similar to: Can I use printa() for printing multiple agg regations?

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? --

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

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:

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

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;

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

N_conreq:entry { self->x=1; calledaddr=(struct xaddrf *)arg3; callingaddr=(struct xaddrf *)arg4; trace(calledaddr->link_id); tracemem(calledaddr->DTE_MAC.lsap_add, 80); trace(callingaddr->link_id); tracemem(callingaddr->DTE_MAC.lsap_add, 80); } 0 -> N_conreq 255

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

All, With Jon Haslam''s exciting news about the DTrace doc wiki (if you haven''t seen it yet, make your way to http://wikis.sun.com/display/DTrace), and with some of the discussion with the Apple folks, I''m wondering if the time isn''t right for something of a DTrace summit, perhaps as an unconference. The idea here would not be a DTrace user group (though that

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

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

Hi, Has something related to speculative tracing changed between s10 FCS and the more recent nevada builds ? I was trying the specopen.d script from the Dtrace guide on a nevada machine and it failed with : dtrace: failed to enable ''./spec.d'': DIF program content is invalid To try and narrow things down a bit I wrote the following short script. This works fine on s10, but

Hi, This is not a DTrace technical question (so, please don''t flame me for it) :) This is regarding the DTrace (un)conference TShirt. I am curious to know what engine is it. Could not figure it out. Thanks and regards, Sanjeev. -- Solaris Revenue Products Engineering, India Engineering Center, Sun Microsystems India Pvt Ltd. Tel: x27521 +91 80 669 27521

I''d like to see if we can use DTrace to as the kernel implementation of the BSD systrace security policy system (http://www.systrace.org). I don''t really want to port systrace to Solaris because I think with DTrace we already have all the necessary in kernel hooks to do this. With systrace you express things like: "httpd can bind to port 80 but not any other port, it

G''Day Folks, I''ve finally typed up my classic DTrace demo, which I use to introduce people to DTrace (I delivered this at SOSUG#1), http://www.brendangregg.com/DTrace/dtracevstruss.html Here I create a fault and show the difficulty in analysing it using previous tools. Then I compare the impact of analysing the problem using both DTrace and truss. DTrace wins (a lot!).

DTrace folks, I''m pleased to introduce a potential new DTrace-sponsored project: the Erlang DTrace provider. To be good OpenSolaris citizens, we want to put the formation of this officially sponsored project to a vote -- as outlined in the OpenSolaris Constitution -- so here are the details for the new Project, as prepared by the Project Team: Name : Erlang DTrace Integration

Hi all, There''s a dead thread about this back at http://forums.sun.com/thread.jspa?threadID=5075157, but it would be really nice to have support for if/else control flow in actions. Reasons: 1. The ternary operator ?: is already there (though it doesn''t let you do anything with side effects) 2. The user can already write arbitrary and expensive non-cacheable predicates if

Hi Ian-s, Two small patches for OSSTest. The first one turns on compiling the Linux modules for MegaRAID SAS, needed for the ultralisk machine in the Cambridge lab. The second adds an entry in the README file about the RebootTimeExtra host property, which I also needed to use for ulttralisk, as scrubbing 368GB of RAM really takes a lot! git://xenbits.xen.org/people/dariof/osstest.git misc Let

Referring to the DTrace manual: "Module If this probe corresponds to a specific program location, the name of the module in which the probe is located. This name is either the name of a kernel module or the name of a user library. Function If this probe corresponds to a specific program location, the name of the program function in which the probe is located." and then ...

Unless I am missing something I cannot find a way to do a condtional check and handle it when a dtrace script is written with macros $1, $2 being passed to it, etc... In other words I have a dtrace script that can have parameters passed to it. Lets say $1 and $2 for example. I am trying to verity that there is or is not a value for $1 or $2 and adjust accordingly. I am finding that if use macros