can someone tell me the meaning of this commnad,
If you want to see a grand total of CPU time for a program when it finishes running, you can use the time command. At the Unix prompt, enter:
time java myprog
Replace myprog with the name of the program you are running. The following is an... (2 Replies)
Hi all,
Can someone extending on what the time field is explaining in a ps command.
Man page only has this:
time The cumulative execution time for the process.
Is this a combined CPU time? if that is the case then it should be impossible to have a 00:00 time on any process.
... (1 Reply)
Process start time is not showing the correct time:
I had started a process on Jun 17th at 23:30:00.
Next day morning when I run the command "ps -ef | grep mq", the process is showing the start date of Jun 17th but the start time is 00:16:41
Day/Date is setup correctly on the server.
It... (2 Replies)
Hi,
I have a file that has data in it that says
00:01:48.233 1212
00:01:56.233 345
00:09:01.221 5678
00:12:23.321 93444
The file has more line than this but i just wanted to put in a snippet to ask how I would get the highest number with time stamp into another file. So from the above... (2 Replies)
Hi,
I have 2 queries
1 .when I run some unix command, I am getting the output of "time" at std output (screen)
for eg
zegrep <pattern> *.v.gz
I almost found the reason but not sure, if the no of files matching *.v.gz is more then I am getting the time command output at the... (5 Replies)
Hi All
I am trying to run a script in linux wherein i have a command like this
grep ^prmAttunityUser= djpHewr2XFMAttunitySetup_ae1_tmp
djpHewr2XFMAttunitySetup_ae1_tmp is a temporary file in which the user value is stored but this command in the script returns me balnk value whereas it has a... (4 Replies)
Hi All,
I am listing the files which are 4 hours older. For this first I have creted a dummy file with the 4 hours before timestamp, then I am using the below find command,
find /path/ -type f ! -newer 4_hours_oledr_file -exec ls -lrt {} \;
I am getting the files which are older than... (13 Replies)
Hi Folks,
I have a situation here, where no command is giving any output, and it's not even showing any error message also.
What could be the reason? (3 Replies)
Hello, I want to run a field from an awk command through a command in bash.
For example my input file is
1,2,3
20,30,40
60,70,80
I want tot run $2 thought the command
date +%d/%m/%y -d"01/01/15 + $2 days -1 day"
and get the output
1,02/01/15,3
20,30/01/15,40
60,11/03/15,80
... (2 Replies)
I am measuring the time it takes for a wget command to complete.
Right now my command is:
time wget https://`ifconfig -a | grep '32.29.120' | cut -d: -f2 | cut -d' ' -f1`:8443/primary-rest/shop?brandId=test --header="name: test" --no-check-certificate -o SELF_TEST.log
The output I get is ... (2 Replies)
Discussion started by: Junaid Subhani
2 Replies
LEARN ABOUT MOJAVE
iosnoop
iosnoop(1m) USER COMMANDS iosnoop(1m)NAME
iosnoop - snoop I/O events as they occur. Uses DTrace.
SYNOPSIS
iosnoop [-a|-A|-Deghinostv] [-d device] [-f filename] [-m mount_point] [-n name] [-p PID]
DESCRIPTION
iosnoop prints I/O events as they happen, with useful details such as UID, PID, block number, size, filename, etc.
This is useful to determine the process responsible for using the disks, as well as details on what activity the process is requesting. Be-
haviour such as random or sequential I/O can be observed by reading the block numbers.
Since this uses DTrace, only users with root privileges can run this command.
OPTIONS -a print all data
-A dump all data, space delimited
-D print time delta, us (elapsed)
-e print device name
-i print device instance
-N print major and minor numbers
-o print disk delta time, us
-s print start time, us
-t print completion time, us
-v print completion time, string
-d device
instance name to snoop (eg, dad0)
-f filename
full pathname of file to snoop
-m mount_point
mountpoint for filesystem to snoop
-n name
process name
-p PID process ID
EXAMPLES
Default output, print I/O activity as it occurs,
# iosnoop
Print human readable timestamps,
# iosnoop -v
Print major and minor numbers,
# iosnoop -N
Snoop events on the root filesystem only,
# iosnoop -m /
FIELDS
UID User ID
PID Process ID
PPID Parent Process ID
COMM command name for the process
ARGS argument listing for the process
SIZE size of the operation, bytes
BLOCK disk block for the operation (location. relative to this filesystem. more useful with the -N option to print major and minor num-
bers)
STIME timestamp for the disk request, us
TIME timestamp for the disk completion, us
DELTA elapsed time from request to completion, us (this is the elapsed time from the disk request (strategy) to the disk completion
(iodone))
DTIME time for disk to complete request, us (this is the time for the disk to complete that event since it's last event (time between
iodones), or, the time to the strategy if the disk had been idle)
STRTIME
timestamp for the disk completion, string
DEVICE device name
INS device instance number
D direction, Read or Write
MOUNT mount point
FILE filename (basename) for I/O operation
NOTES
When filtering on PID or process name, be aware that poor disk event times may be due to events that have been filtered away, for example
another process that may be seeking the disk heads elsewhere.
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
iosnoop will run forever until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO iotop(1M), dtrace(1M)version 1.50 Jul 25, 2005 iosnoop(1m)