Date: Wed, 3 Feb 2010 10:51:03 GMT From: Robert Watson <rwatson@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 174220 for review Message-ID: <201002031051.o13Ap3o6033398@repoman.freebsd.org>
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http://p4web.freebsd.org/chv.cgi?CH=174220 Change 174220 by rwatson@rwatson_vimage_client on 2010/02/03 10:50:29 Benchmark various fork variations with exec of /usr/bin/true. Affected files ... .. //depot/projects/trustedbsd/capabilities/src/tools/tools/syscall_timing/syscall_timing.c#8 edit Differences ... ==== //depot/projects/trustedbsd/capabilities/src/tools/tools/syscall_timing/syscall_timing.c#8 (text+ko) ==== @@ -455,6 +455,116 @@ benchmark_stop(); } +#define USR_BIN_TRUE "/usr/bin/true" +static char *execve_args[] = { USR_BIN_TRUE, NULL}; +extern char **environ; + +void +test_fork_exec(int num) +{ + pid_t pid; + int i; + + pid = fork(); + if (pid < 0) + err(-1, "test_fork: fork"); + if (pid == 0) { + (void)execve(USR_BIN_TRUE, execve_args, environ); + err(-1, "execve"); + } + if (waitpid(pid, NULL, 0) < 0) + err(-1, "test_fork: waitpid"); + benchmark_start(); + for (i = 0; i < num; i++) { + pid = fork(); + if (pid < 0) + err(-1, "test_fork: fork"); + if (pid == 0) { + (void)execve(USR_BIN_TRUE, execve_args, environ); + err(-1, "execve"); + } + if (waitpid(pid, NULL, 0) < 0) + err(-1, "test_fork: waitpid"); + } + benchmark_stop(); +} + +void +test_vfork_exec(int num) +{ + pid_t pid; + int i; + + pid = vfork(); + if (pid < 0) + err(-1, "test_vfork: vfork"); + if (pid == 0) { + (void)execve(USR_BIN_TRUE, execve_args, environ); + err(-1, "execve"); + } + if (waitpid(pid, NULL, 0) < 0) + err(-1, "test_vfork: waitpid"); + benchmark_start(); + for (i = 0; i < num; i++) { + pid = vfork(); + if (pid < 0) + err(-1, "test_vfork: vfork"); + if (pid == 0) { + (void)execve(USR_BIN_TRUE, execve_args, environ); + err(-1, "execve"); + } + if (waitpid(pid, NULL, 0) < 0) + err(-1, "test_vfork: waitpid"); + } + benchmark_stop(); +} + +void +test_pdfork_exec(int num) +{ + struct pollfd pollfd; + pid_t pid; + int fd, i, n; + + pid = pdfork(&fd); + if (pid < 0) + err(-1, "test_pdfork: pdfork"); + if (pid == 0) { + (void)execve(USR_BIN_TRUE, execve_args, environ); + err(-1, "execve"); + } + pollfd.fd = fd; + pollfd.events = POLLHUP; + pollfd.revents = 0; + n = poll(&pollfd, 1, INFTIM); + if (n < 0) + err(-1, "poll"); + if (n != 1) + errx(-1, "poll returned %d", n); + close(fd); + + benchmark_start(); + for (i = 0; i < num; i++) { + pid = pdfork(&fd); + if (pid < 0) + err(-1, "test_pdfork: pdfork"); + if (pid == 0) { + (void)execve(USR_BIN_TRUE, execve_args, environ); + err(-1, "execve"); + } + pollfd.fd = fd; + pollfd.events = POLLHUP; + pollfd.revents = 0; + n = poll(&pollfd, 1, INFTIM); + if (n < 0) + err(-1, "poll"); + if (n != 1) + errx(-1, "poll returned %d", n); + close(fd); + } + benchmark_stop(); +} + #define MYNAME "./syscall_timing" /* Binary to run in sandbox. */ /* @@ -572,6 +682,9 @@ { "fork", test_fork }, { "vfork", test_vfork }, { "pdfork", test_pdfork }, + { "fork_exec", test_fork_exec }, + { "vfork_exec", test_vfork_exec }, + { "pdfork_exec", test_pdfork_exec }, { "sandbox", test_sandbox }, }; static const int tests_count = sizeof(tests) / sizeof(tests[0]);
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