--- /dev/null
+/*
+ * 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.
+ *
+ * $Id$
+ */
+
+#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 <sysfs/libsysfs.h>
+
+#include <infiniband/verbs.h>
+
+enum {
+ PINGPONG_RECV_WRID = 1,
+ PINGPONG_SEND_WRID = 2,
+
+ MAX_QP = 256,
+};
+
+static int page_size;
+
+struct pingpong_context {
+ struct ibv_context *context;
+ struct ibv_pd *pd;
+ struct ibv_mr *mr;
+ struct ibv_cq *cq;
+ struct ibv_srq *srq;
+ struct ibv_qp *qp[MAX_QP];
+ void *buf;
+ int size;
+ int num_qp;
+ int rx_depth;
+};
+
+struct pingpong_dest {
+ int lid;
+ int qpn;
+ int psn;
+};
+
+static uint16_t pp_get_local_lid(struct pingpong_context *ctx, int port)
+{
+ struct ibv_port_attr attr;
+
+ if (ibv_query_port(ctx->context, port, &attr))
+ return 0;
+
+ return attr.lid;
+}
+
+static int pp_connect_ctx(struct pingpong_context *ctx, int port,
+ const struct pingpong_dest *my_dest,
+ const struct pingpong_dest *dest)
+{
+ int i;
+
+ for (i = 0; i < ctx->num_qp; ++i) {
+ struct ibv_qp_attr attr = {
+ .qp_state = IBV_QPS_RTR,
+ .path_mtu = IBV_MTU_1024,
+ .dest_qp_num = dest[i].qpn,
+ .rq_psn = dest[i].psn,
+ .max_dest_rd_atomic = 1,
+ .min_rnr_timer = 12,
+ .ah_attr = {
+ .is_global = 0,
+ .dlid = dest[i].lid,
+ .sl = 0,
+ .src_path_bits = 0,
+ .port_num = port
+ }
+ };
+ if (ibv_modify_qp(ctx->qp[i], &attr,
+ IBV_QP_STATE |
+ IBV_QP_AV |
+ IBV_QP_PATH_MTU |
+ IBV_QP_DEST_QPN |
+ IBV_QP_RQ_PSN |
+ IBV_QP_MAX_DEST_RD_ATOMIC |
+ IBV_QP_MIN_RNR_TIMER)) {
+ fprintf(stderr, "Failed to modify QP[%d] to RTR\n", i);
+ return 1;
+ }
+
+ attr.qp_state = IBV_QPS_RTS;
+ attr.timeout = 14;
+ attr.retry_cnt = 7;
+ attr.rnr_retry = 7;
+ attr.sq_psn = my_dest[i].psn;
+ attr.max_rd_atomic = 1;
+ if (ibv_modify_qp(ctx->qp[i], &attr,
+ IBV_QP_STATE |
+ IBV_QP_TIMEOUT |
+ IBV_QP_RETRY_CNT |
+ IBV_QP_RNR_RETRY |
+ IBV_QP_SQ_PSN |
+ IBV_QP_MAX_QP_RD_ATOMIC)) {
+ fprintf(stderr, "Failed to modify QP[%d] to RTS\n", i);
+ 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"];
+ int n;
+ int r;
+ int i;
+ int sockfd = -1;
+ struct pingpong_dest *rem_dest = NULL;
+
+ asprintf(&service, "%d", port);
+ n = getaddrinfo(servername, service, &hints, &res);
+
+ if (n < 0) {
+ fprintf(stderr, "%s for %s:%d\n", gai_strerror(n), servername, port);
+ 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);
+
+ if (sockfd < 0) {
+ fprintf(stderr, "Couldn't connect to %s:%d\n", servername, port);
+ return NULL;
+ }
+
+ for (i = 0; i < MAX_QP; ++i) {
+ sprintf(msg, "%04x:%06x:%06x", my_dest[i].lid, my_dest[i].qpn, my_dest[i].psn);
+ if (write(sockfd, msg, sizeof msg) != sizeof msg) {
+ fprintf(stderr, "Couldn't send local address\n");
+ goto out;
+ }
+ }
+
+ rem_dest = malloc(MAX_QP * sizeof *rem_dest);
+ if (!rem_dest)
+ goto out;
+
+ for (i = 0; i < MAX_QP; ++i) {
+ n = 0;
+ while (n < sizeof msg) {
+ r = read(sockfd, msg + n, sizeof msg - n);
+ if (r < 0) {
+ perror("client read");
+ fprintf(stderr, "%d/%d: Couldn't read remote address [%d]\n",
+ n, (int) sizeof msg, i);
+ goto out;
+ }
+ n += r;
+ }
+
+ sscanf(msg, "%x:%x:%x",
+ &rem_dest[i].lid, &rem_dest[i].qpn, &rem_dest[i].psn);
+ }
+
+ write(sockfd, "done", sizeof "done");
+
+out:
+ close(sockfd);
+ return rem_dest;
+}
+
+static struct pingpong_dest *pp_server_exch_dest(struct pingpong_context *ctx,
+ int ib_port, int port,
+ const struct pingpong_dest *my_dest)
+{
+ 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"];
+ int n;
+ int r;
+ int i;
+ int sockfd = -1, connfd;
+ struct pingpong_dest *rem_dest = NULL;
+
+ asprintf(&service, "%d", port);
+ n = getaddrinfo(NULL, service, &hints, &res);
+
+ if (n < 0) {
+ fprintf(stderr, "%s for port %d\n", gai_strerror(n), port);
+ 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);
+
+ 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;
+ }
+
+ rem_dest = malloc(MAX_QP *sizeof *rem_dest);
+ if (!rem_dest)
+ goto out;
+
+ for (i = 0; i < MAX_QP; ++i) {
+ n = 0;
+ while (n < sizeof msg) {
+ r = read(connfd, msg + n, sizeof msg - n);
+ if (r < 0) {
+ perror("server read");
+ fprintf(stderr, "%d/%d: Couldn't read remote address [%d]\n",
+ n, (int) sizeof msg, i);
+ goto out;
+ }
+ n += r;
+ }
+
+ sscanf(msg, "%x:%x:%x",
+ &rem_dest[i].lid, &rem_dest[i].qpn, &rem_dest[i].psn);
+ }
+
+ if (pp_connect_ctx(ctx, ib_port, my_dest, rem_dest)) {
+ fprintf(stderr, "Couldn't connect to remote QP\n");
+ free(rem_dest);
+ rem_dest = NULL;
+ goto out;
+ }
+
+ for (i = 0; i < MAX_QP; ++i) {
+ sprintf(msg, "%04x:%06x:%06x", my_dest[i].lid, my_dest[i].qpn, my_dest[i].psn);
+ 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 num_qp, int rx_depth, int port)
+{
+ struct pingpong_context *ctx;
+ int i;
+
+ ctx = malloc(sizeof *ctx);
+ if (!ctx)
+ return NULL;
+
+ ctx->size = size;
+ ctx->num_qp = num_qp;
+ ctx->rx_depth = rx_depth;
+
+ ctx->buf = memalign(page_size, size);
+ if (!ctx->buf) {
+ fprintf(stderr, "Couldn't allocate work buf.\n");
+ return NULL;
+ }
+
+ memset(ctx->buf, 0, size);
+
+ 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));
+ return NULL;
+ }
+
+ ctx->pd = ibv_alloc_pd(ctx->context);
+ if (!ctx->pd) {
+ fprintf(stderr, "Couldn't allocate PD\n");
+ return NULL;
+ }
+
+ ctx->mr = ibv_reg_mr(ctx->pd, ctx->buf, size, IBV_ACCESS_LOCAL_WRITE);
+ if (!ctx->mr) {
+ fprintf(stderr, "Couldn't allocate MR\n");
+ return NULL;
+ }
+
+ ctx->cq = ibv_create_cq(ctx->context, rx_depth + 1, NULL);
+ if (!ctx->cq) {
+ fprintf(stderr, "Couldn't create CQ\n");
+ return NULL;
+ }
+
+ {
+ struct ibv_srq_init_attr attr = {
+ .attr = {
+ .max_wr = rx_depth,
+ .max_sge = 1
+ }
+ };
+
+ ctx->srq = ibv_create_srq(ctx->pd, &attr);
+ if (!ctx->srq) {
+ fprintf(stderr, "Couldn't create SRQ\n");
+ return NULL;
+ }
+ }
+
+ for (i = 0; i < num_qp; ++i) {
+ struct ibv_qp_init_attr attr = {
+ .send_cq = ctx->cq,
+ .recv_cq = ctx->cq,
+ .srq = ctx->srq,
+ .cap = {
+ .max_send_wr = 4,
+ .max_send_sge = 1,
+ },
+ .qp_type = IBV_QPT_RC
+ };
+
+ ctx->qp[i] = ibv_create_qp(ctx->pd, &attr);
+ if (!ctx->qp[i]) {
+ fprintf(stderr, "Couldn't create QP[%d]\n", i);
+ return NULL;
+ }
+ }
+
+ for (i = 0; i < num_qp; ++i) {
+ struct ibv_qp_attr attr;
+
+ attr.qp_state = IBV_QPS_INIT;
+ attr.pkey_index = 0;
+ attr.port_num = port;
+ attr.qp_access_flags = 0;
+
+ if (ibv_modify_qp(ctx->qp[i], &attr,
+ IBV_QP_STATE |
+ IBV_QP_PKEY_INDEX |
+ IBV_QP_PORT |
+ IBV_QP_ACCESS_FLAGS)) {
+ fprintf(stderr, "Failed to modify QP[%d] to INIT\n", i);
+ return NULL;
+ }
+ }
+
+ return ctx;
+}
+
+static int pp_post_recv(struct pingpong_context *ctx, int n)
+{
+ struct ibv_sge list = {
+ .addr = (uintptr_t) ctx->buf,
+ .length = ctx->size,
+ .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_srq_recv(ctx->srq, &wr, &bad_wr))
+ break;
+
+ return i;
+}
+
+static int pp_post_send(struct pingpong_context *ctx, int qp_index)
+{
+ struct ibv_sge list = {
+ .addr = (uintptr_t) ctx->buf,
+ .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 = IBV_SEND_SIGNALED,
+ };
+ struct ibv_send_wr *bad_wr;
+
+ return ibv_post_send(ctx->qp[qp_index], &wr, &bad_wr);
+}
+
+static int find_qp(int qpn, struct pingpong_context *ctx, int num_qp)
+{
+ int i;
+
+ for (i = 0; i < num_qp; ++i)
+ if (ctx->qp[i]->qp_num == qpn)
+ return i;
+
+ return -1;
+}
+
+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 4096)\n");
+ printf(" -q, --num-qp=<num> number of QPs to use (default 16)\n");
+ printf(" -r, --rx-depth=<dep> number of receives to post at a time (default 500)\n");
+ printf(" -n, --iters=<iters> number of exchanges per QP(default 1000)\n");
+ printf(" -e, --events sleep on CQ events (default poll)\n");
+}
+
+int main(int argc, char *argv[])
+{
+ struct dlist *dev_list;
+ struct ibv_device *ib_dev;
+ struct pingpong_context *ctx;
+ struct pingpong_dest my_dest[MAX_QP];
+ struct pingpong_dest *rem_dest;
+ struct timeval start, end;
+ char *ib_devname = NULL;
+ char *servername = NULL;
+ int port = 18515;
+ int ib_port = 1;
+ int size = 4096;
+ int num_qp = 16;
+ int rx_depth = 500;
+ int iters = 1000;
+ int use_event = 0;
+ int routs;
+ int rcnt, scnt;
+ int i;
+
+ 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 = "num-qp", .has_arg = 1, .val = 'q' },
+ { .name = "rx-depth", .has_arg = 1, .val = 'r' },
+ { .name = "iters", .has_arg = 1, .val = 'n' },
+ { .name = "events", .has_arg = 0, .val = 'e' },
+ { 0 }
+ };
+
+ c = getopt_long(argc, argv, "p:d:i:s:q:r:n:e", long_options, NULL);
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'p':
+ port = strtol(optarg, NULL, 0);
+ if (port < 0 || 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 < 0) {
+ usage(argv[0]);
+ return 1;
+ }
+ break;
+
+ case 's':
+ size = strtol(optarg, NULL, 0);
+ break;
+
+ case 'q':
+ num_qp = strtol(optarg, NULL, 0);
+ break;
+
+ case 'r':
+ rx_depth = strtol(optarg, NULL, 0);
+ break;
+
+ case 'n':
+ iters = strtol(optarg, NULL, 0);
+ break;
+
+ case 'e':
+ ++use_event;
+ 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_devices();
+
+ dlist_start(dev_list);
+ if (!ib_devname) {
+ ib_dev = dlist_next(dev_list);
+ if (!ib_dev) {
+ fprintf(stderr, "No IB devices found\n");
+ return 1;
+ }
+ } else {
+ dlist_for_each_data(dev_list, ib_dev, struct ibv_device)
+ if (!strcmp(ibv_get_device_name(ib_dev), ib_devname))
+ break;
+ if (!ib_dev) {
+ fprintf(stderr, "IB device %s not found\n", ib_devname);
+ return 1;
+ }
+ }
+
+ ctx = pp_init_ctx(ib_dev, size, num_qp, rx_depth, ib_port);
+ 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;
+ }
+
+ for (i = 0; i < num_qp; ++i) {
+ my_dest[i].qpn = ctx->qp[i]->qp_num;
+ my_dest[i].psn = lrand48() & 0xffffff;
+ my_dest[i].lid = pp_get_local_lid(ctx, ib_port);
+ if (!my_dest[i].lid) {
+ fprintf(stderr, "Couldn't get local LID\n");
+ return 1;
+ }
+
+ printf(" local address: LID 0x%04x, QPN 0x%06x, PSN 0x%06x\n",
+ my_dest[i].lid, my_dest[i].qpn, my_dest[i].psn);
+ }
+
+ if (servername)
+ rem_dest = pp_client_exch_dest(servername, port, my_dest);
+ else
+ rem_dest = pp_server_exch_dest(ctx, ib_port, port, my_dest);
+
+ if (!rem_dest)
+ return 1;
+
+ for (i = 0; i < num_qp; ++i)
+ printf(" remote address: LID 0x%04x, QPN 0x%06x, PSN 0x%06x\n",
+ rem_dest[i].lid, rem_dest[i].qpn, rem_dest[i].psn);
+
+ if (servername)
+ if (pp_connect_ctx(ctx, ib_port, my_dest, rem_dest))
+ return 1;
+
+ if (use_event)
+ if (ibv_req_notify_cq(ctx->cq, 0)) {
+ fprintf(stderr, "Couldn't request CQ notification\n");
+ return 1;
+ }
+
+ if (servername)
+ for (i = 0; i < num_qp; ++i)
+ if (pp_post_send(ctx, i)) {
+ fprintf(stderr, "Couldn't post send\n");
+ return 1;
+ }
+
+ 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->context, 0, &ev_cq, &ev_ctx)) {
+ fprintf(stderr, "Failed to get cq_event\n");
+ return 1;
+ }
+
+ 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, j;
+
+ do {
+ ne = ibv_poll_cq(ctx->cq, 2, wc);
+ } while (!use_event && ne < 1);
+
+ if (ne < 0) {
+ fprintf(stderr, "poll CQ failed %d\n", ne);
+ return 1;
+ }
+
+ for (i = 0; i < ne; ++i) {
+ if (wc[i].status != IBV_WC_SUCCESS) {
+ fprintf(stderr, "Failed status %d for wr_id %d\n",
+ 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;
+ }
+ }
+
+ if (scnt < iters) {
+ j = find_qp(wc[i].qp_num, ctx, num_qp);
+ if (j < 0) {
+ fprintf(stderr, "Couldn't find QPN %06x\n",
+ wc[i].qp_num);
+ return 1;
+ }
+
+ if (pp_post_send(ctx, j)) {
+ fprintf(stderr, "Couldn't post send\n");
+ return 1;
+ }
+ }
+
+ ++rcnt;
+ break;
+
+ default:
+ fprintf(stderr, "Completion for unknown wr_id %d\n",
+ (int) wc[i].wr_id);
+ return 1;
+ }
+ }
+ }
+ }
+
+ 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);
+ }
+
+ return 0;
+}
projects / ~shefty / libibverbs.git / commitdiff