7 More Discussions You Might Find Interesting
1. Red Hat
I have requirement for strace utility rpm package for RHEL 5.9. I have made a google for last 1 hr. but did not find the required one. Can any one help me out to find out the compatible rpm package of strace for Redhat 5.9 version (I require 64 bit version). (7 Replies)
Discussion started by: Anjan Ganguly
7 Replies
2. Ubuntu
I want to run the strace -p xxxx -o in a script to monitor a process that hangs sometimes and requires a restart, my question is if strace is constantly running in the background will it chew up system resources and cause the system slowness? (3 Replies)
Discussion started by: wereyou
3 Replies
3. Android
I need to run and monitor applications on Android Emulator. I am using the strace utility to monitor system calls. Everytime to start strace i need to manually start the application , get the process Id of the application and then give it to strace to start logging all the system calls.
So is... (20 Replies)
Discussion started by: far001han
20 Replies
4. UNIX for Advanced & Expert Users
Hi All,
Good day, need some help on strace result. We're encountering oracle Database server connection slowness (using sqlplus login to db server, there have 1 or 2 secs delay) we had generated strace and provide to oracle to investigate, and they told us it look like OS problem (Our OS is Red... (4 Replies)
Discussion started by: klng
4 Replies
5. UNIX for Advanced & Expert Users
Hi,
does anyone know the equivalent command of the following in AIX :
$ strace -tp 15033
Process 15033 attached - interrupt to quit
11:28:06 gettimeofday({1257766086, 104118}, NULL) = 0
11:28:06 getrusage(RUSAGE_SELF, {ru_utime={2270, 615813}, ru_stime={0, 634903}, ...}) = 0
Thank you (6 Replies)
Discussion started by: big123456
6 Replies
6. UNIX for Advanced & Expert Users
Hi All,
int ioctl(int d, int request, ...);
Can somebody tell me how does ioctl decides the input parameter: "request".
Sometimes, its SNDCTL_TMR_TIMEBASE or TCGETS
or FIONREAD...etc.
What is the pattern??
I am asking this coz my strace returns this: ... (1 Reply)
Discussion started by: angad.makkar
1 Replies
7. UNIX for Advanced & Expert Users
OK so I wanted to know how does grep outputs to the pipe and how sort reads from it. So I run a strace over "grep blah myfile | sort" and this is what I got:
open("myfile", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0600, st_size=84, ...}) = 0
read(3, "blah blah and blah cause of... (4 Replies)
Discussion started by: klam
4 Replies
strace(1M) System Administration Commands strace(1M)
NAME
strace - print STREAMS trace messages
SYNOPSIS
strace [ mid sid level...]
DESCRIPTION
strace without arguments writes all STREAMS event trace messages from all drivers and modules to its standard output. These messages are
obtained from the STREAMS log driver (see log(7D)). If arguments are provided, they must be in triplets of the form mid, sid, level, where
mid is a STREAMS module ID number, sid is a sub-ID number, and level is a tracing priority level. Each triplet indicates that tracing
messages are to be received from the given module/driver, sub-ID (usually indicating minor device), and priority level equal to, or less
than the given level. The token all may be used for any member to indicate no restriction for that attribute.
The format of each trace message output is:
<seq> <time> <ticks> <level> <flags> <mid> <sid> <text>
<seq> trace sequence number
<time> time of message in hh:mm:ss
<ticks> time of message in machine ticks since boot
<level> tracing priority level
<flags> E : message is also in the error log F : indicates a fatal error N : mail was sent to the system administrator (hardcoded
as root)
<mid> module ID number of source
<sid> sub-ID number of source
<text> formatted text of the trace message
Once initiated, strace will continue to execute until terminated by the user.
EXAMPLES
Example 1: A sample output of the strace command:
The following example outputs all trace messages from the module or driver whose module ID is 41:
strace 41 all all
The following example outputs those trace messages from driver or module ID 41 with sub-IDs 0, 1, or 2:
strace 41 0 1 41 1 1 41 2 0
Messages from sub-IDs 0 and 1 must have a tracing level less than or equal to 1. Those from sub-ID 2 must have a tracing level of 0.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
attributes(5), log(7D)
STREAMS Programming Guide
NOTES
o There is no restriction to the number of strace processes opening the STREAMS log driver at a time.
o The log-driver records the list of the triplets specified in the command invocation, and compares each potential trace message against
this list to decide if it should be formatted and sent up to the strace process. Hence, long lists of triplets will have a greater
impact on overall STREAMS performance. Running strace will have the most impact on the timing of the modules and drivers generating
the trace messages that are sent to the strace process. If trace messages are generated faster than the strace process can handle
them, some of the messages will be lost. This last case can be determined by examining the sequence numbers on the trace messages
output.
SunOS 5.10 4 Oct 1994 strace(1M)