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| author | Lukas Larsson <[email protected]> | 2015-07-06 17:13:52 +0200 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2015-12-15 10:05:44 +0100 |
| commit | 14c7fefd51be035a44bfe42127fb4b9df92d760b (patch) | |
| tree | 05efafe42ac32a0bf25d4c57e5778fb0b8c9990e /erts/emulator/Makefile.in | |
| parent | 6089f3c961a981b6bacb6c1590386bb67905ff23 (diff) | |
| download | otp-14c7fefd51be035a44bfe42127fb4b9df92d760b.tar.gz otp-14c7fefd51be035a44bfe42127fb4b9df92d760b.tar.bz2 otp-14c7fefd51be035a44bfe42127fb4b9df92d760b.zip | |
erts: Create forker process for spawn driver
Instead of forking from the beam process, we create a separate
process in which all forks are done. This has several advantages:
1) performance:
* don't have to close all fd's in the world
* fork only has to copy stuff from a small process
* work is done in a completely seperate process
* a 3x performance increase has been measured,
can be made even greater (10x) if we cache the
environment in child setup
2) stability
* the exec is done in another process than beam, which means that
if the file that we exec to is on an nfs that is not available
right now we will not block a scheduler until the nfs returns.
3) simplicity
* don't have to deal with SIGCHLD in the erts
Unfortunately, this solution also implies some badness.
1) There will always be a seperate process running together with
beam on unix. This could be confusing and undesirable.
2) We have to transfer the entire environment to child_setup
for each command.
OTP-13088
Diffstat (limited to 'erts/emulator/Makefile.in')
| -rw-r--r-- | erts/emulator/Makefile.in | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in index 69f28b0c10..ab415b66b4 100644 --- a/erts/emulator/Makefile.in +++ b/erts/emulator/Makefile.in @@ -317,7 +317,7 @@ else CS_CFLAGS = $(CS_CFLAGS_) endif CS_LDFLAGS = $(LDFLAGS) -CS_LIBS = -L../lib/internal/$(TARGET) -lerts_internal$(TYPEMARKER) @ERTS_INTERNAL_X_LIBS@ +CS_LIBS = -L../lib/internal/$(TARGET) -lerts_internal$(TYPEMARKER) @ERTS_INTERNAL_X_LIBS@ @SOCKET_LIBS@ LIBS += @TERMCAP_LIB@ -L../lib/internal/$(TARGET) @ERTS_INTERNAL_X_LIBS@ @@ -690,11 +690,11 @@ $(OBJDIR)/%.o: drivers/$(ERLANG_OSTYPE)/%.c # ---------------------------------------------------------------------- # Specials # -CS_SRC = sys/$(ERLANG_OSTYPE)/erl_child_setup.c +CS_OBJ = $(OBJDIR)/erl_child_setup.o $(OBJDIR)/sys_uds.o -$(BINDIR)/$(CS_EXECUTABLE): $(TTF_DIR)/GENERATED $(PRELOAD_SRC) $(CS_SRC) $(ERTS_LIB) - $(ld_verbose)$(CS_PURIFY) $(CC) $(CS_LDFLAGS) -o $(BINDIR)/$(CS_EXECUTABLE) \ - $(CS_CFLAGS) $(COMMON_INCLUDES) $(CS_SRC) $(CS_LIBS) +$(BINDIR)/$(CS_EXECUTABLE): $(TTF_DIR)/GENERATED $(PRELOAD_SRC) $(CS_OBJ) $(ERTS_LIB) + $(ld_verbose)$(CS_PURIFY) $(LD) $(CS_LDFLAGS) -o $(BINDIR)/$(CS_EXECUTABLE) \ + $(CS_CFLAGS) $(COMMON_INCLUDES) $(CS_OBJ) $(CS_LIBS) $(OBJDIR)/%.kp.o: sys/common/%.c $(V_CC) -DERTS_KERNEL_POLL_VERSION $(subst -O2, $(GEN_OPT_FLGS), $(CFLAGS)) $(INCLUDES) -c $< -o $@ @@ -799,6 +799,7 @@ else OS_OBJS = \ $(OBJDIR)/sys.o \ $(OBJDIR)/sys_drivers.o \ + $(OBJDIR)/sys_uds.o \ $(OBJDIR)/driver_tab.o \ $(OBJDIR)/unix_efile.o \ $(OBJDIR)/gzio.o \ |