/usr/share/gocode/src/github.com/linuxkit/virtsock/c/hvbench.c is in golang-github-linuxkit-virtsock-dev 0.0~git20170720.0.0416e3d-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* A Hyper-V socket benchmarking program
*/
#include "compat.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* 3049197C-FACB-11E6-BD58-64006A7986D3 */
DEFINE_GUID(BM_GUID,
0x3049197c, 0xfacb, 0x11e6, 0xbd, 0x58, 0x64, 0x00, 0x6a, 0x79, 0x86, 0xd3);
#define BM_PORT 0x3049197c
#ifdef _MSC_VER
static WSADATA wsaData;
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(_arr) (sizeof(_arr)/sizeof(*(_arr)))
#endif
/* Use a static buffer for send and receive. */
#define MAX_BUF_LEN (2 * 1024 * 1024)
static char buf[MAX_BUF_LEN];
/* Time (in ns) to run eeach bandwidth test */
#define BM_BW_TIME (10ULL * 1000 * 1000 * 1000)
/* How many connections to make */
#define BM_CONNS 2000
static int verbose;
#define INFO(...) \
do { \
if (verbose) { \
printf(__VA_ARGS__); \
fflush(stdout); \
} \
} while (0)
#define DBG(...) \
do { \
if (verbose > 1) { \
printf(__VA_ARGS__); \
fflush(stdout); \
} \
} while (0)
#define TRC(...) \
do { \
if (verbose > 2) { \
printf(__VA_ARGS__); \
fflush(stdout); \
} \
} while (0)
enum benchmark {
BM_BW_UNI = 1, /* Uni-directional Bandwidth benchamrk */
BM_LAT = 2, /* Message ping-pong latency over single connection */
BM_CONN = 3, /* Connection benchmark */
};
/* There's anecdotal evidence that a blocking send()/recv() is slower
* than performing non-blocking send()/recv() calls and then use
* epoll()/WSAPoll(). This flags switches between the two
*/
static int opt_poll;
/* Use the vsock interface on Linux */
static int opt_vsock;
/* Bandwidth tests:
*
* The TX side sends a fixed amount of data in fixed sized
* messages. The RX side drains the ring in message sized chunks (or less).
*/
static int bw_rx(SOCKET fd, int msg_sz)
{
struct pollfd pfd = { 0 };
int rx_sz;
int ret;
if (opt_poll) {
pfd.fd = fd;
pfd.events = POLLIN;
}
rx_sz = msg_sz ? msg_sz : ARRAY_SIZE(buf);
DBG("bw_rx: msg_sz=%d rx_sz=%d\n", msg_sz, rx_sz);
for (;;) {
ret = recv(fd, buf, rx_sz, 0);
if (ret == 0) {
break;
} else if (ret == SOCKET_ERROR) {
if (opt_poll && poll_check()) {
pfd.revents = 0;
poll(&pfd, 1, -1); /* XXX no error checking */
continue;
}
sockerr("recv()");
ret = -1;
goto err_out;
}
TRC("Received: %d\n", ret);
}
ret = 0;
err_out:
return ret;
}
static int bw_tx(SOCKET fd, int msg_sz, uint64_t *bw)
{
struct pollfd pfd = { 0 };
uint64_t start, end, diff;
int msgs_sent = 0;
int tx_sz;
int sent;
int ret;
if (opt_poll) {
pfd.fd = fd;
pfd.events = POLLOUT;
}
tx_sz = msg_sz ? msg_sz : ARRAY_SIZE(buf);
DBG("bw_tx: msg_sz=%d tx_sz=%d \n", msg_sz, tx_sz);
start = time_ns();
end = time_ns();
while (end < start + BM_BW_TIME) {
sent = 0;
while (sent < tx_sz) {
ret = send(fd, buf + sent, tx_sz - sent, 0);
if (ret == SOCKET_ERROR) {
if (opt_poll && poll_check()) {
pfd.revents = 0;
poll(&pfd, 1, -1); /* XXX no error checking */
continue;
}
sockerr("send()");
ret = -1;
goto err_out;
}
sent += ret;
TRC("Sent: %d %d\n", sent, ret);
}
msgs_sent++;
if (!(msgs_sent % 1000))
end = time_ns();
}
DBG("bw_tx: %d %"PRIu64" %"PRIu64"\n", msgs_sent, start, end);
/* Bandwidth in Mbits per second */
diff = end - start;
diff /= 1000 * 1000; /* Time in milliseconds */
*bw = (8ULL * msgs_sent * msg_sz * 1000) / (diff * 1024 * 1024);
ret = 0;
err_out:
return ret;
}
/*
* Main server and client entry points
*/
static int server(int bm, int msg_sz)
{
SOCKET lsock, csock;
SOCKADDR_VM savm, sacvm;
SOCKADDR_HV sahv, sachv;
socklen_t socklen;
int max_conn;
int ret = 0;
INFO("server: bm=%d msg_sz=%d\n", bm, msg_sz);
if (opt_vsock)
lsock = socket(AF_VSOCK, SOCK_STREAM, 0);
else
lsock = socket(AF_HYPERV, SOCK_STREAM, HV_PROTOCOL_RAW);
if (lsock == INVALID_SOCKET) {
sockerr("socket()");
return 1;
}
memset(&savm, 0, sizeof(savm));
savm.Family = AF_VSOCK;
savm.SvmPort = BM_PORT;
savm.SvmCID = VMADDR_CID_ANY; /* Ignore target here */
memset(&sahv, 0, sizeof(sahv));
sahv.Family = AF_HYPERV;
sahv.VmId = HV_GUID_WILDCARD;
sahv.ServiceId = BM_GUID;
if (opt_vsock)
ret = bind(lsock, (const struct sockaddr *)&savm, sizeof(savm));
else
ret = bind(lsock, (const struct sockaddr *)&sahv, sizeof(sahv));
if (ret == SOCKET_ERROR) {
sockerr("bind()");
closesocket(lsock);
return 1;
}
ret = listen(lsock, SOMAXCONN);
if (ret == SOCKET_ERROR) {
sockerr("listen()");
goto err_out;
}
INFO("server: listening\n");
if (bm == BM_CONN)
max_conn = BM_CONNS;
else
max_conn = 1;
while (max_conn) {
max_conn--;
memset(&sacvm, 0, sizeof(sacvm));
memset(&sachv, 0, sizeof(sachv));
if (opt_vsock) {
socklen = sizeof(sacvm);
csock = accept(lsock, (struct sockaddr *)&sacvm, &socklen);
} else {
socklen = sizeof(sachv);
csock = accept(lsock, (struct sockaddr *)&sachv, &socklen);
}
if (csock == INVALID_SOCKET) {
sockerr("accept()");
ret = -1;
continue;
}
INFO("server: accepted\n");
/* Switch to non-blocking if we want to poll */
if (opt_poll)
poll_enable(csock);
ret = bw_rx(csock, msg_sz);
closesocket(csock);
}
err_out:
closesocket(lsock);
return ret;
}
static int client(GUID target, int bm, int msg_sz)
{
SOCKET fd;
SOCKADDR_VM savm;
SOCKADDR_HV sahv;
uint64_t res;
int ret = 0;
INFO("client: bm=%d msg_sz=%d\n", bm, msg_sz);
if (opt_vsock)
fd = socket(AF_VSOCK, SOCK_STREAM, 0);
else
fd = socket(AF_HYPERV, SOCK_STREAM, HV_PROTOCOL_RAW);
if (fd == INVALID_SOCKET) {
sockerr("socket()");
return 1;
}
memset(&sahv, 0, sizeof(sahv));
savm.Family = AF_VSOCK;
savm.SvmPort = BM_PORT;
savm.SvmCID = VMADDR_CID_ANY; /* Ignore target here */
memset(&sahv, 0, sizeof(sahv));
sahv.Family = AF_HYPERV;
sahv.VmId = target;
sahv.ServiceId = BM_GUID;
if (opt_vsock)
ret = connect(fd, (const struct sockaddr *)&savm, sizeof(savm));
else
ret = connect(fd, (const struct sockaddr *)&sahv, sizeof(sahv));
if (ret == SOCKET_ERROR) {
sockerr("connect()");
ret = -1;
goto err_out;
}
INFO("client: connected\n");
/* Switch to non-blocking if we want to poll */
if (opt_poll)
poll_enable(fd);
if (bm == BM_BW_UNI) {
ret = bw_tx(fd, msg_sz, &res);
if (ret)
goto err_out;
printf("%d %"PRIu64"\n", msg_sz, res);
} else {
fprintf(stderr, "Unknown benchmark %d\n", bm);
ret = -1;
}
err_out:
closesocket(fd);
return ret;
}
/* Different client for connection tests */
#define BM_CONN_TIMEOUT 500 /* 500ms */
static int client_conn(GUID target)
{
uint64_t start, end, diff;
int histogram[3 * 9 + 3];
SOCKADDR_VM savm;
SOCKADDR_HV sahv;
SOCKET fd;
int sum;
int ret;
int i;
memset(histogram, 0, sizeof(histogram));
INFO("client: connection test\n");
for (i = 0; i < BM_CONNS; i++) {
if (opt_vsock)
fd = socket(AF_VSOCK, SOCK_STREAM, 0);
else
fd = socket(AF_HYPERV, SOCK_STREAM, HV_PROTOCOL_RAW);
if (fd == INVALID_SOCKET) {
histogram[ARRAY_SIZE(histogram) - 1] += 1;
DBG("conn: %d -> socket error\n", i);
continue;
}
memset(&sahv, 0, sizeof(sahv));
savm.Family = AF_VSOCK;
savm.SvmPort = BM_PORT;
savm.SvmCID = VMADDR_CID_ANY; /* Ignore target here */
memset(&sahv, 0, sizeof(sahv));
sahv.Family = AF_HYPERV;
sahv.VmId = target;
sahv.ServiceId = BM_GUID;
start = time_ns();
if (opt_poll)
if (opt_vsock)
ret = connect_ex(fd, (const struct sockaddr *)&savm, sizeof(savm),
BM_CONN_TIMEOUT);
else
ret = connect_ex(fd, (const struct sockaddr *)&sahv, sizeof(sahv),
BM_CONN_TIMEOUT);
else
if (opt_vsock)
ret = connect(fd, (const struct sockaddr *)&savm, sizeof(savm));
else
ret = connect(fd, (const struct sockaddr *)&sahv, sizeof(sahv));
if (ret == SOCKET_ERROR) {
histogram[ARRAY_SIZE(histogram) - 2] += 1;
DBG("conn: %d -> connect error\n", i);
} else {
end = time_ns();
diff = (end - start);
DBG("conn: %d -> %"PRIu64"ns\n", i, diff);
diff /= (1000 * 1000);
if (diff < 10)
histogram[diff] += 1;
else if (diff < 100)
histogram[9 + diff / 10] += 1;
else if (diff < 1000)
histogram[18 + diff / 100] += 1;
else
histogram[ARRAY_SIZE(histogram) - 3] += 1;
}
closesocket(fd);
}
/* Print the results */
printf("# time (ms) vs count vs cumulative percent\n");
sum = 0;
for (i = 0; i < ARRAY_SIZE(histogram); i++) {
sum += histogram[i];
if (i < 9)
printf("%d %d %6.2f\n", i + 1, histogram[i],
sum * 100.0 / BM_CONNS);
else if (i < 18)
printf("%d %d %6.2f\n", (i - 9 + 1) * 10, histogram[i],
sum * 100.0 / BM_CONNS);
else if (i < 27)
printf("%d %d %6.2f\n", (i - 18 + 1) * 100, histogram[i],
sum * 100.0 / BM_CONNS);
else if (i == ARRAY_SIZE(histogram) - 3)
printf(">=%d %d %6.2f\n", (i - 27 + 1) * 1000, histogram[i],
sum * 100.0 / BM_CONNS);
else if (i == ARRAY_SIZE(histogram) - 2)
printf("connect_err %d %6.2f\n", histogram[i],
sum * 100.0 / BM_CONNS);
else
printf("socket_err %d %6.2f\n", histogram[i],
sum * 100.0 / BM_CONNS);
}
return 0;
}
void usage(char *name)
{
printf("%s: -s|-c <carg> -b|-l -m <sz> [-v]\n", name);
printf(" -s Server mode\n");
printf(" -c <carg> Client mode. <carg>:\n");
printf(" 'loopback': Connect in loopback mode\n");
printf(" 'parent': Connect to the parent partition\n");
printf(" <guid>: Connect to VM with GUID\n");
printf("\n");
printf(" -B Bandwidth test\n");
printf(" -L Latency test\n");
printf(" -C Connection test\n");
printf("\n");
printf(" -vsock Use vsock (Linux only)\n");
printf(" -m <sz> Message size in bytes\n");
printf(" -p Use poll instead of blocking send()/recv()\n");
printf(" -v Verbose output\n");
}
int __cdecl main(int argc, char **argv)
{
int opt_server = 0;
int opt_bm = 0;
int opt_msgsz = 0;
GUID target;
int res = 0;
int i;
#ifdef _MSC_VER
/* Initialize Winsock */
res = WSAStartup(MAKEWORD(2,2), &wsaData);
if (res != 0) {
fprintf(stderr, "WSAStartup() failed with error: %d\n", res);
return 1;
}
#endif
/* No getopt on windows. Do some manual parsing */
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-s") == 0) {
opt_server = 1;
} else if (strcmp(argv[i], "-c") == 0) {
opt_server = 0;
if (i + 1 >= argc) {
fprintf(stderr, "-c requires an argument\n");
usage(argv[0]);
goto out;
}
if (strcmp(argv[i + 1], "loopback") == 0) {
target = HV_GUID_LOOPBACK;
} else if (strcmp(argv[i + 1], "parent") == 0) {
target = HV_GUID_PARENT;
} else {
res = parseguid(argv[i + 1], &target);
if (res != 0) {
fprintf(stderr, "failed to scan: %s\n", argv[i + 1]);
goto out;
}
}
i++;
} else if (strcmp(argv[i], "-B") == 0) {
opt_bm = BM_BW_UNI;
} else if (strcmp(argv[i], "-L") == 0) {
opt_bm = BM_LAT;
} else if (strcmp(argv[i], "-C") == 0) {
opt_bm = BM_CONN;
} else if (strcmp(argv[i], "-vsock") == 0) {
opt_vsock = 1;
} else if (strcmp(argv[i], "-m") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "-m requires an argument\n");
usage(argv[0]);
goto out;
}
opt_msgsz = atoi(argv[++i]);
} else if (strcmp(argv[i], "-p") == 0) {
opt_poll = 1;
} else if (strcmp(argv[i], "-v") == 0) {
verbose++;
} else {
usage(argv[0]);
goto out;
}
}
#ifdef _MSC_VER
if (opt_vsock) {
fprintf(stderr, "-vsock is not valid on Windows\n");
goto out;
}
#endif
if (!opt_bm) {
fprintf(stderr, "You need to specify a test\n");
goto out;
}
if (opt_bm == BM_LAT) {
fprintf(stderr, "Latency tests currently not implemented\n");
goto out;
}
if (opt_server) {
res = server(opt_bm, opt_msgsz);
} else {
if (opt_bm == BM_CONN)
res = client_conn(target);
else
res = client(target, opt_bm, opt_msgsz);
}
out:
#ifdef _MSC_VER
WSACleanup();
#endif
return res;
}
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