similar to: Any dtrace experts willing to profile Twiki''s dev branch?

Hi, If you have a custom kernel (and therefore have duplicates of everything in /kernel in your custom kernel) and have noticed that when you try to use anonymous tracing, dtrace adds multiple copies of the forceload directives to /etc/system, e.g.: * vvvv Added by DTrace * * The following forceload directives were added by dtrace(1M) to allow for * tracing during boot. If these

everyone Here: How do you do! dtrace is interesting. I am studing how to write dtrace script and analyze situation. I read dtrace_example.pdf and 819-6959.pdf document more than five times with careful. because I am newbie to studing dtrace.so I still don''t know how to begin. for question: 1. What consumes time? 2. Which system call(s) consume(s) time?

Does anyone has any ideas about this problem? 2008/1/15, ?? TaoJie <eulertao at gmail.com>: > > Hi all: > > I''m working on revealing system performance now. > My testing program is an infinite loop. Inside the loop, it will do some > mathematical opertaions and call function callee(), then go to the next > loop. > I install a alarm(30) in the program. It

Have you considered the mdb dcmd ::pfiles? mfe at inker:~/Code/dtrace/examples$ *pfexec mdb -k* Loading modules: [ unix genunix specfs dtrace mac cpu.generic uppc pcplusmp scsi_vhci zfs ip hook neti sockfs arp usba uhci fctl s1394 stmf stmf_sbd md lofs random idm sd crypto fcp cpc fcip smbsrv nfs ufs logindmux ptm nsmb sppp nsctl sdbc rdc sv ii ipc ] > *::ps ! grep clock-applet* R 1744

Dear dtrace Experts, I have seen some dtrace utilities like opensnoop and execsnoop etc. My interest is to write a simple script that can snoop the files which uses the 3 syscalls like open,create,unlink. I have gone through dtrace oneliners that can do the same : dtrace -n ''syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0));}'' dtrace -n

Hello Srikant - A quantization distributes the results of your aggregation into ranges ordered by a power-of-two. Presumably what you''d do in your script is capture the inclusive elapsed time of each function call in your library, then use this quantization to see how tightly-banded the times are. Perhaps there''s some blocking I/O in some of your calls, for example, in which

The earlier post with the Dtrace probes definition (sent on April 23) was only to solicit feedback from all prospective users of iSCSI DTrace probes. I will follow up shortly with an updated document requesting approval from the community. thanks Priya -------- Original Message -------- Subject: Dtrace provider for the COMSTAR iscsi Target Port Provider - Review Request Date: Thu, 23 Apr

This is from a discussion on opensolaris-tools that is somewhat relevant for DTrace community. I wrote a simple D script (http://www.opensolaris.org/os/project/onnv/onnv_build/faster_builds/tools/dtrace/dirtrace.d) that collects data for each dmake process during the Solaris build. After that the data is post-processed by a Perl script

The open solaris dtrace page (http://www.opensolaris.org/os/community/dtrace/) has a bad link to the DTrace Guide(http://docs.sun.com/db/doc/817-6223). This message posted from opensolaris.org

Hi, I am kind of new to DTrace , I have written a script to time function calls in our application library , Wanted to know how to interpret the output from quantize of the elapsed time in each function call , here is a sample Here is the entry and return function for the library that is being traced pid$1:libswduar::entry { duarEntry[probefunc] = timestamp;

To remember all dtrace actions, aggregations and variables is a headache, even worse, they are not include in dtrace(1M) now. So here is a chance to have a CLI RFE - to have something like "dtrace --actions", which will list all actions, like this page: http://developers.sun.com/solaris/articles/dtrace_quickref/dtrace_functions.html "dtrace --aggregations", lists all

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

G''Day Folks, I''ve just rewritten iosnoop so that uses command line arguments (I caved in and used a little Bourne shell for this - hence it''s lost it''s ".d" extension). It''s much more useful now. # iosnoop -h USAGE: iosnoop [-a|-A|-Degstv] [-d device] [-f filename] [-m mount_point] iosnoop # default output

G''Day Folks, Well, I had a weekend home in Sydney while inbetween flights and have knocked out a few programs. (I''ve been programming for 23 hours straight, so if there is something really dumb in one my scripts then please excuse me :) # socketsnoop.d UID PID DIR SIZE CMD 0 19886 W 64 ssh mars 0 19886 R 80 ssh mars 0 19915 W 0

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:

Hi Max/DTrace list, > At any rate, without the -C, I can''t use #include <sys/stream.h>. > Without the #include <sys/stream.h>, I can''t use the M_DATA. > As it is, I get the following: > > # ./strrput.d 0xd595a6c0 <-- this is a vnode for a socket > ftp is using (not important here) > dtrace: failed to compile script ./strrput.d: line 7: >

Hi, Is there a specific reason the DTRACEHIOC_REMOVE ioctl is deprecated? I found I needed to use it in my Perl USDT provider code[*], which creates providers dynamically at runtime. I wonder if I''m missing a better way of doing the same thing. The situation I''m handling with the remove operation is killing and recreating a perl interpreter in the same process, which

For those who may have missed the news, the DTrace movers and shakers have moved over to a new mailing list; you can sign up at http://dtrace.org/blogs/mailing-list/ And there will be a conference dedicated to DTrace on April 3rd in San Francisco, more information here: http://wiki.smartos.org/display/DOC/dtrace.conf -- best regards, Deirdr? Straughan SmartOS Community Manager Joyent cell

G''Day Folks, Well, this one was my white whale. I now have a demonstration program that uses Perl, Kstat, /proc/*/usage, /proc/*/psinfo, and DTrace. The program itself is more of a prototype, I want to get serious about it and rewrite it in C. It currently has output like, # prustat -t5 -snet 10 PID %CPU %Mem %Disk %Net COMM 90 0.00 0.09 0.00 0.00

Hi, I''m wondering about what dtrace -G -s probes.d code.o is doing. Does this command change the code.o object file or is it only creating an probes.o object file. I''m wondering how I can gather many dtrace probes from many different directories in one provider to see if this is possible. Rgrds Mikael