Rezultati pretraživanja
  1. 27. tra 2019.

    DTrace for Windows 10 (Version 1903 Build 18362.53) PID provider

  2. 10. ožu 2019.

    Today’s unexpected finding - you can make work at early booting stage, to detect issues which cannot be catch once you have access to the prompt. Doesn’t look like a feature I expect to use daily, but a game changer in specific scenarios.

  3. 3. velj

    nfsiosnoop v3.0 -- New flags: -v (verbose, show filenames and all tracepoints) -u user (filter on name/uid) -g group (filter on group/gid) -t fmt (time format) -q (quiet; hide NULL reads/writes, open, close, dup)

  4. 3. velj
  5. 1. velj

    Wow. "Even though the PPS does not read data off the of serial line, random electric noise sometimes presents data on the line. Since it is random, it has a good chance that it will have a parity error, causing a break indication, "

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  6. 31. sij

    In the kernel VFS layer is comprised of functions that operate on “struct path *” which contains a “struct vfsmount *” which contains “struct super_block *” which contains “struct file_system_type *” which contains “char *name” which is “xfs”, “nfs”, etc

  7. 31. sij

    On CentOS 7.7 you can use ('s cousin) to plumb the kernel for NFS activity to associate I/O to individual UNIX processes, users, etc. nfsiosnoop v1.0 -- Pictured: Green = action, Cyan = Read, Red = Write

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  8. 28. sij

    tweeps: this unsafe script will blink the mic light on your thinkpad as you suffer swap io. This "instrument" _may_ cause additional swap io. ... I'm looking cross eyed at you chrome.

  9. 4. pro 2019.

    Today I finally used for the first time in anger to debug some performance issues. It's truly amazing how deep you can go with it. Turns out our issue is a write storm caused by unexpected row locks being taken.

  10. 18. stu 2019.

    Blogged about profiling with and some other useful tools -

  11. 1. kol 2019.

    Found this relic during my move. Feeling cute. Might use later... IDK

  12. 16. srp 2019.
  13. 5. srp 2019.

    Real-time TCP Reset debugging on with : dwatch -r RST -RFE 'printf("%s", tcpflag_string[args[4]->tcp_flags])' tcp:::accept-established,tcp:::accept-refused,tcp:::connect-established,tcp:::connect-refused,tcp:::connect-request,tcp:::receive,tcp:::send

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  14. 5. srp 2019.

    The talks are now officially available. and I gave a presentation there about using on to diagnose a hanging insert statement.

  15. 10. lip 2019.

    Video from the `Let's ` talk we gave with during 2019 (Ottawa, Canada) is up:

  16. 31. svi 2019.

    I'm drafting an RFC for better instrumentation/tracing support in ( / LLVM XRay). Anyone interested in cooperating? Please DM.

  17. 29. svi 2019.

    Did you know we have already 25 presentations on our ? We've covered: , , , , , , , , , , , or . Here comes the question: would you like English subtitles? 🤓

  18. 16. tra 2019.

    Hey developers, would you be interested to see dtrace-generated callstack framegraphs for the tor-daemon for a long-lived and high-capacity tor exit node? Of course, the scripts would be open source. Pondering doing this for . CC: @nusenu_

  19. 15. ožu 2019.

    Die Sticker-Ausbeute im Turmbrauhaus ist etwas Solaris-lastig.

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