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Code Issues Releases Wiki Activity

Add UDP ZeroCopy research

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This commit is contained in:
winlin 2020-04-21 12:12:32 +08:00
parent 74416e476a
commit 0fe9d9e324
2 changed files with 198 additions and 72 deletions
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168
trunk/research/msg_zerocopy/client.cpp
View file

@ -6,6 +6,7 @@
#include <assert.h> #include <assert.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <getopt.h>
#include <linux/version.h> #include <linux/version.h>
@ -30,6 +31,13 @@
#define MSG_ZEROCOPY 0x4000000 #define MSG_ZEROCOPY 0x4000000
#endif #endif
#include <netinet/udp.h>
// Define macro for UDP GSO.
// @see https://github.com/torvalds/linux/blob/master/tools/testing/selftests/net/udpgso.c
#ifndef UDP_SEGMENT
#define UDP_SEGMENT 103
#endif
void* receiver(void* arg) void* receiver(void* arg)
{ {
st_netfd_t stfd = (st_netfd_t)arg; st_netfd_t stfd = (st_netfd_t)arg;
@ -61,8 +69,10 @@ void* receiver(void* arg)
return NULL; return NULL;
} }
void parse_reception(st_netfd_t stfd) void parse_reception(st_netfd_t stfd, int nn_confirm)
{ {
int left = nn_confirm;
while (left > 0) {
msghdr msg; msghdr msg;
memset(&msg, 0, sizeof(msghdr)); memset(&msg, 0, sizeof(msghdr));
@ -86,6 +96,7 @@ void parse_reception(st_netfd_t stfd)
uint32_t hi = serr->ee_data; uint32_t hi = serr->ee_data;
uint32_t lo = serr->ee_info; uint32_t lo = serr->ee_info;
uint32_t range = hi - lo + 1; uint32_t range = hi - lo + 1;
left -= range;
printf("Reception %d bytes, flags %#x, cmsg(level %#x, type %#x), serr(errno %#x, origin %#x, code %#x), range %d [%d, %d]\n", printf("Reception %d bytes, flags %#x, cmsg(level %#x, type %#x), serr(errno %#x, origin %#x, code %#x), range %d [%d, %d]\n",
msg.msg_controllen, msg.msg_flags, cm->cmsg_level, cm->cmsg_type, serr->ee_errno, serr->ee_origin, serr->ee_code, range, lo, hi); msg.msg_controllen, msg.msg_flags, cm->cmsg_level, cm->cmsg_type, serr->ee_errno, serr->ee_origin, serr->ee_code, range, lo, hi);
@ -93,31 +104,77 @@ void parse_reception(st_netfd_t stfd)
if (serr->ee_code == SO_EE_CODE_ZEROCOPY_COPIED) { if (serr->ee_code == SO_EE_CODE_ZEROCOPY_COPIED) {
printf("Warning: Defered copies, should stop zerocopy\n"); printf("Warning: Defered copies, should stop zerocopy\n");
} }
}
}
void usage(int argc, char** argv)
{
printf("Usage: %s <options>\n", argv[0]);
printf("Options:\n");
printf(" --help Print this help and exit.\n");
printf(" --host=string The host to send to.\n");
printf(" --port=int The port to send to.\n");
printf(" --pong=bool Whether response pong, true|false\n");
printf(" --zerocopy=bool Whether use zerocopy to sendmsg, true|false\n");
printf(" --copy=int The copies of message, 1 means sendmmsg(msg+msg)\n");
printf(" --loop=int The number of loop to send out messages\n");
printf(" --batch=bool Whether read reception by batch, true|false\n");
printf(" --mix=bool Whether mix msg with zerocopy and those without, true|false\n");
printf(" --size=int Each message size in bytes.\n");
printf(" --gso=int The GSO size in bytes, 0 to disable it.\n");
printf(" --iovs=int The number of iovs to send, at least 1.\n");
printf(" --sndbuf=int The SO_SNDBUF size in bytes, 0 to ignore.\n");
printf("For example:\n");
printf(" %s --host=127.0.0.1 --port=8000 --pong=true --zerocopy=true --copy=0 --loop=1 --batch=true --mix=true --size=1400 --gso=0 --iovs=1 --sndbuf=0\n", argv[0]);
} }
int main(int argc, char** argv) int main(int argc, char** argv)
{ {
if (argc < 8) { option longopts[] = {
printf("Usage: %s <host> <port> <pong> <zerocopy> <sendmmsg> <loop> <batch>\n", argv[0]); { "host", required_argument, NULL, 'o' },
printf(" pong Whether response pong, true|false\n"); { "port", required_argument, NULL, 'p' },
printf(" zerocopy Whether use zerocopy to sendmsg, true|false\n"); { "pong", required_argument, NULL, 'n' },
printf(" sendmmsg The copies of message, 1 means sendmmsg(msg+msg)\n"); { "zerocopy", required_argument, NULL, 'z' },
printf(" loop The number of loop to send out messages\n"); { "copy", required_argument, NULL, 'c' },
printf(" batch Whether read reception by batch, true|false\n"); { "loop", required_argument, NULL, 'l' },
printf("For example:\n"); { "batch", required_argument, NULL, 'b' },
printf(" %s 127.0.0.1 8000 true true 0 1 true\n", argv[0]); { "mix", required_argument, NULL, 'm' },
exit(-1); { "size", required_argument, NULL, 's' },
{ "gso", required_argument, NULL, 'g' },
{ "iovs", required_argument, NULL, 'i' },
{ "sndbuf", required_argument, NULL, 'u' },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
char* host = NULL; char ch;
int port = 0; int nn_copies = 0; int loop = 1; int size = 1500; int gso = 0; int nn_iovs = 0; int sndbuf = 0;
bool pong = false; bool zerocopy = false; bool batch = false; bool mix = false;
while ((ch = getopt_long(argc, argv, "o:p:n:z:c:l:b:m:s:g:u:h", longopts, NULL)) != -1) {
switch (ch) {
case 'o': host = (char*)optarg; break;
case 'p': port = atoi(optarg); break;
case 'n': pong = !strcmp(optarg,"true"); break;
case 'z': zerocopy = !strcmp(optarg,"true"); break;
case 'c': nn_copies = atoi(optarg); break;
case 'l': loop = atoi(optarg); break;
case 'b': batch = !strcmp(optarg,"true"); break;
case 'm': mix = !strcmp(optarg,"true"); break;
case 's': size = atoi(optarg); break;
case 'g': gso = atoi(optarg); break;
case 'i': nn_iovs = atoi(optarg); break;
case 'u': sndbuf = atoi(optarg); break;
case 'h': usage(argc, argv); exit(0);
default: usage(argc, argv); exit(-1);
}
} }
char* host = argv[1]; printf("Server listen %s:%d, pong %d, zerocopy %d, copies %d, loop %d, batch %d, mix %d, size %d, gso %d, iovs %d, sndbuf %d\n",
int port = atoi(argv[2]); host, port, pong, zerocopy, nn_copies, loop, batch, mix, size, gso, nn_iovs, sndbuf);
bool pong = !strcmp(argv[3], "true"); if (!host || !port || !nn_iovs) {
bool zerocopy = !strcmp(argv[4], "true"); usage(argc, argv);
int nn_copies = atoi(argv[5]); exit(-1);
int loop = atoi(argv[6]); }
bool batch = !strcmp(argv[7], "true");
printf("Server listen %s:%d, pong %d, zerocopy %d, copies %d, loop %d, batch %d\n",
host, port, pong, zerocopy, nn_copies, loop, batch);
assert(!st_set_eventsys(ST_EVENTSYS_ALT)); assert(!st_set_eventsys(ST_EVENTSYS_ALT));
assert(!st_init()); assert(!st_init());
@ -142,6 +199,21 @@ int main(int argc, char** argv)
printf("epoll events EPOLLERR=%#x, EPOLLHUP=%#x\n", EPOLLERR, EPOLLHUP); printf("epoll events EPOLLERR=%#x, EPOLLHUP=%#x\n", EPOLLERR, EPOLLHUP);
} }
if (true) {
int dv = 0;
socklen_t len = sizeof(dv);
int r0 = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &dv, &len);
int r1 = 0;
if (sndbuf > 0) {
r1 = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
}
int nv = 0;
int r2 = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &nv, &len);
printf("socket SO_SNDBUF default=%d, user=%d, now=%d, r0=%d, r1=%d, r2=%d\n", dv, sndbuf, nv, r0, r1, r2);
}
st_netfd_t stfd = st_netfd_open_socket(fd); st_netfd_t stfd = st_netfd_open_socket(fd);
assert(stfd); assert(stfd);
printf("Client fd=%d\n", fd); printf("Client fd=%d\n", fd);
@ -158,21 +230,40 @@ int main(int argc, char** argv)
peer.sin_port = htons(port); peer.sin_port = htons(port);
peer.sin_addr.s_addr = inet_addr(host); peer.sin_addr.s_addr = inet_addr(host);
char buf[1500]; char* buf = new char[size];
memset(buf, 0, sizeof(buf)); memset(buf, 0, size);
memcpy(buf, "Hello", 5); memcpy(buf, "Hello", size < 5? size : 5);
iovec iov; iovec iov;
iov.iov_base = buf; iov.iov_base = buf;
iov.iov_len = strlen(buf); iov.iov_len = size;
int nn_confirm = 0;
for (int k = 0; k < loop; k++) { for (int k = 0; k < loop; k++) {
msghdr msg; msghdr msg;
memset(&msg, 0, sizeof(msghdr)); memset(&msg, 0, sizeof(msghdr));
msg.msg_name = (sockaddr_in*)&peer; msg.msg_name = (sockaddr_in*)&peer;
msg.msg_namelen = sizeof(sockaddr_in); msg.msg_namelen = sizeof(sockaddr_in);
msg.msg_iov = &iov; msg.msg_iov = new iovec[nn_iovs];
msg.msg_iovlen = 1; msg.msg_iovlen = nn_iovs;
for (int i = 0; i < nn_iovs; i++) {
iovec* p = msg.msg_iov + i;
memcpy(p, &iov, sizeof(iovec));
}
if (gso > 0) {
msg.msg_controllen = CMSG_SPACE(sizeof(uint16_t));
if (!msg.msg_control) {
msg.msg_control = new char[msg.msg_controllen];
}
cmsghdr* cm = CMSG_FIRSTHDR(&msg);
cm->cmsg_level = SOL_UDP;
cm->cmsg_type = UDP_SEGMENT;
cm->cmsg_len = CMSG_LEN(sizeof(uint16_t));
*((uint16_t*)CMSG_DATA(cm)) = gso;
}
int r0; int r0;
if (nn_copies == 0) { if (nn_copies == 0) {
@ -194,22 +285,29 @@ int main(int argc, char** argv)
r0 = st_sendmmsg(stfd, hdrs, nn_copies + 1, 0, ST_UTIME_NO_TIMEOUT); r0 = st_sendmmsg(stfd, hdrs, nn_copies + 1, 0, ST_UTIME_NO_TIMEOUT);
} }
} }
assert(r0 > 0); if (r0 > 0) {
printf("Ping %s:%d %d bytes, copies=%d, r0=%d, %s\n", host, port, iov.iov_len, nn_copies, r0, msg.msg_iov->iov_base); printf("Ping %s:%d %d bytes, control %d, copies=%d, r0=%d, %s\n", host, port, iov.iov_len * nn_iovs,
msg.msg_controllen, nn_copies, r0, msg.msg_iov->iov_base);
if (!zerocopy) { } else {
continue; printf("Ping %d bytes, error r0=%d, errno=%d\n", iov.iov_len * nn_iovs, r0, errno); exit(1);
} }
if (!batch) { if (zerocopy && !batch) {
parse_reception(stfd); parse_reception(stfd, r0);
} else {
nn_confirm += r0;
}
if (mix) {
r0 = st_sendmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT);
assert(r0 > 0);
printf("Mix %s:%d %d bytes, r0=%d, %s\n", host, port, iov.iov_len * nn_iovs, r0, msg.msg_iov->iov_base);
} }
} }
// @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#notification-batching // @see https://www.kernel.org/doc/html/latest/networking/msg_zerocopy.html#notification-batching
if (batch) { if (batch) {
st_usleep(100 * 1000); parse_reception(stfd, nn_confirm);
parse_reception(stfd);
} }
st_sleep(-1); st_sleep(-1);

54
trunk/research/msg_zerocopy/server.cpp
View file

@ -6,6 +6,7 @@
#include <assert.h> #include <assert.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <getopt.h>
struct message { struct message {
st_netfd_t stfd; st_netfd_t stfd;
@ -47,22 +48,48 @@ void* sender(void* arg)
return NULL; return NULL;
} }
void usage(int argc, char** argv)
{
printf("Usage: %s <options>\n", argv[0]);
printf("Options:\n");
printf(" --help Print this help and exit.\n");
printf(" --host=string The host to send to.\n");
printf(" --port=int The port to send to.\n");
printf(" --pong=bool Whether response pong, true|false\n");
printf(" --delay=int The delay in ms to response pong.\n");
printf("For example:\n");
printf(" %s --host=0.0.0.0 --port=8000 --pong --delay=100\n", argv[0]);
}
int main(int argc, char** argv) int main(int argc, char** argv)
{ {
if (argc < 5) { option longopts[] = {
printf("Usage: %s <host> <port> <pong> <delay>\n", argv[0]); { "host", required_argument, NULL, 'o' },
printf(" pong Whether response pong, true|false\n"); { "port", required_argument, NULL, 'p' },
printf(" delay The delay in ms to response pong.\n"); { "pong", required_argument, NULL, 'n' },
printf("For example:\n"); { "delay", required_argument, NULL, 'd' },
printf(" %s 0.0.0.0 8000 true 100\n", argv[0]); { "help", no_argument, NULL, 'h' },
exit(-1); { NULL, 0, NULL, 0 }
};
char* host = NULL; char ch;
int port = 0; int delay = 0; bool pong = false;
while ((ch = getopt_long(argc, argv, "o:p:n:d:h", longopts, NULL)) != -1) {
switch (ch) {
case 'o': host = (char*)optarg; break;
case 'p': port = atoi(optarg); break;
case 'n': pong = !strcmp(optarg,"true"); break;
case 'd': delay = atoi(optarg); break;
case 'h': usage(argc, argv); exit(0);
default: usage(argc, argv); exit(-1);
}
} }
char* host = argv[1];
int port = atoi(argv[2]);
bool pong = !strcmp(argv[3], "true");
int delay = ::atoi(argv[4]);
printf("Server listen %s:%d, pong %d, delay: %dms\n", host, port, pong, delay); printf("Server listen %s:%d, pong %d, delay: %dms\n", host, port, pong, delay);
if (!host || !port) {
usage(argc, argv);
exit(-1);
}
assert(!st_set_eventsys(ST_EVENTSYS_ALT)); assert(!st_set_eventsys(ST_EVENTSYS_ALT));
assert(!st_init()); assert(!st_init());
@ -107,11 +134,12 @@ int main(int argc, char** argv)
msg.msg_iov = &iov; msg.msg_iov = &iov;
msg.msg_iovlen = 1; msg.msg_iovlen = 1;
int nn_msgs = 0;
while (true) { while (true) {
r0 = st_recvmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT); r0 = st_recvmsg(stfd, &msg, 0, ST_UTIME_NO_TIMEOUT);
assert(r0 > 0); assert(r0 > 0);
printf("From %s:%d %d bytes, flags %#x, %s\n", inet_ntoa(peer.sin_addr), ntohs(peer.sin_port), r0, printf("#%d, From %s:%d %d bytes, flags %#x, %s\n", nn_msgs++, inet_ntoa(peer.sin_addr), ntohs(peer.sin_port),
msg.msg_flags, msg.msg_iov->iov_base); r0, msg.msg_flags, msg.msg_iov->iov_base);
if (pong) { if (pong) {
message* msg = new message(); message* msg = new message();