target region.
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
#ifndef _OMPTARGET_H_ #ifndef _OMPTARGET_H_
#define _OMPTARGET_H_ #define _OMPTARGET_H_
#include <cstdint>
#include <deque> #include <deque>
#include <functional> #include <functional>
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
#include <type_traits> #include <type_traits>
#include <SourceInfo.h> #include <SourceInfo.h>
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enum TargetAllocTy : int32_t { enum TargetAllocTy : int32_t {
TARGET_ALLOC_DEVICE = 0, TARGET_ALLOC_DEVICE = 0,
TARGET_ALLOC_HOST, TARGET_ALLOC_HOST,
TARGET_ALLOC_SHARED, TARGET_ALLOC_SHARED,
TARGET_ALLOC_DEFAULT TARGET_ALLOC_DEFAULT
}; };
/// This struct contains all of the arguments to a target kernel region launch. /// This struct contains all of the arguments to a target kernel region launch.
struct __tgt_kernel_arguments { struct KernelArgsTy {
int32_t Version; // Version of this struct for ABI compatibility. uint32_t Version; // Version of this struct for ABI compatibility.
int32_t NumArgs; // Number of arguments in each input pointer. uint32_t NumArgs; // Number of arguments in each input pointer.
void **ArgBasePtrs; // Base pointer of each argument (e.g. a struct). void **ArgBasePtrs; // Base pointer of each argument (e.g. a struct).
void **ArgPtrs; // Pointer to the argument data. void **ArgPtrs; // Pointer to the argument data.
int64_t *ArgSizes; // Size of the argument data in bytes. int64_t *ArgSizes; // Size of the argument data in bytes.
int64_t *ArgTypes; // Type of the data (e.g. to / from). int64_t *ArgTypes; // Type of the data (e.g. to / from).
void **ArgNames; // Name of the data for debugging, possibly null. void **ArgNames; // Name of the data for debugging, possibly null.
void **ArgMappers; // User-defined mappers, possibly null. void **ArgMappers; // User-defined mappers, possibly null.
int64_t Tripcount; // Tripcount for the teams / distribute loop, 0 otherwise. uint64_t Tripcount; // Tripcount for the teams / distribute loop, 0 otherwise.
struct {
uint64_t NoWait : 1; // Was this kernel spawned with a `nowait` clause.
uint64_t Unused : 63;
} Flags;
uint32_t NumTeams[3]; // The number of teams (for x,y,z dimension).
uint32_t ThreadLimit[3]; // The number of threads (for x,y,z dimension).
uint32_t DynCGroupMem; // Amount of dynamic cgroup memory requested.
jdoerfertAuthorUnsubmitted
Done
ReplyInline Actions

While I'm here, I will also add an uint64_t field for the "stream" (or similar) passed to cuda/hip kernels.

jdoerfert: While I'm here, I will also add an `uint64_t` field for the "stream" (or similar) passed to…
}; };
static_assert(sizeof(__tgt_kernel_arguments) == 64 || static_assert(sizeof(KernelArgsTy().Flags) == sizeof(uint64_t),
sizeof(__tgt_kernel_arguments) == 40,
"Invalid struct size"); "Invalid struct size");
static_assert(sizeof(KernelArgsTy) == (8 * sizeof(int32_t) + 3 * sizeof(int64_t) + 4 * sizeof(void**) + 2 * sizeof(int64_t*)),
"Invalid struct size");
constexpr KernelArgsTy CTorDTorKernelArgs = {1, 0, nullptr, nullptr,
nullptr, nullptr, nullptr, nullptr,
0, {0,0}, {1, 0, 0}, {1, 0, 0}, 0};
/// This struct is a record of an entry point or global. For a function /// This struct is a record of an entry point or global. For a function
/// entry point the size is expected to be zero /// entry point the size is expected to be zero
struct __tgt_offload_entry { struct __tgt_offload_entry {
void *addr; // Pointer to the offload entry info (function or global) void *addr; // Pointer to the offload entry info (function or global)
char *name; // Name of the function or global char *name; // Name of the function or global
size_t size; // Size of the entry info (0 if it is a function) size_t size; // Size of the entry info (0 if it is a function)
int32_t flags; // Flags associated with the entry, e.g. 'link'. int32_t flags; // Flags associated with the entry, e.g. 'link'.
▲ Show 20 Lines • Show All 255 Lines • ▼ Show 20 Lines
// Performs the same actions as data_begin in case ArgNum is non-zero // Performs the same actions as data_begin in case ArgNum is non-zero
// and initiates run of offloaded region on target platform; if ArgNum // and initiates run of offloaded region on target platform; if ArgNum
// is non-zero after the region execution is done it also performs the // is non-zero after the region execution is done it also performs the
// same action as data_end above. The following types are used; this // same action as data_end above. The following types are used; this
// function returns 0 if it was able to transfer the execution to a // function returns 0 if it was able to transfer the execution to a
// target and an int different from zero otherwise. // target and an int different from zero otherwise.
int __tgt_target_kernel(ident_t *Loc, int64_t DeviceId, int32_t NumTeams, int __tgt_target_kernel(ident_t *Loc, int64_t DeviceId, int32_t NumTeams,
int32_t ThreadLimit, void *HostPtr, int32_t ThreadLimit, void *HostPtr, KernelArgsTy *Args);
__tgt_kernel_arguments *Args);
int __tgt_target_kernel_nowait(ident_t *Loc, int64_t DeviceId, int32_t NumTeams,
int32_t ThreadLimit, void *HostPtr,
__tgt_kernel_arguments *Args, int32_t DepNum,
void *DepList, int32_t NoAliasDepNum,
void *NoAliasDepList);
// Non-blocking synchronization for target nowait regions. This function // Non-blocking synchronization for target nowait regions. This function
// acquires the asynchronous context from task data of the current task being // acquires the asynchronous context from task data of the current task being
// executed and tries to query for the completion of its operations. If the // executed and tries to query for the completion of its operations. If the
// operations are still pending, the function returns immediately. If the // operations are still pending, the function returns immediately. If the
// operations are completed, all the post-processing procedures stored in the // operations are completed, all the post-processing procedures stored in the
// asynchronous context are executed and the context is removed from the task // asynchronous context are executed and the context is removed from the task
// data. // data.
Show All 24 Lines

openmp/libomptarget/include/rtl.h

openmp/libomptarget/plugins-nextgen/amdgpu/src/rtl.cpp

openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.h

openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp

openmp/libomptarget/plugins-nextgen/cuda/src/rtl.cpp

openmp/libomptarget/plugins-nextgen/generic-elf-64bit/src/rtl.cpp

openmp/libomptarget/plugins/amdgpu/src/rtl.cpp

openmp/libomptarget/plugins/generic-elf-64bit/src/rtl.cpp

openmp/libomptarget/plugins/remote/src/Client.h

openmp/libomptarget/plugins/remote/src/rtl.cpp

openmp/libomptarget/plugins/ve/src/rtl.cpp

openmp/libomptarget/src/LegacyAPI.cpp

openmp/libomptarget/src/device.cpp

openmp/libomptarget/src/interface.cpp

openmp/libomptarget/src/omptarget.cpp

openmp/libomptarget/src/private.h

openmp/libomptarget/src/rtl.cpp