similar to: Request for code review: the brendan() action

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:

As noted on my blog and at http://www.opensolaris.org/os/community/dtrace/shells/ I''ve made available a DTrace provider for the Bourne shell. Before anyone starts yelling at me for not starting with another shell, read the blog I made explaining why we started with shell (link on the community page referenced above). For /bin/sh, I''ve put up something akin to a chapter in

G''Day All, I''m putting together a PSARC case to begin integration of the DTrace network providers. I''ve drawn up a rough plan which splits this project into over a dozen smaller steps, as documented on the network provider page: http://www.opensolaris.org/os/community/dtrace/NetworkProvider#Plan Below is a draft PSARC document for task 1, IP provider send/receive

Does anyone out there have any thoughts on the type of load common DTrace scripts would cause on a system if run 24x7? I know "common DTrace scripts" and their underlining probe calls a vague statement. So for the lack of a common and establish set of scripts in the OS, I''ll use the most popular right for my question...the DTraceToolkit from Brendan Gregg. Which by the

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

Suppose I have a USDT probe in Firefox and that I''m trying to catch the startup with a probe like this: proc:::exec-success /execname == "firefox-bin"/ { start = timestamp; } and stop tracing when Firefox hits this USDT probe: mozilla:::main-entry { exit(0); } How do I put the running firefox-bin into "trace mode" so that my USDT probe fires? Thanks, Joel

I''m interested in monitoring the amount of stack used by a multi-threaded program. I assume ''stackdepth'' built-in would be useful...but not sure. Been through demo''s, ToolKit, and internals..but it''s just not clicking for me yet. Not sure how to measure start/end of stack size dynamically...Anyone know how to break this down? This message posted from

Hi , I have posted DTrace script to snoop tcp traffic and also provided a wrapper script for it to filter out unwanted traffic. http://blogs.sun.com/roller/comments/raviswam/Weblog/tcp_snoop_using_dtrace Please let me know if you have any feedback/comments on this. Thanks Ravi

G''Day Folks, While I have a few minutes online (which is rare at the moment - travel), let me post about a couple of new scripts. I''ve just uploaded them to http://www.brendangregg.com/dtrace.html. They are to profile user-level functions and libaries; and kernel-level functions and modules. They sample, rather than trace (which can be both good and bad). Here is hotuser

I see Intel has released a new tool. Oh, it requires some patches to the kernel to record latency times. Good thing people don''t mind patching their kernels, eh? So who can write the equivalent latencytop.d the fastest? ;-) http://www.latencytop.org/ -- cburgess at qnx.com

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

I believe that I have incorporated all of the feedback given (thanks!). Changes since the 2008-11-16 version include: - ksh style & coding standards compliance in test script (Roland) - "dof_init_debug == B_FALSE" vs. "!dof_init_debug" (Adam) The updated webrev is at: http://cr.opensolaris.org/~mgerdts/6750659-2008-12-03/ -- Mike Gerdts http://mgerdts.blogspot.com/

G''Day Folks, Check out this DTrace script, # ./swapinfo.d RAM _______Total 511 Mb RAM Unusable 8 Mb RAM Kernel 96 Mb RAM Locked 0 Mb RAM Used 318 Mb RAM Avail 88 Mb Disk _______Total 1023 Mb Disk Used 9 Mb Disk Avail 1014 Mb Swap _______Total 1367 Mb Swap Used 327

Is there a trick to listing available providers? I can''t find it.

> There are times when arg0 can be NULL [for the interrupt-start or > interrupt-complete probe] if there''s no associated device. > There''s already a bug open to address the error in the documentation. > 6284911 args to interrupt-start and interrupt-complete need more info Hmm, I noticed that, too. There''s currently a thread on yahoo''s solarisx86

I have been using iosoop script (see http://www.opensolaris.org/os/community/dtrace/scripts/) written by Brendan Gregg to look at the IO operations of my application. When I was running my test-program on a UFS filesystem I could see both read and write operations like: UID PID D BLOCK SIZE COMM PATHNAME 203803 4436 R 6016592 16384 diskio <none> 203803 4436 W 3448432

Is there any work on keeping DTraceTools up to date with the latest snv builds. These scripts are pretty useful and help get a novice dtrace user like me doing useful work quickly. Specifically the tcp stack tools like tcptop and tcpsnoop don''t work with later OpenSolaris builds. Thanks, Gary -- This message posted from opensolaris.org

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

Folks, I came across an IPv6 snv_31 network driver problem during testing. I can "ping" an IPv6 address, but when I try and log on to the IPv6 address I get an RPC failure. Not knowing much about dtrace, I thought I would give some of the networking dtrace scripts a try that I found here: http://www.opensolaris.org/os/community/dtrace/dtracetoolkit/ (tcptop or any other script in the

I have a SunRay server that I am looking at to determine some sizing requirements in my department. The machine has 16G of ram and 10G of swap. Currently, I have about 4G of swap used. I am wondering if dtrace/mdb can be used to find out what lwp/processes have been swapped out? Any hints? This message posted from opensolaris.org