Displaying 20 results from an estimated 5000 matches similar to: "Formating output."
2005 Dec 22
9
truncating aggregation output only
Hello dtrace-discuss,
Sometimes I want to run a script for some time and every n second
output N top entries. trunc() isn''t suitable here as it also removed
keys/values. I want it ''coz over time if I use sum() entries which
are normally truncated can actually get to top over a time.
Maybe printa() extension, something like: printa(@b[10]) - to output
top 10?
--
2005 Dec 15
1
User defined tick-n probe.
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Is there a way to make
2007 Aug 01
2
getting hex out of ints
I have a probe:
pid111::myfunc:entry
{
self->arg = arg0;
}
pid111::myfunc:return
/self->arg/
{
@[self->arg] = quantize();
}
works great, but i''d like arg0 to be printed in hex. I''ve tried numerous approaches to do this but i''ve hit a wall every time. I''ve tried:
1) self->arg = sprintf(arg0);
no, cuz dtrace has no sprintf
2) self->arg
2007 Jul 11
5
Error trying to count return points in functions.
Whilst trying out some D to get an insight into what is the most
common reason for a given function to return, I have bumped
into an error I don''t understand.
The first take on what I was trying to do was:
# dtrace -n ''fbt:ip:ip_input:return{@home[arg0] = count();}''
and all was well. The next step was:
# dtrace -n
2009 Feb 27
7
Memory usage for C++ Application is growing
Hi ,
I have c++ server application in solaries 10 . Day by day memory usage is growing
i try to find memory leaks with MDB and DTRACE and no leaks found. how can we find reason for growing memory , can we know which memory sigment is cause for growing memory usage
Thanks in Advance.
Rao
--
This message posted from opensolaris.org
2011 Aug 19
4
Using dtrace to follow a kernel linked list
I''m looking for an example of how one could write a dtrace probe
that could follow something like a NULL terminated linked list.
For example:
struct list {
struct list *next;
void *data;
};
struct list *list_root;
Assuming I had "list_root" available, but I wanted to know how long
the linked list is, how can I do this in a dtrace probe?
If I had looping
2011 Jan 18
2
Surprise Thread Preemptions
Hi,
I would like to know about which threads will be preempted by which on my OpenSolaris machine.
Therefore, I ran a multithreaded program "myprogram" with 32 threads on my 24-core Solaris machine. I make sure that each thread of my program has same priority (priority zero), so that we can reduce priority inversions (saving preemptions -- system overhead). However, I ran the following
2006 Dec 07
1
When does ufunc/func work?
I''m trying to profile the time spent in libc functions in a large build job (building Perl), and I have trouble getting ufunc and func working. (func() is not strictly needed; I was just hoping to use it in order to profile idle time.)
Here''s the story. I''ve written a dtrace script to start a separate dtrace process for each invoked command:
int fileid;
2005 Oct 31
11
Aggregation elements
Howdy,
Is there a method to get the number of elements in an aggregation? Are the
results stored in an aggregation guaranteed to be in any type of order?
Thanks for any insight,
- Ryan
--
UNIX Administrator
http://daemons.net/~matty
2006 May 12
10
why dtrace is not quiet?
i''m running the following script:
#pragma D option quiet
profile:::tick-1sec
/ ++x >= 15 /
{
exit(0);
}
io:::start {
@io_size[execname] = sum(args[0]->b_bcount);
}
on exit, the script prints out the value of @io_size, why?
there''s no printa(), and i also specified "D option quiet" (i also tried -q).
this seems to happen with any kind of probe: on exit(0) all
2006 May 08
13
monitoring tcp writes
i''m using the following probe to calculate how many bytes are being written by tcp write calls, by process and total:
fbt:ip:tcp_output:entry
{
this->tcpout_size = msgdsize(args[1]);
@tcpout_size[execname] = sum(this->tcpout_size);
@tcpout_size["TOTAL_TCP_OUT"] = sum(this->tcpout_size);
}
I run this probe for N seconds.
I suppose that if i get the
2010 May 04
2
sched provider
Hi All,
I used the following script from the dtrace manual to measure how long a particular process runs on the cpu. Modified it to look at the exact timestamps:
[i]
sched:::on-cpu
{
self->ts = timestamp;
printf("on=%d\n", self->ts)
}
sched:::off-cpu
/self->ts/
{
printf("off=%d\n", timestamp)
self->ts = 0;
}
[/i]
The output looks like this:
[i]on=24591
off=24603
2007 Apr 13
2
How to dtrace which process is writting a veritas volume?
Hi all,
How to dtrace a who is writing a veritas volume?
Thanks.
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2008 Jul 24
5
printa stddev error
Hi,
Searched for similar errors and nothing came up. Anybody know what this is?
When using aggregate stddev, and then trying to print it at END, using printa, I get this error:
dtrace: processing aborted: Invalid return value from callback
avg works fine. Tried on two recent builds of solaris (build 89 and build 94), on two difference sparc systems.
Here''s a sample script:
2006 Sep 21
1
Dtrace script compilation error.
Hi All,
One of the customer is seeing the following error messages.
He is using a S10U1 system with all latest patches.
Dtrace script is attached.
I am not seeing these error messages on S10U2 system.
What could be the problem?
Thanks,
Gangadhar.
------------------------------------------------------------------------
rroberto at njengsunu60-2:~$ dtrace -AFs /lib/svc/share/kcfd.d
dtrace:
2006 Oct 24
15
How to emit associative array after ^C
Boy am I a dummy. I want to simply dump out unfreed allocations when I terminate the script. What''s the secret sauce?
#!/usr/sbin/dtrace -s
pid$1::MyAlloc:return
{
bufs[arg1] = walltimestamp;
}
pid$1::MyFree:entry
/bufs[arg0]/
{
bufs[arg0] = 0;
}
This message posted from opensolaris.org
2009 Sep 09
10
dtrace overhead and proper measuring technique
I''m trying to time a function within Firefoxwith a pid$target probe
[2]. e.g
dtrace -Zqw -x dynvarsize=64m -x evaltime=preinit -p 13954 -s menu-
construct.d -s sigcont.d
elapsed: 12.7942481ms
cpu : 7.7911194ms
count : 40 times
I''m also measuring Firefox startup time by running it arguments like
this:
... file:///Users/joelr/work/mozilla/startup/startup.html#`python
2007 Feb 15
2
profile provider: is it me doing stupid things?
Just showing someone how great DTrace is and then we spot something I do not understand.
Of course it can be a major misunderstanding of myself. Would appreciate another (expert) look upon this.
The goal we try to achieve is trying to get insight if there is a bursty nature in the time slot when system calls are done. Following DTrace snippet is tried:
dtrace -q -p 3173 -n
2005 Nov 15
6
Oracle 9 process on Sol 10 container, doing a pollsys, using high CPU
We''re running a Solaris 10 container, with an Oracle 9.2.0.4 database - every 5-10 min, an Oracle process shoots up (using 20% + CPU) and then goes down in CPU %, doing a [i]pollsys [/i](see it via dtruss). I tried using some of the trace scripts in the Dtracetoolkit to see what the process is doing, but without any luck - also tried with the following, but dtrace process goes up to 30%
2010 Jun 17
9
Monitoring filessytem access
When somebody is hammering on the system, I want to be able to detect who''s
doing it, and hopefully even what they''re doing.
I can''t seem to find any way to do that. Any suggestions?
Everything I can find ... iostat, nfsstat, etc ... AFAIK, just show me
performance statistics and so forth. I''m looking for something more
granular. Either *who* the