[src/trunk]: src/sys/rump/net/rumptest print mbuf statistics a few times. in...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/13492c488db2
branches:  trunk
changeset: 750813:13492c488db2
user:      pooka <pooka%NetBSD.org@localhost>
date:      Fri Jan 15 18:38:16 2010 +0000

description:
print mbuf statistics a few times.  incidentally, can be used to
test percpu.

diffstat:

 sys/rump/net/rumptest/rumptest_net.c |  38 ++++++++++++++++++++++++++++++++++-
 1 files changed, 36 insertions(+), 2 deletions(-)

diffs (82 lines):

diff -r 234843c29e82 -r 13492c488db2 sys/rump/net/rumptest/rumptest_net.c
--- a/sys/rump/net/rumptest/rumptest_net.c      Fri Jan 15 15:05:02 2010 +0000
+++ b/sys/rump/net/rumptest/rumptest_net.c      Fri Jan 15 18:38:16 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rumptest_net.c,v 1.12 2009/10/20 00:25:26 pooka Exp $  */
+/*     $NetBSD: rumptest_net.c,v 1.13 2010/01/15 18:38:16 pooka Exp $  */
 
 /*
  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
@@ -28,9 +28,11 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mbuf.h>
 #include <sys/time.h>
 #include <sys/sockio.h>
+#include <sys/sysctl.h>
 
 #include <arpa/inet.h>
 #include <net/if.h>
@@ -44,6 +46,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #define DEST_ADDR "204.152.190.12"     /* www.NetBSD.org */
 #define DEST_PORT 80                   /* take a wild guess */
@@ -163,6 +166,30 @@
 }
 #endif /* FULL_NETWORK_STACK */
 
+static void
+printstats(void)
+{
+       struct mbstat mbstat;
+       int ctl[] = { CTL_KERN, KERN_MBUF, MBUF_STATS };
+       int totalmbuf = 0;
+       size_t mbslen = sizeof(struct mbstat);
+       unsigned i;
+
+       if (rump_sys___sysctl(ctl, __arraycount(ctl), &mbstat, &mbslen,
+           NULL, 0) == -1)
+               return;
+
+       printf("  mbuf count:\n");
+       for (i = 0; i < __arraycount(mbstat.m_mtypes); i++) {
+               if (mbstat.m_mtypes[i] == 0)
+                       continue;
+               printf("%s (%d) mbuf count %d\n",
+                   i == MT_DATA ? "data" : "unknown", i, mbstat.m_mtypes[i]);
+               totalmbuf += mbstat.m_mtypes[i];
+       }
+       printf("total mbufs: %d\n", totalmbuf);
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -199,6 +226,8 @@
                err(1, "connect failed");
        }
 
+       printstats();
+
        printf("connected\n");
 
        strcpy(buf, "GET / HTTP/1.0\n\n");
@@ -206,6 +235,11 @@
        if (n != (ssize_t)strlen(buf))
                err(1, "wrote only %zd vs. %zu\n",
                    n, strlen(buf));
+
+       /* wait for mbufs to accumulate.  hacky, but serves purpose.  */
+       sleep(1);
+       printstats();
+       sleep(1);
        
        memset(buf, 0, sizeof(buf));
        for (off = 0; off < sizeof(buf) && n > 0;) {