diff options
| -rw-r--r-- | ChangeLog | 11 | ||||
| -rw-r--r-- | process.c | 8 |
2 files changed, 19 insertions, 0 deletions
@@ -1,3 +1,14 @@ +Wed Sep 3 12:05:17 2014 Tanaka Akira <akr@fsij.org> + + * process.c (retry_fork_async_signal_safe): Use vfork() if available. + vfork() is still faster than fork() especially when the parent + process uses big memory. + + ruby -rbenchmark -e 'a = "a" * 1_000_000_000; puts Benchmark.measure { system("true") }' + fork: 0.000000 0.010000 0.010000 ( 0.014968) + vfork: 0.000000 0.000000 0.000000 ( 0.000912) + on Debian sid. + Wed Sep 3 11:33:08 2014 SHIBATA Hiroshi <shibata.hiroshi@gmail.com> * test/openssl/test_pkey_rsa.rb (OpenSSL#test_sign_verify_memory_leak): @@ -50,6 +50,9 @@ #ifdef HAVE_SYS_RESOURCE_H # include <sys/resource.h> #endif +#ifdef HAVE_VFORK_H +# include <vfork.h> +#endif #ifdef HAVE_SYS_PARAM_H # include <sys/param.h> #endif @@ -3291,7 +3294,11 @@ retry_fork_async_signal_safe(int *status, int *ep, while (1) { prefork(); +#ifdef HAVE_WORKING_VFORK + pid = vfork(); +#else pid = fork(); +#endif if (pid == 0) {/* fork succeed, child process */ int ret; forked_child = 1; @@ -3305,6 +3312,7 @@ retry_fork_async_signal_safe(int *status, int *ep, _exit(127); #endif } + forked_child = 0; /* for vfork(). */ if (0 < pid) /* fork succeed, parent process */ return pid; /* fork failed */ |