This is a simple little syslink test program which ping-pongs a 64K
authorMatthew Dillon <dillon@dragonflybsd.org>
Fri, 29 Jun 2007 17:18:42 +0000 (17:18 +0000)
committerMatthew Dillon <dillon@dragonflybsd.org>
Fri, 29 Jun 2007 17:18:42 +0000 (17:18 +0000)
buffer around.

test/syslink/test2.c [new file with mode: 0644]

diff --git a/test/syslink/test2.c b/test/syslink/test2.c
new file mode 100644 (file)
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+/*
+ * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
+ * 
+ * This code is derived from software contributed to The DragonFly Project
+ * by Matthew Dillon <dillon@backplane.com>
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of The DragonFly Project nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific, prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * $DragonFly: src/test/syslink/test2.c,v 1.1 2007/06/29 17:18:42 dillon Exp $
+ */
+#include <sys/types.h>
+#include <sys/syslink.h>
+#include <sys/syslink_msg.h>
+#include <sys/mman.h>
+#include <sys/uio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+static void reader(int fd);
+static void writer(int fd);
+
+#define BUFSIZE        65536
+
+int
+main(int ac, char **av)
+{
+       union syslink_info_all info;
+       int fd1;
+       int fd2;
+
+       bzero(&info, sizeof(info));
+       if (syslink(SYSLINK_CMD_NEW, &info.head, sizeof(info)) < 0) {
+               perror("syslink");
+               exit(1);
+       }
+       printf("fds %d %d\n", info.cmd_new.fds[0], info.cmd_new.fds[1]);
+       if (fork() == 0) {
+               reader(info.cmd_new.fds[0]);
+       } else {
+               writer(info.cmd_new.fds[1]);
+       }
+       while (wait(NULL) > 0)
+               ;
+       return(0);
+}
+
+static
+void
+writer(int fd)
+{
+       union syslink_small_msg cmd;
+       union syslink_small_msg rep;
+       int *dmabuf;
+       int n;
+       int waitforit = 10;
+       off_t bytes = 0;
+
+       dmabuf = mmap(NULL, BUFSIZE, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0);
+
+       bzero(&cmd, sizeof(cmd));
+       cmd.msg.sm_bytes = sizeof(struct syslink_msg);
+       cmd.msg.sm_proto = SMPROTO_BSDVFS;
+       cmd.msg.sm_msgid = 1;
+       cmd.msg.sm_head.se_cmd = 0 | SE_CMDF_DMAR | SE_CMDF_DMAW;
+       cmd.msg.sm_head.se_bytes = sizeof(cmd.msg.sm_head);
+       dmabuf[0] = 0;
+       dmabuf[4095] = 0;
+       for (;;) {
+               struct iovec iov[2];
+
+               iov[0].iov_base = (char *)&cmd;
+               iov[0].iov_len = cmd.msg.sm_bytes;
+               iov[1].iov_base = (char *)dmabuf;
+               iov[1].iov_len = BUFSIZE;
+               if (dmabuf[0] < 0)
+                       --dmabuf[0];
+               else
+                       ++dmabuf[0];
+               --dmabuf[4095];
+               /*printf("write n = %d dmabuf[0] = %d\n", n, dmabuf[0]);*/
+               n = writev(fd, iov, 2);
+               bytes += BUFSIZE;
+               if (bytes % (1024 * 1024 * 1024) == 0) {
+                       printf("%lld\r", bytes);
+                       fflush(stdout);
+               }
+               if (n < 0) {
+                       printf("write error %s\n", strerror(errno));
+               } else if (waitforit) {
+                       /* fake up a pipeline */
+                       --waitforit;
+               } else {
+                       n = read(fd, &rep, sizeof(rep));
+                       /*printf("read-reply %d %lld dmabuf[0] = %d\n",
+                               n, rep.msg.sm_msgid, dmabuf[0]);*/
+               }
+               ++cmd.msg.sm_msgid;
+       }
+}
+
+static
+void
+reader(int fd)
+{
+       union syslink_small_msg cmd;
+       union syslink_small_msg rep;
+       int *dmabuf;
+       int n;
+
+       dmabuf = mmap(NULL, BUFSIZE, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0);
+
+       bzero(&rep, sizeof(rep));
+       rep.msg.sm_bytes = sizeof(struct syslink_msg);
+       rep.msg.sm_proto = SMPROTO_BSDVFS | SM_PROTO_REPLY;
+       rep.msg.sm_head.se_cmd = SE_CMDF_REPLY;
+       rep.msg.sm_head.se_bytes = sizeof(rep.msg.sm_head);
+
+       for (;;) {
+               struct iovec iov[2];
+
+               iov[0].iov_base = (char *)&cmd;
+               iov[0].iov_len = sizeof(cmd);
+               iov[1].iov_base = (char *)dmabuf;
+               iov[1].iov_len = BUFSIZE;
+
+               n = readv(fd, iov, 2);
+               if (n < 0 && errno == ENOSPC) {
+                       printf("no space\n");
+                       exit(1);
+               }
+               if (n < 0) {
+                       printf("read error %s\n", strerror(errno));
+               } else {
+                       /*printf("read  n = %d dmabuf[0] = %d [4095] = %d\n", 
+                               n, dmabuf[0], dmabuf[4095]);*/
+                       rep.msg.sm_msgid = cmd.msg.sm_msgid;
+                       dmabuf[0] = -dmabuf[0];
+                       iov[0].iov_base = (char *)&rep;
+                       iov[0].iov_len = rep.msg.sm_bytes;
+                       /*n = write(fd, &rep, rep.msg.sm_bytes);*/
+                       n = writev(fd, iov, 2);
+                       if (n < 0) {
+                               printf("reply error %s\n", strerror(errno));
+                       }
+               }
+               if (n < 0)
+                       break;
+               /*sleep(1);*/
+       }
+}
+