diff options
Diffstat (limited to 'examples/ud_pingpong.c')
-rw-r--r-- | examples/ud_pingpong.c | 864 |
1 files changed, 0 insertions, 864 deletions
diff --git a/examples/ud_pingpong.c b/examples/ud_pingpong.c deleted file mode 100644 index 6d32ced..0000000 --- a/examples/ud_pingpong.c +++ /dev/null @@ -1,864 +0,0 @@ -/* - * Copyright (c) 2005 Topspin Communications. All rights reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the - * OpenIB.org BSD license below: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#if HAVE_CONFIG_H -# include <config.h> -#endif /* HAVE_CONFIG_H */ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/time.h> -#include <netdb.h> -#include <malloc.h> -#include <getopt.h> -#include <arpa/inet.h> -#include <time.h> - -#include "pingpong.h" - -enum { - PINGPONG_RECV_WRID = 1, - PINGPONG_SEND_WRID = 2, -}; - -static int page_size; - -struct pingpong_context { - struct ibv_context *context; - struct ibv_comp_channel *channel; - struct ibv_pd *pd; - struct ibv_mr *mr; - struct ibv_cq *cq; - struct ibv_qp *qp; - struct ibv_ah *ah; - void *buf; - int size; - int send_flags; - int rx_depth; - int pending; - struct ibv_port_attr portinfo; -}; - -struct pingpong_dest { - int lid; - int qpn; - int psn; - union ibv_gid gid; -}; - -static int pp_connect_ctx(struct pingpong_context *ctx, int port, int my_psn, - int sl, struct pingpong_dest *dest, int sgid_idx) -{ - struct ibv_ah_attr ah_attr = { - .is_global = 0, - .dlid = dest->lid, - .sl = sl, - .src_path_bits = 0, - .port_num = port - }; - struct ibv_qp_attr attr = { - .qp_state = IBV_QPS_RTR - }; - - if (ibv_modify_qp(ctx->qp, &attr, IBV_QP_STATE)) { - fprintf(stderr, "Failed to modify QP to RTR\n"); - return 1; - } - - attr.qp_state = IBV_QPS_RTS; - attr.sq_psn = my_psn; - - if (ibv_modify_qp(ctx->qp, &attr, - IBV_QP_STATE | - IBV_QP_SQ_PSN)) { - fprintf(stderr, "Failed to modify QP to RTS\n"); - return 1; - } - - if (dest->gid.global.interface_id) { - ah_attr.is_global = 1; - ah_attr.grh.hop_limit = 1; - ah_attr.grh.dgid = dest->gid; - ah_attr.grh.sgid_index = sgid_idx; - } - - ctx->ah = ibv_create_ah(ctx->pd, &ah_attr); - if (!ctx->ah) { - fprintf(stderr, "Failed to create AH\n"); - return 1; - } - - return 0; -} - -static struct pingpong_dest *pp_client_exch_dest(const char *servername, int port, - const struct pingpong_dest *my_dest) -{ - struct addrinfo *res, *t; - struct addrinfo hints = { - .ai_family = AF_UNSPEC, - .ai_socktype = SOCK_STREAM - }; - char *service; - char msg[sizeof "0000:000000:000000:00000000000000000000000000000000"]; - int n; - int sockfd = -1; - struct pingpong_dest *rem_dest = NULL; - char gid[33]; - - if (asprintf(&service, "%d", port) < 0) - return NULL; - - n = getaddrinfo(servername, service, &hints, &res); - - if (n < 0) { - fprintf(stderr, "%s for %s:%d\n", gai_strerror(n), servername, port); - free(service); - return NULL; - } - - for (t = res; t; t = t->ai_next) { - sockfd = socket(t->ai_family, t->ai_socktype, t->ai_protocol); - if (sockfd >= 0) { - if (!connect(sockfd, t->ai_addr, t->ai_addrlen)) - break; - close(sockfd); - sockfd = -1; - } - } - - freeaddrinfo(res); - free(service); - - if (sockfd < 0) { - fprintf(stderr, "Couldn't connect to %s:%d\n", servername, port); - return NULL; - } - - gid_to_wire_gid(&my_dest->gid, gid); - sprintf(msg, "%04x:%06x:%06x:%s", my_dest->lid, my_dest->qpn, - my_dest->psn, gid); - if (write(sockfd, msg, sizeof msg) != sizeof msg) { - fprintf(stderr, "Couldn't send local address\n"); - goto out; - } - - if (read(sockfd, msg, sizeof msg) != sizeof msg) { - perror("client read"); - fprintf(stderr, "Couldn't read remote address\n"); - goto out; - } - - write(sockfd, "done", sizeof "done"); - - rem_dest = malloc(sizeof *rem_dest); - if (!rem_dest) - goto out; - - sscanf(msg, "%x:%x:%x:%s", &rem_dest->lid, &rem_dest->qpn, - &rem_dest->psn, gid); - wire_gid_to_gid(gid, &rem_dest->gid); - -out: - close(sockfd); - return rem_dest; -} - -static struct pingpong_dest *pp_server_exch_dest(struct pingpong_context *ctx, - int ib_port, int port, int sl, - const struct pingpong_dest *my_dest, - int sgid_idx) -{ - struct addrinfo *res, *t; - struct addrinfo hints = { - .ai_flags = AI_PASSIVE, - .ai_family = AF_UNSPEC, - .ai_socktype = SOCK_STREAM - }; - char *service; - char msg[sizeof "0000:000000:000000:00000000000000000000000000000000"]; - int n; - int sockfd = -1, connfd; - struct pingpong_dest *rem_dest = NULL; - char gid[33]; - - if (asprintf(&service, "%d", port) < 0) - return NULL; - - n = getaddrinfo(NULL, service, &hints, &res); - - if (n < 0) { - fprintf(stderr, "%s for port %d\n", gai_strerror(n), port); - free(service); - return NULL; - } - - for (t = res; t; t = t->ai_next) { - sockfd = socket(t->ai_family, t->ai_socktype, t->ai_protocol); - if (sockfd >= 0) { - n = 1; - - setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n); - - if (!bind(sockfd, t->ai_addr, t->ai_addrlen)) - break; - close(sockfd); - sockfd = -1; - } - } - - freeaddrinfo(res); - free(service); - - if (sockfd < 0) { - fprintf(stderr, "Couldn't listen to port %d\n", port); - return NULL; - } - - listen(sockfd, 1); - connfd = accept(sockfd, NULL, 0); - close(sockfd); - if (connfd < 0) { - fprintf(stderr, "accept() failed\n"); - return NULL; - } - - n = read(connfd, msg, sizeof msg); - if (n != sizeof msg) { - perror("server read"); - fprintf(stderr, "%d/%d: Couldn't read remote address\n", n, (int) sizeof msg); - goto out; - } - - rem_dest = malloc(sizeof *rem_dest); - if (!rem_dest) - goto out; - - sscanf(msg, "%x:%x:%x:%s", &rem_dest->lid, &rem_dest->qpn, - &rem_dest->psn, gid); - wire_gid_to_gid(gid, &rem_dest->gid); - - if (pp_connect_ctx(ctx, ib_port, my_dest->psn, sl, rem_dest, - sgid_idx)) { - fprintf(stderr, "Couldn't connect to remote QP\n"); - free(rem_dest); - rem_dest = NULL; - goto out; - } - - gid_to_wire_gid(&my_dest->gid, gid); - sprintf(msg, "%04x:%06x:%06x:%s", my_dest->lid, my_dest->qpn, - my_dest->psn, gid); - if (write(connfd, msg, sizeof msg) != sizeof msg) { - fprintf(stderr, "Couldn't send local address\n"); - free(rem_dest); - rem_dest = NULL; - goto out; - } - - read(connfd, msg, sizeof msg); - -out: - close(connfd); - return rem_dest; -} - -static struct pingpong_context *pp_init_ctx(struct ibv_device *ib_dev, int size, - int rx_depth, int port, - int use_event) -{ - struct pingpong_context *ctx; - - ctx = malloc(sizeof *ctx); - if (!ctx) - return NULL; - - ctx->size = size; - ctx->send_flags = IBV_SEND_SIGNALED; - ctx->rx_depth = rx_depth; - - ctx->buf = memalign(page_size, size + 40); - if (!ctx->buf) { - fprintf(stderr, "Couldn't allocate work buf.\n"); - goto clean_ctx; - } - - /* FIXME memset(ctx->buf, 0, size + 40); */ - memset(ctx->buf, 0x7b, size + 40); - - ctx->context = ibv_open_device(ib_dev); - if (!ctx->context) { - fprintf(stderr, "Couldn't get context for %s\n", - ibv_get_device_name(ib_dev)); - goto clean_buffer; - } - - { - struct ibv_port_attr port_info = { 0 }; - int mtu; - - if (ibv_query_port(ctx->context, port, &port_info)) { - fprintf(stderr, "Unable to query port info for port %d\n", port); - goto clean_device; - } - mtu = 1 << (port_info.active_mtu + 7); - if (size > mtu) { - fprintf(stderr, "Requested size larger than port MTU (%d)\n", mtu); - goto clean_device; - } - } - - if (use_event) { - ctx->channel = ibv_create_comp_channel(ctx->context); - if (!ctx->channel) { - fprintf(stderr, "Couldn't create completion channel\n"); - goto clean_device; - } - } else - ctx->channel = NULL; - - ctx->pd = ibv_alloc_pd(ctx->context); - if (!ctx->pd) { - fprintf(stderr, "Couldn't allocate PD\n"); - goto clean_comp_channel; - } - - ctx->mr = ibv_reg_mr(ctx->pd, ctx->buf, size + 40, IBV_ACCESS_LOCAL_WRITE); - if (!ctx->mr) { - fprintf(stderr, "Couldn't register MR\n"); - goto clean_pd; - } - - ctx->cq = ibv_create_cq(ctx->context, rx_depth + 1, NULL, - ctx->channel, 0); - if (!ctx->cq) { - fprintf(stderr, "Couldn't create CQ\n"); - goto clean_mr; - } - - { - struct ibv_qp_attr attr; - struct ibv_qp_init_attr init_attr = { - .send_cq = ctx->cq, - .recv_cq = ctx->cq, - .cap = { - .max_send_wr = 1, - .max_recv_wr = rx_depth, - .max_send_sge = 1, - .max_recv_sge = 1 - }, - .qp_type = IBV_QPT_UD, - }; - - ctx->qp = ibv_create_qp(ctx->pd, &init_attr); - if (!ctx->qp) { - fprintf(stderr, "Couldn't create QP\n"); - goto clean_cq; - } - - ibv_query_qp(ctx->qp, &attr, IBV_QP_CAP, &init_attr); - if (init_attr.cap.max_inline_data >= size) { - ctx->send_flags |= IBV_SEND_INLINE; - } - } - - { - struct ibv_qp_attr attr = { - .qp_state = IBV_QPS_INIT, - .pkey_index = 0, - .port_num = port, - .qkey = 0x11111111 - }; - - if (ibv_modify_qp(ctx->qp, &attr, - IBV_QP_STATE | - IBV_QP_PKEY_INDEX | - IBV_QP_PORT | - IBV_QP_QKEY)) { - fprintf(stderr, "Failed to modify QP to INIT\n"); - goto clean_qp; - } - } - - return ctx; - -clean_qp: - ibv_destroy_qp(ctx->qp); - -clean_cq: - ibv_destroy_cq(ctx->cq); - -clean_mr: - ibv_dereg_mr(ctx->mr); - -clean_pd: - ibv_dealloc_pd(ctx->pd); - -clean_comp_channel: - if (ctx->channel) - ibv_destroy_comp_channel(ctx->channel); - -clean_device: - ibv_close_device(ctx->context); - -clean_buffer: - free(ctx->buf); - -clean_ctx: - free(ctx); - - return NULL; -} - -int pp_close_ctx(struct pingpong_context *ctx) -{ - if (ibv_destroy_qp(ctx->qp)) { - fprintf(stderr, "Couldn't destroy QP\n"); - return 1; - } - - if (ibv_destroy_cq(ctx->cq)) { - fprintf(stderr, "Couldn't destroy CQ\n"); - return 1; - } - - if (ibv_dereg_mr(ctx->mr)) { - fprintf(stderr, "Couldn't deregister MR\n"); - return 1; - } - - if (ibv_destroy_ah(ctx->ah)) { - fprintf(stderr, "Couldn't destroy AH\n"); - return 1; - } - - if (ibv_dealloc_pd(ctx->pd)) { - fprintf(stderr, "Couldn't deallocate PD\n"); - return 1; - } - - if (ctx->channel) { - if (ibv_destroy_comp_channel(ctx->channel)) { - fprintf(stderr, "Couldn't destroy completion channel\n"); - return 1; - } - } - - if (ibv_close_device(ctx->context)) { - fprintf(stderr, "Couldn't release context\n"); - return 1; - } - - free(ctx->buf); - free(ctx); - - return 0; -} - -static int pp_post_recv(struct pingpong_context *ctx, int n) -{ - struct ibv_sge list = { - .addr = (uintptr_t) ctx->buf, - .length = ctx->size + 40, - .lkey = ctx->mr->lkey - }; - struct ibv_recv_wr wr = { - .wr_id = PINGPONG_RECV_WRID, - .sg_list = &list, - .num_sge = 1, - }; - struct ibv_recv_wr *bad_wr; - int i; - - for (i = 0; i < n; ++i) - if (ibv_post_recv(ctx->qp, &wr, &bad_wr)) - break; - - return i; -} - -static int pp_post_send(struct pingpong_context *ctx, uint32_t qpn) -{ - struct ibv_sge list = { - .addr = (uintptr_t) ctx->buf + 40, - .length = ctx->size, - .lkey = ctx->mr->lkey - }; - struct ibv_send_wr wr = { - .wr_id = PINGPONG_SEND_WRID, - .sg_list = &list, - .num_sge = 1, - .opcode = IBV_WR_SEND, - .send_flags = ctx->send_flags, - .wr = { - .ud = { - .ah = ctx->ah, - .remote_qpn = qpn, - .remote_qkey = 0x11111111 - } - } - }; - struct ibv_send_wr *bad_wr; - - return ibv_post_send(ctx->qp, &wr, &bad_wr); -} - -static void usage(const char *argv0) -{ - printf("Usage:\n"); - printf(" %s start a server and wait for connection\n", argv0); - printf(" %s <host> connect to server at <host>\n", argv0); - printf("\n"); - printf("Options:\n"); - printf(" -p, --port=<port> listen on/connect to port <port> (default 18515)\n"); - printf(" -d, --ib-dev=<dev> use IB device <dev> (default first device found)\n"); - printf(" -i, --ib-port=<port> use port <port> of IB device (default 1)\n"); - printf(" -s, --size=<size> size of message to exchange (default 2048)\n"); - printf(" -r, --rx-depth=<dep> number of receives to post at a time (default 500)\n"); - printf(" -n, --iters=<iters> number of exchanges (default 1000)\n"); - printf(" -e, --events sleep on CQ events (default poll)\n"); - printf(" -g, --gid-idx=<gid index> local port gid index\n"); -} - -int main(int argc, char *argv[]) -{ - struct ibv_device **dev_list; - struct ibv_device *ib_dev; - struct pingpong_context *ctx; - struct pingpong_dest my_dest; - struct pingpong_dest *rem_dest; - struct timeval start, end; - char *ib_devname = NULL; - char *servername = NULL; - unsigned int port = 18515; - int ib_port = 1; - unsigned int size = 2048; - unsigned int rx_depth = 500; - unsigned int iters = 1000; - int use_event = 0; - int routs; - int rcnt, scnt; - int num_cq_events = 0; - int sl = 0; - int gidx = -1; - char gid[33]; - - srand48(getpid() * time(NULL)); - - while (1) { - int c; - - static struct option long_options[] = { - { .name = "port", .has_arg = 1, .val = 'p' }, - { .name = "ib-dev", .has_arg = 1, .val = 'd' }, - { .name = "ib-port", .has_arg = 1, .val = 'i' }, - { .name = "size", .has_arg = 1, .val = 's' }, - { .name = "rx-depth", .has_arg = 1, .val = 'r' }, - { .name = "iters", .has_arg = 1, .val = 'n' }, - { .name = "sl", .has_arg = 1, .val = 'l' }, - { .name = "events", .has_arg = 0, .val = 'e' }, - { .name = "gid-idx", .has_arg = 1, .val = 'g' }, - { 0 } - }; - - c = getopt_long(argc, argv, "p:d:i:s:r:n:l:eg:", - long_options, NULL); - if (c == -1) - break; - - switch (c) { - case 'p': - port = strtol(optarg, NULL, 0); - if (port > 65535) { - usage(argv[0]); - return 1; - } - break; - - case 'd': - ib_devname = strdupa(optarg); - break; - - case 'i': - ib_port = strtol(optarg, NULL, 0); - if (ib_port < 1) { - usage(argv[0]); - return 1; - } - break; - - case 's': - size = strtoul(optarg, NULL, 0); - break; - - case 'r': - rx_depth = strtoul(optarg, NULL, 0); - break; - - case 'n': - iters = strtoul(optarg, NULL, 0); - break; - - case 'l': - sl = strtol(optarg, NULL, 0); - break; - - case 'e': - ++use_event; - break; - - case 'g': - gidx = strtol(optarg, NULL, 0); - break; - - default: - usage(argv[0]); - return 1; - } - } - - if (optind == argc - 1) - servername = strdupa(argv[optind]); - else if (optind < argc) { - usage(argv[0]); - return 1; - } - - page_size = sysconf(_SC_PAGESIZE); - - dev_list = ibv_get_device_list(NULL); - if (!dev_list) { - perror("Failed to get IB devices list"); - return 1; - } - - if (!ib_devname) { - ib_dev = *dev_list; - if (!ib_dev) { - fprintf(stderr, "No IB devices found\n"); - return 1; - } - } else { - int i; - for (i = 0; dev_list[i]; ++i) - if (!strcmp(ibv_get_device_name(dev_list[i]), ib_devname)) - break; - ib_dev = dev_list[i]; - if (!ib_dev) { - fprintf(stderr, "IB device %s not found\n", ib_devname); - return 1; - } - } - - ctx = pp_init_ctx(ib_dev, size, rx_depth, ib_port, use_event); - if (!ctx) - return 1; - - routs = pp_post_recv(ctx, ctx->rx_depth); - if (routs < ctx->rx_depth) { - fprintf(stderr, "Couldn't post receive (%d)\n", routs); - return 1; - } - - if (use_event) - if (ibv_req_notify_cq(ctx->cq, 0)) { - fprintf(stderr, "Couldn't request CQ notification\n"); - return 1; - } - - if (pp_get_port_info(ctx->context, ib_port, &ctx->portinfo)) { - fprintf(stderr, "Couldn't get port info\n"); - return 1; - } - my_dest.lid = ctx->portinfo.lid; - - my_dest.qpn = ctx->qp->qp_num; - my_dest.psn = lrand48() & 0xffffff; - - if (gidx >= 0) { - if (ibv_query_gid(ctx->context, ib_port, gidx, &my_dest.gid)) { - fprintf(stderr, "Could not get local gid for gid index " - "%d\n", gidx); - return 1; - } - } else - memset(&my_dest.gid, 0, sizeof my_dest.gid); - - inet_ntop(AF_INET6, &my_dest.gid, gid, sizeof gid); - printf(" local address: LID 0x%04x, QPN 0x%06x, PSN 0x%06x: GID %s\n", - my_dest.lid, my_dest.qpn, my_dest.psn, gid); - - if (servername) - rem_dest = pp_client_exch_dest(servername, port, &my_dest); - else - rem_dest = pp_server_exch_dest(ctx, ib_port, port, sl, - &my_dest, gidx); - - if (!rem_dest) - return 1; - - inet_ntop(AF_INET6, &rem_dest->gid, gid, sizeof gid); - printf(" remote address: LID 0x%04x, QPN 0x%06x, PSN 0x%06x, GID %s\n", - rem_dest->lid, rem_dest->qpn, rem_dest->psn, gid); - - if (servername) - if (pp_connect_ctx(ctx, ib_port, my_dest.psn, sl, rem_dest, - gidx)) - return 1; - - ctx->pending = PINGPONG_RECV_WRID; - - if (servername) { - if (pp_post_send(ctx, rem_dest->qpn)) { - fprintf(stderr, "Couldn't post send\n"); - return 1; - } - ctx->pending |= PINGPONG_SEND_WRID; - } - - if (gettimeofday(&start, NULL)) { - perror("gettimeofday"); - return 1; - } - - rcnt = scnt = 0; - while (rcnt < iters || scnt < iters) { - if (use_event) { - struct ibv_cq *ev_cq; - void *ev_ctx; - - if (ibv_get_cq_event(ctx->channel, &ev_cq, &ev_ctx)) { - fprintf(stderr, "Failed to get cq_event\n"); - return 1; - } - - ++num_cq_events; - - if (ev_cq != ctx->cq) { - fprintf(stderr, "CQ event for unknown CQ %p\n", ev_cq); - return 1; - } - - if (ibv_req_notify_cq(ctx->cq, 0)) { - fprintf(stderr, "Couldn't request CQ notification\n"); - return 1; - } - } - - { - struct ibv_wc wc[2]; - int ne, i; - - do { - ne = ibv_poll_cq(ctx->cq, 2, wc); - if (ne < 0) { - fprintf(stderr, "poll CQ failed %d\n", ne); - return 1; - } - } while (!use_event && ne < 1); - - for (i = 0; i < ne; ++i) { - if (wc[i].status != IBV_WC_SUCCESS) { - fprintf(stderr, "Failed status %s (%d) for wr_id %d\n", - ibv_wc_status_str(wc[i].status), - wc[i].status, (int) wc[i].wr_id); - return 1; - } - - switch ((int) wc[i].wr_id) { - case PINGPONG_SEND_WRID: - ++scnt; - break; - - case PINGPONG_RECV_WRID: - if (--routs <= 1) { - routs += pp_post_recv(ctx, ctx->rx_depth - routs); - if (routs < ctx->rx_depth) { - fprintf(stderr, - "Couldn't post receive (%d)\n", - routs); - return 1; - } - } - - ++rcnt; - break; - - default: - fprintf(stderr, "Completion for unknown wr_id %d\n", - (int) wc[i].wr_id); - return 1; - } - - ctx->pending &= ~(int) wc[i].wr_id; - if (scnt < iters && !ctx->pending) { - if (pp_post_send(ctx, rem_dest->qpn)) { - fprintf(stderr, "Couldn't post send\n"); - return 1; - } - ctx->pending = PINGPONG_RECV_WRID | - PINGPONG_SEND_WRID; - } - } - } - } - - if (gettimeofday(&end, NULL)) { - perror("gettimeofday"); - return 1; - } - - { - float usec = (end.tv_sec - start.tv_sec) * 1000000 + - (end.tv_usec - start.tv_usec); - long long bytes = (long long) size * iters * 2; - - printf("%lld bytes in %.2f seconds = %.2f Mbit/sec\n", - bytes, usec / 1000000., bytes * 8. / usec); - printf("%d iters in %.2f seconds = %.2f usec/iter\n", - iters, usec / 1000000., usec / iters); - } - - ibv_ack_cq_events(ctx->cq, num_cq_events); - - if (pp_close_ctx(ctx)) - return 1; - - ibv_free_device_list(dev_list); - free(rem_dest); - - return 0; -} |