From 58d30c9475b76b388e278cfaf64d513addb02cd2 Mon Sep 17 00:00:00 2001
From: Thomas Applencourt <apl@anl.gov>
Date: Tue, 11 Jun 2024 20:12:14 +0000
Subject: [PATCH] interval may working

---
 mpi/Makefile.am                   |   81 ++-
 mpi/Makefile.in                   | 1074 +++++++++++++++++++++++++++++
 mpi/btx_mpiinterval_callbacks.cpp |   59 ++
 mpi/btx_mpimatching_model.yaml    |   31 +
 mpi/gen_babeltrace_mpi_lib.rb     |    8 +
 mpi/gen_babeltrace_mpi_model.rb   |  146 ++++
 mpi/gen_mpi_library.rb            |  334 +++++++++
 mpi/gen_mpi_library_base.rb       |  101 +++
 mpi/include/mpi.h                 |   13 +
 mpi/mpi.h.include                 |    2 +
 mpi/mpi_events.yaml               |    2 +
 11 files changed, 1848 insertions(+), 3 deletions(-)
 create mode 100644 mpi/Makefile.in
 create mode 100644 mpi/btx_mpiinterval_callbacks.cpp
 create mode 100644 mpi/btx_mpimatching_model.yaml
 create mode 100644 mpi/gen_babeltrace_mpi_lib.rb
 create mode 100644 mpi/gen_babeltrace_mpi_model.rb
 create mode 100644 mpi/gen_mpi_library.rb
 create mode 100644 mpi/gen_mpi_library_base.rb
 create mode 100644 mpi/mpi_events.yaml

diff --git a/mpi/Makefile.am b/mpi/Makefile.am
index c2af4904..4c516c59 100644
--- a/mpi/Makefile.am
+++ b/mpi/Makefile.am
@@ -39,15 +39,25 @@ MPI_MODEL = \
 	$(srcdir)/mpi_model.rb \
 	$(srcdir)/mpi_meta_parameters.yaml \
 	$(srcdir)/gen_probe_base.rb \
+	$(srcdir)/mpi_events.yaml \
 	$(top_srcdir)/utils/yaml_ast.rb \
 	$(top_srcdir)/utils/yaml_ast_lttng.rb \
 	$(top_srcdir)/utils/meta_parameters.rb \
 	$(top_srcdir)/utils/LTTng.rb \
 	$(MPI_EXTRACTED)
 
+mpi_babeltrace_model.yaml: $(srcdir)/gen_babeltrace_mpi_model.rb $(MPI_MODEL)
+	SRC_DIR=$(srcdir) $(RUBY) $< > $@
+
+CLEANFILES += \
+	mpi_babeltrace_model.yaml
+
 EXTRA_DIST += \
 	mpi_model.rb \
+	gen_mpi_library_base.rb \
 	gen_probe_base.rb \
+	mpi_events.yaml \
+	gen_babeltrace_mpi_model.rb \
 	$(srcdir)/mpi_meta_parameters.yaml
 
 MPI_PROBES = mpi_tracepoints
@@ -96,9 +106,6 @@ libmpitracepoints_la_CPPFLAGS = -I$(top_srcdir)/utils -I$(top_srcdir)/utils/incl
 libmpitracepoints_la_CFLAGS = -fPIC -Wall -Wextra -Wno-unused-parameter -Wno-type-limits -Wno-sign-compare $(WERROR) $(LTTNG_UST_CFLAGS)
 libmpitracepoints_la_LDFLAGS = $(LTTNG_UST_LIBS)
 
-lib_LTLIBRARIES = \
-	libTracerMPI.la
-
 nodist_libTracerMPI_la_SOURCES = \
 	$(MPI_PROBES_INCL) \
 	tracer_mpi.c
@@ -125,3 +132,71 @@ install-data-hook:
 
 EXTRA_DIST += mpi.h.include
 
+mpi_library.rb: $(srcdir)/gen_mpi_library.rb $(MPI_MODEL)
+	SRC_DIR=$(srcdir) $(RUBY) $< > $@
+
+babeltrace_mpi_lib.rb: $(srcdir)/gen_babeltrace_mpi_lib.rb $(top_srcdir)/utils/gen_library_base.rb $(MPI_MODEL) mpi_babeltrace_model.yaml
+	SRC_DIR=$(srcdir) $(RUBY) $< > $@
+
+MPI_BINDINGS = \
+	mpi_library.rb \
+	babeltrace_mpi_lib.rb
+
+EXTRA_DIST += \
+	gen_mpi_library.rb \
+	gen_babeltrace_mpi_lib.rb
+
+CLEANFILES += \
+	$(MPI_BINDINGS)
+
+data_DATA = \
+	$(MPI_BINDINGS)
+
+xprof_utils.hpp: $(top_srcdir)/utils/xprof_utils.hpp
+	cp $< $@
+
+BTX_MPI_GENERATED = \
+	btx_filter_mpi/metababel/metababel.h \
+	btx_filter_mpi/metababel/btx_component.h \
+	btx_filter_mpi/metababel/btx_component.c \
+	btx_filter_mpi/metababel/btx_upstream.h \
+	btx_filter_mpi/metababel/btx_upstream.c \
+	btx_filter_mpi/metababel/btx_downstream.h \
+	btx_filter_mpi/metababel/btx_downstream.c \
+	btx_filter_mpi/btx_main.c
+
+EXTRA_DIST += \
+	$(top_srcdir)/utils/babeltrace_to_metababel_model.rb \
+	$(top_srcdir)/xprof/btx_interval_model.yaml \
+	btx_mpimatching_model.yaml
+
+btx_mpi_model.yaml: $(top_srcdir)/utils/babeltrace_to_metababel_model.rb mpi_babeltrace_model.yaml
+	SRC_DIR=$(srcdir) $(RUBY) $^ > $@
+
+$(BTX_MPI_GENERATED) &: $(top_srcdir)/xprof/btx_interval_model.yaml btx_mpimatching_model.yaml btx_mpi_model.yaml
+	$(METABABEL) -u btx_mpi_model.yaml -d $(top_srcdir)/xprof/btx_interval_model.yaml -t FILTER -o btx_filter_mpi -p mpiinterval -c interval --matching $(srcdir)/btx_mpimatching_model.yaml -i mpi.h.include
+
+CLEANFILES += \
+	$(BTX_MPI_GENERATED) \
+	btx_mpi_model.yaml \
+	xprof_utils.hpp
+
+BUILT_SOURCES += \
+	$(BTX_MPI_GENERATED)
+
+nodist_libMPIInterval_la_SOURCES = \
+	$(BTX_MPI_GENERATED) \
+	xprof_utils.hpp
+
+libMPIInterval_la_SOURCES = \
+	btx_mpiinterval_callbacks.cpp
+
+libMPIInterval_la_CPPFLAGS = -I$(top_srcdir)/utils -I$(top_srcdir)/utils/include -I$(srcdir)/include -I./ -I./btx_filter_mpi
+libMPIInterval_la_CFLAGS = -Wall -Wextra -Wno-unused-parameter $(WERROR) $(BABELTRACE2_CFLAGS)
+libMPIInterval_la_CXXFLAGS = -std=c++17 -Wall -Wextra -Wno-unused-parameter $(WERROR) $(BABELTRACE2_CFLAGS)
+libMPIInterval_la_LDFLAGS = $(BABELTRACE2_LIBS) -avoid-version -module
+
+lib_LTLIBRARIES = \
+	libTracerMPI.la \
+	libMPIInterval.la
+
diff --git a/mpi/Makefile.in b/mpi/Makefile.in
new file mode 100644
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+@STRICT_FALSE@WERROR = 
+@STRICT_TRUE@WERROR = -Werror
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+	$(srcdir)/include/mpi.h
+
+MODIFIED_MPI_HDR = \
+	modified_include/mpi.h
+
+EXTRA_DIST = $(srcdir)/include extract_base.rb \
+	$(MPI_NAMESPACES:%=extract_%.rb) mpi_model.rb \
+	gen_mpi_library_base.rb gen_probe_base.rb mpi_events.yaml \
+	gen_babeltrace_mpi_model.rb $(srcdir)/mpi_meta_parameters.yaml \
+	gen_mpi_tracepoints.rb gen_mpi.rb mpi.h.include \
+	gen_mpi_library.rb gen_babeltrace_mpi_lib.rb \
+	$(top_srcdir)/utils/babeltrace_to_metababel_model.rb \
+	$(top_srcdir)/xprof/btx_interval_model.yaml \
+	btx_mpimatching_model.yaml
+MPI_NAMESPACES = mpi
+MPI_EXTRACTED = $(MPI_NAMESPACES:=_api.yaml)
+CLEANFILES = $(MPI_EXTRACTED) mpi_babeltrace_model.yaml \
+	$(MPI_PROBES_TP) $(MPI_PROBES_INCL) $(MPI_PROBES_SRC) \
+	tracer_mpi.c $(MPI_BINDINGS) $(BTX_MPI_GENERATED) \
+	btx_mpi_model.yaml xprof_utils.hpp
+MPI_MODEL = \
+	$(srcdir)/mpi_model.rb \
+	$(srcdir)/mpi_meta_parameters.yaml \
+	$(srcdir)/gen_probe_base.rb \
+        $(srcdir)/mpi_events.yaml \
+	$(top_srcdir)/utils/yaml_ast.rb \
+	$(top_srcdir)/utils/yaml_ast_lttng.rb \
+	$(top_srcdir)/utils/meta_parameters.rb \
+	$(top_srcdir)/utils/LTTng.rb \
+	$(MPI_EXTRACTED)
+
+MPI_PROBES = mpi_tracepoints
+MPI_PROBES_TP = $(MPI_PROBES:=.tp)
+MPI_PROBES_INCL = $(MPI_PROBES:=.h)
+MPI_PROBES_SRC = $(MPI_PROBES:=.c)
+BUILT_SOURCES = $(MODIFIED_MPI_HDR) $(MPI_PROBES_INCL) \
+	$(BTX_MPI_GENERATED)
+bin_SCRIPTS = \
+	tracer_mpi.sh
+
+noinst_LTLIBRARIES = \
+	libmpitracepoints.la
+
+nodist_libmpitracepoints_la_SOURCES = \
+	$(MPI_PROBES_INCL) \
+	$(MPI_PROBES_SRC)
+
+libmpitracepoints_la_CPPFLAGS = -I$(top_srcdir)/utils -I$(top_srcdir)/utils/include -I$(srcdir)/include -I./
+libmpitracepoints_la_CFLAGS = -fPIC -Wall -Wextra -Wno-unused-parameter -Wno-type-limits -Wno-sign-compare $(WERROR) $(LTTNG_UST_CFLAGS)
+libmpitracepoints_la_LDFLAGS = $(LTTNG_UST_LIBS)
+nodist_libTracerMPI_la_SOURCES = \
+	$(MPI_PROBES_INCL) \
+	tracer_mpi.c
+
+libTracerMPI_la_CPPFLAGS = -I$(top_srcdir)/utils -I$(top_srcdir)/utils/include -I$(top_srcdir)/sampling -I$(srcdir)/include -I./utils -I./
+libTracerMPI_la_CFLAGS = -Wall -Wextra $(WERROR) $(LIBFFI_CFLAGS) $(LTTNG_UST_CFLAGS)
+libTracerMPI_la_LDFLAGS = $(LTTNG_UST_LIBS) -ldl -lpthread $(LIBFFI_LIBS) ../sampling/libThapiSampling.la
+libTracerMPI_la_LIBADD = libmpitracepoints.la
+tmplibdir = $(libdir)/tmp
+MPI_BINDINGS = \
+	mpi_library.rb \
+	babeltrace_mpi_lib.rb
+
+data_DATA = \
+	$(MPI_BINDINGS)
+
+BTX_MPI_GENERATED = \
+	btx_filter_mpi/metababel/metababel.h \
+	btx_filter_mpi/metababel/btx_component.h \
+	btx_filter_mpi/metababel/btx_component.c \
+	btx_filter_mpi/metababel/btx_upstream.h \
+	btx_filter_mpi/metababel/btx_upstream.c \
+	btx_filter_mpi/metababel/btx_downstream.h \
+	btx_filter_mpi/metababel/btx_downstream.c \
+	btx_filter_mpi/btx_main.c
+
+nodist_libMPIInterval_la_SOURCES = \
+	$(BTX_MPI_GENERATED) \
+	xprof_utils.hpp
+
+libMPIInterval_la_SOURCES = \
+	btx_mpiinterval_callbacks.cpp
+
+libMPIInterval_la_CPPFLAGS = -I$(top_srcdir)/utils -I$(top_srcdir)/utils/include -I$(srcdir)/include -I./ -I./btx_filter_mpi
+libMPIInterval_la_CFLAGS = -Wall -Wextra -Wno-unused-parameter $(WERROR) $(BABELTRACE2_CFLAGS)
+libMPIInterval_la_CXXFLAGS = -std=c++17 -Wall -Wextra -Wno-unused-parameter $(WERROR) $(BABELTRACE2_CFLAGS)
+libMPIInterval_la_LDFLAGS = $(BABELTRACE2_LIBS) -avoid-version -module
+lib_LTLIBRARIES = \
+	libTracerMPI.la \
+	libMPIInterval.la
+
+all: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) all-am
+
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+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
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+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign mpi/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign mpi/Makefile
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+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
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+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
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+	done
+
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+	@list='$(lib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
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+
+clean-noinstLTLIBRARIES:
+	-test -z "$(noinst_LTLIBRARIES)" || rm -f $(noinst_LTLIBRARIES)
+	@list='$(noinst_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
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+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
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+	-rm -f btx_filter_mpi/*.$(OBJEXT)
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+	-rm -f btx_filter_mpi/metababel/*.$(OBJEXT)
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+tracer_mpi.c: $(srcdir)/gen_mpi.rb $(MPI_MODEL) $(MPI_PROBES_INCL)
+	SRC_DIR=$(srcdir) $(RUBY) $< > $@
+
+install-exec-hook:
+	$(MKDIR_P) $(DESTDIR)$(pkglibdir)/mpi
+	$(LN_S) -f $(DESTDIR)$(libdir)/libTracerMPI.so.1.0.0 $(DESTDIR)$(pkglibdir)/mpi/libmpi.so.1
+	$(LN_S) -f $(DESTDIR)$(pkglibdir)/cuda/libmpi.so.1 $(DESTDIR)$(pkglibdir)/mpi/libmpi.so
+
+uninstall-hook:
+	$(RM) -f $(DESTDIR)$(libdir)/libTracerMPI.so.1.0.0 $(DESTDIR)$(pkglibdir)/mpi/libmpi.so.1
+	$(RM) -f $(DESTDIR)$(pkglibdir)/mpi/libmpi.so.1 $(DESTDIR)$(pkglibdir)/mpi/libmpi.so
+	-rmdir $(DESTDIR)$(pkglibdir)/mpi
+install-data-hook:
+	$(RM) -r $(DESTDIR)$(tmplibdir)
+
+mpi_library.rb: $(srcdir)/gen_mpi_library.rb $(MPI_MODEL)
+	SRC_DIR=$(srcdir) $(RUBY) $< > $@
+
+babeltrace_mpi_lib.rb: $(srcdir)/gen_babeltrace_mpi_lib.rb $(top_srcdir)/utils/gen_library_base.rb $(MPI_MODEL) mpi_babeltrace_model.yaml
+	SRC_DIR=$(srcdir) $(RUBY) $< > $@
+
+xprof_utils.hpp: $(top_srcdir)/utils/xprof_utils.hpp
+	cp $< $@
+
+btx_mpi_model.yaml: $(top_srcdir)/utils/babeltrace_to_metababel_model.rb mpi_babeltrace_model.yaml
+	SRC_DIR=$(srcdir) $(RUBY) $^ > $@
+
+$(BTX_MPI_GENERATED) &: $(top_srcdir)/xprof/btx_interval_model.yaml btx_mpimatching_model.yaml btx_mpi_model.yaml
+	$(METABABEL) -u btx_mpi_model.yaml -d $(top_srcdir)/xprof/btx_interval_model.yaml -t FILTER -o btx_filter_mpi -p mpiinterval -c interval --matching $(srcdir)/btx_mpimatching_model.yaml -i mpi.h.include
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/mpi/btx_mpiinterval_callbacks.cpp b/mpi/btx_mpiinterval_callbacks.cpp
new file mode 100644
index 00000000..c2738bea
--- /dev/null
+++ b/mpi/btx_mpiinterval_callbacks.cpp
@@ -0,0 +1,59 @@
+#include <metababel/metababel.h>
+#include <tuple>
+#include <string>
+#include <mpi.h.include>
+#include "xprof_utils.hpp"
+
+
+struct data_s {
+  EntryState entry_state;
+};
+
+typedef struct data_s data_t;
+
+static void send_host_message(void *btx_handle, void *usr_data, int64_t ts,
+                              const char *event_class_name, const char *hostname, int64_t vpid,
+                              uint64_t vtid, bool err) {
+
+  std::string event_class_name_striped = strip_event_class_name_exit(event_class_name);
+  const int64_t entry_ts = static_cast<data_t *>(usr_data)->entry_state.get_ts(
+      {hostname, vpid, vtid});
+
+  btx_push_message_lttng_host(btx_handle, hostname, vpid, vtid, entry_ts, BACKEND_HIP,
+                              event_class_name_striped.c_str(), (ts - entry_ts), err);
+}
+
+void btx_initialize_component(void **usr_data) { *usr_data = new data_t; }
+
+void btx_finalize_component(void *usr_data) {
+  delete static_cast<data_t *>(usr_data);
+}
+
+static void entries_callback(void *btx_handle, void *usr_data, int64_t ts,
+                             const char *event_class_name, const char *hostname, int64_t vpid,
+                             uint64_t vtid) {
+  static_cast<data_t *>(usr_data)->entry_state.set_ts({hostname, vpid, vtid},
+                                                      ts);
+}
+
+static void exits_callback_mpiError_absent(void *btx_handle, void *usr_data, int64_t ts,
+                                           const char *event_class_name, const char *hostname,
+                                           int64_t vpid, uint64_t vtid) {
+
+  send_host_message(btx_handle, usr_data, ts, event_class_name, hostname, vpid, vtid, false);
+}
+
+static void exits_callback_mpiError_present(void *btx_handle, void *usr_data, int64_t ts,
+                                            const char *event_class_name, const char *hostname,
+                                            int64_t vpid, uint64_t vtid, int mpiResult) {
+
+  send_host_message(btx_handle, usr_data, ts, event_class_name, hostname, vpid, vtid, mpiResult != MPI_SUCCESS);
+}
+
+void btx_register_usr_callbacks(void *btx_handle) {
+  btx_register_callbacks_initialize_component(btx_handle, &btx_initialize_component);
+  btx_register_callbacks_finalize_component(btx_handle, &btx_finalize_component);
+  btx_register_callbacks_entries(btx_handle, &entries_callback);
+  btx_register_callbacks_exits_mpiError_absent(btx_handle, &exits_callback_mpiError_absent);
+  btx_register_callbacks_exits_mpiError_present(btx_handle, &exits_callback_mpiError_present);
+}
diff --git a/mpi/btx_mpimatching_model.yaml b/mpi/btx_mpimatching_model.yaml
new file mode 100644
index 00000000..73982178
--- /dev/null
+++ b/mpi/btx_mpimatching_model.yaml
@@ -0,0 +1,31 @@
+:environment:
+  :entries:
+  - :name: ^hostname$
+    :type: string
+:stream_classes:
+- :default_clock_class: {}
+  :event_common_context_field_class:
+    :type: structure
+    :members:
+    - :name: ^vpid$
+      :field_class:
+        :type: integer_signed
+    - :name: ^vtid$
+      :field_class:
+        :type: integer_unsigned
+  :event_classes:
+  - :set_id: entries
+    :name: "_entry$"
+  - :set_id: exits
+    :register: false
+    :name: "_exit$"
+  - :set_id: exits_mpiError_present
+    :domain: exits
+    :payload_field_class:
+      :type: structure
+      :members:
+      - :name: ^mpiResult$
+        :field_class:
+          :type: integer_signed
+  - :set_id: exits_mpiError_absent
+    :domain: exits - exits_mpiError_present
diff --git a/mpi/gen_babeltrace_mpi_lib.rb b/mpi/gen_babeltrace_mpi_lib.rb
new file mode 100644
index 00000000..05454f05
--- /dev/null
+++ b/mpi/gen_babeltrace_mpi_lib.rb
@@ -0,0 +1,8 @@
+require_relative 'gen_mpi_library_base.rb'
+require_relative '../utils/gen_babeltrace_lib_helper'
+
+puts <<EOF
+require_relative 'mpi_library.rb'
+EOF
+
+add_babeltrace_event_callbacks("mpi_babeltrace_model.yaml")
diff --git a/mpi/gen_babeltrace_mpi_model.rb b/mpi/gen_babeltrace_mpi_model.rb
new file mode 100644
index 00000000..db7f7bde
--- /dev/null
+++ b/mpi/gen_babeltrace_mpi_model.rb
@@ -0,0 +1,146 @@
+require_relative 'gen_mpi_library_base.rb'
+require_relative '../utils/gen_babeltrace_model_helper'
+
+$integer_sizes = INT_SIZE_MAP.transform_values { |v| v*8 }
+$integer_signed = INT_SIGN_MAP
+
+$all_enums.each { |t|
+  $integer_sizes["enum #{t.name}"] = 32
+}
+
+$all_enums.each { |t|
+  $integer_signed["enum #{t.name}"] = true
+}
+
+def integer_size(t)
+  return 64 if t.match(/\*/)
+  r = $integer_sizes[t]
+  raise "unknown integer type #{t}" if r.nil?
+  r
+end
+
+def integer_signed?(t)
+  return false if t.match(/\*/)
+  r = $integer_signed[t]
+  raise "unknown integer type #{t}" if r.nil?
+  r
+end
+
+def meta_parameter_types_name(m, dir)
+  if dir == :start
+    lttng = m.lttng_in_type
+  else
+    lttng = m.lttng_out_type
+  end
+  name = lttng.name
+  t = m.command[m.name].type.type
+
+  case m
+  when ScalarMetaParameter
+    if lttng.length
+      [["ctf_integer", "size_t", "_#{name}_length", nil],
+       [lttng.macro.to_s, "#{t} *", "#{name}", lttng]]
+    else
+      [[lttng.macro.to_s, "#{t}", "#{name}", lttng]]
+    end
+  when ArrayMetaParameter, InString, OutString, OutLTTng, InLTTng, ReturnString
+    if lttng.macro.to_s == "ctf_string"
+      [["ctf_string", "#{t} *", "#{name}", lttng]]
+    else
+      [["ctf_integer", "size_t", "_#{name}_length", nil],
+       [lttng.macro.to_s, "#{t} *", "#{name}", lttng]]
+    end
+  when ArrayByRefMetaParameter
+    [["ctf_integer", "size_t", "_#{name}_length", nil],
+     [lttng.macro.to_s, "#{t.type} *", "#{name}", lttng]]
+  when FixedArrayMetaParameter
+    [[lttng.macro.to_s, "#{t} *", "#{name}", lttng]]
+  when OutPtrString
+    [["ctf_string", "#{t}", "#{name}", lttng]]
+  else
+    raise "unsupported meta parameter class #{m.class} #{lttng.call_string} #{t}"
+  end
+end
+
+def get_fields_types_name(c, dir)
+   if dir == :start
+    fields = (c.parameters ? c.parameters : []).collect { |p|
+      [p.lttng_type.macro.to_s, p.type.to_s, p.name.to_s, p.lttng_type]
+    }
+    fields += c.meta_parameters.select { |m| m.kind_of?(In) }.collect { |m|
+      meta_parameter_types_name(m, :start)
+    }.flatten(1)
+  else
+    r = c.type.lttng_type
+    fields = if r
+        [[r.macro.to_s, c.type.to_s, "#{RESULT_NAME}", r]]
+      else
+        []
+    end
+    fields += c.meta_parameters.select { |m| m.kind_of?(Out) }.collect { |m|
+      meta_parameter_types_name(m, :stop)
+    }.flatten(1)
+  end
+  fields
+end
+
+event_classes = 
+  [[:lttng_ust_mpi, $mpi_commands]].collect { |provider, commands|
+    commands.collect { |c|
+      [gen_event_bt_model(provider, c, :start),
+      gen_event_bt_model(provider, c, :stop)]
+    }
+  }.flatten(2)
+
+mpi_events = YAML::load_file(File.join(SRC_DIR,"mpi_events.yaml"))
+event_classes += mpi_events.collect { |provider, es|
+  es["events"].collect { |event|
+    gen_extra_event_bt_model(provider, event)
+  }
+}.flatten
+
+environment = [
+  {
+    name: 'hostname',
+    class: 'string',
+  }
+]
+
+packet_context = [
+  {
+    name: 'cpu_id',
+    class: 'unsigned',
+    cast_type: 'uint64_t',
+    class_properties: {
+      field_value_range: 32
+    }
+  }
+]
+
+common_context = [
+  {
+    name: 'vpid',
+    class: 'signed',
+    cast_type: 'int64_t',
+    class_properties: {
+      field_value_range: 64,
+    }
+  },
+  {
+    name: 'vtid',
+    class: 'unsigned',
+    cast_type: 'uint64_t',
+    class_properties: {
+      field_value_range: 64,
+    }
+  }
+]
+
+puts YAML.dump({
+  name: "thapi_mpi",
+  environment: environment,
+  clock_snapshot_value: true,
+  packet_context: packet_context,
+  common_context: common_context,
+  event_classes: event_classes })
+
diff --git a/mpi/gen_mpi_library.rb b/mpi/gen_mpi_library.rb
new file mode 100644
index 00000000..31975569
--- /dev/null
+++ b/mpi/gen_mpi_library.rb
@@ -0,0 +1,334 @@
+require_relative 'gen_mpi_library_base.rb'
+
+def popcount(x)
+  raise "Unsigned integer needed!" if x < 0
+  c = 0
+  while x != 0
+    c += 1 if x & 1 != 0
+    x >>= 1
+  end
+  c
+end
+
+def firstbitpos(x)
+  raise "Signed positive integer needed!" if x <= 0
+  r = 0
+  while x & 1 == 0
+    r += 1
+    x >>= 1
+  end
+  r
+end
+
+def print_bitfield(name, enum)
+  special_values = []
+  members = []
+  default = nil
+  counter = 0
+  enum.members.each { |m|
+    if m.val
+      counter = eval(m.val)
+    else
+      counter += 1
+    end
+    if counter > 0 && popcount(counter) == 1
+      members.push [ m.name.to_sym, firstbitpos(counter) ]
+    else
+      if counter == 0
+        default = m.name.to_sym
+      else
+        r = [ m.name.to_sym ]
+        if m.val
+          r.push m.val
+        else
+          r.push counter
+        end
+        special_values.push r
+      end
+    end
+  }
+  print_lambda = lambda { |m|
+    "#{m[0].inspect}, #{m[1]}"
+  }
+  puts <<EOF
+  #{to_class_name(name)} = mpibitmask #{to_ffi_name(name)},
+    [ #{members.collect(&print_lambda).join(",\n      ")} ]
+EOF
+  if default
+    puts <<EOF
+  #{to_class_name(name)}.default = #{default.inspect}
+EOF
+  end
+  if !special_values.empty?
+    puts <<EOF
+  # #{special_values.collect(&print_lambda).join(",\n  # ")}
+EOF
+  end
+  puts "\n"
+end
+
+def print_enum(name, enum)
+  members = enum.members.collect { |m|
+    r = [ m.name.to_sym ]
+    r.push m.val if m.val
+    r
+  }
+  print_lambda = lambda { |m|
+    s = "#{m[0].inspect}"
+    s << ", #{m[1]}" if m.size == 2
+    s
+  }
+  puts <<EOF
+  #{to_class_name(name)} = mpienum #{to_ffi_name(name)},
+    [ #{members.collect(&print_lambda).join(",\n      ")} ]
+
+EOF
+end
+
+def print_mpi_object(object)
+  puts <<EOF
+  typedef :pointer, #{to_ffi_name(object)}
+
+EOF
+end
+
+puts <<EOF
+require 'ffi'
+module FFI
+
+  class MPIStruct < Struct
+    def self.enclosing_module
+      MPI
+    end
+
+    def to_h
+      members.zip(values).to_h
+    end
+
+    def to_s
+      s = "{ "
+      s << to_h.each.collect { |k, v|
+        if v.kind_of? Array
+          "\#{k}: [ \#{v.join(", ")} ]"
+        else
+          "\#{k}: \#{v}"
+        end
+      }.join(", ")
+      s << " }"
+      s
+    end
+  end
+  class MPIEnum < Enum
+  end
+  class MPIUnion < Union
+    def self.enclosing_module
+      MPI
+    end
+  end
+  class MPIBitmask < Bitmask
+    def default=(default)
+      @default = default
+    end
+
+    def []
+      if @default && query.size == 1
+        if query[0] == 0
+          return @default
+        elsif query[0] == @default
+          return 0
+        end
+      end
+      super
+    end
+
+    def to_native(query, ctx)
+      return 0 if query.nil?
+      flat_query = [query].flatten
+      return 0 if flat_query.size == 1 && query[0] == @default
+      super
+    end
+
+    def from_native(val, ctx)
+      return [@default] if val == 0 && @default
+      super
+    end
+  end
+  module Library
+    def mpibitmask(*args)
+      generic_enum(FFI::MPIBitmask, *args)
+    end
+    def mpienum(*args)
+      generic_enum(FFI::MPIEnum, *args)
+    end
+  end
+
+  class Struct::InlineArray
+    def to_s
+      s = "[ "
+      s << to_a.join(", ")
+      s << " ]"
+    end
+  end
+
+  class Pointer
+    def to_s
+      "0x%016x" % address
+    end
+  end
+end
+module MPI
+  extend FFI::Library
+
+  module Handle
+    def to_s
+      s = '{ reserved: "'
+      s << self[:reserved].to_a.collect { |v| "\\\\x%02x" % ((v + 256)%256) }.join
+      s << '" }'
+    end
+  end
+
+  module UUID
+    def to_s
+      a = self[:bytes].to_a.collect { |v| v < 0 ? 0x100 + v : v }
+      s = "{ id: "
+      s << "%02x" % a[0]
+      s << "%02x" % a[1]
+      s << "%02x" % a[2]
+      s << "%02x" % a[3]
+      s << "-"
+      s << "%02x" % a[4]
+      s << "%02x" % a[5]
+      s << "-"
+      s << "%02x" % a[6]
+      s << "%02x" % a[7]
+      s << "-"
+      s << "%02x" % a[8]
+      s << "%02x" % a[9]
+      s << "-"
+      s << "%02x" % a[10]
+      s << "%02x" % a[11]
+      s << "%02x" % a[12]
+      s << "%02x" % a[13]
+      s << "%02x" % a[14]
+      s << "%02x" % a[15]
+      s << " }"
+    end
+  end
+EOF
+
+def close_type(name)
+  $all_types.select { |t|
+    t.type.kind_of?(YAMLCAst::CustomType) && t.type.name == name
+  }.each { |t|
+    puts <<EOF
+  typedef #{to_ffi_name(name)}, #{to_ffi_name(t.name)}
+
+EOF
+    close_type(t.name)
+  }
+end
+
+def print_union(name, union)
+  members = union.to_ffi
+  print_lambda = lambda { |m|
+    s = "#{m[0]}, "
+    if m[1].kind_of?(Array)
+      s << "[ #{m[1][0]}, #{m[1][1]} ]"
+    else
+      s << "#{m[1]}"
+    end
+    s
+  }
+  puts <<EOF
+  class #{to_class_name(name)} < FFI::MPIUnion
+    layout #{members.collect(&print_lambda).join(",\n"+" "*11)}
+  end
+  typedef #{to_class_name(name)}.by_value, #{to_ffi_name(name)}
+
+EOF
+end
+
+def print_struct(name, struct)
+  members = struct.to_ffi
+  print_lambda = lambda { |m|
+    s = "#{m[0]}, "
+    if m[1].kind_of?(Array)
+      s << "[ #{m[1][0]}, #{m[1][1]} ]"
+    else
+      s << "#{m[1]}"
+    end
+    s
+  }
+  puts <<EOF
+  class #{to_class_name(name)} < FFI::MPIStruct
+EOF
+  puts <<EOF if to_class_name(name).match("UUID")
+    prepend UUID
+EOF
+  puts <<EOF if to_class_name(name).match(/Handle\z/)
+    prepend Handle
+EOF
+  puts <<EOF
+    layout #{members.collect(&print_lambda).join(",\n"+" "*11)}
+  end
+  typedef #{to_class_name(name)}.by_value, #{to_ffi_name(name)}
+
+EOF
+  close_type(name)
+end
+
+def print_function_pointer_type(name, func)
+  type, params = func.to_ffi
+  puts <<EOF
+  callback #{to_ffi_name(name)},
+           [ #{params.join(",\n"+" "*13)} ],
+           #{type}
+
+EOF
+end
+
+def print_pointer_type(name)
+  puts <<EOF
+  typedef :pointer, #{to_ffi_name(name)}
+
+EOF
+end
+
+def print_int_type(name, t_name)
+  puts <<EOF
+  typedef #{to_ffi_name(t_name)}, #{to_ffi_name(name)}
+EOF
+end
+
+$all_types.each { |t|
+  if t.type.kind_of? YAMLCAst::Enum
+    enum = $all_enums.find { |e| t.type.name == e.name }
+    if false
+      print_bitfield(t.name, enum)
+    else
+      print_enum(t.name, enum)
+    end
+  elsif $objects.include?(t.name)
+    print_mpi_object(t.name)
+  elsif t.type.kind_of? YAMLCAst::Struct
+    struct = $all_structs.find { |s| t.type.name == s.name }
+    next unless struct
+    print_struct(t.name, struct)
+  elsif t.type.kind_of? YAMLCAst::Union
+    union = $all_unions.find { |s| t.type.name == s.name }
+    next unless union
+    print_union(t.name, union)
+  elsif t.type.kind_of?(YAMLCAst::Pointer) && t.type.type.kind_of?(YAMLCAst::Function)
+    print_function_pointer_type(t.name, t.type.type)
+  elsif t.type.kind_of?(YAMLCAst::Pointer)
+    print_pointer_type(t.name)
+  elsif t.type.kind_of?(YAMLCAst::Int)
+    print_int_type(t.name, t.type.name)
+  else
+    #$stderr.puts t.inspect
+  end
+}
+
+puts <<EOF
+end
+EOF
diff --git a/mpi/gen_mpi_library_base.rb b/mpi/gen_mpi_library_base.rb
new file mode 100644
index 00000000..a40fb3ad
--- /dev/null
+++ b/mpi/gen_mpi_library_base.rb
@@ -0,0 +1,101 @@
+require_relative 'mpi_model'
+require_relative 'gen_probe_base.rb'
+require_relative '../utils/gen_library_base.rb'
+
+$all_types = $mpi_api["typedefs"] || []
+$all_structs = $mpi_api["structs"] || []
+$all_unions = $mpi_api["unions"] || []
+$all_enums = $mpi_api["enums"] || []
+$all_funcs = $mpi_api["functions"] || []
+
+$all_enum_names = []
+$all_bitfield_names = []
+$all_struct_names = []
+$all_union_names = []
+
+$objects = $all_types.filter_map { |t|
+  t.name if t.type.kind_of?(YAMLCAst::Pointer) && t.type.type.kind_of?(YAMLCAst::Struct)
+}
+
+$all_types.each { |t|
+  if t.type.kind_of?(YAMLCAst::CustomType) && OBJECT_TYPES.include?(t.type.name)
+    $objects.push t.name
+  end
+}
+
+$int_scalars = {}
+$all_types.each { |t|
+  if t.type.kind_of?(YAMLCAst::CustomType) && INT_TYPES.include?(t.type.name)
+    $int_scalars[t.name] = t.type.name
+  end
+}
+
+def to_snake_case(str)
+  str.gsub(/([A-Z][A-Z0-9]*)/, '_\1').downcase
+end
+
+def to_class_name(name)
+  mod = to_name_space(name)
+  mod = "" unless mod
+  n = name.gsub(/\A#{mod}/, "")
+  mod.capitalize! if mod == 'mpi'
+  res = mod << n
+  if res[0].match(/[[:lower:]]/)
+    res[0] = res[0].upcase
+  end
+  res
+end
+
+def to_scoped_class_name(name)
+  "MPI::#{to_class_name(name)}"
+end
+
+def to_ffi_name(name)
+  case name
+  when nil
+    return ":anonymous"
+  when "unsigned int"
+    return ":uint"
+  when "unsigned short", "unsigned short int"
+    return ":ushort"
+  when "unsigned char"
+    return ":uchar"
+  when "unsigned long long int"
+    return ":uint64"
+  when "size_t"
+    return ":size_t"
+  when "_Bool"
+    return ":bool"
+  end
+  name.to_sym.inspect
+end
+
+def to_name_space(name)
+  case name
+  when /\Ampi/
+    "mpi"
+  when /\AMPI/
+    "MPI"
+  else
+    nil
+  end
+end
+
+$all_types.each { |t|
+  if t.type.kind_of? YAMLCAst::Enum
+    enum = $all_enums.find { |e| t.type.name == e.name }
+    if false
+      $all_bitfield_names.push t.name
+    else
+      $all_enum_names.push t.name
+    end
+  elsif t.type.kind_of? YAMLCAst::Struct
+    $all_struct_names.push t.name
+  elsif t.type.kind_of? YAMLCAst::Union
+    $all_union_names.push t.name
+  end
+}
+
+FFI_STRUCT = 'FFI::MPIStruct'
+FFI_UNION = 'FFI::MPIUnion'
+
diff --git a/mpi/include/mpi.h b/mpi/include/mpi.h
index 01b59591..eb3ecb9b 100644
--- a/mpi/include/mpi.h
+++ b/mpi/include/mpi.h
@@ -1,2 +1,15 @@
+#ifndef MPI_H_ABI
+#define MPI_H_ABI
+
+enum {
+    MPI_SUCCESS                        =  0,
+};
+
 int MPI_Init(int *argc, char ***argv);
 int PMPI_Init(int *argc, char ***argv);
+double MPI_Wtick(void);
+double MPI_Wtime(void);
+double PMPI_Wtick(void);
+double PMPI_Wtime(void);
+
+#endif  /* MPI_H_ABI */
diff --git a/mpi/mpi.h.include b/mpi/mpi.h.include
index e69de29b..8342d6ab 100644
--- a/mpi/mpi.h.include
+++ b/mpi/mpi.h.include
@@ -0,0 +1,2 @@
+#include "modified_include/mpi.h"
+
diff --git a/mpi/mpi_events.yaml b/mpi/mpi_events.yaml
new file mode 100644
index 00000000..d9e1a256
--- /dev/null
+++ b/mpi/mpi_events.yaml
@@ -0,0 +1,2 @@
+---
+{}