Language safety in a multithread environment

Article: Fall Processor Forum 2006: IBM's POWER6
By: Rob Thorpe (rthorpe.delete@this.realworldtech.com), October 26, 2006 10:45 am
Room: Moderated Discussions
Gabriele Svelto (gabriele.svelto@gmail.com) on 10/26/06 wrote:
---------------------------
>Linus Torvalds (torvalds@osdl.org) on 10/25/06 wrote:
>---------------------------
>>Well, I don't think "safe languages" per se is the
>>problem. "Strange threaded languages with certain models
>>of memory ordering, apparently including Java" - yes.
>
>No, the problems relies in the 'safety' part of the language. Actually the fact
>that Java has a memory model is a Good Thing (tm). Not having it means that you
>are not really sure how to handle corner cases, one of the extremes being C where
>there is no language support for threads (or almost none in C99). What optimization
>are legal around locks and the like are hard to discern as they are in the realm
>of unspecified - or plain wrong - behaviour. The problem with Java is that the safety
>of the language relies on the fact that code will never ever touch data which has
>not been properly initialized. The application code cannot mess data as it would
>be unverifiable and the VM must ensure that whathever it passes to the user has
>been properly initialized and that's were the barrier rolls in since the language
>is multi-threaded and you must ensure consistency.

Yes.

>>The kernel doesn't do a lot of lockless stuff, so it's
>>all generally ok. Almost always, when you actually expose
>>a piece of data structure globally, you need to lock the
>>data structure that you expose it in, so you do
>>have locking between "exposer" and "the rest of the world".
>>
>>Quite frankly, I don't understand how you can avoid it
>>either. Your example with "GlobalPtr" didn't make much
>>sense from a real example standpoint, since normally you'd
>>not have one global pointer, you'd have a hash-table or
>>linked list or somethign else that you expose new entries
>>throgh, and that data structure needs locking
>>anyway.
>
>That's not always true, and in fact it's a case that often arises in allocators.
>Think of a structure that may grow but never shrinks and you cannot ask for an element
>inside of it without asking a writer thread to add it. The writer thread could write
>to the structure atomically without locking, readers would also not need to lock
>the structure. You'd have a lock for example in the message queue used by the reader
>threads to ask for a write from the writer thread but not around the structure itself.
>A good example is a radix-tree mapping the pages used by the allocator, with the
>writer having the responsibility of adding pages to the radix tree and readers using
>them to get information on the pages.
>
>Now you wouldn't write an allocator in a managed language but the example still
>stands. If you have a very large shared structure with lots and lots of reads and
>little or no writes even a read-only lock can severy hamper scalability. Naturally
>avoiding locking also often means shooting yourself in the foot but still there are cases where you might consider it.

I think this and S.Rao's post show us the real cost in safe languages of a computer not ordering stores.

If the machine doesn't order stores then the language VM can:
* Put memory barriers around constructors where the objs could be used in another thread
* Check if the programmer hasn't mutexed the thing being constructed straight afterwards. If they have then remove the barriers since they'll be duplicated later.

So the pain being encountered is that in the case where no barrier is needed one must be introduced. I think this case must be fairly rare though. The above optimization though also means that being able to choose if any old variable is put into another thread dynamically at runtime is very difficult.

Probably the true pain is figuring this stuff out. I bet if the folks in this thread charged consultancy rates for posting in it then Tzvetan would have to remortage his house by now ;).

(I could be completely out-to-lunch though, since I'm not out-to-lunch and therefore hungry and not thinking straight.)
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
POWER6 article onlineDavid Kanter2006/10/16 10:31 PM
  POWER6 article onlineNiels Jørgen Kruse2006/10/16 11:59 PM
    POWER6 article onlineDavid Kanter2006/10/17 12:03 AM
      Interesting cachesPaul Aaron Clayton2006/10/17 06:35 AM
  POWER6 article onlinerwessel2006/10/17 12:17 AM
    POWER6 article onlineGabriele Svelto2006/10/17 12:49 AM
      POWER6 article onlinerwessel2006/10/17 12:55 AM
      POWER6 article onlineDavid Kanter2006/10/17 01:01 AM
        POWER6 article onlineGabriele Svelto2006/10/17 01:06 AM
  BCD arithmetic remarkRob Thorpe2006/10/17 06:57 AM
    BCD arithmetic remarkDavid Kanter2006/10/17 08:04 AM
      BCD arithmetic remarkRob Thorpe2006/10/17 08:33 AM
        Java perfSerge Monkewitz2006/10/17 12:25 PM
          Java perfRob Thorpe2006/10/18 04:27 AM
            Java perfsp2006/10/18 04:50 AM
              Java perfRob Thorpe2006/10/18 08:36 AM
                Data parallelism in .NET using GPUsStephen Goss2006/10/18 11:48 PM
                  Data parallelism in .NET using GPUssp2006/10/19 01:08 AM
                    Data parallelism in .NET using GPUsStephen Goss2006/10/21 02:22 AM
                      Data parallelism in .NET using GPUsfastpathguru2006/11/01 02:30 PM
                        Data parallelism in .NET using GPUsIan Ameline2006/11/01 05:31 PM
                Java perfGabriele Svelto2006/10/19 12:23 AM
                  Java perfRob Thorpe2006/10/19 02:58 AM
              Numerical Java perfWes Felter2006/10/18 10:25 AM
                Numerical Java perfsp2006/10/18 10:46 AM
                  Numerical Java perfRob Thorpe2006/10/18 11:23 AM
                    Numerical Java perfTzvetan Mikov2006/10/18 11:44 AM
                      Numerical Java perfRob Thorpe2006/10/19 04:30 AM
                        Numerical Java perfsp2006/10/19 05:22 AM
                          Numerical Java perfGabriele Svelto2006/10/19 05:33 AM
                          Numerical Java perfRob Thorpe2006/10/19 07:08 AM
                            Numerical Java perfJuho Snellman2006/10/20 08:38 AM
                              Numerical Java perfRob Thorpe2006/10/23 04:54 AM
                                SBCL garbage collectorJuho Snellman2006/10/25 03:29 AM
                          Numerical Java perfTzvetan Mikov2006/10/19 09:04 AM
                        Language safety in a multithread environmentTzvetan Mikov2006/10/19 09:34 AM
                          Language safety in a multithread environmentRicardo B2006/10/19 11:43 AM
                            Language safety in a multithread environmentTzvetan Mikov2006/10/19 12:11 PM
                              Language safety in a multithread environmentRicardo B2006/10/19 02:23 PM
                                Language safety in a multithread environmentTzvetan Mikov2006/10/19 04:08 PM
                                  Language safety in a multithread environmentRicardo B2006/10/20 05:04 AM
                                    Language safety in a multithread environmentTzvetan Mikov2006/10/20 01:53 PM
                                      Language safety in a multithread environmentRicardo B2006/10/20 02:06 PM
                                      PSRicardo B2006/10/20 02:12 PM
                                        PSTzvetan Mikov2006/10/20 03:30 PM
                          Language safety in a multithread environmentGabriele Svelto2006/10/20 01:26 AM
                            Language safety in a multithread environmentTzvetan Mikov2006/10/20 01:34 PM
                              Language safety in a multithread environmentS. Rao2006/10/20 08:39 PM
                                Language safety in a multithread environmentTzvetan Mikov2006/10/21 09:39 AM
                                  Language safety in a multithread environmentS. Rao2006/10/21 03:54 PM
                                    Language safety in a multithread environmentRicardo B2006/10/21 04:45 PM
                                    Language safety in a multithread environmentTzvetan Mikov2006/10/22 09:42 AM
                                      Language safety in a multithread environmentRob Thorpe2006/10/23 09:35 AM
                                        Language safety in a multithread environmentLinus Torvalds2006/10/23 04:06 PM
                                          Language safety in a multithread environmentTzvetan Mikov2006/10/23 11:55 PM
                                            Language safety in a multithread environmentLinus Torvalds2006/10/24 07:35 AM
                                              Language safety in a multithread environmentTzvetan Mikov2006/10/24 11:26 AM
                                                ClarificationTzvetan Mikov2006/10/24 12:15 PM
                                                Language safety in a multithread environmentLinus Torvalds2006/10/25 07:37 AM
                                                  Language safety in a multithread environmentRob Thorpe2006/10/25 07:52 AM
                                                  Language safety in a multithread environmentTzvetan Mikov2006/10/25 09:01 AM
                                                    Language safety in a multithread environmentLinus Torvalds2006/10/25 05:24 PM
                                                      Language safety in a multithread environmentS. Rao2006/10/25 06:08 PM
                                                        Other approachesRob Thorpe2006/10/26 10:09 AM
                                                          Hang on I forgot the other approachesRob Thorpe2006/10/26 10:27 AM
                                                            Hang on I forgot the other approachesS. Rao2006/10/26 02:16 PM
                                                      Language safety in a multithread environmentGabriele Svelto2006/10/26 03:56 AM
                                                        Language safety in a multithread environmentLinus Torvalds2006/10/26 07:52 AM
                                                          Language safety in a multithread environmentGabriele Svelto2006/10/26 08:11 AM
                                                            "Safety" and different types of safetyRob Thorpe2006/10/26 08:58 AM
                                                              "Safety" and different types of safetyLinus Torvalds2006/10/26 09:26 AM
                                                                "Safety" and different types of safetyRob Thorpe2006/10/26 09:50 AM
                                                                  "Safety" and different types of safetyTzvetan Mikov2006/10/26 10:56 AM
                                                                    Exactly!Gabriele Svelto2006/10/27 12:29 AM
                                                                  message passing languagesFoo_2006/10/28 01:19 AM
                                                        Language safety in a multithread environmentRob Thorpe2006/10/26 10:45 AM
                                                          RecapTzvetan Mikov2006/10/26 11:19 AM
                                                            Information and ickiness on JavaRob Thorpe2006/10/27 04:38 AM
                                                              Excellent threadJasonB2006/10/27 02:57 PM
                                                                Excellent threadsp2006/10/28 12:38 AM
                                                              Information and ickiness on JavaTzvetan Mikov2006/10/27 05:12 PM
                                                      Language safety in a multithread environmentTzvetan Mikov2006/10/26 08:17 AM
                                                        Language safety in a multithread environmentLinus Torvalds2006/10/26 08:57 AM
                                                          Language safety in a multithread environmentRob Thorpe2006/10/26 09:38 AM
                                                            Language safety in a multithread environmentS. Rao2006/10/26 02:51 PM
                                                              Language safety in a multithread environmentRob Thorpe2006/10/27 01:26 AM
                                                                Language safety in a multithread environmentLinus Torvalds2006/10/27 08:40 AM
                                                                  Language safety in a multithread environmentRob Thorpe2006/10/27 09:06 AM
                                                                    Language safety in a multithread environmentLinus Torvalds2006/10/27 10:53 AM
                                                                      Language safety in a multithread environmentrwessel2006/10/27 03:21 PM
                                                                        Explicit vs implicit barriersTzvetan Mikov2006/10/27 05:39 PM
                                                                          Explicit vs implicit barriersLinus Torvalds2006/10/27 06:28 PM
                                                                            Explicit vs implicit barriersTzvetan Mikov2006/10/28 06:02 PM
                                                                              Explicit vs implicit barriersLinus Torvalds2006/10/28 07:55 PM
                                                                                Explicit vs implicit barriersRob Thorpe2006/10/31 12:37 PM
                                                                            Explicit vs implicit barriersRob Thorpe2006/10/31 12:15 PM
                                                                          Explicit vs implicit barriersrwessel2006/10/27 06:39 PM
                                                                      Why OoO stores are evil but OoO loads are o.k.?Michael S2006/10/28 02:10 PM
                                                                        Why OoO stores are evil but OoO loads are o.k.?Linus Torvalds2006/10/28 04:29 PM
                                                                          Why OoO stores are evil but OoO loads are o.k.?Ricardo B2006/10/30 06:36 AM
                                                                            Why OoO stores are evil but OoO loads are o.k.?Linus Torvalds2006/10/30 09:57 AM
                                                                              Why OoO stores are evil but OoO loads are o.k.?Tzvetan Mikov2006/10/30 11:55 AM
                                                                                Why OoO stores are evil but OoO loads are o.k.?Michael S2006/10/30 12:14 PM
                                                                                  Why OoO stores are evil but OoO loads are o.k.?Tzvetan Mikov2006/10/30 12:20 PM
                                                                                    Why OoO stores are evil but OoO loads are o.k.?Michael S2006/10/30 01:11 PM
                                                                                      A reference would be nice :-) (NT)Tzvetan Mikov2006/10/30 01:32 PM
                                                                                        A reference Michael S2006/10/30 03:37 PM
                                                                                          A reference Tzvetan Mikov2006/11/03 08:57 PM
                                                                                            check your e-mbox (NT)Michael S2006/11/04 12:47 PM
                                                                                      Why OoO stores are evil but OoO loads are o.k.?David Kanter2006/10/30 01:40 PM
                                                                                        Why OoO stores are evil but OoO loads are o.k.?Michael S2006/10/30 02:28 PM
                                                                                          Why OoO stores are evil but OoO loads are o.k.?David Kanter2006/10/30 02:43 PM
                                                                                            Why OoO stores are evil but OoO loads are o.k.?Michael S2006/10/30 04:36 PM
                                                                                              Why OoO stores are evil but OoO loads are o.k.?David Kanter2006/10/30 10:14 PM
                                                                                Why OoO stores are evil but OoO loads are o.k.?Linus Torvalds2006/10/30 12:53 PM
                                                                      Language safety in a multithread environmentRob Thorpe2006/10/31 11:25 AM
                                                                        Language safety in a multithread environmentLinus Torvalds2006/10/31 12:59 PM
                                                                          Language safety in a multithread environmentRob Thorpe2006/10/31 01:38 PM
                                                                            Language safety in a multithread environmentLinus Torvalds2006/10/31 02:02 PM
                                                                              Language safety in a multithread environmentLinus Torvalds2006/10/31 03:54 PM
                                                                                Will reply tommorrow, very busy today (NT)Rob Thorpe2006/11/01 11:14 AM
                                                                              Language safety in a multithread environmentRob Thorpe2006/11/02 01:30 PM
                                                                                Language safety in a multithread environmentrwessel2006/11/02 02:06 PM
                                                                                  Language safety in a multithread environmentGabriele Svelto2006/11/03 02:39 AM
                                                                                    Language safety in a multithread environmentLinus Torvalds2006/11/03 09:40 AM
                                                                                      Language safety in a multithread environmentGabriele Svelto2006/11/03 10:12 AM
                                                                                        Language safety in a multithread environmentLinus Torvalds2006/11/03 01:20 PM
                                                                                          Language safety in a multithread environmentGabriele Svelto2006/11/06 03:42 AM
                                                                                      Language safety in a multithread environmentEric Bron2006/11/04 04:47 AM
                                                                                        Language safety in a multithread environmentGabriele Svelto2006/11/06 04:13 AM
                                                                                      Language safety in a multithread environmentWilco2006/11/04 12:29 PM
                                                                                        Language safety in a multithread environmentRicardo B2006/11/04 02:54 PM
                                                                                        Language safety in a multithread environmentGabriele Svelto2006/11/06 03:54 AM
                                                                                          Language safety in a multithread environmentWilco2006/11/06 12:26 PM
                                                                                            Language safety in a multithread environmentGabriele Svelto2006/11/07 01:54 AM
                                                                                              Language safety in a multithread environmentWilco2006/11/07 04:34 PM
                                                                                                Language safety in a multithread environmentGabriele Svelto2006/11/08 02:29 AM
                                                                                      Language safety in a multithread environmentrwessel2006/11/04 10:13 PM
                                                                                        Language safety in a multithread environmentrwessel2006/11/04 10:23 PM
                                                                                      Language safety in a multithread environmentMichael S2006/11/05 04:05 AM
                                                                                        Language safety in a multithread environmentLinus Torvalds2006/11/05 10:14 AM
                                                                                          unaligned SSE testsEric Bron2006/11/05 02:26 PM
                                                                                            unaligned SSE testsMichael S2006/11/05 03:47 PM
                                                                                              unaligned SSE testsEric Bron2006/11/05 04:23 PM
                                                                                                unaligned SSE testsMichael S2006/11/05 05:03 PM
                                                                                                  unaligned SSE testsEric Bron2006/11/05 05:28 PM
                                                                                                    Now results make sense. How about Psc? (NT)Michael S2006/11/05 05:37 PM
                                                                                                      tomorrow, it's 01:43 PM where I'm (NT)Eric Bron2006/11/05 05:44 PM
                                                                                                        I mean 01:43 AM (NT)Eric Bron2006/11/05 05:45 PM
                                                                                                      PSC scoresEric Bron2006/11/06 02:25 AM
                                                                                                        PSC scoresMichael S2006/11/06 04:28 AM
                                                                                                          PSC scoresIan Ameline2006/11/06 09:00 AM
                                                                                                            meaningful performance gainMichael S2006/11/06 09:33 AM
                                                                                                              meaningful performance gainLinus Torvalds2006/11/06 11:15 AM
                                                                                                                Dynamically resolved alignmentDavid Kanter2006/11/06 12:49 PM
                                                                                                                  Dynamically resolved alignmentRicardo B2006/11/06 01:46 PM
                                                                                                                  Dynamically resolved alignmentLinus Torvalds2006/11/06 01:48 PM
                                                                                                                meaningful performance gainEric Bron2006/11/07 02:23 AM
                                                                                                        RE: "I suppose we will have to continue to align" ...Not really :)redpriest2006/11/06 05:11 PM
                                                                                                          Your point?Michael S2006/11/06 05:47 PM
                                                                                                            Actually Michael, it's quite a bit more than that.redpriest2006/11/06 06:30 PM
                                                                                                              Actually Michael, it's quite a bit more than that.anonymous2006/11/06 08:36 PM
                                                                                                                Actually Michael, it's quite a bit more than that.Linus Torvalds2006/11/06 09:01 PM
                                                                                                                  Actually Michael, it's quite a bit more than that.Rob Thorpe2006/11/07 03:31 AM
                                                                                                                  Actually Michael, it's quite a bit more than that.anonymous2006/11/07 07:27 AM
                                                                                                              link vs linqMichael S2006/11/07 02:04 AM
                                                                                                                link vs linqanonymous2006/11/07 07:13 AM
                                                                                                                  Thank you (NT)Michael S2006/11/07 08:04 AM
                                                                                                          Barcelona dreamsEric Bron2006/11/07 01:08 AM
                                                                                          Language safety in a multithread environmentWilco2006/11/05 03:14 PM
                                                                                            Language safety in a multithread environmentRicardo B2006/11/05 03:56 PM
                                                                                              Language safety in a multithread environmentWilco2006/11/05 06:52 PM
                                                                                                Language safety in a multithread environmentRicardo B2006/11/05 09:09 PM
                                                                                                  Language safety in a multithread environmentWilco2006/11/06 02:25 PM
                                                                                                    Language safety in a multithread environmentRicardo B2006/11/06 03:48 PM
                                                                                                      Language safety in a multithread environmentWilco2006/11/06 04:44 PM
                                                                                                        Language safety in a multithread environmentRicardo B2006/11/06 04:53 PM
                                                                                                        A common problemRob Thorpe2006/11/07 09:45 AM
                                                                                                          A common problemWilco2006/11/09 04:46 PM
                                                                                                            A common problemRob Thorpe2006/11/10 08:29 AM
                                                                                                              A common problemrwessel2006/11/13 04:47 PM
                                                                                                                A common problemWilco2006/11/13 05:51 PM
                                                                                                                  A common problemRob Thorpe2006/11/14 03:38 AM
                                                                                                                    A common problemLinus Torvalds2006/11/14 09:37 AM
                                                                                                                      A common problemRob Thorpe2006/11/14 11:18 AM
                                                                                                                        A common problemagony2006/11/14 02:57 PM
                                                                                                                          A common problemrwessel2006/11/14 04:13 PM
                                                                                                                            A common problemAndi Kleen2006/11/15 04:24 AM
                                                                                                                              A common problemrwessel2006/11/15 04:42 PM
                                                                                                                        A common problemDoug Siebert2006/11/14 09:50 PM
                                                                                                                          x86 versus other platformsDavid Kanter2006/11/15 12:58 AM
                                                                                                                            x86 versus other platformsj2006/11/15 01:57 AM
                                                                                                                          A common problemRob Thorpe2006/11/15 11:56 AM
                                                                                                                            A common problemWilco2006/11/15 01:54 PM
                                                                                                                              A common problemCarlie Coats2006/11/16 06:44 AM
                                                                                                                              A common problemLinus Torvalds2006/11/16 10:03 AM
                                                                                                                      A common problemCarlie Coats2006/11/16 06:38 AM
                                                                                                                        A common problemRob Thorpe2006/11/16 07:29 AM
                                                                                                                    A common problemWilco2006/11/15 02:13 PM
                                                                                                                      A common problemRob Thorpe2006/11/16 09:20 AM
                                                                                                                        A common problemrwessel2006/11/16 04:27 PM
                                                                                                                        A common problemWilco2006/11/17 02:20 PM
                                                                                                                          A common problemRob Thorpe2006/11/20 04:14 AM
                                                                                          You are aiming too lowMichael S2006/11/05 04:19 PM
                                                                                            And you're aiming quite highRob Thorpe2006/11/06 08:00 AM
                                                                                    Language safety in a multithread environmentWilco2006/11/04 11:20 AM
                                                                                      Language safety in a multithread environmentGabriele Svelto2006/11/06 04:10 AM
                                                                                        Language safety in a multithread environmentWilco2006/11/06 10:59 AM
                                                                                          Language safety in a multithread environmentGabriele Svelto2006/11/08 02:47 AM
                                                                                            Language safety in a multithread environmentWilco2006/11/13 05:13 PM
                                                                                              Language safety in a multithread environmentGabriele Svelto2006/11/14 02:15 AM
                                                                                                Language safety in a multithread environmentWilco2006/11/17 02:51 PM
                                                                                    Language safety in a multithread environmentrwessel2006/11/04 10:11 PM
                                                                                  Language safety in a multithread environmentRob Thorpe2006/11/03 09:58 AM
                                                                  Language safety in a multithread environmentbandwidth2006/10/27 06:47 PM
                                                                    Language safety in a multithread environmentLinus Torvalds2006/10/27 07:52 PM
                                                                      Language safety in a multithread environmentLinus Torvalds2006/10/27 08:10 PM
                                                                        Language safety in a multithread environmentbandwidth2006/10/28 03:17 AM
                                                                      Language safety in a multithread environmentbandwidth2006/10/28 03:09 AM
                                                                        Language safety in a multithread environmentLinus Torvalds2006/10/28 09:23 AM
                                                                      Language safety in a multithread environmentGabriele Svelto2006/10/30 03:26 AM
                                                                        Language safety in a multithread environmentRicardo B2006/10/30 06:52 AM
                                                                        Language safety in a multithread environmentJasonB2006/10/30 07:12 AM
                                                                          Language safety in a multithread environmentGabriele Svelto2006/10/30 07:28 AM
                                                                            Language safety in a multithread environmentJasonB2006/10/30 08:32 AM
                                                                              Language safety in a multithread environmentGabriele Svelto2006/10/30 08:48 AM
                                                                                Language safety in a multithread environmentJasonB2006/10/30 09:21 AM
                                                                          Language safety in a multithread environmentRicardo B2006/10/30 07:31 AM
                                                                            Language safety in a multithread environmentGabriele Svelto2006/10/30 07:43 AM
                                                                              Language safety in a multithread environmentRicardo B2006/10/30 07:54 AM
                                                                                Language safety in a multithread environmentGabriele Svelto2006/10/30 08:02 AM
                                                                                  Language safety in a multithread environmentRicardo B2006/10/30 08:12 AM
                                                                                    Language safety in a multithread environmentGabriele Svelto2006/10/30 08:29 AM
                                                                                      Language safety in a multithread environmentRicardo B2006/10/30 08:40 AM
                                                                                Language safety in a multithread environmentdraugaz2006/10/30 12:31 PM
                                                                              Language safety in a multithread environmentLinus Torvalds2006/10/30 10:09 AM
                                                                                Language safety in a multithread environmentGabriele Svelto2006/10/31 02:01 AM
                                                                                  Language safety in a multithread environmentLinus Torvalds2006/10/31 08:59 AM
                                                                    Language safety in a multithread environmentpgerassi2006/10/27 08:00 PM
                                                                      Language safety in a multithread environmentbandwidth2006/10/28 03:25 AM
                                                                        Language safety in a multithread environmentpgerassi2006/10/31 01:32 AM
                                                                      Language safety in a multithread environmentRob Thorpe2006/10/31 06:52 AM
                                                        pythonFoo_2006/10/28 01:51 AM
                                                          pythonTzvetan Mikov2006/10/28 04:55 PM
                                                            pythonFoo_2006/10/29 03:51 AM
                                                          pythonRob Thorpe2006/10/31 05:01 AM
                                        Language safety in a multithread environmentTzvetan Mikov2006/10/24 10:53 AM
                                          Language safety in a multithread environmentRob Thorpe2006/10/25 01:00 AM
                                          Language safety in a multithread environment (Lock-free structures)Ray2006/10/28 11:25 AM
                                            Language safety in a multithread environment (Lock-free structures)Linus Torvalds2006/10/28 11:58 AM
                                              Language safety in a multithread environment (Lock-free structures)Ray2006/10/28 04:47 PM
                                                Language safety in a multithread environment (Lock-free structures)Linus Torvalds2006/10/28 08:02 PM
                                        Language safety in a multithread environmentJuho Snellman2006/10/25 03:59 AM
                                          Language safety in a multithread environmentRob Thorpe2006/10/25 04:38 AM
                                            Language safety in a multithread environmentJuho Snellman2006/10/25 06:38 AM
                                              Language safety in a multithread environmentRob Thorpe2006/10/25 07:06 AM
                                                More on this topicRob Thorpe2006/10/25 08:41 AM
                                                  More on this topicTzvetan Mikov2006/10/25 10:17 AM
                                                    More on this topicRob Thorpe2006/10/26 02:02 AM
                                                Language safety in a multithread environmentJuho Snellman2006/10/25 10:33 AM
                                                  Language safety in a multithread environmentRob Thorpe2006/10/26 01:48 AM
                                      Language safety in a multithread environmentS. Rao2006/10/23 03:40 PM
                                        Language safety in a multithread environmentTzvetan Mikov2006/10/23 11:38 PM
                                        Language safety in a multithread environmentGabriele Svelto2006/10/24 01:02 AM
                                          Language safety in a multithread environmentS. Rao2006/10/24 12:40 PM
                                        Comparison to stack allocationRob Thorpe2006/10/24 03:09 AM
                                          Comparison to stack allocationS. Rao2006/10/24 12:32 PM
                                            Exactly, see my other post (NT)Rob Thorpe2006/10/25 12:53 AM
                          Language safety in a multithread environmentDavid Wragg2006/10/20 02:46 AM
                            Language safety in a multithread environmentTzvetan Mikov2006/10/21 09:24 AM
                          Ugh, evil problemRob Thorpe2006/10/20 03:56 AM
                            Ugh, evil problemGabriele Svelto2006/10/20 04:38 AM
                              Ugh, evil problemRob Thorpe2006/10/20 05:47 AM
                                Ugh, evil problemGabriele Svelto2006/10/20 05:54 AM
                                Ugh, evil problemRicardo B2006/10/20 06:43 AM
                            Ugh, evil problemJasonB2006/10/20 06:17 AM
                              Ugh, evil problemS. Rao2006/10/20 08:09 PM
                                Ugh, evil problemJasonB2006/10/21 07:58 AM
                                SecondedRob Thorpe2006/10/23 01:53 AM
                          Copying GC Rob Thorpe2006/10/23 02:51 AM
                            Copying GC Tzvetan Mikov2006/10/23 11:13 PM
                              Copying GC Rob Thorpe2006/10/24 01:22 AM
              Python + native extensionsFoo_2006/10/18 02:29 PM
                Python + native extensionssp2006/10/19 01:05 AM
  z9 - Power5 connection?foobar2006/10/17 01:15 PM
    z9 - Power5 connection?David Kanter2006/10/17 02:03 PM
      z9 - Power5 connection?foobar2006/10/17 02:33 PM
        z9 - Power5 connection?rwessel2006/10/17 07:39 PM
          z9 - Power5 connection?foobar2006/10/17 08:38 PM
            Sounds like I should edit the article...David Kanter2006/10/17 10:48 PM
            z9 - Power5 connection?Jesper Frimann2006/10/17 11:59 PM
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How do you spell avocado?