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
Two symbols for the external debugger support were incorrectly exported when LIBOMP_USE_DEBUGGER=off.
Differential Revision: http://reviews.llvm.org/D11763
llvm-svn: 244217
I was getting this cmake error on Mac OS X:
CMake Error: Error in cmake code at
/tmp/openmp/runtime/cmake/LibompMicroTests.cmake:140:
Parse error. Function missing ending ")". Instead found bad character with text "[".
Perhaps invoking 'test' is less confusing for cmake.
Differential Revision: http://reviews.llvm.org/D11493
llvm-svn: 243165
Compiling simple testcase with g++ and linking it to the LLVM OpenMP runtime
compiled in debug mode trips an assertion that produces a fatal error. When
the assertion is skipped, the program runs successfully to completion and
produces the same answer as the sequential code. Intel will restore the
assertion with a patch that fixes the issues that cause it to trip.
Patch by John Mellor-Crummey
Differential Revision: http://reviews.llvm.org/D11269
llvm-svn: 243032
libomp_check_linker_flag rewrites src_to_link.c and CMakeLists.txt in build
directory for test project, but cmake does not rebuild the project. The root
cause is that on some filesystems (ext3, reiserfs) timestamp resoultion is 1
second. So cmake does not rebuild test project if check takes less than 1 second.
This patch puts each test in its own directory to avoid the timestamp problem.
Patch by Chris Bergstrom
http://lists.cs.uiuc.edu/pipermail/openmp-dev/2015-July/000817.html
llvm-svn: 243017
This patch makes it possible for a performance tool that uses call stack
unwinding to map implementation-level call stacks from master and worker
threads into a unified global view. There are several components to this patch.
include/*/ompt.h.var
Add a new enumeration type that indicates whether the code for a master task
for a parallel region is invoked by the user program or the runtime system
Change the signature for OMPT parallel begin/end callbacks to indicate whether
the master task will be invoked by the program or the runtime system. This
enables a performance tool using call stack unwinding to handle these two
cases differently. For this case, a profiler that uses call stack unwinding
needs to know that the call path prefix for the master task may differ from
those available within the begin/end callbacks if the program invokes the
master.
kmp.h
Change the signature for __kmp_join_call to take an additional parameter
indicating the fork_context type. This is needed to supply the OMPT parallel
end callback with information about whether the compiler or the runtime
invoked the master task for a parallel region.
kmp_csupport.c
Ensure that the OMPT task frame field reenter_runtime_frame is properly set
and cleared before and after calls to fork and join threads for a parallel
region.
Adjust the code for the new signature for __kmp_join_call.
Adjust the OMPT parallel begin callback invocations to carry the extra
parameter indicating whether the program or the runtime invokes the master
task for a parallel region.
kmp_gsupport.c
Apply all of the analogous changes described for kmp_csupport.c for the GOMP
interface
Add OMPT support for the GOMP combined parallel region + loop API to
maintain the OMPT task frame field reenter_runtime_frame.
kmp_runtime.c:
Use the new information passed by __kmp_join_call to adjust the OMPT
parallel end callback invocations to carry the extra parameter indicating
whether the program or the runtime invokes the master task for a parallel
region.
ompt_internal.h:
Use the flavor of the parallel region API (GNU or Intel) to determine who
invokes the master task.
Differential Revision: http://reviews.llvm.org/D11259
llvm-svn: 242817
clean up the build.
This disables all of the Clang warnings that fire for me when building
libomp.so on Linux with a recent Clang binary. Lots of these should
probably be fixed, but I want to at least get the build warning-clean
and make it easy to keep that way.
I also switched a bunch of the warnings that are used both for C and C++
compiles to check the flag with C compilation test.
Differential Revision: http://reviews.llvm.org/D11253
llvm-svn: 242604
I apologize for this nasty commit, but I somehow overlooked Chandler's
comment to re-indent these files to two space indention. I know this
is a horrible commit, but I figured if it was done quickly after the
first one, not too many conflicts would arise.
Again, I'm sorry and won't do this again.
llvm-svn: 242301
This commit improves numerous functionalities of the OpenMP CMake build
system to be more conducive with LLVM's build system and build philosophies.
The CMake build system, as it was before this commit, was not up to LLVM's
standards and did not implement the configuration stage like most CMake based
build systems offer (check for compiler flags, libraries, etc.) In order to
improve it dramatically in a short period of time, a large refactoring had
to be done.
The main changes done with this commit are as follows:
* Compiler flag checks - The flags are no longer grabbed from compiler specific
directories. They are checked for availability in config-ix.cmake and added
accordingly inside LibompHandleFlags.cmake.
* Feature checks were added in config-ix.cmake. For example, the standard CMake
module FindThreads is probed for the threading model to use inside the OpenMP
library.
* OS detection - There is no longer a LIBOMP_OS variable, OS-specifc build logic
is wrapped around the WIN32 and APPLE macros with !(WIN32 OR APPLE) meaning
a Unix flavor of some sort.
* Got rid of vestigial functions/macros/variables
* Added new libomp_append() function which is used everywhere to conditionally
or undconditionally append to a list
* All targets have the libomp prefix so as not to interfere with any other
project
* LibompCheckLinkerFlag.cmake module was added which checks for linker flags
specifically for building shared libraries.
* LibompCheckFortranFlag.cmake module was added which checks for fortran flag
availability.
* Removed most of the cruft from the translation between the perl+Makefile based
build system and this one. The remaining components that they share are
perl scripts which I'm in the process of removing.
There is still more left to do. The perl scripts still need to be removed, and
a config.h.in file (or similarly named) needs to be added with #cmakedefine lines
in it. But this is a much better first step than the previous system.
Differential Revision: http://reviews.llvm.org/D10656
llvm-svn: 242298
r242052 changed the name of OMPT placeholder functions to move them from
the omp_ name space to the ompt_ name space. This patch moves the names of the
types of these functions into the OMPT name space as well.
Patch by John Mellor-Crummey
Differential Revision: http://reviews.llvm.org/D11171
llvm-svn: 242155
1.) in kmp_csupport.c, move computation of parameters only needed for OMPT tracing
inside a conditional to reduce overhead if not receiving ompt_event_master_begin
callbacks.
2.) in kmp_gsupport.c, remove spurious reset of OMPT reenter_runtime_frame (which
is set in its caller, GOMP_parallel_start correct placement of #if OMP_TRACE so
that state is maintained even if tracing support not included.
3.) in z_Linux_util.c, add architecture independent support for OMPT by setting
and resetting OMPT's exit_frame_ptr before and after invoking a microtask.
4.) On the Intel MIC, the loader refuses to retain static symbols in the
libomp.so shared library, even though tools need them. The loader could not be
bullied into doing so. To accommodate this, I changed the visibility of OMPT
placeholder functions to public. This required additions in exports.so.txt,
adding extern "C" scoping in ompt-general.c so that the public placeholder
symbols won't be mangled.
Patch by John Mellor-Crummey
Differential Revision: http://reviews.llvm.org/D11062
llvm-svn: 242052
A while back, we made an initial change where dangerous C API functions were
replaced with macros that translated the dangerous API function calls to safer
function calls e.g., sprintf() replaced with KMP_SPRINTF() which translates to
sprintf_s() on Windows. Currently, the only operating system where this is
applicable is Windows. Unix-like systems are still using the dangerous API
e.g., KMP_SPRINTF() translates to sprintf(). Our own testing showed no
performance differences.
Differential Revision: http://reviews.llvm.org/D9918
llvm-svn: 241833
These changes enable external debuggers to conveniently interface with
the LLVM OpenMP Library. Structures are added which describe the important
internal structures of the OpenMP Library e.g., teams, threads, etc.
This feature is turned on by default (CMake variable LIBOMP_USE_DEBUGGER)
and can be turned off with -DLIBOMP_USE_DEBUGGER=off.
Differential Revision: http://reviews.llvm.org/D10038
llvm-svn: 241832
The OMPT status is never equal to ompt_status_track. ompt_status_track = 0x2
and ompt_status_track_callback = 0x6 just share a bit, so that we can check
for traceing and callbacks with the same status.
Patch by Tim Cramer
Differential Revision: http://reviews.llvm.org/D10863
llvm-svn: 241167
At the suggestion of Chandler Carruth, I've removed the timestamp macro,
_KMP_BUILD_TIME, that cmake currently sets to "No_Timestamp" and replaced it with standard
__DATE__ and __TIME__ macros inside kmp_version.c.
llvm-svn: 240985
Remove use of assignment to multiple struct fields using .fieldname syntax.
This doesn't work with gcc 4.8 and earlier. Replace with elementwise field assignments.
Patch by John Mellor-Crummey
Differential Revision: http://reviews.llvm.org/D10798
llvm-svn: 240972
Fix OMPT support for barriers so that state changes occur even if OMPT_TRACE turned off.
These state changes are needed by performance tools that use callbacks for either
ompt_event_wait_barrier_begin or ompt_event_wait_barrier_end. Change ifdef flag to OMPT_BLAME
for callbacks ompt_event_wait_barrier_begin or ompt_event_wait_barrier_end rather than
OMPT_TRACE -- they were misclassified. Without this patch, when the runtime is compiled with
LIBOMP_OMPT_SUPPORT=true, LIBOMP_OMPT_BLAME=true, and LIBOMP_OMPT_TRACE=false, and a callback
is registered for either ompt_event_wait_barrier_begin or ompt_event_wait_barrier_end, then an
assertion will trip. Fix the scoping of one OMPT_TRACE ifdef, which should not have surrounded
an update of an OMPT state. Add a missing initialization of an OMPT task id for an implicit task.
Patch by John Mellor-Crummey
Differential Revision: http://reviews.llvm.org/D10759
llvm-svn: 240970
This fix allows the machine hierarchy to be expanded in case it needs to handle
more threads. It adds a resize function to accomplish this.
Differential Revision: http://reviews.llvm.org/D9900
llvm-svn: 240292
I tried to compile with Visual Studio using CMake and found these two sections of code
causing problems for Visual Studio. The first one removes the use of variable length
arrays by instead using KMP_ALLOCA(). The second part eliminates a redundant cpuid
assembly call by using the already existing __kmp_x86_cpuid() call instead.
llvm-svn: 240290
Currently, OMPT support requires the weak attribute which isn't supported
on Windows. This patch has CMake error out when LIBOMP_OMPT_SUPPORT=true
and the users is building on Windows.
http://lists.cs.uiuc.edu/pipermail/openmp-dev/2015-June/000692.html
Patch by Jonas Hahnfeld
llvm-svn: 239912
Add new LIBOMP_ENABLE_ASSERTIONS macro which can be set in a standalone build
or takes the value of LLVM_ENABLE_ASSERTIONS when inside llvm/projects. This
change also defines the KMP_BUILD_ASSERT() macro to do nothing when ENABLE_ASSERTIONS
is off. This means the __kmp_build_check_* types won't be defined and thus, no warnings.
http://lists.cs.uiuc.edu/pipermail/openmp-dev/2015-June/000719.html
Patch by Jack Howarth and Jonathan Peyton
llvm-svn: 239546
Most CMake build systems put CMakeLists.txt files inside source directories where
items need to get built. This change follows that convention by adding a new
runtime/src/CMakeLists.txt file. An additional benefit is this helps logically
seperate configuring with building as well. This change is mostly just copying and
pasting the bottom half of runtime/CMakeLists.txt into runtime/src/CMakeLists.txt,
but a few changes had to be made to get it to work. Most of those changes were to
directory prefixes.
Differential Revision: http://reviews.llvm.org/D10344
llvm-svn: 239542
As an ongoing effort to sanitize the openmp code, this one word change
eliminates creating 1 byte arrays named __kmp_build_check_* and instead
creates one byte array types. The KMP_BUILD_ASSERT macro still offers the same
functionality; array types with negative number of elements is illegal
and will cause a compiler failure.
llvm-svn: 239337
As an ongoing effort to sanitize the openmp code, these changes move
variables under already existing macro guards.
Patch by Jack Howarth
llvm-svn: 239331
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
Some variables are convenient to keep around even if they aren't
really used in a release build. This is often seen in DEBUG guarded code where the variable
is only used in a DEBUG build.
Patch by Jack Howarth
llvm-svn: 239326
As an ongoing effort to sanitize the openmp code, these changes remove unused functions.
The unused functions are:
__kmp_fini_allocator_thread(), __kmp_env_isDefined(), __kmp_strip_quotes(),
__kmp_convert_to_seconds(), and __kmp_convert_to_nanoseconds().
Patch by Jack Howarth
llvm-svn: 239323
when compiling with gcc or clang numerous warnings concerning the usage
of extern "C" linkage. All the __kmp_itt_sync* variables are declared
like: extern "C" type __kmp_itt_sync... = definition; through various macros.
This note from cppreference.com explains why this is a problem.
// From http://en.cppreference.com/w/cpp/language/language_linkage
extern "C" int x; // a declaration and not a definition
// The above line is equivalent to extern "C" { extern int x; }
extern "C" { int x; } // a declaration and definition
Since the __kmp_itt_* variables are being declared and defined, these variables
should use the bracketed version instead.
llvm-svn: 239184
This change changes kmp_bstate.old_tid to sign integer instead of unsigned integer.
It also defines two new macros KMP_NSEC_PER_SEC and KMP_USEC_PER_SEC which lets us take
control of the sign (we want them to be longs). Also, in kmp_wait_release.h, the byteref()
function's return type is changed from char to unsigned char.
llvm-svn: 239057
The following change is needed to suppress the "variable 'retval' is used
uninitialized whenever 'if' condition is false" warnings in runtime/src/kmp_csupport.c.
This change just initializes 'retval' to 0.
http://lists.cs.uiuc.edu/pipermail/openmp-dev/2015-June/000667.html
Patch by Jack Howarth
llvm-svn: 238954
in kmp_wait_release.h, there were some constructors where the initialization
lists were out of order with the member declarations inside the class. This
patch just reorders the initialization list so the compiler doesn't complain.
http://lists.cs.uiuc.edu/pipermail/openmp-dev/2015-June/000670.html
Patch by Jack Howarth and Jonathan Peyton
llvm-svn: 238946
This change produces a dynamic library named libomp instead of
libiomp5. Similar to the CMake change, it produces symlinks of libiomp5
in the exports/ directory for Unix systems and copies for Windows.
llvm-svn: 238720
This change has the CMake build system create a dynamic library named
libomp instead of libiomp5. Also any reference to libiomp is replaced
with libomp. One can still use the LIBOMP_LIB_NAME variable to enforce
a different name, and everything will still work as expected. An important
note is that libiomp5 and libgomp symlinks are created at install time when
on Unix systems. On Windows, copies are created with the legacy names.
llvm-svn: 238715
Jonathan Peyton