similar to: dtrace overhead and proper measuring technique

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

Hi Folks, I''m trying to get to grips with dapptrace, running it on my Mac. Everything seems pretty straightforward, except for - of course - what I''m trying to do. I want to focus in on my code but I can''t seem to be able to output just the functions I want, i.e. user functions. The -U option gives everything. Too much of course. Leaving that blank means the

Just to let people know what my big picture is, I''m trying to write a script that will let me run a program, and name a progeny of that program that I want to debug. My script should find the first occurrence of that progeny, and run it until it finishes initializing the runtime linker, but stop it before it runs any shared library startup routines. (Failing that, I''d be okay

I added a couple of static probes to Firefox to measure actual work done. I could have used a pid$target probe with a function name but work is done within an if statement, which is where I placed the static probes. I''m wondering about my use, though. Is the following significantly more efficient than pid$target::FunName:entry and return? I heard somewhere that $target does not

Bryan, I''m trying to use a Dtrace script with a modest size global variable and hit a problem. Looking for a solution, I turn to the docs and notice that option "dynvarsize" appears just once in the docs, and it refers you to Chapter 3, where there is no mention. It doesn''t help me anyhow. I have: #!/usr/sbin/dtrace -qws #pragma D option dynvarsize=2000000

I read some of the previous posts on this forum, which discussed this particular problem. I tried to use the solution that those posts suggested, but I am still having a problem with my dtrace application running on a heavily loaded system. I have the following lines in my D script, #pragma D option aggsize=8m #pragma D option bufsize=16m #pragma D option dynvarsize=16m #pragma D option aggrate=0

while trying to use the USDT made available to us in Postgresql database I have problems enabling them. On my database server I ran 1024+ PG processes (1024 clients). The server is a 8 core T2000 @1000MHz. 32GB. 7 storage arrays. Solaris 10 Update 4. Home compiled PG 8.3 beta 1 (optimized binary for T1 chip) with DTrace probes enabled. When running without enabling the probes I have approx 25%

Hi All, What is the correct way to provide a CentOS 7 - WMware image for ESX ? As an amateur to VMware - I thought - great I can get VMplayer and ESX should be able to import my image... Wrong... I even went through the trouble of "converting" to VMWare workstation and thinking ESX could import that - Apparently still Wrong... I cannot for the life of me understand how one product

I am teaching a DTrace class and a student noticed that 2 iosnoop scripts run in two different windows were producing different results. I was not able to answer why this is. Can anyone explain this. Here are the reults from the two windows: # io.d ... sched 0 <none> 1024 dad1 W 0.156 bash 1998

On Thu, Sep 3, 2015 at 6:45 PM, Kostya Serebryany <kcc at google.com> wrote: > Did you build the Postgres code with -fsanitize-coverage=... ? Yes: CC = clang CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -Wno-unused-command-line-argument -g -O0 -fsanitize=address

This is on FreeBSD 4.6-STABLE, doing an mget with wildcard char on a non-existent file(s) produces a SEGV. Reproduce the bug as follows (Note: "zqw*" is a pattern that does not match): % sftp user at host user at host's password: sftp> mget zqw* Program received signal SIGSEGV, Segmentation fault. 0x804c5db in process_get (conn=0x80520e0, src=0x80540b0 "zwq*",

Ok, so I think I have a complete explanation for the difference between the *BSD behaviour and the Linux/Solaris behaviour. Well, almost complete :) Pull out your trusty copies of "The Design and Implementation of the 4.4BSD Operating System" as well as "Unix Internals: The New Frontiers". Specifically, pages 111-112 and 344 of the former and page 108 of the latter. It comes

After getting past the icon problem I ran into my next problem: SpinCtrl.cpp src/SpinCtrl.cpp(1141) : error C2065: ''cWxSpinCtrl'' : undeclared identifier src/SpinCtrl.cpp(1141) : error C2228: left of ''.klass'' must have class/struct/union type src/SpinCtrl.cpp(1147) : error C2371: ''cWxSpinCtrl'' : redefinition; different basic types ... The

In article <CABr8-B6fcNgogynq66nNMkSLCHAtqA4OrL09XY6ABPRV4H+ZQw at mail.gmail.com>, Jerry Geis <jerry.geis at gmail.com> wrote: > Hi All, > > What is the correct way to provide a CentOS 7 - WMware image for ESX ? > > As an amateur to VMware - I thought - great I can get VMplayer and ESX > should be able to import my image... Wrong... I even went through the >

Guys, sorry for the reposting, but I''ve got some of suggestions in private all of them assuming that I was talking about general purpose C++ programming. This is all within the DTrace framework, and it still seems to be a problem for me. I can combat it with increasing the dynvarsize but that doesn''t seem to be too attractive. Any hints will be highly appreciated. Thanks,

The following script is used as a first attempt to discover IO patterns in a dbase setup: #------------------------------------------------------------------ #pragma D option dynvarsize=128m dtrace:::BEGIN { } pid$target::kaio:entry { self->doit = 1; } pid$target::_aiodone:return { self->doit = 0; } io:::start /self->doit || execname == "oracle"/ {

I have a large (88-drive) zpool in which a drive was recently replaced. (The pool has a bunch of duff Toshiba MK2001TRKB drives -- never ever pay money for these! -- and I'm trying to replace them one by one before they fail completely.) The resilver on the first drive replacement has been taking much much too long, and currently it's stuck in this state: pool: export state: DEGRADED

One of our backend pop/imap-server running dovecot v1.2.16 experienced some problems yesterday. It suddenly couldn't authenticate users anymore, flooding the logs with: pop3-login: Disconnected (auth failed, 1 attempts): user=<user1 at example.com>, method=PLAIN, rip=192.168.42.15, lip=192.168.42.28 The problem seemed to start with this log entry: Mar 29 18:57:21 popimap1 dovecot:

https://bugzilla.mindrot.org/show_bug.cgi?id=2619 Bug ID: 2619 Summary: infinite loop, 100% cpu use in ssh if ^Z is pressed at password prompt Product: Portable OpenSSH Version: 7.3p1 Hardware: Other OS: Linux Status: NEW Severity: enhancement Priority: P5 Component:

happy new year. a day off is a day to pick up a new project, so I wrestled my way through making ogg vorbis work on macosx. first, libao (not entirely a proper patch, but 2 source file diffs and a diff of a configure'd Makefile to one that works.): http://bolson.org/pub/libao-0.8.2-diff.tar.gz libogg and libvorbis compiled without incident. vorbis-tools were more complicated. I think