On Mon, 3 Dec 2007, Andrew Thompson wrote:
I would like to give some feedback. I listed the threads of proc 12 which
is intr,
# procstat -t 12
PID TID COMM CPU PRI STATE WCHAN
12 100003 intr 0 40 wait -
12 100004 intr 0 52 wait -
12 100030 intr 0 16 wait -
[...]
12 100036 intr 0 36 wait -
12 100037 intr 0 24 wait -
I had expected it to show the thread name such as 'irq14: ata0', is this
possible (and a good thing to do)?
I just print out the 'comm' field returned by the generic sysctl, and I
notice that top(1) with -S is now having the same problem as procstat(1). I
think this is a kernel bug in how we initialize or otherwise handle thread
names, and fairly recent, as it's not present on my 7.0BETA2 box. If I had
to guess, it's that these are now 'true threads' under the single 'intr'
proc, and that we're not exporting the thread name?
Changing to ki_ocomm gets the desired result for single and multithreaded
processes.
I wonder if we should be renaming ki_ocomm to ki_tdcomm or ki_tdname?
Robert N M Watson
Computer Laboratory
University of Cambridge
Andrew
Index: procstat_threads.c
===================================================================
RCS file: /home/ncvs/src/usr.bin/procstat/procstat_threads.c,v
retrieving revision 1.1
diff -u -p -r1.1 procstat_threads.c
--- procstat_threads.c 2 Dec 2007 23:31:45 -0000 1.1
+++ procstat_threads.c 3 Dec 2007 06:06:46 -0000
@@ -82,8 +82,8 @@ procstat_threads(pid_t pid, struct kinfo
kipp = &kip[i];
printf("%5d ", pid);
printf("%6d ", kipp->ki_tid);
- printf("%-20s ", strlen(kipp->ki_comm) ?
- kipp->ki_comm : "-");
+ printf("%-20s ", strlen(kipp->ki_ocomm) ?
+ kipp->ki_ocomm : "-");
if (kipp->ki_oncpu != 255)
printf("%3d ", kipp->ki_oncpu);
else if (kipp->ki_lastcpu != 255)
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