similar to: Using dtrace to snoop messages between two Streams modules

After building and bfu''in the lastest ON build, any time I run a dtrace script I get a Seg Fault. Is there a dtrace for dtrace :) Doug root at prae> dtrace -n ''syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }'' Segmentation Fault (core dumped) root at prae> pstack core core ''core'' of 101364: dtrace -n

We recently had a strange NFS performance anomaly between a V880 running snv_124 and two NetApp filers. To investigate, a DTrace NFSv4 (and eventually NFSv3) client provider would been extremely helpful. Unfortunately, all I could find were a request for code review of a v3 client provider and another request for help developing a v4 provider. Nothing seems to have come from those initiatives,

Hello all, I saw this question about a year back in the archive[1], but with no final answer. I would like to trace shmget calls and also get the id of the shared memory segment. That script looked like[2], but we dont get the id since arg1 is the errno value. How do i access the shm id, i would need this to debug a customer problem but i don''t have time to learn it the hard

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

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

Hi all, Is there some documentation or some example on how to interpret the arg0 .. arg<n> for the aioread, aiowrite, aiowait syscalls? The system call name for all three seems to be "kaio". Michael === Michael Mueller ================== Tel. + 49 8171 63600 Fax. + 49 8171 63615 Web: http://www.michael-mueller-it.de ======================================

everyone, Just out of curiosity, I did a dtrace -n ''syscall:::entry { @num[execname, probefunc] = count(); }'' and looked at the entries produced by ''rm''. I see everything that rm did, *except* the unlinkat - which is unfortunate because I want to trace which processes have deleted which files. So - does dtrace contain unlinkat as a probe for a system call?

I have found that pid provider can not create memcpy:return probe for 64bit process on snv_110. For example, the pid is 10603, I will have following output for dtrace command: #dtrace -n pid10603:libc.so.1:memcpy:return dtrace: invalid probe specifier pid10603:libc.so.1:memcpy:return: probe description pid10603:libc.so.1:memcpy:return does not match any probes This just

Tried to start up tcptop_snv on snv87 x86 and got <i>dtrace: failed to compile script /dev/fd/11: line 168: conn_tcp is not a member of struct conn_s</i> Line 288 has this line: <i>this->tcpp = (tcp_t *)this->connp->conn_tcp;</i> which, after looking at line 168 of <a

Hello, I''m using the below dtrace script to capture the flow and times of kernel functions, from an ioctl() call. After an entry into restorectx(), the trace of startimestamp - vtimestamp makes a dramatic jump downwards. Here''s the snippet showing the jump... 6 -> di_checkmem 8 220176600 6 <- di_checkmem

Hi, In Solairs Dtrace User Guide, page 193, it lists the arguments of ERROR probe. One of these arguments is arg3, it is explained as "The DIF offset into that action or -1 if not applicable". Then what does the abbr. DIF mean? Regards TJ

Hello. I have a Solaris 11/11 x86 box (which I migrated from SolEx 11/10 a couple of weeks ago). Without no obvious reason (at least for me), after an uptime of 1 to 2 days (observed 3 times now) Solaris sets arc_no_grow to 1 and then never sets it back to 0. ARC is being shrunk to less than 1 GB -- needless to say that performance is terrible. There is not much load on this system. Memory

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hi, i''m trying to use the nfsv3 provider on S10U6, with the following simple script: #! /usr/sbin/dtrace -s #pragma D option quiet nfsv3:::op-read-start { printf("%s\n", args[1]->noi_curpath); } however, when running it, i get the following error: dtrace: failed to compile script ./nfs2.d: line 5: failed to grab

Hey, Im able to reproduce a crash from plockstat everytime Im tracing a JVM pid. I do recall a problem related with this one, but not clear if this has been fixed in U3 or is it planned for U4 ? Any BugID opened for this stack trace: > ::stack libc.so.1`strlen+0x50(100003faa, ffffffff7ffff5c8, ffffffff7eca1114, ffffffff7fffec79, 0, 100003fa9) libc.so.1`snprintf+0x88(ffffffff7ffff8f0, 0,

Maybe someone can share that script with me? Full problem i''m trying to investigate - my S10u7 get I\O error when accessing LUN on EMC cx480, but only if LUN created on raid6 raid group. When I create one on raid5 or raid10 everything goes fine. -- ____________ Voropaev Pavel -------------- next part -------------- An HTML attachment was scrubbed... URL:

What''s going on? # dtrace -s iotime_all.d 100 dtrace: failed to enable ''iotime_all.d'': DIF program content is invalid The errant script.... #pragma D option quiet BEGIN { stime = timestamp; io_count = 0; } io:::start /args[2]->fi_pathname != "<none>"/ { start[pid, args[2]->fi_pathname, args[0]->b_edev, args[0]->b_blkno,

Hi all, So I just took Sun''s dtrace class this week and one thing that piqued my interest was the instrumenting of a process''s instructions and how to find the original instructions. (I''m looking around at resources for learning SPARC assembly to help me when using mdb for analysis, though I vaguely remember pieces from a grad school compiler theory class about 10 years

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

I sent this to Brendan but never got a response. Maybe someone else can help? ----- Hi Brendan. I''m trying to debug a problem where I need to snoop the network traffic over a punchin connection, where snoop doesn''t work. I found your tcpsnoop dtrace tool, which seemed like it might be able to do what I need. Unfortunately, it doesn''t seem to have an option to dump

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