Summary:
We need the support for per-team shared variables to support codegen for
lastprivates/reductions. Patch adds this support by using shared memory
if the total size of the reductions/lastprivates is <= 128 bytes,
then pre-allocated buffer in global memory if size is <= 4K bytes,or
uses malloc/free, otherwise.
Reviewers: gtbercea, kkwli0, grokos
Subscribers: guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D51875
llvm-svn: 342737
Summary:
Missed operation of the incrementing iterator when required just to
continue execution.
Reviewers: kkwli0, gtbercea, grokos
Subscribers: guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D51937
llvm-svn: 341964
Some types and callback signatures have changed from TR6 to TR7.
Major changes (only adding signatures and stubs):
(-remove idle callback) done by D48362
-add reduction and dispatch callback
-add get_task_memory and finalize_tool runtime entry points
-ompt_invoker_t becomes ompt_parallel_flag_t
-more types of sync_regions
Patch provided by Simon Convent
Reviewers: hbae, protze.joachim
Differential Revision: https://reviews.llvm.org/D50774
llvm-svn: 341834
Add atomic hint flags to the enum.
The hint parameter type was changed to uint32_t in __kmpc_critical_with_hint()
Patch by Olga Malysheva
Differential Revision: https://reviews.llvm.org/D51235
llvm-svn: 341694
ident flags reserved for atomic hints.
This patch adds omp_sync_hint_t to omp.h and omp_sync_hint_kind to omp_lib.h.
For better maintainability the list of macros for ident flags was replaced with
a enum. The new KMP_IDENT_ATOMIC_HINT_MASK was added to the enum to
support possible future atomic hints.
Also fix omp_lib.h.var to be under 72 chars again after 5.0 OpenMP Memory commit
Patch by Olga Malysheva
Differential Revision: https://reviews.llvm.org/D51233
llvm-svn: 341693
Implemented omp_alloc, omp_free, omp_{set,get}_default_allocator entries,
and OMP_ALLOCATOR environment variable.
Added support for HBW memory on Linux if libmemkind.so library is accessible
(dynamic library only, no support for static libraries).
Only used stable API (hbwmalloc) of the memkind library
though we may consider using experimental API in future.
The ICV def-allocator-var is implemented per implicit task similar to
place-partition-var. In the absence of a requested allocator, the uses the
default allocator.
Predefined allocators (the only ones currently available) are made similar
for C and Fortran, - pointers (long integers) with values 1 to 8.
Patch by Andrey Churbanov
Differential Revision: https://reviews.llvm.org/D51232
llvm-svn: 341687
This is a follow-up to r341371: The new test for PR38704 doesn't
work with Clang 6.0. It uses an UNSUPPORTED: clang-6, but that
hasn't worked because the compiler features weren't known to lit.
llvm-svn: 341448
cuDeviceGetProperties has apparently been deprecated since CUDA 5.0.
Nvidia started using annotations only in CUDA 9.2, so nobody noticed
nor cared before.
The new function returns the same values, tested with a P100.
Differential Revision: https://reviews.llvm.org/D51624
llvm-svn: 341372
* cg and HasCancel in WorkDescr were never read and can be removed.
* This eliminates the last use of priv in ThreadPrivateContext.
* CounterGroup is unused afterwards.
* Remove duplicate external declares in omptarget-nvptx.cu that are
already in the header omptarget-nvptx.h.
Differential Revision: https://reviews.llvm.org/D51622
llvm-svn: 341370
If the runtime is uninitialized the master thread must Enqueue the
state object, and ALL threads must return immediately.
Found post-commit of https://reviews.llvm.org/D51222.
llvm-svn: 341328
Summary:
Implemented simple and lightweight runtime support for SPMD mode-based
constructs. It adds support for L2 sequential parallelism wihtout full
runtime support. Also, patch fixes some use cases for
uninitialized|lightweight runtime.
Reviewers: grokos, kkwli0, Hahnfeld, gtbercea
Subscribers: guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D51222
llvm-svn: 340944
Summary:
Removed the function that used a lock and varargs
Used the same mechanism as for debug messages
Reviewers: ABataev, gtbercea, grokos, Hahnfeld
Reviewed By: gtbercea, Hahnfeld
Subscribers: mikerice, ABataev, RaviNarayanaswamy, guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D51226
llvm-svn: 340767
The __kmp_execute_tasks_template() function reads the task_team and
current_task from the thread structure. There appears to be a pathological
timing where the number of threads in the hot team decreases and so a
thread is put in the pool via __kmp_free_thread(). It could be the case that:
1) A thread reads th_task_team into task_team local variables
and is then interrupted by the OS
2) Master frees the thread and sets current task and task team to NULL
3) The thread reads current_task as NULL
When this happens, current_task is dereferenced and a segfault occurs.
This patch just checks for current_task to not be NULL as well.
Differential Revision: https://reviews.llvm.org/D50651
llvm-svn: 340632
If hot teams are not being used, this code could seg fault without the added
check, and does so when composability is used in conjunction with nesting.
The fix prevents the segfault.
Differential Revision: https://reviews.llvm.org/D50649
llvm-svn: 340629
Exclude nested explicit tasks from timing, only outer level explicit task
counted and its time added to barrier arrive time for the thread.
Differential Revision: https://reviews.llvm.org/D50584
llvm-svn: 340628
Summary:
Right now, only the OMP_TARGET_OFFLOAD=DISABLED was implemented. Added support for the other MANDATORY and DEFAULT values.
Reviewers: gtbercea, ABataev, grokos, caomhin, Hahnfeld
Reviewed By: Hahnfeld
Subscribers: protze.joachim, gtbercea, AlexEichenberger, RaviNarayanaswamy, Hahnfeld, guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D50522
llvm-svn: 340542
The idle callback was removed from the spec as of TR7.
This removes it from the implementation.
Patch provided by Simon Convent
Reviewers: hbae, protze.joachim
Differential Revision: https://reviews.llvm.org/D48362
llvm-svn: 339771
This change fixes an incorrect behavior of the omp_control_tool function when
called from Fortran applications. A tool callback function for this event is
supposed to get NULL for the third argument according to the specification, but
the current implementation just passes a garbage value. A possible fix is to use
the OPTIONAL attribute for the third argument.
Patch by Hansang Bae
Differential Revision: https://reviews.llvm.org/D50565
llvm-svn: 339585
This patch cleans up unused functions, variables, sign compare issues, and
addresses some -Warning flags which are now enabled including -Wcast-qual.
Not all the warning flags in LibompHandleFlags.cmake are enabled, but some
are with this patch.
Some __kmp_gtid_from_* macros in kmp.h are switched to static inline functions
which allows us to remove the awkward definition of KMP_DEBUG_ASSERT() and
KMP_ASSERT() macros which used the comma operator. This had to be done for the
innumerable -Wunused-value warnings related to KMP_DEBUG_ASSERT()
Differential Revision: https://reviews.llvm.org/D49105
llvm-svn: 339393
This patch adds a test using the doacross clauses in OpenMP and removes gcc from
testing kmp_doacross_check.c which is only testing the kmp rather than the
gomp interface.
Differential Revision: https://reviews.llvm.org/D50014
llvm-svn: 338757
This is broken per PR36561 and PR36574, so disable it for now until
somebody interested can take a look. OMPT can still be activated manually
by passing -DLIBOMP_OMPT_SUPPORT=ON during configuration.
Differential Revision: https://reviews.llvm.org/D50086
llvm-svn: 338721
Only supported since GCC 6 and Intel 17.0. However GCC 6.3.0 is
crashing on two of the tests, so disable them as well...
Differential Revision: https://reviews.llvm.org/D50085
llvm-svn: 338720
The taskloop testcase had scheduling effects. Tasks of the taskloop would
sometimes be scheduled before all task were created. The testing is now
split into two phases. First, the task creation on the master is tested,
than the scheduling events of the tasks are tested. Thus, the order of
creation and scheduling events is irrelavant.
Patch by Simon Convent
Reviewed by: protze.joachim, Hahnfeld
Subscribers: openmp-commits
Differential Revision: https://reviews.llvm.org/D50140
llvm-svn: 338580
GCC 4.8.5 defaults to this old C standard. I think we should make the
tests pass a newer -std=c99|c11 but that's too intrusive for now...
Differential Revision: https://reviews.llvm.org/D50084
llvm-svn: 338490
From the bug report, the runtime needs to initialize the nproc variables
(inside middle init) for each root when the task is encountered, otherwise,
a segfault can occur.
Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=36720
Differential Revision: https://reviews.llvm.org/D49996
llvm-svn: 338313
Summary:
When OMPT is not supported the __kmp_omp_task() function is passed the parameters in the wrong order. This is a fix related to patch D47709.
Reviewers: Hahnfeld, sconvent, caomhin, jlpeyton
Reviewed By: Hahnfeld
Subscribers: guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D50001
llvm-svn: 338295
GCC 8 produces false-positives with this:
In file included from <openmp>/src/runtime/src/kmp_os.h:950,
from <openmp>/src/runtime/src/kmp.h:78,
from <openmp>/src/runtime/src/kmp_environment.cpp:54:
<openmp>/src/runtime/src/kmp_environment.cpp: In function ‘char* __kmp_env_get(const char*)’:
<openmp>/src/runtime/src/kmp_safe_c_api.h:52:50: warning: ‘char* strncpy(char*, const char*, size_t)’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
#define KMP_STRNCPY_S(dst, bsz, src, cnt) strncpy(dst, src, cnt)
~~~~~~~^~~~~~~~~~~~~~~
<openmp>/src/runtime/src/kmp_environment.cpp:97:5: note: in expansion of macro ‘KMP_STRNCPY_S’
KMP_STRNCPY_S(result, len, value, len);
^~~~~~~~~~~~~
<openmp>/src/runtime/src/kmp_environment.cpp:92:28: note: length computed here
size_t len = KMP_STRLEN(value) + 1;
This is stupid because result is allocated with KMP_INTERNAL_MALLOC(len),
so the arguments are correct.
Differential Revision: https://reviews.llvm.org/D49904
llvm-svn: 338283
This change introduces GOMP doacross compatibility. There are 12 new interface
functions 6 for long type and 6 for unsigned long long type:
GOMP_doacross_post, GOMP_doacross_wait, GOMP_loop_doacross_[schedule]_start
where schedule can be static, dynamic, guided, or runtime.
These functions just translate the parameters if necessary and send them
to the corresponding kmp function.
E.g., GOMP_doacross_post() -> __kmpc_doacross_post()
For the GOMP_doacross_post function, there is template specialization to
account for when long is a four byte vs an eight byte type. If it is a
four byte type, then a temporary array has to be created to convert the
four byte integers into eight byte integers and then sending that into
__kmpc_doacross_post(). Because GOMP_doacross_wait uses varargs, it
always needs a temporary array and does not need template specialization.
Differential Revision: https://reviews.llvm.org/D49857
llvm-svn: 338280
This change fixes build errors when building a runtime with adaptive lock stats
enabled. Most of the errors were due to the recent changes in the runtime, but
it seems that we have not tried to build this debug runtime on Windows for a
long time.
Patch by Hansang Bae
Differential Revision: https://reviews.llvm.org/D49823
llvm-svn: 338277
1) Remove unnecessary data from list node structure
2) Remove timerPair in favor of pushing/popping explicitTimers.
This way, nested timers will work properly.
3) Fix #pragma omp critical timers
4) Add histogram capability
5) Add KMP_STATS_FILE formatting capability
6) Have time partitioned into serial & parallel by introducing
partitionedTimers::exchange(). This also counts the number of serial regions
in the executable.
7) Fix up the timers around OMP loops so that scheduling overhead and work are
both counted correctly.
8) Fix up the iterations statistics so they count the number of iterations the
thread receives at each loop scheduling event
9) Change timers so there is only one RDTSC read per event change
10) Fix up the outdated comments for the timers
Differential Revision: https://reviews.llvm.org/D49699
llvm-svn: 338276
Fix the order of callbacks related to the taskloop construct.
Add the iteration_count to work callbacks (according to the spec).
Use kmpc_omp_task() instead of kmp_omp_task() to include OMPT callbacks.
Add a testcase.
Patch by Simon Convent
Reviewed by: protze.joachim, hbae
Subscribers: openmp-commits
Differential Revision: https://reviews.llvm.org/D47709
llvm-svn: 338146
The ompt/tasks/task_types.c testcase did not test untied tasks properly. Now,
frame addresses are tested and two scheduling points are added at which the
task can switch to another thread. Due to scheduling effects, the frame address
could be NULL.
This needed a restructure of the way OMPT callbacks are called.
__ompt_task_finish() now as an extra parameter, whether a task is completed.
Its invocation has been moved into __kmp_task_finish(). Thus, the order of the
writes to the frame addresses is not subject to scheduling effects anymore.
Patch by Simon Convent
Reviewed by: protze.joachim, hbae
Subscribers: openmp-commits
Differential Revision: https://reviews.llvm.org/D49181
llvm-svn: 338145
The two more outputs are needed to match the return addresses when using the
Intel Compiler, as it generates more instructions between the fuzzy-printing
of the address and the runtime call.
Patch by Simon Convent
Reviewed By: protze.joachim, hbae
Differential Revision: https://reviews.llvm.org/D49373
llvm-svn: 338144
This function was not enabled by default and not exported when manually
tweaking the build flags. Additionally it was hard to use since there
is no corresponding __kmp_ft_page_free().
The code itself is questionable because the returned memory address
is padded by an extra pointer which stores the unpadded start of the
allocated region (this would need to be freed).
Differential Revision: https://reviews.llvm.org/D49802
llvm-svn: 338052
The initial commit said that the test passes with Intel Compiler,
so change XFAIL to only list clang and gcc.
Differential Revision: https://reviews.llvm.org/D49801
llvm-svn: 338051
Summary:
1. Fixed internal problem in `__kmpc_barrier` function: SPMD mode
synchronization function should be called only in L1 parallel level.
2. Removed some extra code for synchronization inside of the code, used
`__kmpc_barrier` instead.
3. Some code cleanup.
Reviewers: gtbercea, grokos
Subscribers: openmp-commits
Differential Revision: https://reviews.llvm.org/D49564
llvm-svn: 337691
This change fixes possibly invalid access to the internal data structure during
library shutdown. In a heavily oversubscribed situation, the library shutdown
sequence can reach the point where resources are deallocated while there still
exist threads in their final spinning loop. The added loop in
__kmp_internal_end() checks if there are such busy-waiting threads and blocks
the shutdown sequence if that is the case. Two versions of kmp_wait_template()
are now used to minimize performance impact.
Patch by Hansang Bae
Differential Revision: https://reviews.llvm.org/D49452
llvm-svn: 337486
Alexey Bataev