Date: Tue, 28 Nov 2000 15:31:29 -0600 From: Dan Nelson <dnelson@emsphone.com> To: John Baldwin <jhb@FreeBSD.ORG> Cc: hackers@FreeBSD.ORG Subject: Re: Fixes to top(1) to use the full width of the screen for p_comm Message-ID: <20001128153129.A1447@dan.emsphone.com> In-Reply-To: <XFMail.001128124312.jhb@FreeBSD.org>; from "John Baldwin" on Tue Nov 28 12:43:12 GMT 2000 References: <XFMail.001128124312.jhb@FreeBSD.org>
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In the last episode (Nov 28), John Baldwin said:
> Hey gang,
>
> One of my favorite tools to use during the SMPng stuff is top(1) as I
> get to see all the Happy Little Processes bouncing around on CPU's
> and getting stuck in SMTX, etc.
On a related note, here's a little patch to top that digs around and
tells you what mutex a process is waiting on. It replaces "MUTEX" with
"M######", where "######" is the first 6 characters of the mutex name
passed to mtx_init. At the moment all I see is "MGiant" all over the
place, but hopefully that'll change soon :)
--
Dan Nelson
dnelson@emsphone.com
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Index: machine.c
===================================================================
RCS file: /home/ncvs/src/usr.bin/top/machine.c,v
retrieving revision 1.30
diff -b -u -p -r1.30 machine.c
--- machine.c 2000/09/07 01:32:38 1.30
+++ machine.c 2000/11/22 15:21:10
@@ -587,6 +587,19 @@ char *(*get_userid)();
else
strcpy(status, "RUN");
break;
+ case SMTX:
+ if (PP(pp, p_blocked) != NULL)
+ {
+ struct mtx mt;
+ char descr[80];
+ getkval(PP(pp,p_blocked), &mt, sizeof(mt), "!");
+ getkval(mt.mtx_description, descr, 80, "!");
+ sprintf(status, "M%.6s", descr);
+ } else
+ {
+ sprintf(status, "MUTEX");
+ }
+ break;
case SSLEEP:
if (PP(pp, p_wmesg) != NULL) {
sprintf(status, "%.6s", EP(pp, e_wmesg));
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