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This patch introduces a new custom memory allocator for use with pinned memory (in the case where the Cuda allocator isn't available). In future, this allocator will also be used for Managed Memory. Both memories are incompatible with the system malloc because allocated memory cannot share a page with memory allocated for other purposes. This means that small allocations will no longer consume an entire page of pinned memory. Unfortunately, it also means that pinned memory pages will never be unmapped (although they may be reused). This isn't a technical limitation; the "free" algorithm could be extended in future, if needed. The implementation is not perfect; there are various corner cases (especially related to extending onto new pages) where allocations and reallocations may be sub-optimal, but it should still be a step forward in support for small allocations. I have considered using libmemkind's "fixed" memory but rejected it for three reasons: 1) libmemkind may not always be present at runtime, 2) there's no currently documented means to extend a "fixed" kind one page at a time (although the code appears to have an undocumented function that may do the job, and/or extending libmemkind to support the MAP_LOCKED mmap flag with its regular kinds would be straight-forward), 3) Managed Memory benefits from having the metadata located in different memory and using an external implementation makes it hard to guarantee this. libgomp/ChangeLog: * Makefile.am (libgomp_la_SOURCES): Add simple-allocator.c. * Makefile.in: Regenerate. * basic-allocator.c: Mention simple-allocator in the comment. * config/linux/allocator.c: Include unistd.h. (pin_ctx): New variable. (ctxlock): New variable. (linux_init_pin_ctx): New function. (linux_memspace_alloc): Use simple-allocator for pinned memory. (linux_memspace_free): Likewise. (linux_memspace_realloc): Likewise. * libgomp.h (gomp_simple_alloc_init_context): New prototype. (gomp_simple_alloc_register_memory): New prototype. (gomp_simple_alloc): New prototype. (gomp_simple_free): New prototype. (gomp_simple_realloc): New prototype. * libgomp.texi: Update pinned memory trait documentation. * testsuite/libgomp.c/alloc-pinned-8.c: New test. * simple-allocator.c: New file.
153 lines
4.6 KiB
Makefile
153 lines
4.6 KiB
Makefile
## Process this file with automake to produce Makefile.in
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AUTOMAKE_OPTIONS = info-in-builddir
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ACLOCAL_AMFLAGS = -I .. -I ../config
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SUBDIRS = testsuite
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## May be used by toolexeclibdir.
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gcc_version := $(shell @get_gcc_base_ver@ $(top_srcdir)/../gcc/BASE-VER)
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config_path = @config_path@
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search_path = $(addprefix $(top_srcdir)/config/, $(config_path)) $(top_srcdir) \
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$(top_srcdir)/../include
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fincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)$(MULTISUBDIR)/finclude
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libsubincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)/include
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vpath % $(strip $(search_path))
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AM_CPPFLAGS = $(addprefix -I, $(search_path))
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AM_CFLAGS = $(XCFLAGS)
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AM_LDFLAGS = $(XLDFLAGS) $(SECTION_LDFLAGS) $(OPT_LDFLAGS)
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toolexeclib_LTLIBRARIES = libgomp.la
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nodist_toolexeclib_HEADERS = libgomp.spec
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if LIBGOMP_BUILD_VERSIONED_SHLIB
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# -Wc is only a libtool option.
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comma = ,
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PREPROCESS = $(subst -Wc$(comma), , $(COMPILE)) -E
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libgomp.ver: $(top_srcdir)/libgomp.map
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$(EGREP) -v '#(#| |$$)' $< | \
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$(PREPROCESS) -P -include config.h - > $@ || (rm -f $@ ; exit 1)
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if LIBGOMP_BUILD_VERSIONED_SHLIB_GNU
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libgomp_version_script = -Wl,--version-script,libgomp.ver
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libgomp_version_dep = libgomp.ver
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endif
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if LIBGOMP_BUILD_VERSIONED_SHLIB_SUN
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libgomp_version_script = -Wl,-M,libgomp.ver-sun
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libgomp_version_dep = libgomp.ver-sun
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libgomp.ver-sun : libgomp.ver \
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$(top_srcdir)/../contrib/make_sunver.pl \
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$(libgomp_la_OBJECTS) $(libgomp_la_LIBADD)
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perl $(top_srcdir)/../contrib/make_sunver.pl \
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libgomp.ver \
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$(libgomp_la_OBJECTS) $(libgomp_la_LIBADD) \
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> $@ || (rm -f $@ ; exit 1)
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endif
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else
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libgomp_version_script =
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libgomp_version_dep =
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endif
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libgomp_version_info = -version-info $(libtool_VERSION)
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if ENABLE_DARWIN_AT_RPATH
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libgomp_darwin_rpath = -Wc,-nodefaultrpaths
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libgomp_darwin_rpath += -Wl,-rpath,@loader_path
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endif
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libgomp_la_LDFLAGS = $(libgomp_version_info) $(libgomp_version_script) \
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$(lt_host_flags) $(libgomp_darwin_rpath)
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libgomp_la_LIBADD =
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libgomp_la_DEPENDENCIES = $(libgomp_version_dep)
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libgomp_la_LINK = $(LINK) $(libgomp_la_LDFLAGS)
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libgomp_la_SOURCES = alloc.c atomic.c barrier.c critical.c env.c error.c \
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icv.c icv-device.c iter.c iter_ull.c loop.c loop_ull.c ordered.c \
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parallel.c scope.c sections.c single.c task.c team.c work.c lock.c \
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mutex.c proc.c sem.c bar.c ptrlock.c time.c fortran.c affinity.c \
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target.c splay-tree.c libgomp-plugin.c oacc-parallel.c oacc-host.c \
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oacc-init.c oacc-mem.c oacc-async.c oacc-plugin.c oacc-cuda.c \
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priority_queue.c affinity-fmt.c teams.c allocator.c simple-allocator.c \
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oacc-profiling.c oacc-target.c target-indirect.c target-cxa-dso-dtor.c
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include $(top_srcdir)/plugin/Makefrag.am
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if USE_FORTRAN
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libgomp_la_SOURCES += openacc.f90
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endif
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nodist_noinst_HEADERS = libgomp_f.h
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nodist_libsubinclude_HEADERS = omp.h openacc.h acc_prof.h
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if USE_FORTRAN
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nodist_finclude_HEADERS = omp_lib.h omp_lib.f90 omp_lib.mod omp_lib_kinds.mod \
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openacc_lib.h openacc.f90 openacc.mod openacc_kinds.mod
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endif
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LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
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LINK = $(LIBTOOL) --tag CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link \
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$(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LTLDFLAGS) -o $@
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omp_lib_kinds.mod: omp_lib.mod
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:
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openacc_kinds.mod: openacc.mod
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:
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openacc.mod: openacc.lo
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:
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%.mod: %.f90
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$(FC) $(FCFLAGS) -cpp -fopenmp -fsyntax-only -Wno-c-binding-type $<
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fortran.lo: libgomp_f.h
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fortran.o: libgomp_f.h
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env.lo: libgomp_f.h
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env.o: libgomp_f.h
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# Automake Documentation:
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# If your package has Texinfo files in many directories, you can use the
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# variable TEXINFO_TEX to tell Automake where to find the canonical
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# `texinfo.tex' for your package. The value of this variable should be
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# the relative path from the current `Makefile.am' to `texinfo.tex'.
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TEXINFO_TEX = ../gcc/doc/include/texinfo.tex
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# Defines info, dvi, pdf and html targets
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MAKEINFOFLAGS = -I $(srcdir)/../gcc/doc/include
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info_TEXINFOS = libgomp.texi
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# AM_CONDITIONAL on configure option --generated-files-in-srcdir
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if GENINSRC
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STAMP_GENINSRC = stamp-geninsrc
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else
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STAMP_GENINSRC =
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endif
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# AM_CONDITIONAL on configure check ACX_CHECK_PROG_VER([MAKEINFO])
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if BUILD_INFO
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STAMP_BUILD_INFO = stamp-build-info
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else
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STAMP_BUILD_INFO =
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endif
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all-local: $(STAMP_GENINSRC)
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stamp-geninsrc: libgomp.info
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cp -p $(top_builddir)/libgomp.info $(srcdir)/libgomp.info
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@touch $@
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libgomp.info: $(STAMP_BUILD_INFO)
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stamp-build-info: libgomp.texi
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$(MAKEINFO) $(AM_MAKEINFOFLAGS) $(MAKEINFOFLAGS) -I $(srcdir) -o libgomp.info $(srcdir)/libgomp.texi
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@touch $@
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CLEANFILES = $(STAMP_GENINSRC) $(STAMP_BUILD_INFO)
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MAINTAINERCLEANFILES = $(srcdir)/libgomp.info
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# target overrides
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-include $(tmake_file)
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include $(top_srcdir)/../multilib.am
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