/*
- dbench version 1
- Copyright (C) Andrew Tridgell 1999
+ Copyright (C) by Andrew Tridgell <tridge@samba.org> 1999-2007
+ Copyright (C) 2001 by Martin Pool <mbp@samba.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
+/* TODO: We could try allowing for different flavours of synchronous
+ operation: data sync and so on. Linux apparently doesn't make any
+ distinction, however, and for practical purposes it probably
+ doesn't matter. On NFSv4 it might be interesting, since the client
+ can choose what kind it wants for each OPEN operation. */
+
#include "dbench.h"
+#include "popt.h"
+#include <sys/sem.h>
+
+struct options options = {
+ .backend = "fileio",
+ .timelimit = 600,
+ .loadfile = DATADIR "/client.txt",
+ .directory = ".",
+ .tcp_options = TCP_OPTIONS,
+ .nprocs = 10,
+ .sync_open = 0,
+ .sync_dirs = 0,
+ .do_fsync = 0,
+ .fsync_frequency = 0,
+ .warmup = -1,
+ .targetrate = 0.0,
+ .ea_enable = 0,
+ .clients_per_process = 1,
+ .server = "localhost",
+ .export = "/tmp",
+ .protocol = "tcp",
+ .run_once = 0,
+ .allow_scsi_writes = 0,
+ .trunc_io = 0,
+};
+
+static struct timeval tv_start;
+static struct timeval tv_end;
+static int barrier=-1;
+static double throughput;
+struct nb_operations *nb_ops;
+
+static FILE *open_loadfile(void)
+{
+ FILE *f;
+
+ if ((f = fopen(options.loadfile, "rt")) != NULL)
+ return f;
+
+ fprintf(stderr,
+ "dbench: error opening '%s': %s\n", options.loadfile,
+ strerror(errno));
+
+ return NULL;
+}
+
+
+static struct child_struct *children;
+
+static void sem_cleanup() {
+ if (!(barrier==-1))
+ semctl(barrier,0,IPC_RMID);
+}
+
+static void sig_alarm(int sig)
+{
+ double total_bytes = 0;
+ int total_lines = 0;
+ int i;
+ int nclients = options.nprocs * options.clients_per_process;
+ int in_warmup = 0;
+ double t;
+ static int in_cleanup;
+ double latency;
+ struct timeval tnow;
+ int num_active = 0;
+ int num_finished = 0;
+ (void)sig;
+
+ tnow = timeval_current();
+
+ for (i=0;i<nclients;i++) {
+ total_bytes += children[i].bytes - children[i].bytes_done_warmup;
+ if (children[i].bytes == 0) {
+ in_warmup = 1;
+ } else {
+ num_active++;
+ }
+ total_lines += children[i].line;
+ if (children[i].cleanup_finished) {
+ num_finished++;
+ }
+ }
+
+ t = timeval_elapsed(&tv_start);
+
+ if (!in_warmup && options.warmup>0 && t > options.warmup) {
+ tv_start = tnow;
+ options.warmup = 0;
+ for (i=0;i<nclients;i++) {
+ children[i].bytes_done_warmup = children[i].bytes;
+ children[i].worst_latency = 0;
+ memset(&children[i].ops, 0, sizeof(children[i].ops));
+ }
+ goto next;
+ }
+ if (t < options.warmup) {
+ in_warmup = 1;
+ } else if (!in_warmup && !in_cleanup && t > options.timelimit) {
+ for (i=0;i<nclients;i++) {
+ children[i].done = 1;
+ }
+ tv_end = tnow;
+ in_cleanup = 1;
+ }
+ if (t < 1) {
+ goto next;
+ }
+
+ latency = 0;
+ if (!in_cleanup) {
+ for (i=0;i<nclients;i++) {
+ latency = MAX(children[i].max_latency, latency);
+ latency = MAX(latency, timeval_elapsed2(&children[i].lasttime, &tnow));
+ children[i].max_latency = 0;
+ if (latency > children[i].worst_latency) {
+ children[i].worst_latency = latency;
+ }
+ }
+ }
+
+ if (in_warmup) {
+ printf("%4d %8d %7.2f MB/sec warmup %3.0f sec latency %.03f ms\n",
+ num_active, total_lines/nclients,
+ 1.0e-6 * total_bytes / t, t, latency*1000);
+ } else if (in_cleanup) {
+ printf("%4d cleanup %3.0f sec\n", nclients - num_finished, t);
+ } else {
+ printf("%4d %8d %7.2f MB/sec execute %3.0f sec latency %.03f ms\n",
+ nclients, total_lines/nclients,
+ 1.0e-6 * total_bytes / t, t, latency*1000);
+ throughput = 1.0e-6 * total_bytes / t;
+ }
+
+ fflush(stdout);
+next:
+ signal(SIGALRM, sig_alarm);
+ alarm(PRINT_FREQ);
+}
+
+
+static void show_one_latency(struct op *ops, struct op *ops_all)
+{
+ int i;
+ printf(" Operation Count AvgLat MaxLat\n");
+ printf(" --------------------------------------------------\n");
+ for (i=0;nb_ops->ops[i].name;i++) {
+ struct op *op1, *op_all;
+ op1 = &ops[i];
+ op_all = &ops_all[i];
+ if (op_all->count == 0) continue;
+ printf(" %-22s %7u %9.03f %9.03f\n",
+ nb_ops->ops[i].name, op1->count,
+ 1000*op1->total_time/op1->count,
+ op1->max_latency*1000);
+ }
+ printf("\n");
+}
-static void sigusr1(void)
+static void report_latencies(void)
{
+ struct op sum[MAX_OPS];
+ int i, j;
+ struct op *op1, *op2;
+ struct child_struct *child;
+
+ memset(sum, 0, sizeof(sum));
+ for (i=0;nb_ops->ops[i].name;i++) {
+ op1 = &sum[i];
+ for (j=0;j<options.nprocs * options.clients_per_process;j++) {
+ child = &children[j];
+ op2 = &child->ops[i];
+ op1->count += op2->count;
+ op1->total_time += op2->total_time;
+ op1->max_latency = MAX(op1->max_latency, op2->max_latency);
+ }
+ }
+ show_one_latency(sum, sum);
+
+ if (!options.per_client_results) {
+ return;
+ }
+
+ printf("Per client results:\n");
+ for (i=0;i<options.nprocs * options.clients_per_process;i++) {
+ child = &children[i];
+ printf("Client %u did %u lines and %.0f bytes\n",
+ i, child->line, child->bytes - child->bytes_done_warmup);
+ show_one_latency(child->ops, sum);
+ }
}
-/* this creates the specified number of child processes and runs fn() in all of them */
-static double create_procs(int nprocs, void (*fn)(int ))
+/* this creates the specified number of child processes and runs fn()
+ in all of them */
+static void create_procs(int nprocs, void (*fn)(struct child_struct *, const char *))
{
+ int nclients = nprocs * options.clients_per_process;
int i, status;
- volatile int *child_status;
int synccount;
+ struct timeval tv;
+ FILE *load;
+ struct sembuf sbuf;
+ double t;
- signal(SIGUSR1, sigusr1);
-
- start_timer();
+ load = open_loadfile();
+ if (load == NULL) {
+ exit(1);
+ }
- synccount = 0;
+ if (nprocs < 1) {
+ fprintf(stderr,
+ "create %d procs? you must be kidding.\n",
+ nprocs);
+ return;
+ }
- child_status = (volatile int *)shm_setup(sizeof(int)*nprocs);
- if (!child_status) {
+ children = shm_setup(sizeof(struct child_struct)*nclients);
+ if (!children) {
printf("Failed to setup shared memory\n");
- return end_timer();
+ return;
}
- memset((void *)child_status, 0, sizeof(int)*nprocs);
+ memset(children, 0, sizeof(*children)*nclients);
+
+ for (i=0;i<nclients;i++) {
+ children[i].id = i;
+ children[i].cleanup = 0;
+ children[i].directory = options.directory;
+ children[i].starttime = timeval_current();
+ children[i].lasttime = timeval_current();
+ }
+
+ if (atexit(sem_cleanup) != 0) {
+ printf("can't register cleanup function on exit\n");
+ exit(1);
+ }
+ sbuf.sem_num = 0;
+ if ( !(barrier = semget(IPC_PRIVATE,1,IPC_CREAT | S_IRUSR | S_IWUSR)) ) {
+ printf("failed to create barrier semaphore \n");
+ }
+ sbuf.sem_flg = SEM_UNDO;
+ sbuf.sem_op = 1;
+ if (semop(barrier, &sbuf, 1) == -1) {
+ printf("failed to initialize the barrier semaphore\n");
+ exit(1);
+ }
+ sbuf.sem_flg = 0;
for (i=0;i<nprocs;i++) {
if (fork() == 0) {
- setbuffer(stdout, NULL, 0);
- nb_setup(i);
- child_status[i] = getpid();
- pause();
- fn(i);
+ int j;
+
+ setlinebuf(stdout);
+ srandom(getpid() ^ time(NULL));
+
+ for (j=0;j<options.clients_per_process;j++) {
+ nb_ops->setup(&children[i*options.clients_per_process + j]);
+ }
+
+ sbuf.sem_op = 0;
+ if (semop(barrier, &sbuf, 1) == -1) {
+ printf("failed to use the barrier semaphore in child %d\n",getpid());
+ exit(1);
+ }
+
+ semctl(barrier,0,IPC_RMID);
+
+ fn(&children[i*options.clients_per_process], options.loadfile);
_exit(0);
}
}
+ synccount = 0;
+ tv = timeval_current();
do {
- synccount = 0;
- for (i=0;i<nprocs;i++) {
- if (child_status[i]) synccount++;
- }
+ synccount = semctl(barrier,0,GETZCNT);
+ t = timeval_elapsed(&tv);
+ printf("%d of %d processes prepared for launch %3.0f sec\n", synccount, nprocs, t);
if (synccount == nprocs) break;
- sleep(1);
- } while (end_timer() < 30);
+ usleep(100*1000);
+ } while (timeval_elapsed(&tv) < 30);
if (synccount != nprocs) {
printf("FAILED TO START %d CLIENTS (started %d)\n", nprocs, synccount);
- return end_timer();
+ return;
}
- start_timer();
- kill(0, SIGUSR1);
+ printf("releasing clients\n");
+ tv_start = timeval_current();
+ sbuf.sem_op = -1;
+ if (semop(barrier, &sbuf, 1) == -1) {
+ printf("failed to release barrier\n");
+ exit(1);
+ }
- printf("%d clients started\n", nprocs);
+ semctl(barrier,0,IPC_RMID);
- for (i=0;i<nprocs;i++) {
- waitpid(0, &status, 0);
- printf("*");
+ signal(SIGALRM, sig_alarm);
+ alarm(PRINT_FREQ);
+
+ for (i=0;i<nprocs;) {
+ if (waitpid(0, &status, 0) == -1) continue;
+ if (WEXITSTATUS(status) != 0) {
+ printf("Child failed with status %d\n",
+ WEXITSTATUS(status));
+ exit(1);
+ }
+ i++;
}
+
+ alarm(0);
+ sig_alarm(SIGALRM);
+
printf("\n");
- return end_timer();
+
+ report_latencies();
}
+static void process_opts(int argc, const char **argv)
+{
+ const char **extra_argv;
+ int extra_argc = 0;
+ struct poptOption popt_options[] = {
+ POPT_AUTOHELP
+ { "backend", 'B', POPT_ARG_STRING, &options.backend, 0,
+ "dbench backend (fileio, sockio, nfs)", "string" },
+ { "timelimit", 't', POPT_ARG_INT, &options.timelimit, 0,
+ "timelimit", "integer" },
+ { "loadfile", 'c', POPT_ARG_STRING, &options.loadfile, 0,
+ "loadfile", "filename" },
+ { "directory", 'D', POPT_ARG_STRING, &options.directory, 0,
+ "working directory", NULL },
+ { "tcp-options", 'T', POPT_ARG_STRING, &options.tcp_options, 0,
+ "TCP socket options", NULL },
+ { "target-rate", 'R', POPT_ARG_DOUBLE, &options.targetrate, 0,
+ "target throughput (MB/sec)", NULL },
+ { "sync", 's', POPT_ARG_NONE, &options.sync_open, 0,
+ "use O_SYNC", NULL },
+ { "sync-dir", 'S', POPT_ARG_NONE, &options.sync_dirs, 0,
+ "sync directory changes", NULL },
+ { "fsync", 'F', POPT_ARG_NONE, &options.do_fsync, 0,
+ "fsync on write", NULL },
+ { "xattr", 'x', POPT_ARG_NONE, &options.ea_enable, 0,
+ "use xattrs", NULL },
+ { "no-resolve", 0, POPT_ARG_NONE, &options.no_resolve, 0,
+ "disable name resolution simulation", NULL },
+ { "clients-per-process", 0, POPT_ARG_INT, &options.clients_per_process, 0,
+ "number of clients per process", NULL },
+ { "trunc-io", 0, POPT_ARG_INT, &options.trunc_io, 0,
+ "truncate all io to this size", NULL },
+ { "one-byte-write-fix", 0, POPT_ARG_NONE, &options.one_byte_write_fix, 0,
+ "try to fix 1 byte writes", NULL },
+ { "stat-check", 0, POPT_ARG_NONE, &options.stat_check, 0,
+ "check for pointless calls with stat", NULL },
+ { "fake-io", 0, POPT_ARG_NONE, &options.fake_io, 0,
+ "fake up read/write calls", NULL },
+ { "skip-cleanup", 0, POPT_ARG_NONE, &options.skip_cleanup, 0,
+ "skip cleanup operations", NULL },
+ { "per-client-results", 0, POPT_ARG_NONE, &options.per_client_results, 0,
+ "show results per client", NULL },
+ { "server", 0, POPT_ARG_STRING, &options.server, 0,
+ "server", NULL },
+ { "export", 0, POPT_ARG_STRING, &options.export, 0,
+ "export", NULL },
+ { "protocol", 0, POPT_ARG_STRING, &options.protocol, 0,
+ "protocol", NULL },
+ { "run-once", 0, POPT_ARG_NONE, &options.run_once, 0,
+ "Stop once reaching the end of the loadfile", NULL},
+ { "scsi", 0, POPT_ARG_STRING, &options.scsi_dev, 0,
+ "scsi device", NULL },
+ { "allow-scsi-writes", 0, POPT_ARG_NONE, &options.allow_scsi_writes, 0,
+ "Allow SCSI write command to the device", NULL},
+ { "warmup", 0, POPT_ARG_INT, &options.warmup, 0,
+ "How meny seconds of warmup to run", NULL },
+ POPT_TABLEEND
+ };
+ poptContext pc;
+ int opt;
+
+ pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ if (strcmp(poptBadOption(pc, 0), "-h") == 0) {
+ poptPrintHelp(pc, stdout, 0);
+ exit(1);
+ }
+ fprintf(stderr, "Invalid option %s: %s\n",
+ poptBadOption(pc, 0), poptStrerror(opt));
+ exit(1);
+ }
+
+ /* setup the remaining options for the main program to use */
+ extra_argv = poptGetArgs(pc);
+ if (extra_argv) {
+ extra_argv++;
+ while (extra_argv[extra_argc]) extra_argc++;
+ }
+
+ if (extra_argc < 1) {
+ printf("You need to specify NPROCS\n");
+ poptPrintHelp(pc, stdout, 0);
+ exit(1);
+ }
+
+#ifndef HAVE_EA_SUPPORT
+ if (options.ea_enable) {
+ printf("EA suppport not compiled in\n");
+ exit(1);
+ }
+#endif
+
+ options.nprocs = atoi(extra_argv[0]);
+
+ if (extra_argc >= 2) {
+ options.server = extra_argv[1];
+ }
+}
+
+
- int main(int argc, char *argv[])
+ int main(int argc, const char *argv[])
{
- extern char *server;
- int nprocs;
- double t;
+ double total_bytes = 0;
+ double t, latency=0;
+ int i;
+
+ setlinebuf(stdout);
+
+ printf("dbench version %s - Copyright Andrew Tridgell 1999-2004\n\n", VERSION);
- if (argc < 2) {
- printf("usage: dbench nprocs\n");
+ if (strstr(argv[0], "dbench")) {
+ options.backend = "fileio";
+ } else if (strstr(argv[0], "tbench")) {
+ options.backend = "sockio";
+ } else if (strstr(argv[0], "nfsbench")) {
+ options.backend = "nfs";
+ } else if (strstr(argv[0], "scsibench")) {
+ options.backend = "scsi";
+ }
+
+ process_opts(argc, argv);
+
+ if (strcmp(options.backend, "fileio") == 0) {
+ extern struct nb_operations fileio_ops;
+ nb_ops = &fileio_ops;
+ } else if (strcmp(options.backend, "sockio") == 0) {
+ extern struct nb_operations sockio_ops;
+ nb_ops = &sockio_ops;
+ } else if (strcmp(options.backend, "nfs") == 0) {
+ extern struct nb_operations nfs_ops;
+ nb_ops = &nfs_ops;
+#ifdef HAVE_LINUX_SCSI_SG
+ } else if (strcmp(options.backend, "scsi") == 0) {
+ extern struct nb_operations scsi_ops;
+ nb_ops = &scsi_ops;
+#endif /* HAVE_LINUX_SCSI_SG */
+ } else {
+ printf("Unknown backend '%s'\n", options.backend);
exit(1);
}
- nprocs = atoi(argv[1]);
+ if (options.warmup == -1) {
+ options.warmup = options.timelimit / 5;
+ }
+
+ printf("Running for %d seconds with load '%s' and minimum warmup %d secs\n",
+ options.timelimit, options.loadfile, options.warmup);
+
+ create_procs(options.nprocs, child_run);
- if (argc > 2) {
- server = argv[2];
+ for (i=0;i<options.nprocs*options.clients_per_process;i++) {
+ total_bytes += children[i].bytes - children[i].bytes_done_warmup;
+ latency = MAX(latency, children[i].worst_latency);
}
- t = create_procs(nprocs, child_run);
+ t = timeval_elapsed2(&tv_start, &tv_end);
- /* to produce a netbench result we scale accoding to the
- netbench measured throughput for the run that produced the
- sniff that was used to produce client.txt. That run used 2
- clients and ran for 660 seconds to produce a result of
- 4MBit/sec. */
- printf("Throughput %g MB/sec (NB=%g MB/sec %g MBit/sec)\n",
- 132*nprocs/t, 0.5*0.5*nprocs*660/t, 2*nprocs*660/t);
+ printf("Throughput %g MB/sec%s%s %d clients %d procs max_latency=%.03f ms\n",
+ throughput,
+ options.sync_open ? " (sync open)" : "",
+ options.sync_dirs ? " (sync dirs)" : "",
+ options.nprocs*options.clients_per_process,
+ options.nprocs, latency*1000);
return 0;
}
git.samba.org / tridge / dbench.git / blobdiff