similar to: LatencyTop

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

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

Hello all, i''m trying to run the tool tcptop from the dtracetoolkit but it fails. I got the following error: tcptop -C 30 dtrace: failed to compile script /dev/fd/11: "usr/include/sys/kstat.h", line 439: invalid type combination I let it run on different machines on a Ultra 45 and a E20K both with Solaris 10 same result. any ideas? best regards Jens This message

hi, i want to find out the total number of incoming connections for a machine at any time using dtrace.anyone please suggest me the solution. This message posted from opensolaris.org

Hola, I am trying to isolate the memory leak I suspect in a mailman installation ? I found: http://blogs.sun.com/sanjeevb/date/200506 It gives an error: god at irt-smtp-02:~ 9:21am 65 # ./memleak.d 10312 dtrace: failed to compile script ./memleak.d: line 3: probe description pid10312:libc.so.1:malloc:entry does not match any probes I am on SunOS 5.10 Generic_127112-07 i86pc i386 i86pc Are

Hi, we are running a ceph cluster with btrfs as it''s base filesystem (kernel 3.0). At the beginning everything worked very well, but after a few days (2-3) things are getting very slow. When I look at the object store servers I see heavy disk-i/o on the btrfs filesystems (disk utilization is between 60% and 100%). I also did some tracing on the Cepp-Object-Store-Daemon, but I''m

I try to run tcptop in solaris 10 x86 with patch level 125101-04 and I get the following error /usr/include/sys/zone.h line 16: can''t find include file sys/tsol/label.h error. Is there a work around for this problem? -- This message posted from opensolaris.org

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

DTraceToolkit has a dtrace script (Proc/pidpersec.d) that refers to a variable mpid as below profile:::tick-1sec { printf("%-22Y %8d %6d\n", walltimestamp, `mpid, pids); pids = 0; } Where is `mpid getting picked from (it isn''t declared anywhere else)? What does the character ` in `mpid signify? I do not see any reference to this variable in the dtrace

thanks Richard, The experiment was indeed done with nested VM enabled. I am not sure about the internals, but i thought once overlay is setup the 2 main processes are sshd and qemu-img convert (reading data from sshd and doing the conversion) I don't see any of the qemu process running. Initial overlay setup was pretty quick and rest of the time was spent in qemu-img convert operation Suresh

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

We''re running a Solaris 10 container, with an Oracle 9.2.0.4 database - every 5-10 min, an Oracle process shoots up (using 20% + CPU) and then goes down 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%

Incase of multi-core systems where multiple threads maybe scheduled for execution, does the below dscript (from hotuser in DTraceToolkit) collect information for multiple libraries/functions that would be getting executed at a given point of time. I have been able to test it to check if it does or doesn''t. I assume it does. This was a query I have about profiling in general. #pragma D

A small script to see what SCSI commands are being issued by a system: http://blogs.sun.com/roller/page/chrisg?entry=scsi_d_script Still work in progress as I needs to handle larger CDBs but it is a start, since I don''t have a disk that big it is not a problem for me yet. Also getting the return scsi packet is a hack but so far I can see no alternative short of knowing about all the

Dtrace and Performance Teams, I have the following IO Performance Specific Questions (and I''m already savy with the lockstat and pre-dtrace utilities for performance analysis.. but in need of details regarding specifying IO bottlenecks @ the controller or IO bus..) : **Q.A*> Determining IO Saturation bottlenecks ( */.. beyond service times and kernel contention.. )/ I''m

Hi, I have high IO-Wait on the ods (ceph), the osd are running a v3.1-rc9 kernel. I also experience high IO-rates, around 500IO/s reported via iostat. Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 0.00 0.00 0.00 6.80 0.00 62.40 18.35 0.04 5.29 0.00 5.29 5.29 3.60 sdb

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

At our Physics research labs we do a lot with low latency networks. We have been using Centos for over 3 years now and its been great! We would like to tune and optimize our setup by removing unneeded packages -- kernel modules to be specific. I was wondering, how does one measure the speed of the kernel. Is that even possible?

Hi all, I currently have a OCZ Vertex 4 SSD as a ZIL device and am well aware of their exaggerated claims of sustained performance. I was thinking about getting a DRAM based ZIL accelerator such as Christopher George''s DDRDive, one of the STEC products, etc. Of course the key question i''m trying to answer is: is the price premium worth it? --- What is the (average/min/max)

Hi list. I have rebuilt tcptrack now. You can get it from here: http://www.karsites.net/centos/downloads/5.5/tcptrack-1.3.0-1.el5.i386.rpm It's not signed, so to install it with yum as root user, do: # yum localinstall --nogpgcheck tcptrack-1.3.0-1.el5.i386.rpm in the directory you d/l it to. Kind Regards, Keith Roberts -----------------------------------------------------------------