Date: Wed, 4 Jul 2018 14:20:19 +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: r335956 - head/tools/tools/syscall_timing Message-ID: <201807041420.w64EKJQu029715@repo.freebsd.org>
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Author: trasz Date: Wed Jul 4 14:20:19 2018 New Revision: 335956 URL: https://svnweb.freebsd.org/changeset/base/335956 Log: Add a semaphore ping 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 14:18:12 2018 (r335955) +++ head/tools/tools/syscall_timing/syscall_timing.c Wed Jul 4 14:20:19 2018 (r335956) @@ -29,6 +29,7 @@ * $FreeBSD$ */ +#include <sys/param.h> #include <sys/types.h> #include <sys/mman.h> #include <sys/procdesc.h> @@ -47,6 +48,7 @@ #ifdef WITH_PTHREAD #include <pthread.h> #endif +#include <semaphore.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> @@ -606,6 +608,65 @@ test_select(uintmax_t num, uintmax_t int_arg __unused, } static uintmax_t +test_semaping(uintmax_t num, uintmax_t int_arg __unused, const char *path __unused) +{ + uintmax_t i; + pid_t pid; + sem_t *buf; + int error, j, procfd; + + buf = mmap(0, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, -1, 0); + if (buf == MAP_FAILED) + err(1, "mmap"); + + for (j = 0; j < 2; j++) { + error = sem_init(&buf[j], 1, 0); + if (error != 0) + err(1, "sem_init"); + } + + pid = pdfork(&procfd, 0); + if (pid < 0) + err(1, "pdfork"); + + if (pid == 0) { + for (;;) { + error = sem_wait(&buf[0]); + if (error != 0) + err(1, "sem_wait"); + error = sem_post(&buf[1]); + if (error != 0) + err(1, "sem_post"); + } + } + + benchmark_start(); + BENCHMARK_FOREACH(i, num) { + error = sem_post(&buf[0]); + if (error != 0) + err(1, "sem_post"); + error = sem_wait(&buf[1]); + if (error != 0) + err(1, "sem_wait"); + } + benchmark_stop(); + + close(procfd); + + for (j = 0; j < 2; j++) { + error = sem_destroy(&buf[j]); + if (error != 0) + err(1, "sem_destroy"); + } + + error = munmap(buf, PAGE_SIZE); + if (error != 0) + err(1, "munmap"); + + return (i); +} + +static uintmax_t test_setuid(uintmax_t num, uintmax_t int_arg __unused, const char *path __unused) { uid_t uid; @@ -900,6 +961,7 @@ static const struct test tests[] = { { "read_100000", test_read, .t_flags = FLAG_PATH, .t_int = 100000 }, { "read_1000000", test_read, .t_flags = FLAG_PATH, .t_int = 1000000 }, { "select", test_select, .t_flags = 0 }, + { "semaping", test_semaping, .t_flags = 0 }, { "setuid", test_setuid, .t_flags = 0 }, { "shmfd", test_shmfd, .t_flags = 0 }, { "shmfd_dup", test_shmfd_dup, .t_flags = 0 },
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