--- /dev/null
+.\" -*- nroff -*-
+.de IQ
+. br
+. ns
+. IP "\\$1"
+..
+.TH ovs\-benchmark 1 "July 2011" "Open vSwitch" "Open vSwitch Manual"
+.
+.SH NAME
+ovs\-benchmark \- flow setup benchmark utility for Open vSwitch
+.
+.SH SYNOPSIS
+.
+.SY ovs\-benchmark\ latency
+\fB\-\-remote \fIip\fR[\fB:\fIports\fR]
+.OP \-\-sockets nsocks
+.OP \-\-batches nbatches
+.OP \-\-local \fR[\fIip\fR][\fB:\fIports\fR]
+.YS
+.
+.SY ovs\-benchmark\ rate
+\fB\-\-remote \fIip\fR[\fB:\fIports\fR]
+.OP \-\-max\-rate rate
+.OP \-\-timeout maxsecs
+.OP \-\-sockets nsocks
+.OP \-\-batches nbatches
+.OP \-\-local \fR[\fIip\fR][\fB:\fIports\fR]
+.YS
+.
+.SY ovs\-benchmark\ listen
+.OP \-\-local \fR[\fIip\fR]\fB:\fIports
+.YS
+.
+.SY ovs\-benchmark\ help
+.YS
+.
+.SH DESCRIPTION
+\fBovs\-benchmark\fR tests the performance of Open vSwitch flow setup
+by setting up a number of TCP connections and measuring the time
+required. It can also be used with the Linux bridge or without any
+bridging software, which allows one to measure the bandwidth and
+latency cost of bridging.
+.PP
+Each \fBovs\-benchmark\fR command is described separately below.
+.
+.SH "The ``latency'' command"
+.
+.PP
+This command initiates \fInsocks\fR TCP connections (by default, 100)
+as quickly as possible, waits for each one to complete with success or
+failure, and prints a bar chart of completion times on standard
+output, followed by a summary line. Each line in the bar chart lists
+a time to connection completion in milliseconds followed by a number
+of \fB.\fR or \fB!\fR symbols, one for each TCP connection that
+completed in that many milliseconds. A successful connection prints a
+\fB.\fR, and an unsuccessful connection (e.g. to a port on which no
+process is listening) prints a \fB!\fR.
+.
+.PP
+If \fInbatches\fR is given, the entire procedure is repeated the
+specified number of times. Only a single summary line is printed at
+the end.
+.
+.PP
+Results vary widely based on the number of sockets and whether the
+remote host is listening for connections on the specified ports. With
+a small number of sockets, all connection times typically remain
+within a handful of milliseconds. As the number of sockets increases,
+the distribution of connection times clusters around the sending TCP
+stack's SYN retransmission interval. (This pattern occurs with or
+without Open vSwitch on the network path.)
+.
+.SH "The ``rate'' command"
+.
+.PP
+This command initiates \fInsocks\fR TCP connections (by default, 100)
+as quickly as possible (limited by \fImaxrate\fR, if
+\fB\-\-max\-rate\fR is specified). Each time a connection completes
+with success or failure, it closes that connection and initiates a new
+one. It continues to do so either forever or, if \fB\-\-timeout\fR is
+specified, until \fImaxsecs\fR seconds have elapsed. During the test,
+it prints statistics about time elapsed, successful and unsuccessful
+connections, and the average number of completed (succeeded or failed)
+connections per second over the run.
+.
+.PP
+Without \fB\-\-max\-rate\fR, the \fBrate\fR command measures the
+maximum sustained flow setup rate for an Open vSwitch instance. This
+naturally tends to drive \fBovs\-vswitchd\fR CPU usage to 100% on the
+host receiving the traffic.
+.
+.PP
+When \fB\-\-max\-rate\fR is specified with a value below the maximum
+rate that an Open vSwitch instance can handle, then \fBrate\fR can
+also be used to measure the kernel and userspace CPU cost of flow
+setups at specific flow rates.
+.
+.PP
+Results tend to fluctuate greatly for the first few seconds of a run,
+then settle down. The displayed average is calculated over the entire
+run and so tends to converge asymptotically on the ``correct'' value.
+To converge more quickly, try running for 5 to 10 seconds, then
+killing and restarting the run.
+.
+.SH "The ``listen'' command"
+.
+.PP
+This command listens on one or more TCP ports for incoming
+connections. It accepts connections and immediately closes them. It
+can be paired with the \fBrate\fR or \fBlatency\fR commands for
+observing effects of successful vs. unsuccessful TCP connections.
+.
+.PP
+It is easier to reproduce and interpret \fBovs\-benchmark\fR results
+when there is no listener (see \fBNOTES\fR below).
+.
+.SH "The ``help'' command"
+.
+.PP
+Prints a usage message and exits successfully.
+.
+.SH OPTIONS
+.
+.IP "\fB\-r \fIip\fR[\fB:\fIports\fR]"
+.IQ "\fB\-\-remote \fIip\fR[\fB:\fIports\fR]"
+This option, required on \fBlatency\fR and \fBrate\fR commands,
+minimally specifies the remote host to connect to (as an IP address or
+DNS name) as \fIip\fR.
+.
+.IP
+A TCP port or range of ports (separated by \fB\-\fR) may also be
+specified. If a range is specified then each port in the range is
+used in round-robin order. The default port is 6630 if none is
+specified.
+.
+.IP "\fB\-l \fR[\fIip\fR][\fB:\fIports\fR]"
+.IQ "\fB\-\-local \fR[\fIip\fR][\fB:\fIports\fR]"
+On the \fBlatency\fR and \fBrate\fR, without this option, outgoing
+connections will not bind a specific TCP port. The local TCP stack
+will pick a local TCP port to bind. When this option is specified,
+the specified port or range of ports will be used in turn. (If a port
+range is specified on both \fB\-\-local\fR and \fB\-\-remote\fR, then
+each local port in its range will be used before the remote port is
+incremented to the next port in its range.)
+.
+.IP
+On the \fBlisten\fR command, this option specifies the local port or
+ports and IP addresses on which to listen. If it is omitted, port
+6630 on any IP address is used.
+.
+.IP "\fB\-s \fInsocks\fR"
+.IQ "\fB\-\-sockets \fInsocks\fR"
+For \fBlatency\fR, sets the number of connections to initiate per
+batch. For \fBrate\fR, sets the number of outstanding connections
+attempts to maintain at any given time. The default is 100.
+.
+.IP "\fB\-b \fInbatches\fR"
+.IQ "\fB\-\-batches \fInbatches\fR"
+For \fBlatency\fR, sets the number of times to initiate and wait for
+all of the connections to complete. The default is 1.
+.
+.IP "\fB\-c \fImaxrate\fR"
+.IQ "\fB\-\-max\-rate \fImaxrate\fR"
+For \fBrate\fR, caps the maximum rate at which connections will be
+attempted to \fImaxrate\fR connections per second. By default there
+is no limit.
+.
+.IP "\fB\-T \fImaxsecs\fR"
+.IQ "\fB\-\-timeout \fImaxsecs\fR"
+For \fBrate\fR, stops the benchmark after \fImaxsecs\fR seconds have
+elapsed. By default, the benchmark continues until interrupted by a
+signal.
+.
+.SH NOTES
+.PP
+\fBovs\-benchmark\fR uses standard POSIX socket calls for network
+access, so it shares the strengths and limitations of TCP/IP and its
+implementations in the local and remote TCP/IP stacks. Particularly,
+TCP and its implementations limit the number of successfully completed
+and then closed TCP connections. This means that \fBovs\-benchmark\fR
+tests tend to slow down if run for long intervals or with large
+numbers of sockets or batches, if the remote system is listening on
+the port or ports being contacted. The problem does not occur when
+the remote system is not listening. \fBovs\-benchmark\fR results are
+therefore much more reliable and repeatable when the remote system is
+not listening on the port or ports being contacted. Even a single
+listening socket (e.g. range of ports 8000 to 9000 with one listener
+on port 8080) can cause anomalies in results.
+.
+.PP
+Be sure that the remote TCP/IP stack's firewall allows the benchmark's
+traffic to be processed. For Open vSwitch benchmarking purposes, you
+might want to disable the firewall with, e.g., \fBiptables \-F\fR.
+.
+.PP
+\fBovs\-benchmark\fR is single-threaded. A multithreaded process
+might be able to initiate connections more quickly.
+.
+.PP
+A TCP connection consists of two flows (one in each direction), so
+multiply the TCP connection statistics that \fBovs\-benchmark\fR
+reports by 2 to get flow statistics.
--- /dev/null
+/*
+ * Copyright (c) 2010, 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <poll.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <stddef.h>
+#include <unistd.h>
+
+#include "command-line.h"
+#include "poll-loop.h"
+#include "socket-util.h"
+#include "timeval.h"
+#include "util.h"
+#include "vlog.h"
+
+#define DEFAULT_PORT 6630
+
+#define MAX_SOCKETS 65535
+static int n_batches = 1;
+static int n_sockets = 100;
+
+static struct in_addr local_addr;
+static unsigned short int local_min_port, local_max_port;
+
+static struct in_addr remote_addr;
+static unsigned short int remote_min_port, remote_max_port;
+
+static double max_rate;
+
+static double timeout;
+
+static const struct command all_commands[];
+
+static void parse_options(int argc, char *argv[]);
+static void usage(void);
+
+static long long int
+time_in_msec(void)
+{
+ struct timeval tv;
+
+ if (gettimeofday(&tv, NULL) < 0) {
+ ovs_fatal(errno, "gettimeofday");
+ }
+
+ return tv.tv_sec * 1000LL + tv.tv_usec / 1000;
+}
+
+int
+main(int argc, char *argv[])
+{
+ set_program_name(argv[0]);
+ vlog_set_levels(NULL, VLF_ANY_FACILITY, VLL_EMER);
+ parse_options(argc, argv);
+ run_command(argc - optind, argv + optind, all_commands);
+ return 0;
+}
+
+static void
+parse_target(const char *s_, struct in_addr *addr,
+ unsigned short int *min, unsigned short int *max)
+{
+ char *s = xstrdup(s_);
+ char *colon;
+ int error;
+
+ colon = strchr(s, ':');
+ if (colon) {
+ *colon = '\0';
+ }
+
+ if (*s != '\0') {
+ error = lookup_hostname(s, addr);
+ if (error) {
+ ovs_fatal(error, "failed to look up IP address for \"%s\"", s_);
+ }
+ } else {
+ addr->s_addr = htonl(INADDR_ANY);
+ }
+
+ *min = *max = 0;
+ if (colon && colon[1] != '\0') {
+ const char *ports = colon + 1;
+ if (sscanf(ports, "%hu-%hu", min, max) == 2) {
+ if (*min > *max) {
+ ovs_fatal(0, "%s: minimum is greater than maximum", s_);
+ }
+ } else if (sscanf(ports, "%hu", min) == 1) {
+ *max = *min;
+ } else {
+ ovs_fatal(0, "%s: number or range expected", s_);
+ }
+ }
+
+ free(s);
+}
+
+static void
+parse_options(int argc, char *argv[])
+{
+ static struct option long_options[] = {
+ {"local", required_argument, NULL, 'l'},
+ {"remote", required_argument, NULL, 'r'},
+ {"batches", required_argument, NULL, 'b'},
+ {"sockets", required_argument, NULL, 's'},
+ {"max-rate", required_argument, NULL, 'c'},
+ {"timeout", required_argument, NULL, 'T'},
+ {"help", no_argument, NULL, 'h'},
+ {"version", no_argument, NULL, 'V'},
+ {NULL, 0, NULL, 0},
+ };
+ char *short_options = long_options_to_short_options(long_options);
+
+ local_addr.s_addr = htonl(INADDR_ANY);
+ local_min_port = local_max_port = 0;
+
+ remote_addr.s_addr = htonl(0);
+ remote_min_port = remote_max_port = 0;
+
+ for (;;) {
+ int c;
+
+ c = getopt_long(argc, argv, short_options, long_options, NULL);
+ if (c == -1) {
+ break;
+ }
+
+ switch (c) {
+ case 'l':
+ parse_target(optarg,
+ &local_addr, &local_min_port, &local_max_port);
+ break;
+
+ case 'r':
+ parse_target(optarg,
+ &remote_addr, &remote_min_port, &remote_max_port);
+ if (remote_addr.s_addr == htonl(INADDR_ANY)) {
+ ovs_fatal(0, "remote IP address is required");
+ }
+ break;
+
+ case 'b':
+ n_batches = atoi(optarg);
+ if (n_batches < 0) {
+ ovs_fatal(0, "--batches or -b argument must be at least 1");
+ }
+ break;
+
+ case 's':
+ n_sockets = atoi(optarg);
+ if (n_sockets < 1 || n_sockets > MAX_SOCKETS) {
+ ovs_fatal(0, "--sockets or -s argument must be between 1 "
+ "and %d (inclusive)", MAX_SOCKETS);
+ }
+ break;
+
+ case 'c':
+ max_rate = atof(optarg);
+ if (max_rate <= 0.0) {
+ ovs_fatal(0, "--max-rate or -c argument must be positive");
+ }
+ break;
+
+ case 'T':
+ timeout = atoi(optarg);
+ if (!timeout) {
+ ovs_fatal(0, "-T or --timeout argument must be positive");
+ }
+ break;
+
+ case 'h':
+ usage();
+
+ case 'V':
+ OVS_PRINT_VERSION(0, 0);
+ exit(EXIT_SUCCESS);
+
+ case '?':
+ exit(EXIT_FAILURE);
+
+ default:
+ abort();
+ }
+ }
+ free(short_options);
+}
+
+static void
+usage(void)
+{
+ printf("\
+%s: Open vSwitch flow setup benchmark utility\n\
+usage: %s [OPTIONS] COMMAND [ARG...]\n\
+ latency connect many times all at once\n\
+ rate measure sustained flow setup rate\n\
+ listen accept TCP connections\n\
+ help display this help message\n\
+\n\
+Command options:\n\
+ -l, --local [IP][:PORTS] use local IP and range of PORTS\n\
+ -r, --remote IP[:PORTS] connect to remote IP and PORTS\n\
+ -s, --sockets N number of sockets for \"rate\" or \"latency\"\n\
+ -b, --batches N number of connection batches for \"latency\"\n\
+ -c, --max-rate NPERSEC connection rate limit for \"rate\"\n\
+ -T, --timeout MAXSECS max number of seconds to run for \"rate\"\n\
+\n\
+Other options:\n\
+ -h, --help display this help message\n\
+ -V, --version display version information\n",
+ program_name, program_name);
+ exit(EXIT_SUCCESS);
+}
+
+static void
+cmd_listen(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
+{
+ struct pollfd *fds;
+ int n_fds;
+ int port;
+ int i;
+
+ if (!local_min_port && !local_max_port) {
+ local_min_port = local_max_port = DEFAULT_PORT;
+ }
+ fds = xmalloc((1 + local_max_port - local_min_port) * sizeof *fds);
+ n_fds = 0;
+ for (port = local_min_port; port <= local_max_port; port++) {
+ struct sockaddr_in sin;
+ unsigned int yes = 1;
+ int error;
+ int fd;
+
+ /* Create socket, set SO_REUSEADDR. */
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ ovs_fatal(errno, "failed to create socket");
+ }
+ error = set_nonblocking(fd);
+ if (error) {
+ ovs_fatal(error, "failed to set non-blocking mode");
+ }
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof yes) < 0) {
+ ovs_fatal(errno, "setsockopt(SO_REUSEADDR) failed");
+ }
+
+ /* Bind. */
+ sin.sin_family = AF_INET;
+ sin.sin_addr = remote_addr;
+ sin.sin_port = htons(port);
+ if (bind(fd, (struct sockaddr *) &sin, sizeof sin) < 0) {
+ ovs_fatal(errno, "bind failed");
+ }
+
+ /* Listen. */
+ if (listen(fd, 10000) < 0) {
+ ovs_fatal(errno, "listen failed");
+ }
+
+ fds[n_fds].fd = fd;
+ fds[n_fds].events = POLLIN;
+ n_fds++;
+ }
+
+ for (;;) {
+ int retval;
+
+ do {
+ retval = poll(fds, n_fds, -1);
+ } while (retval < 0 && errno == EINTR);
+ if (retval < 0) {
+ ovs_fatal(errno, "poll failed");
+ }
+
+ for (i = 0; i < n_fds; i++) {
+ if (fds[i].revents & POLLIN) {
+ int newfd;
+
+ do {
+ newfd = accept(fds[i].fd, NULL, NULL);
+ } while (newfd < 0 && errno == EINTR);
+
+ if (newfd >= 0) {
+ close(newfd);
+ } else if (errno != EAGAIN) {
+ ovs_fatal(errno, "accept failed");
+ }
+ }
+ }
+ }
+}
+
+/* Increments '*value' within the range 'min...max' inclusive. Returns true
+ * if '*value' wraps around to 'min', otherwise false. */
+static bool
+increment(unsigned short int *value,
+ unsigned short int min, unsigned short int max)
+{
+ if (*value < max) {
+ ++*value;
+ return false;
+ } else {
+ *value = min;
+ return true;
+ }
+}
+
+static void
+next_ports(unsigned short int *local_port, unsigned short int *remote_port)
+{
+ if (increment(local_port, local_min_port, local_max_port)) {
+ increment(remote_port, remote_min_port, remote_max_port);
+ }
+}
+
+static void
+bind_local_port(int fd, unsigned short int *local_port,
+ unsigned short int *remote_port)
+{
+ int error;
+
+ if (!local_min_port && !local_max_port) {
+ next_ports(local_port, remote_port);
+ return;
+ }
+
+ do {
+ struct sockaddr_in local;
+
+ memset(&local, 0, sizeof local);
+ local.sin_family = AF_INET;
+ local.sin_addr = local_addr;
+ local.sin_port = htons(*local_port);
+ error = (bind(fd, (struct sockaddr *) &local, sizeof local) < 0
+ ? errno : 0);
+ next_ports(local_port, remote_port);
+ } while (error == EADDRINUSE || error == EINTR);
+ if (error) {
+ ovs_fatal(error, "bind failed");
+ }
+}
+
+static void
+cmd_rate(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
+{
+ unsigned short int local_port;
+ unsigned short int remote_port;
+ unsigned int completed = 0;
+ unsigned int failures = 0;
+ long long int start, prev;
+ struct pollfd *fds;
+ int n_fds;
+
+ if (!remote_addr.s_addr) {
+ ovs_fatal(0, "remote address must be specified with -r or --remote");
+ }
+ if (!remote_min_port && !remote_max_port) {
+ remote_min_port = remote_max_port = DEFAULT_PORT;
+ }
+
+ local_port = local_min_port;
+ remote_port = remote_min_port;
+ fds = xmalloc(n_sockets * sizeof *fds);
+ n_fds = 0;
+ start = prev = time_in_msec();
+ for (;;) {
+ long long int now;
+ long long int may_open;
+ int delay;
+ int error;
+ int j;
+
+ if (max_rate > 0) {
+ long long int cur_total = completed + n_fds;
+ long long int max_total = (time_in_msec() - start) * (max_rate / 1000.0);
+ if (max_total > cur_total) {
+ may_open = MIN(n_sockets, max_total - cur_total);
+ } else {
+ may_open = 0;
+ }
+ delay = 1000.0 / max_rate;
+ } else {
+ may_open = n_sockets;
+ delay = 1000;
+ }
+
+ while (may_open-- > 0 && n_fds < n_sockets) {
+ struct sockaddr_in remote;
+ int error;
+ int fd;
+
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ ovs_fatal(errno, "socket failed");
+ }
+
+ error = set_nonblocking(fd);
+ if (error) {
+ ovs_fatal(error, "set_nonblocking failed");
+ }
+
+ bind_local_port(fd, &local_port, &remote_port);
+
+ memset(&remote, 0, sizeof remote);
+ remote.sin_family = AF_INET;
+ remote.sin_addr = remote_addr;
+ remote.sin_port = htons(remote_port);
+ if (connect(fd, (struct sockaddr *) &remote, sizeof remote) < 0) {
+ if (errno == EINPROGRESS) {
+ fds[n_fds].fd = fd;
+ fds[n_fds].events = POLLOUT;
+ fds[n_fds].revents = 0;
+ n_fds++;
+ } else if (errno != ECONNREFUSED) {
+ ovs_fatal(errno, "connect");
+ }
+ } else {
+ /* Success, I guess. */
+ shutdown(fd, 2);
+ close(fd);
+ completed++;
+ }
+ }
+
+ if (n_fds == n_sockets) {
+ delay = 1000;
+ }
+
+ do {
+ error = poll(fds, n_fds, delay) < 0 ? errno : 0;
+ } while (error == EINTR);
+ if (error) {
+ ovs_fatal(errno, "poll");
+ }
+
+ for (j = 0; j < n_fds; ) {
+ if (fds[j].revents) {
+ if (fds[j].revents & POLLERR) {
+ failures++;
+ }
+ shutdown(fds[j].fd, 2);
+ close(fds[j].fd);
+ fds[j] = fds[--n_fds];
+ completed++;
+ } else {
+ j++;
+ }
+ }
+
+ now = time_in_msec();
+ if (now >= prev + 10) {
+ long long int elapsed = now - start;
+ printf("%.3f s elapsed, %u OK, %u failed, avg %.1f/s \r",
+ elapsed / 1000.0, completed - failures, failures,
+ completed / (elapsed / 1000.0));
+ fflush(stdout);
+ prev = now;
+
+ if (timeout && elapsed > timeout * 1000LL) {
+ break;
+ }
+ }
+ }
+}
+
+static void
+timer_end(long long int start, bool error,
+ int *min, int *max, unsigned long long int *total)
+{
+ int elapsed = time_in_msec() - start;
+ static int last_elapsed = INT_MIN;
+ char c = error ? '!' : '.';
+
+ if (last_elapsed != elapsed) {
+ if (last_elapsed != INT_MIN) {
+ putchar('\n');
+ }
+ printf("%5d %c", elapsed, c);
+ fflush(stdout);
+ last_elapsed = elapsed;
+ } else {
+ putchar(c);
+ fflush(stdout);
+ }
+
+ if (elapsed < *min) {
+ *min = elapsed;
+ }
+ if (elapsed > *max) {
+ *max = elapsed;
+ }
+ *total += elapsed;
+}
+
+static void
+cmd_latency(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
+{
+ unsigned short int local_port;
+ unsigned short int remote_port;
+ int min = INT_MAX;
+ int max = 0;
+ unsigned long long int total = 0;
+ int i;
+
+ if (!remote_addr.s_addr) {
+ ovs_fatal(0, "remote address must be specified with -r or --rate");
+ }
+ if (!remote_min_port && !remote_max_port) {
+ remote_min_port = remote_max_port = DEFAULT_PORT;
+ }
+
+ local_port = local_min_port;
+ remote_port = remote_min_port;
+ for (i = 0; i < n_batches; i++) {
+ struct pollfd fds[MAX_SOCKETS];
+ long long int start;
+ int n_fds;
+ int j;
+
+ start = time_in_msec();
+ n_fds = 0;
+ for (j = 0; j < n_sockets; j++) {
+ struct sockaddr_in remote;
+ int error;
+ int fd;
+
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ ovs_fatal(errno, "socket failed");
+ }
+
+ error = set_nonblocking(fd);
+ if (error) {
+ ovs_fatal(error, "set_nonblocking failed");
+ }
+
+ bind_local_port(fd, &local_port, &remote_port);
+
+ memset(&remote, 0, sizeof remote);
+ remote.sin_family = AF_INET;
+ remote.sin_addr = remote_addr;
+ remote.sin_port = htons(remote_port);
+ if (connect(fd, (struct sockaddr *) &remote, sizeof remote) < 0) {
+ if (errno == EINPROGRESS) {
+ fds[n_fds].fd = fd;
+ fds[n_fds].events = POLLOUT;
+ fds[n_fds].revents = 0;
+ n_fds++;
+ } else if (errno != ECONNREFUSED) {
+ ovs_fatal(errno, "connect");
+ }
+ } else {
+ /* Success, I guess. */
+ close(fd);
+ timer_end(start, 0, &min, &max, &total);
+ }
+ }
+
+ while (n_fds > 0) {
+ int error;
+
+ do {
+ error = poll(fds, n_fds, -1) < 0 ? errno : 0;
+ } while (error == EINTR);
+ if (error) {
+ ovs_fatal(errno, "poll");
+ }
+
+ for (j = 0; j < n_fds; ) {
+ if (fds[j].revents) {
+ timer_end(start,
+ fds[j].revents & (POLLERR|POLLHUP) ? 1 : 0,
+ &min, &max, &total);
+ close(fds[j].fd);
+ fds[j] = fds[--n_fds];
+ } else {
+ j++;
+ }
+ }
+ }
+ putchar('\n');
+ }
+
+ printf("min %d ms, max %d ms, avg %llu ms\n",
+ min, max, total / (1ULL * n_sockets * n_batches));
+}
+
+static void
+cmd_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
+{
+ usage();
+}
+
+static const struct command all_commands[] = {
+ { "listen", 0, 0, cmd_listen },
+ { "rate", 0, 0, cmd_rate },
+ { "latency", 0, 0, cmd_latency },
+ { "help", 0, 0, cmd_help },
+ { NULL, 0, 0, NULL },
+};
projects / openvswitch / commitdiff