Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #233
Difficulty: Easy
The goal of ARPANET, the precursor to the global Internet, was to exploit new computer technologies to meet the needs of military command and control against nuclear threats, achieve survivable control of US nuclear forces, and improve military tactical and management decision making.
True or False?
Linux & Unix Commands - Search Man Pages

dtruss(1) [freebsd man page]

DTRUSS(1)						    BSD General Commands Manual 						 DTRUSS(1)

NAME
dtruss -- Trace system calls and userland stacks using DTrace SYNOPSIS
dtruss [-acdefholLs] [-t syscall] [-n name -p pid command] DESCRIPTION
The dtruss utility traces system calls and (optionally) userland stack traces for the specified programs. The following options are available: -p pid Trace the process with PID pid. -n name Trace the process with name name. -t syscall Trace the specified syscall only. -a Print all details. -c Print syscall counts. -d Print relative times (in microseconds). -e Print elapsed times (in microseconds). -f Follow the children processes. -l Force printing PID / TID. -o Print time spent on CPU. -s Print userland stack backtraces. -L Don't print PID / TID. -b bufsize Specify the DTrace buffer size. EXIT STATUS
The dtruss utility exits 0 on success, and >0 if an error occurs. SEE ALSO
dtrace(1) HISTORY
The dtruss utility comes from the DTraceToolkit and was first imported into FreeBSD 9.0. AUTHORS
Brendan Gregg BSD
August 26, 2010 BSD

Check Out this Related Man Page

procsystime(1m) 						   USER COMMANDS						   procsystime(1m)

NAME
procsystime - analyse system call times. Uses DTrace. SYNOPSIS
procsystime [-acehoT] [ -p PID | -n name | command ] DESCRIPTION
procsystime prints details on system call times for processes, both the elapsed times and on-cpu times can be printed. The elapsed times are interesting, to help identify syscalls that take some time to complete (during which the process may have slept). CPU time helps us identify syscalls that are consuming CPU cycles to run. Since this uses DTrace, only users with root privileges can run this command. OPTIONS
-a print all data -c print syscall counts -e print elapsed times, ns -o print CPU times, ns -T print totals -p PID examine this PID -n name examine processes which have this name EXAMPLES
Print elapsed times for PID 1871, # procsystime -p 1871 Print elapsed times for processes called "tar", # procsystime -n tar Print CPU times for "tar" processes, # procsystime -on tar Print syscall counts for "tar" processes, # procsystime -cn tar Print elapsed and CPU times for "tar" processes, # procsystime -eon tar print all details for "bash" processes, # procsystime -aTn bash run and print details for "df -h", # procsystime df -h FIELDS
SYSCALL System call name TIME (ns) Total time, nanoseconds COUNT Number of occurrences 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
procsystime will sample until Ctrl-C is hit. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
dtruss(1M), dtrace(1M), truss(1) version 1.00 Sep 22, 2005 procsystime(1m)

15 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

ps command

I want to extract elapsed time of the specific process. I use ps -o etime -p${PID} The result is 23-01:29:21 what is 23- is? Thanks (2 Replies)
Discussion started by: zam
2 Replies

2. UNIX for Dummies Questions & Answers

Get pid

Hello people, This question might seem to be a little naive but here it goes: I want to know the PID of a script that is running in the background. eg: There is a script called Data_Downloader.sh I am using the command: ps -ef | grep Data_Downloader.sh But I am getting the output as wrkarea... (9 Replies)
Discussion started by: Rajat
9 Replies

3. UNIX for Dummies Questions & Answers

PID - Getting the processname of terminated/old Process

Hi all! I'm using CentOS 5.2 with KDE. Is it possible to get a processname/cmd of a terminated process (= PID not present with PS-command) ? Are the processnames/scriptnames logged somewhere? (I did not find them in /var/log/messages) (5 Replies)
Discussion started by: JohnMurdoch
5 Replies

4. AIX

pid number creation rules on aix

Hello, On a AIX 5.3.5.0 server, we have PID exceeding 999999. This cause some troubles in our programms. I would like to know the process creation rules on aix : - what is the maximum pid number ? - what is the wrap limit on aix, and where to find it, how to configure pid wrap limit ? -... (3 Replies)
Discussion started by: astjen
3 Replies

5. Shell Programming and Scripting

multiple search keyword in grep

Dear All, I have a file containing info like TID:0903 asdfasldjflsdjf TID:0945 hjhjhkhkhkh TID:2045 hjhjhkhkhkh TID:1945 hjhjhkhkhkh TID:2045 hjhjhkhkhkh I need to show only lines containing TID:0903 asdfasldjflsdjf TID:0945 hjhjhkhkhkh TID:2045 hjhjhkhkhkh TID:2045 hjhjhkhkhkh ... (11 Replies)
Discussion started by: saifurshaon
11 Replies

6. Shell Programming and Scripting

Grep and substr

Hi, A quick one, I abstract the last line from a file which hasa string PID in itie. grep PID ~/bug_tool.log | tail -1 result PID : 25803 TID : 47983424956736PROC : db2sysc 1 but any ideas on the best way to grab only the string 25803 Thanks (7 Replies)
Discussion started by: cmac
7 Replies

7. Red Hat

What is a PID number?

What is a PID number? (3 Replies)
Discussion started by: nariangel
3 Replies

8. AIX

Assigning PID for a Process

Hello Team, Is there anyway to assign a dedicated pid for a particular java process(application). Regards, Gowtham.G (5 Replies)
Discussion started by: gowthamakanthan
5 Replies

9. UNIX for Advanced & Expert Users

Process on CPU inside syscall

Hello Experts, If a Solaris process is calling some syscall, and right now execution is inside syscall doing only CPU work, for example the inside simplest times syscall, -> app_func => times << we are here now, we have entered in the times, but not exited yet <= times <- app_func... (9 Replies)
Discussion started by: sant
9 Replies

10. Shell Programming and Scripting

script to extract PID

Can anyone explain the below script which is used to extract the PID? Why they are taking from 10 character and getting the sub string? Note:variable pid has been assigned the PID value initially as below. pid=`sed 's@FILNAME@'$destFil'@g' $scriptname |sed 's@SRCFILE@'$sourceFil'@g' |sed... (2 Replies)
Discussion started by: bk_12345
2 Replies

11. Shell Programming and Scripting

Error in finding the PID by grep and assigning to a variable

Hello All, I am facing difficulty in getting the PID value & then assigning it to a variable, kindly help me in resolving the issue. Thanks a lot in advance. The custom utility used inside the Test2.sh will process the file in a batch of 10 lines at once and for efficient memory management,... (3 Replies)
Discussion started by: duddukuri
3 Replies

12. UNIX for Advanced & Expert Users

Trace Process performance Using PID

Hi, i want to track a process using its PID in SOLARIS. i have a code in C++ , which memory is increasing steeply increasing every 20 days, from the code i couldn't see any memory leak. is there any way in UNIX where with the help of PID i can trace the Process usage evry hour. ... (3 Replies)
Discussion started by: senkerth
3 Replies

13. UNIX for Dummies Questions & Answers

How to choose the RIGHT PID?

I can find a single PID and copy it to a variable (thanks to the forum), but I have a slightly tougher situation: When a user logs into our system, it creates 5 processes example: root 21160 3096 0 07:16 ? 00:00:00 sshd: cs113 cs113 21164 21160 0 07:16 ? 00:00:00... (3 Replies)
Discussion started by: Igrok
3 Replies

14. Shell Programming and Scripting

How to find the corresponding command for a existing PID?

Hi All, A process completed already and I have the PID. I want to know the which command used for this PID. 'ps' command and '/proc' folder having the list current process only. Is there a way to search completed process PID? Thanks, Manimuthu (5 Replies)
Discussion started by: k_manimuthu
5 Replies

15. Shell Programming and Scripting

Isolate text with sed or similar utility

All, I'm getting a list like the following and I'd like to kill each PID in turn. pid (17797) pid (21748) pid (21754) pid (21704) pid (2199) pid (2159) pid (17809) pid (21769) pid (21778) pid (21715) ... (3 Replies)
Discussion started by: ejianu
3 Replies

Featured Tech Videos