search for: flowind

Hello, all experts. When I use pid provider, my Dscript with -F option output the codepath with flowindent as you know, e.g. -> main -> f1 -> f2 however I realized that the exec file I used at that time was stripped. Does anyone know the reason why I could see the function names? Thanks in advance. -- This message posted from opensolaris.org

Howdy, I installed Nevada build 49 in a parallels VM on my intel mac mini, and when I run the following DTrace script: $ cat follow.d #pragma option D flowindent; pid$target:::entry, pid$target:::return {} $ cat format.cmds disk 0 exit $ dtrace -s follow.d -o follow.out -c "/usr/sbin/format -f format.cmds" dtrace: script ''follow.d'' matched 13641 probes The system hangs, and the following error is written to the console and...

...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% CPU, then I kill it: #!/usr/sbin/dtrace -s #pragma D option flowindent pid14344::select:entry { self->follow = 1; } pid14344:::entry, pid14344:::return /self->follow/ {} pid14344::select:return /self->follow/ { self->follow = 0; exit(0); } - any help would be appreciated. Thanks, Kenneth This message posted from opensolaris...

Oh I see. Thank you. I will study that. Journeyer 2013/1/13 Sean Silva <silvas at purdue.edu>: > You can easily collect this information with DTrace on a Mac (or > Solaris or FreeBSD) without any special LLVM instrumentation. > > -- Sean Silva -- ---------------------------------------- Journeyer J. Joh o o s a p r o g r a m m e r a t g m a i l d o t c o m

On Sat, Jan 12, 2013 at 10:00 PM, Journeyer J. Joh <oosaprogrammer at gmail.com> wrote: > Oh I see. Thank you. I will study that. You will want to use the pid provider. The most basic thing you can probably do is to turn on flowindent and just trace `pid$target:::entry' and `pid$target:::return`, which will trace all the function calls and returns. This blog post <http://cuddletech.com/blog/pivot/entry.php?id=923> gives an example of the script I'm thinking of (this is one of the most basic DTrace scripts). Als...

...5 97200 81726329100 I''m assuming since it is now running on a new proc, that it''s related to a context switch, and perhaps the per-CPU dtrace buffers. Is there any way around this? Jim ------------------------------- #!/usr/sbin/dtrace -s #pragma D option flowindent #pragma D option bufsize=4m syscall::ioctl:entry /arg1 == 0xDF07/ { self->level=0; self->start = vtimestamp; } :::entry /self->start/ { self->level++; ts[probefunc]=vtimestamp; trace(self->level); trace(vtimestamp - self->start)...

Hi i''m trying to write my first dtrace script apparently i bit off a bit more than i can chew, i want to track io over sockets, i found your socketsize.d that gave me how to track writes, but i''m at a loss how to track reads, frankly i don''t see how your write tracker works because it uses a probe in a function that only takes two arguments but you grab size of write

I am trying to use dtrace to trace all sscanf calls. I am able to use pid provider for this. But my application forks off children at times to handle requests. Is there a way I can stop the child process immediately after it is started so that I can attach a pid provider to that and trace the scanf calls in it? I have tried using the "create" probe but that did not help.

...scall handler and the PID provider doesn''t understand the Linux runtime > linker. > > That''s not to say that Linux application behavior is totally opaque. You > can get some indication of what an application is doing with the FBT > provider: > > # dtrace -x flowindent -n ''fbt:lxsyscall:: {}'' > > and then refine the probes from there. > > >>I have a simple demo where I fiddle around with xterm and gnome-terminal on >>S10 x86. When I do exactly the same using a gnome-terminal binary from >>Linux, dtrace just go...

...6315035 enablings containing USDT probes are not dynamically reevaluated 6315037 cannot aggregate on the return value of some subroutines 6315039 including <sys/kstat.h> in a D script induces compile-time error 6315087 stack() not correctly printed for 32-bit consumers on amd64 kernel 6315975 flowindent should operate on any probe ending in "-entry"/"-return" 6317350 symbol tables should not be discarded for UNDEAD processes Files: update: usr/src/cmd/dtrace/dtrace.c update: usr/src/cmd/fm/modules/sun4u/USII-io-diagnosis/iod_main.c update: usr/src/cmd/fm/modules/sun4u/cp...

i am doing reads and writes to /dev/rdsk/c0t2d0s4 using dtrace to see how much time it took for ssdread and ssdwrite. It shows very small number 4 or 5. #pragma D option flowindent syscall::pread:entry { self->trace = 1; self->size = arg2; } syscall::pwrite:entry { self->trace = 1; self->size = arg2; } fbt:ssd:ssdread:entry /self->trace/ { self->start = timestamp; self->minor = getminor(arg0); } fbt:ssd:ssdread:return /self->start/ { @avrg[pid,prob...

hi, I am trying to find out the avg cpu time spent in each of my user methods (exclusive of other methods invoked by a method). Hence the following snippet failed miserably: ----------------------- pid$target:a.out::entry { time[probefunc] = timestamp;} pid$target:a.out::return { @spent[probefunc] = avg(timestamp - time[probefunc]);} END { printa(@spent);}

In order to get more information on IO performance problems I created the script below: #!/usr/sbin/dtrace -s #pragma D option flowindent syscall::*write*:entry /pid == $1 && guard++ == 0/ { self -> ts = timestamp; self->traceme = 1; printf("fd: %d", arg0); } fbt::: /self->traceme/ { /* elapsd =timestamp - self -> ts; printf(" elapsed : %d" , elapsd); */...

Hi Folks, I''m trying to use DTrace to understand some complex code using the user process probe. Things are basically not matching up. When I use a variable to track depth, sometimes it jumps. Similarly, the flow indent seems off. I read another post saying that this is caused by missing return statements in functions.

Hello all, I have been taking basic steps with DTrace and subscribed today to this list. I have written a simple DTrace script to trace all the function entry/exit from a given function: #pragma D option flowindent pid$1::*mysql_select*:entry { self -> start = vtimestamp ; } pid$1::*mysql_select*:return /self -> start/ { self -> start =0 ; } pid$1:::entry, pid$1:::return /self->start/ { trace (vtimestamp - self->start); } sample output: 0 -> __1cMmysql_select6FpnDTHD_pppnEItem_...

Hi, all, I''m a newbie on dtrace and the problem I am having is: For processes which have been running for more than a couple of hours, dtrace doesn''t seem to be able to trace(I waited for at least one hour and didn''t see anything happening). However, it works every time for a relatively new process. Any insight or help will be appreciated. This is my machine:

Hi, I am tracking down a problem and would like to know how I can follow a forked process with my dtrace script, or how I can trace a dynamic library. Here is the problem. I am tracing dtlogin, and specifically I am trying to determine what error libpkcs11`<routine> is returning. It turns out dtlogin forks a lot of processes, and I believe the second forked process is the one that winds