Date: Wed, 4 Jul 2018 13:34:43 +0000 (UTC) From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r335941 - head/tools/tools/syscall_timing Message-ID: <201807041334.w64DYhQu007746@repo.freebsd.org>
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Author: trasz Date: Wed Jul 4 13:34:43 2018 New Revision: 335941 URL: https://svnweb.freebsd.org/changeset/base/335941 Log: Add a trivial "pipe ping" (two processes) benchmark. Obtained from: CheriBSD MFC after: 2 weeks Sponsored by: DARPA, AFRL Modified: head/tools/tools/syscall_timing/syscall_timing.c Modified: head/tools/tools/syscall_timing/syscall_timing.c ============================================================================== --- head/tools/tools/syscall_timing/syscall_timing.c Wed Jul 4 13:31:55 2018 (r335940) +++ head/tools/tools/syscall_timing/syscall_timing.c Wed Jul 4 13:34:43 2018 (r335941) @@ -31,6 +31,7 @@ #include <sys/types.h> #include <sys/mman.h> +#include <sys/procdesc.h> #include <sys/resource.h> #include <sys/socket.h> #include <sys/stat.h> @@ -251,6 +252,52 @@ test_select(uintmax_t num, uintmax_t int_arg __unused, } static uintmax_t +test_pipeping(uintmax_t num, uintmax_t int_arg, const char *path __unused) +{ + char buf[int_arg]; + uintmax_t i; + ssize_t ret; + pid_t pid; + int fd[2], procfd; + + if (pipe(fd) < 0) + err(-1, "pipe"); + + pid = pdfork(&procfd, 0); + if (pid < 0) + err(1, "pdfork"); + + if (pid == 0) { + close(fd[0]); + + for (;;) { + ret = read(fd[1], buf, int_arg); + if ((uintmax_t)ret != int_arg) + err(1, "read"); + ret = write(fd[1], buf, int_arg); + if ((uintmax_t)ret != int_arg) + err(1, "write"); + } + } + + close(fd[1]); + + benchmark_start(); + BENCHMARK_FOREACH(i, num) { + ret = write(fd[0], buf, int_arg); + if ((uintmax_t)ret != int_arg) + err(1, "write"); + ret = read(fd[0], buf, int_arg); + if ((uintmax_t)ret != int_arg) + err(1, "read"); + } + benchmark_stop(); + + close(procfd); + return (i); +} + +static uintmax_t test_socket_stream(uintmax_t num, uintmax_t int_arg, const char *path __unused) { uintmax_t i; @@ -694,6 +741,18 @@ static const struct test tests[] = { { "getppid", test_getppid, .t_flags = 0 }, { "getresuid", test_getresuid, .t_flags = 0 }, { "clock_gettime", test_clock_gettime, .t_flags = 0 }, + { "pipeping_1", test_pipeping, .t_flags = 0, .t_int = 1 }, + { "pipeping_10", test_pipeping, .t_flags = 0, .t_int = 10 }, + { "pipeping_100", test_pipeping, .t_flags = 0, .t_int = 100 }, + { "pipeping_1000", test_pipeping, .t_flags = 0, .t_int = 1000 }, + { "pipeping_10000", test_pipeping, .t_flags = 0, .t_int = 10000 }, +#ifdef notyet + /* + * XXX: Doesn't work; kernel pipe buffer too small? + */ + { "pipeping_100000", test_pipeping, .t_flags = 0, .t_int = 100000 }, + { "pipeping_1000000", test_pipeping, .t_flags = 0, .t_int = 1000000 }, + #endif { "gettimeofday", test_gettimeofday, .t_flags = 0 }, { "getpriority", test_getpriority, .t_flags = 0 }, { "getprogname", test_getprogname, .t_flags = 0 },
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