[gpfsug-discuss] mmfsadm dump vfsstats - negative values
IBM Spectrum Scale
scale at us.ibm.com
Thu Apr 20 01:10:51 BST 2017
Bob,
I also noticed this recently. I think it may be a simple matter of a
printf()-like statement in the code that handles "mmfsadm vfsstats" using
an incorrect conversion specifier --- one that treats the counter as
signed instead of unsigned and treats the counter as being smaller than it
really is.
To help confirm that hypothesis, could you please run the following
commands on the node, at the same time, so the output can be compared:
# mmfsadm vfsstats
# mmfsadm eventsExporter mmpmon vfss
I believe the code that handles "mmfsadm eventsExporter mmpmon vfss" uses
the correct printf()-like conversion specifier. So, it should so good
numbers where "mmfsadm vfsstats" shows negative numbers.
Regards, The Spectrum Scale (GPFS) team
Eric Agar
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From: "Oesterlin, Robert" <Robert.Oesterlin at nuance.com>
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: 04/19/2017 07:16 PM
Subject: [gpfsug-discuss] mmfsadm dump vfsstats - negative values
Sent by: gpfsug-discuss-bounces at spectrumscale.org
I assume the counter has wrapped on some of these - would a PMR fix this?
(4.2.1)
[root at cnt-r01r07u15 ~]# mmfsadm vfsstats
vfs statistics currently enabled
started at: Fri Jan 27 16:22:02.702 2017
duration: 7091405.800 sec
name calls time per call total time
-------------------- -------- -------------- --------------
access 8472691 0.006672 56529.863993
close 1460175509 0.000034 49854.695358
create 2101110 0.073797 155055.263775
fsync 20 0.001214 0.024288
getattr 859449161 0.000118 101183.699413
link 2175473 0.000287 625.343799
lockctl 17326 0.000302 5.229828
lookup 200369809 0.005999 1201980.046683
map_lloff 220850355 0.000039 8561.791963
mkdir 817894 0.265793 217390.095681
mknod 3 0.000474 0.001422
open 1460169409 0.000092 134811.724068
read -412143552 0.001023 3971403.879911
write 164739329 0.000829 136616.948900
mmapRead 17108252 0.000623 10665.877349
readdir 142261835 0.000049 6999.159121
readlink 485335656 0.000004 2111.627292
readpage -648839570 0.000004 14346.195128
remove 4239806 0.022000 93277.124289
rename 350671 0.055135 19334.226490
rmdir 342019 0.008000 2736.037074
setattr 3709237 0.004573 16963.899331
symlink 160610 0.053061 8522.185175
unmap -365476297 0.000000 1735.669373
setxattr 119 0.000009 0.001042
getxattr -218316996 0.000154 628416.355002
removexattr 15 0.000003 0.000042
statfs 2624067 0.000082 214.306646
fastOpen 1456944934 0.000000 0.000000
fastClose 1515612004 0.000000 0.000000
fastLookup 77981387 0.000000 0.000000
fastRead -922882405 0.000000 0.000000
fastWrite 102606402 0.000000 0.000000
revalidate 899677 0.000000 0.000000
aio write sync 21331080 0.000061 1309.773528
Bob Oesterlin
Sr Principal Storage Engineer, Nuance
507-269-0413
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