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* [OpenMP] NFC: Fix trivial typos in commentsKazuaki Ishizaki2020-01-071-3/+3
| | | | | | | | | | | | Reviewers: jdoerfert, Jim Reviewed By: Jim Subscribers: Jim, mgorny, guansong, jfb, openmp-commits Tags: #openmp Differential Revision: https://reviews.llvm.org/D72285
* [openmp] Fixed nonmonotonic schedule when #threads > #chunks in a loop.AndreyChurbanov2019-11-271-7/+8
| | | | Differential Revision: https://reviews.llvm.org/D70713
* [OpenMP] Remove OMP spec versioningJonathan Peyton2019-07-121-26/+8
| | | | | | | | | | Remove all older OMP spec versioning from the runtime and build system. Patch by Terry Wilmarth Differential Revision: https://reviews.llvm.org/D64534 llvm-svn: 365963
* [OpenMP] Add OpenMP 5.0 nonmonotonic codeJonathan Peyton2019-04-301-13/+50
| | | | | | | | | | | | This patch adds: * New omp_sched_monotonic flag to omp_sched_t which is handled within the runtime * Parsing of monotonic/nonmonotonic in OMP_SCHEDULE * Tests for the monotonic flag and envirable parsing * Logic to force monotonic when hierarchical scheduling is used Differential Revision: https://reviews.llvm.org/D60979 llvm-svn: 359601
* [OpenMP][Stats] Fix stats gathering for distribute and team clauseJonathan Peyton2019-04-031-0/+6
| | | | | | | | | | | The distribute clause needs an explicit push of a timer. The teams clause needs a timer added and also, similarly to parallel, exchanged with the serial timer when encountered so that serial regions are counted properly. Differential Revision: https://reviews.llvm.org/D59801 llvm-svn: 357621
* [OpenMP] Make use of sched_yield optional in runtimeJonathan Peyton2019-02-281-23/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch cleans up the yielding code and makes it optional. An environment variable, KMP_USE_YIELD, was added. Yielding is still on by default (KMP_USE_YIELD=1), but can be turned off completely (KMP_USE_YIELD=0), or turned on only when oversubscription is detected (KMP_USE_YIELD=2). Note that oversubscription cannot always be detected by the runtime (for example, when the runtime is initialized and the process forks, oversubscription cannot be detected currently over multiple instances of the runtime). Because yielding can be controlled by user now, the library mode settings (from KMP_LIBRARY) for throughput and turnaround have been adjusted by altering blocktime, unless that was also explicitly set. In the original code, there were a number of places where a double yield might have been done under oversubscription. This version checks oversubscription and if that's not going to yield, then it does the spin check. Patch by Terry Wilmarth Differential Revision: https://reviews.llvm.org/D58148 llvm-svn: 355120
* [OMPT] Make sure that OMPT is enabled when accessing internals of the runtimeJoachim Protze2019-02-041-0/+1
| | | | | | | | | | | | | | | | | The three switch fallthrough generate a warning with -Wimplicit-fallthrough. Two are documented as fallthrough, one is not, but I think the intention is to also fallthrough in kmp_tasking.cpp. Not sure whether kmp.h is the best place to define the macro. Reviewers: jlpeyton, AndreyChurbanov, Hahnfeld Reviewed By: jlpeyton Tags: #openmp Differential Revision: https://reviews.llvm.org/D56397 llvm-svn: 353052
* Update more file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-191-4/+3
| | | | | | | | | | | | | | | | | | to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
* [OpenMP] Add omp_pause_resource* APIJonathan Peyton2019-01-161-0/+4
| | | | | | | | | | | | Add omp_pause_resource and omp_pause_resource_all API and enum, plus stub for internal implementation. Implemented callable helper function to do local pause, and added basic functionality for hard and soft pause. Patch by Terry Wilmarth Differential Revision: https://reviews.llvm.org/D55078 llvm-svn: 351372
* Support clang compiling under windows-gnu and windows-msvcAndrey Churbanov2018-12-101-6/+6
| | | | | | | | Patch by Peiyuan Song <squallatf@gmail.com> Differential Revision: https://reviews.llvm.org/D53422 llvm-svn: 348756
* [OpenMP][OMPT] A few improvementsJonathan Peyton2018-09-261-7/+0
| | | | | | | | | | | | | | This change includes miscellaneous improvements as follows: 1) Added ompt_get_proc_id() implementation for Windows 2) Added parser and print tool for omp-tool-var, just in case it needs to be printed (OMP_DISPLAY_ENV) 3) omp_control_tool is exported on Windows Patch by Hansang Bae Differential Revision: https://reviews.llvm.org/D50538 llvm-svn: 343137
* [OpenMP] Cleanup codeJonathan Peyton2018-08-091-6/+4
| | | | | | | | | | | | | | | | 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
* [OpenMP][Stats] Cleanup stats gathering codeJonathan Peyton2018-07-301-17/+51
| | | | | | | | | | | | | | | | | | | | | | 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
* [OpenMP] Introduce hierarchical schedulingJonathan Peyton2018-07-091-3/+104
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces the logic implementing hierarchical scheduling. First and foremost, hierarchical scheduling is off by default To enable, use -DLIBOMP_USE_HIER_SCHED=On during CMake's configure stage. This work is based off if the IWOMP paper: "Workstealing and Nested Parallelism in SMP Systems" Hierarchical scheduling is the layering of OpenMP schedules for different layers of the memory hierarchy. One can have multiple layers between the threads and the global iterations space. The threads will go up the hierarchy to grab iterations, using possibly a different schedule & chunk for each layer. [ Global iteration space (0-999) ] (use static) [ L1 | L1 | L1 | L1 ] (use dynamic,1) [ T0 T1 | T2 T3 | T4 T5 | T6 T7 ] In the example shown above, there are 8 threads and 4 L1 caches begin targeted. If the topology indicates that there are two threads per core, then two consecutive threads will share the data of one L1 cache unit. This example would have the iteration space (0-999) split statically across the four L1 caches (so the first L1 would get (0-249), the second would get (250-499), etc). Then the threads will use a dynamic,1 schedule to grab iterations from the L1 cache units. There are currently four supported layers: L1, L2, L3, NUMA OMP_SCHEDULE can now read a hierarchical schedule with this syntax: OMP_SCHEDULE='EXPERIMENTAL LAYER,SCHED[,CHUNK][:LAYER,SCHED[,CHUNK]...]:SCHED,CHUNK And OMP_SCHEDULE can still read the normal SCHED,CHUNK syntax from before I've kept most of the hierarchical scheduling logic inside kmp_dispatch_hier.h to try to keep it separate from the rest of the code. Differential Revision: https://reviews.llvm.org/D47962 llvm-svn: 336571
* [OpenMP] Restructure loop code for hierarchical schedulingJonathan Peyton2018-07-091-1327/+917
| | | | | | | | | | | | | | | | | | | | | | This patch reorganizes the loop scheduling code in order to allow hierarchical scheduling to use it more effectively. In particular, the goal of this patch is to separate the algorithmic parts of the scheduling from the thread logistics code. Moves declarations & structures to kmp_dispatch.h for easier access in other files. Extracts the algorithmic part of __kmp_dispatch_init() and __kmp_dispatch_next() into __kmp_dispatch_init_algorithm() and __kmp_dispatch_next_algorithm(). The thread bookkeeping logic is still kept in __kmp_dispatch_init() and __kmp_dispatch_next(). This is done because the hierarchical scheduler needs to access the scheduling logic without the bookkeeping logic. To prepare for new pointer in dispatch_private_info_t, a new flags variable is created which stores the ordered and nomerge flags instead of them being in two separate variables. This will keep the dispatch_private_info_t structure the same size. Differential Revision: https://reviews.llvm.org/D47961 llvm-svn: 336568
* Fix some comments and formatting in kmp_dispatch.cppJonathan Peyton2018-01-041-8/+9
| | | | llvm-svn: 321831
* Remove const from variables with dynamic memoryJonas Hahnfeld2017-11-091-25/+25
| | | | | | | | | | | | | | | | | | | Allocated memory is typically not 'const' if it needs to be freed. This patch removes around 50 wrong const attributes, modifies the corresponding functions and finally gets rid of some const_casts. These have especially been strange for __kmp_str_fname_free() that added a 'const' to call __kmp_str_free() which removed it again. Two minor cleanups that I performed in this process: * __kmp_tool_libraries now lives in kmp_settings.cpp as it is used nowhere else. * __kmp_msg_empty was removed as it was never used and Clang now complained that it was assigned a string literal that is 'const char *'. Differential Revision: https://reviews.llvm.org/D39755 llvm-svn: 317797
* Revert "Updating implementation of OMPT as specified in OpenMP 5.0 Preview 2 ↵Jonas Hahnfeld2017-11-031-1/+0
| | | | | | | | (TR6)" This reverts commit r317339 which discarded some recent commits. llvm-svn: 317346
* Updating implementation of OMPT as specified in OpenMP 5.0 Preview 2 (TR6)Joachim Protze2017-11-031-0/+1
| | | | | | | | | | | The TR6 document is expected to be publically released around November 15. This patch does not implement OMPT for libomptarget. Patch by Simon Convent and Joachim Protze Differential Revision: https://reviews.llvm.org/D39182 llvm-svn: 317339
* Update implementation of OMPT to the specification OpenMP 5.0 Preview 1 (TR4).Joachim Protze2017-11-011-16/+80
| | | | | | | | | | | | | | The code is tested to work with latest clang, GNU and Intel compiler. The implementation is optimized for low overhead when no tool is attached shifting the cost to execution with tool attached. This patch does not implement OMPT for libomptarget. Patch by Simon Convent and Joachim Protze Differential Revision: https://reviews.llvm.org/D38185 llvm-svn: 317085
* Apply formatting changesJonathan Peyton2017-10-201-6/+4
| | | | | | | | | | .clang-format's comments are removed and a (hopefully) final set of formatting changes are applied. Differential Revision: https://reviews.llvm.org/D38837 Differential Revision: https://reviews.llvm.org/D38920 llvm-svn: 316227
* Remove unnecessary semicolonsJonathan Peyton2017-09-271-4/+4
| | | | | | | | Removes semicolons after if {} blocks, function definitions, etc. I was able to apply the large OMPT patch cleanly on top of this one with no conflicts. llvm-svn: 314340
* Minor code cleanup of Klocwork issuesJonathan Peyton2017-09-051-10/+8
| | | | | | | | | | | Minor code cleanup of Klocwork issues. Fatal messages are given no return attribute. Define and use KMP_NORETURN to work for multiple C++ versions. Patch by Terry Wilmarth Differential Revision: https://reviews.llvm.org/D37275 llvm-svn: 312538
* OpenMP RTL cleanup: eliminated warnings with -Wcast-qual, patch 2.Andrey Churbanov2017-07-171-12/+11
| | | | | | | | | Changes are: got all atomics to accept volatile pointers that allowed to simplify many type conversions. Windows specific code fixed correspondingly. Differential Revision: https://reviews.llvm.org/D35417 llvm-svn: 308164
* remove deprecated register storage class specifierEd Maste2017-07-071-22/+22
| | | | | | | | | | While importing libomp into the FreeBSD base system we encountered Clang warnings that "'register' storage class specifier is deprecated and incompatible with C++1z [-Wdeprecated-register]". Differential Revision: https://reviews.llvm.org/D35124 llvm-svn: 307441
* OpenMP RTL cleanup: eliminated warnings with -Wcast-qual.Andrey Churbanov2017-07-031-16/+20
| | | | | | | | | | | Changes are: replaced C-style casts with cons_cast and reinterpret_cast; type of several counters changed to signed; type of parameters of 32-bit and 64-bit AND and OR intrinsics changes to unsigned; changed files formatted using clang-format version 3.8.1. Differential Revision: https://reviews.llvm.org/D34759 llvm-svn: 307020
* OpenMP 4.5: implemented support of schedule(simd:guided) andAndrey Churbanov2017-06-051-1/+128
| | | | | | | | | | schedule(simd:runtime) - library part. Compiler generation should use newly introduced scheduling kinds kmp_sch_guided_simd = 46, kmp_sch_runtime_simd = 47, as parameters to __kmpc_dispatch_init_* entries. Differential Revision: https://reviews.llvm.org/D31602 llvm-svn: 304724
* Clang-format and whitespace cleanup of source codeJonathan Peyton2017-05-121-2323/+2270
| | | | | | | | | | | | | This patch contains the clang-format and cleanup of the entire code base. Some of clang-formats changes made the code look worse in places. A best effort was made to resolve the bulk of these problems, but many remain. Most of the problems were mangling line-breaks and tabbing of comments. Patch by Terry Wilmarth Differential Revision: https://reviews.llvm.org/D32659 llvm-svn: 302929
* [stats] add stats-gathering for static_steal scheduling methodJonathan Peyton2017-02-171-0/+5
| | | | | | | | Add counter to count number of static_steal for loops Add counter for number of chunks executed per static_steal for loop Add counter for number of chunks stolen per static_steal for loop llvm-svn: 295461
* Cleanup: put i_maxmin members and ___kmp_size_type into traits_tJonathan Peyton2017-01-271-38/+6
| | | | | | | | | Put the duplicated i_maxmin into traits_t by adding new members max_value and min_value. Put ___kmp_size_type into traits_t by adding member type_size. Differential Revision: https://reviews.llvm.org/D28847 llvm-svn: 293316
* Follow up to r289732: Update comments in source files to reference .cpp filesJonathan Peyton2016-12-141-1/+1
| | | | | | Patch by Hansang Bae llvm-svn: 289739
* http://reviews.llvm.org/D22134: Implementation of OpenMP 4.5 nonmonotonic ↵Andrey Churbanov2016-07-111-74/+169
| | | | | | schedule modifier llvm-svn: 275052
* Improving EPCC performance when linking with hwlocJonathan Peyton2016-07-081-0/+6
| | | | | | | | | | | | | | When linking with libhwloc, the ORDERED EPCC test slows down on big machines (> 48 cores). Performance analysis showed that a cache thrash was occurring and this padding helps alleviate the problem. Also, inside the main spin-wait loop in kmp_wait_release.h, we can eliminate the references to the global shared variables by instead creating a local variable, oversubscribed and instead checking that. Differential Revision: http://reviews.llvm.org/D22093 llvm-svn: 274894
* Performance improvement: accessing thread struct as opposed to team structJonathan Peyton2016-06-211-12/+12
| | | | | | | | | | | Replaced readings of nproc from team structure with ones from thread structure to improve performance. Patch by Andrey Churbanov. Differential Revision: http://reviews.llvm.org/D21559 llvm-svn: 273293
* Renaming change: 41 -> 45 and 4.1 -> 4.5Jonathan Peyton2016-06-141-1/+1
| | | | | | | | OpenMP 4.1 is now OpenMP 4.5. Any mention of 41 or 4.1 is replaced with 45 or 4.5. Also, if the CMake option LIBOMP_OMP_VERSION is 41, CMake warns that 41 is deprecated and to use 45 instead. llvm-svn: 272687
* Bug fix for Bugzilla bug 26602: Remove function bodies with KMP_ASSERT(0)Jonathan Peyton2016-06-131-4/+4
| | | | | | | | | | | | | | | | Fix for bugzilla https://llvm.org/bugs/show_bug.cgi?id=26602. Removed functions body consisted of the only KMP_ASSERT(0) statement. Thus possible runtime crash converted to compile-time error, which looks preferable (faster possible error detection). TODO: consider C++11 static assert as an alternative, that could make the diagnostics better. Patch by Andrey Churbanov Differential Revision: http://reviews.llvm.org/D21304 llvm-svn: 272590
* Use C++11 atomics for ticket locks implementationPaul Osmialowski2016-05-311-0/+26
| | | | | | | | | | | | | | | | | | | | | | This patch replaces use of compiler builtin atomics with C++11 atomics for ticket locks implementation. Ticket locks are used in critical places of the runtime, e.g. in the tasking mechanism. The main reason this change was introduced is the problem with work stealing function on ARM architecture which suffered from nasty race condition. It turned out that the root cause of the problem lies in the way ticket locks are implemented. Changing compiler builtins into C++11 atomics solves the problem. Two assertions were added into kmp_tasking.c which are useful for detecting early symptoms of something wrong going on with work stealing, which were among the possible outcomes of the race condition. Differential Revision: http://reviews.llvm.org/D19878 llvm-svn: 271324
* Offer API for setting number of loop dispatch buffersJonathan Peyton2016-05-311-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The problem is the lack of dispatch buffers when thousands of loops with nowait, about 10 iterations each, are executed by hundreds of threads. We only have built-in 7 dispatch buffers, but there is a need in dozens or hundreds of buffers. The problem can be fixed by setting KMP_MAX_DISP_BUF to bigger value. In order to give users same possibility I changed build-time control into run-time one, adding API just in case. This change adds an environment variable KMP_DISP_NUM_BUFFERS and a new API function kmp_set_disp_num_buffers(int num_buffers). The KMP_DISP_NUM_BUFFERS envirable works only before serial initialization, because during the serial initialization we already allocate buffers for the hot team, so it is too late to change the number of buffers later (or we need to reallocate buffers for all teams which sounds too complicated). The kmp_set_defaults() routine does not work for this envirable, because it calls serial initialization before reading the parameter string. So a new routine, kmp_set_disp_num_buffers(), is created so that it can set our internal global variable before the library initialization. If both the envirable and API used the envirable wins. Differential Revision: http://reviews.llvm.org/D20697 llvm-svn: 271318
* [STATS] Use partitioned timer schemeJonathan Peyton2016-05-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | This change removes the current timers with ones that partition time properly. The current timers are nested, so that if a new timer, B, starts when the current timer, A, is already timing, A's time will include B's. To eliminate this problem, the partitioned timers are designed to stop the current timer (A), let the new timer run (B), and when the new timer is finished, restart the previously running timer (A). With this partitioning of time, a threads' timers all sum up to the OMP_worker_thread_life time and can now easily show the percentage of time a thread is spending in different parts of the runtime or user code. There is also a new state variable associated with each thread which tells where it is executing a task. This corresponds with the timers: OMP_task_*, e.g., if time is spent in OMP_task_taskwait, then that thread executed tasks inside a #pragma omp taskwait construct. The changes are mostly changing the MACROs to use the new PARITIONED_* macros, the new partitionedTimers class and its methods, and new state logic. Differential Revision: http://reviews.llvm.org/D19229 llvm-svn: 268640
* Fix trip count calculation for parallel loops in runtimeJonathan Peyton2016-04-181-18/+26
| | | | | | | | | | | | | | | The trip count calculation was incorrect for loops with large bounds. For example, for(int i=-2,000,000,000; i < 2,000,000,000; i+=50000000), the trip count calculation had overflow (trying to calculate 2,000,000,000 + 2,000,000,000 with signed integers) and wasn't giving the right value. This patch fixes this error in the runtime by using unsigned integers instead. There is still a bug in the clang compiler component because it warns that there is overflow in the test case file when there isn't. This error isn't there for the Intel Compiler. So for now, the test case is designated as XFAIL. Differential Revision: http://reviews.llvm.org/D19078 llvm-svn: 266677
* Add new OpenMP 4.5 doacross loop nest featureJonathan Peyton2016-03-021-1/+6
| | | | | | | | | | | | | | | | | | | | | | From the standard: A doacross loop nest is a loop nest that has cross-iteration dependence. An iteration is dependent on one or more lexicographically earlier iterations. The ordered clause parameter on a loop directive identifies the loop(s) associated with the doacross loop nest. The init/fini routines allocate/free doacross buffer(s) for each loop for each thread. The wait routine waits for a flag designated by the dependence vector. The post routine sets the flag designated by current iteration vector. We use a similar technique of shared buffer indices that covers up to 7 nowait loops executed simultaneously by different threads (number 7 has no real meaning, just heuristic value). Also, the size of structures are kept intact via reducing dummy arrays. This needs to be put into the OpenMP runtime library in order for the compiler team to develop the compiler side of the implementation. Differential Revision: http://reviews.llvm.org/D17399 llvm-svn: 262532
* dd new OpenMP 4.5 schedule clause modifiers (monotonic/non-monotonic) featureJonathan Peyton2016-02-251-0/+8
| | | | | | | | | | | | | | | | | The monotonic/non-monotonic flags are sent to the runtime via the sched_type by setting the 30th (non-monotonic) or 29th (monotonic) bit in the sched_type. Macros are added to probe if monotonic or non-monotonic is specified (SCHEDULE_HAS_[NON]MONOTONIC & SCHEDULE_HAS_NO_MODIFIERS) and also to to get the base sched_type (SCHEDULE_WITHOUT_MODIFIERS) Currently, nothing is done with the modifiers. Also, this patch adds some comments on the use of the enumerations in at least one place where it is subtle. Differential Revision: http://reviews.llvm.org/D17406 llvm-svn: 261906
* Removed unused __kmp_*_i8 functions.Jonathan Peyton2016-01-041-54/+0
| | | | llvm-svn: 256790
* Fix for ittnotify loop reportingJonathan Peyton2015-11-121-1/+3
| | | | | | | | Fix ittnotify loop metadata reporting for schedule(runtime) and chunked schedule set via OMP_SCHEDULE. The bug was that chunk=1 reported always. llvm-svn: 252952
* Fix for zero chunk sizeJonathan Peyton2015-11-061-0/+3
| | | | | | | | Setting dynamic schedule with chunk size 0 via omp_set_schedule(dynamic,0) and then using "schedule (runtime)" causes infinite loop because for the chunked dynamic schedule we didn't correct zero chunk to the default (1). llvm-svn: 252338
* [OMPT] Simplify control variable logic for OMPTJonathan Peyton2015-09-211-2/+2
| | | | | | | | | | | | | | | Prior to this change, OMPT had a status flag ompt_status, which could take several values. This was due to an earlier OMPT design that had several levels of enablement (ready, disabled, tracking state, tracking callbacks). The current OMPT design has OMPT support either on or off. This revision replaces ompt_status with a boolean flag ompt_enabled, which simplifies the runtime logic for OMPT. Patch by John Mellor-Crummey Differential Revision: http://reviews.llvm.org/D12999 llvm-svn: 248189
* Fix the OpenMP 3.0 buildJonathan Peyton2015-09-211-1/+1
| | | | | | | | | | | This change adds guards to the code in places where they are missing to enable the OpenMP 3.0 build. Patch by Diego Caballero and Johnny Peyton Mailing List: http://lists.llvm.org/pipermail/openmp-dev/2015-September/000935.html llvm-svn: 248178
* Tidy statistics collectionJonathan Peyton2015-08-111-9/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This removes some statistics counters and timers which were not used, adds new counters and timers for some language features that were not monitored previously and separates the counters and timers into those which are of interest for investigating user code and those which are only of interest to the developer of the runtime itself. The runtime developer statistics are now ony collected if the additional #define KMP_DEVELOPER_STATS is set. Additional user statistics which are now collected include: * Count of nested parallelism (omp parallel inside a parallel region) * Count of omp distribute occurrences * Count of omp teams occurrences * Counts of task related statistics (taskyield, task execution, task cancellation, task steal) * Values passed to omp_set_numtheads * Time spent in omp single and omp master None of this affects code compiled without stats gathering enabled, which is the normal library build mode. This also fixes the CMake build by linking to the standard c++ library when building the stats library as it is a requirement. The normal library does not have this requirement and its link phase is left alone. Differential Revision: http://reviews.llvm.org/D11759 llvm-svn: 244677
* fixed typo in debug assertion reported by John Mellor-CrummeyAndrey Churbanov2015-07-131-1/+1
| | | | llvm-svn: 242043
* Remove unused variable warnings by adding proper macro guards.Jonathan Peyton2015-06-081-0/+2
| | | | | | | | | As an ongoing effort to sanitize the openmp code, these changes remove unused variables by adding proper macros around both variables and functions. Patch by Jack Howarth llvm-svn: 239330
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