Re: [pcp] proc.psinfo.stime

[Mark Goodwin <mgoodwin@xxxxxxxxxx>]

On 12/30/2012 05:41 PM, Chandana De Silva wrote:
> pmval -r -i 3008 proc.psinfo.stime
Hi Chandana, it's not working for me either, e.g. :

$ while true; do date >/dev/null; done &
[3] 3266

$ pmval -r -i 3266 proc.psinfo.stime

metric:    proc.psinfo.stime
host:      localhost
semantics: cumulative counter
units:     millisec
samples:   all

                 3266
 18446744073696892616
 18446744073696875616
 18446744073696859616
 18446744073696843616
 18446744073696828616
 18446744073696813616

I'll check the code - the metric item number is supposed to correspond
to the field number (counting from 0) in /proc/PID/stat. Maybe that has
come to grief or something or there is an error or overflow in the
conversion from jiffies to milliseconds.

$ pminfo -m proc.psinfo.stime
proc.psinfo.stime PMID: 3.8.14
                  ----------^^

$ awk '{print $15}' /proc/3266/stat
18952
$ awk '{print $15}' /proc/3266/stat
19015

So the exported values fro mthe kernel look sane, but the values reported
by pmval look suspiciously like they've wrapped :

$ bc -q
obase=16
18446744073696813616
FFFFFFFFFF3DA230

I'll investigate some more ...

Regards
-- Mark