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  1. Old Comment

    DebEX Barebone 64 bit Live DVD with Xfce 4.12, released 150228 after three years of work

    Softpedia has written a nice article about DebEX Barebone with Xfce 4.12: “Arne Exton had the pleasure of informing Softpedia earlier today, March 29, about the immediate availability for download of a new build (150329) of his DebEX Barebone computer operating system derived from the upcoming Debian GNU/Linux 8 Jessie distribution and built around the recently released Xfce 4.12 desktop environment”.

    READ MORE: http://news.softpedia.com/news/DebEX...2-476981.shtml
    Posted 03-29-2015 at 03:21 PM by exton exton is offline
  2. Old Comment

    TiddlyWiki bookshelf

    Short follow-up: My tiddlywiki is completely unusable on my android device because of slowness. Another promising option is below.

    http://treeline.bellz.org/scrnsht.html
    Posted 03-28-2015 at 08:58 PM by BenCollver BenCollver is offline
  3. Old Comment

    NUMA, Linus and the Ancient Conundrum

    Is that a feature or a bug?
    Posted 03-28-2015 at 05:17 AM by dijetlo dijetlo is offline
  4. Old Comment

    NUMA, Linus and the Ancient Conundrum

    My wife feels your wife's pain. My Cisco and firewall in our office makes it difficult to maintain a conversation =)
    Posted 03-28-2015 at 04:19 AM by rocket357 rocket357 is offline
  5. Old Comment

    NUMA, Linus and the Ancient Conundrum

    Not at all, Rocket,I got them on Craigslist (there are two however one only has a single processor in it so it's doomed to be a spare parts container) for $150 . It's circa 2004 ish so no support for kernel level virtualization (vt) but it's got a couple of sockets and enough hyperthreads, cache and hard drives for some serious perf'ing fun. Added bonus, they were about to be thrown out by a local charity that provides jobs for the developmentally disabled, so it was a serious "two-fer" as far as I was concerned.
    I got my case plates from the Slackware store yesterday, so it's ready to begin it's new life. One drawback, the wife says it sounds like the vacuum cleaner when I fire it up so I may have to do something about that (the noise... not the wife).
    Posted 03-28-2015 at 02:18 AM by dijetlo dijetlo is offline
    Updated 03-28-2015 at 02:32 AM by dijetlo
  6. Old Comment

    NUMA, Linus and the Ancient Conundrum

    Ahh, I see. I hadn't read much past the email you linked with regards to Linus' commentary on the subject. Thanks for the clarification!

    Good luck with the poweredge. I'd kill for something like that right about now, and I hope to have sufficient funding shortly to be able to do a few virtualization-related projects. Would I be too forward if I asked where you managed to pick up the poweredge? Some place common, like ebay, perhaps? Forgive me if that's too forward =)
    Posted 03-28-2015 at 12:24 AM by rocket357 rocket357 is offline
  7. Old Comment

    NUMA, Linus and the Ancient Conundrum

    That's true, Rocket, except we're talking about shared pages (shmem) when we're talking about NUMA. That's cache memory (L1/L2), not RAM. The issues surrounding NUMA and scheduling deal more with migration of the shared pages between individual processors cache and the threads that are attempting to access them which don't always migrate with them, creating the latency issues.
    Your second paragraph is dead on, btw, except we're just talking about cache, when you access pages in excess of the cache capacity, you're past anything that can be fixed through scheduling (it becomes entirely a bus issue since all locations in RAM are equally distant). Other than that, Kudos.
    A kinda detailed discussion of this problem

    You can NUMA pin a process to a memory location and/or processor, however that makes the linux scheduler less efficient, not more so (giving one set of subjects special access to the Emperor is how revolts and resource choking occur).
    I picked up an ancient dual Xeon processor Poweredge server for some magic beans. I'm a long way from getting it ready for this kind of testing, (it's just sitting there looking at me with that "fix me" expression on it's face) but I hope to make some progress over the weekend on it. I'll be asking a lot of questions on the threads (no doubt) and maybe posting some testing results on here. I hope we get a chance to speak again on this subject.
    Thanks for the comment, always a pleasure talking with you.
    Posted 03-27-2015 at 08:23 PM by dijetlo dijetlo is offline
    Updated 03-27-2015 at 09:04 PM by dijetlo (Sorry guys, I keep finding my mistakes... Maybe I should stop?)
  8. Old Comment

    NUMA, Linus and the Ancient Conundrum

    I thought the issue surrounded the idea of numerous empires (CPUs), each with workers (data in RAM), that need to perform work at a given capital (CPU cache). Everything is happy when the workers are close to the Capitals that need their services, however, when a remote capital has need of wood choppers, and all of the wood choppers take days to get there, it is a performance hit. My understanding is that Linus designed the Linux kernel to relocate workers by predicting what capitals would need them, but no prediction algorithm is 100% accurate.

    Or perhaps Linus was talking about the deeper problem that NUMA attempts to solve, that being multi-CPU RAM access. If all CPUs are on a common bus, only one can effectively use the bus at a given time, potentially starving all other CPUs. NUMA gives each processor its own memory, but when CPUs need to access each others memory there are hits to access times. A workload such as a database would suffer (and then tend to suffer performance hits on NUMA) because each CPU could possibly be working on a given section of RAM at a given time. Workloads like Virtualization, where it is possible to lock VMs to CPUs, could benefit from NUMA moreso than massive databases (Unless the databases are specifically designed to take advantage of a NUMA architecture).

    I could be completely off my rocker (and it wouldn't surprise me if I were), but that was my understanding of NUMA last I dealt with it.
    Posted 03-27-2015 at 07:38 PM by rocket357 rocket357 is offline
  9. Old Comment

    Found someone, you have, I would say, hmmm?

    Ah, ok, I misunderstood.

    I have a friend in my apartment complex (that I computer golf with) that mimics yoda pretty well, too. We'll joke back and forth sometimes either using yoda's lines or our own.
    Posted 03-27-2015 at 03:53 PM by ardvark71 ardvark71 is offline
    Updated 03-27-2015 at 03:57 PM by ardvark71
  10. Old Comment

    Image Magick will open Seattle Film Works (.sfw) photo files

    This is good to know. My dad gave me my first digital camera when my son was born, but I took lots of SLR film pictures because (at the time) the quality was better. I have a stack of Seattle Film Works floppy discs that came with the prints. Of course, I haven't had a floppy disc drive in years.... Thanks for sharing your research.
    Posted 03-27-2015 at 02:25 PM by vmccord vmccord is offline
  11. Old Comment

    Found someone, you have, I would say, hmmm?

    Right, I caught the reference, I was just correcting my own wording to match =P
    Posted 03-27-2015 at 02:22 PM by rocket357 rocket357 is offline
  12. Old Comment

    Found someone, you have, I would say, hmmm?

    Hi...

    That was actually one of yoda's lines in The Empire Strikes Back.

    http://www.imdb.com/character/ch0000015/quotes
    Posted 03-27-2015 at 12:37 PM by ardvark71 ardvark71 is offline
  13. Old Comment

    Found someone, you have, I would say, hmmm?

    Hey ardvark71! Yes, friends indeed. Or rather, "Indeed, friends they are, hmmm"? heh
    Posted 03-27-2015 at 12:22 PM by rocket357 rocket357 is offline
  14. Old Comment
    Posted 03-27-2015 at 11:55 AM by ardvark71 ardvark71 is offline
  15. Old Comment

    SysAdmin "Lack-of-Judgement" Day

    Quote:
    Originally Posted by dijetlo View Comment
    just try to think of all the nice security patches you got...
    Indeed. There were a few tor denial of service vulnerabilities released a few days ago, so upgrading to the latest on the 0.2.5 branch was quite welcome =)
    Posted 03-26-2015 at 06:09 PM by rocket357 rocket357 is offline
  16. Old Comment

    ARM experiments awaiting

    Quote:
    within my LAB
    ENOUGH!!!
    There is only so much envy one man should have to struggle with....

    I was looking at your link and this...
    http://ameridroid.com/products/odroid-xu3-lite

    USB 3... bus level clustering... be still my foolish heart...
    Thanks for the link
    PS, the wife already hates you.
    Posted 03-26-2015 at 05:25 PM by dijetlo dijetlo is offline
  17. Old Comment

    Red Hat 5.7

    Glad to see you got through the install, I tend to work with Cent or SL on home projects specifically because of the issues associated with building your own repository and setting up a sat server, creating channels, etc. etc.

    VMMCORD is correct on both counts, Holy Cow is a common English phrase meaning "goodness gracious" or "wow" and I think your blogs color scheme may cause eye cancer...

    Still, it's definitely memorable.
    Posted 03-26-2015 at 04:54 PM by dijetlo dijetlo is offline
    Updated 03-28-2015 at 07:36 AM by dijetlo
  18. Old Comment

    SysAdmin "Lack-of-Judgement" Day

    Quote:
    what's the worst that could happen, afterall?
    I too am often surprised by the answer to that question. Glad to see you wrestled her back on her feet, just try to think of all the nice security patches you got...
    Posted 03-26-2015 at 04:50 PM by dijetlo dijetlo is offline
  19. Old Comment

    SysAdmin "Lack-of-Judgement" Day

    Yay! All fixed. Well, I now have less than 1/3 of the flash remaining, but silcd and tor are back up and operational.

    Don't build ports on a BBB. Not on the flash, at least =\
    Posted 03-25-2015 at 04:40 PM by rocket357 rocket357 is offline
  20. Old Comment

    Red Hat 5.7

    It's a mild interjection, like Wow.
    Posted 03-25-2015 at 02:39 PM by vmccord vmccord is offline

  



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