Language safety in a multithread environment

Article: Fall Processor Forum 2006: IBM's POWER6
By: S. Rao (sonny.delete@this.burdell.org), October 21, 2006 3:54 pm
Room: Moderated Discussions
Tzvetan Mikov (tmikov@gmail.com) on 10/21/06 wrote:
---------------------------
>S. Rao () on 10/20/06 wrote:
>---------------------------
>>Tzvetan Mikov on 10/20/06 wrote:
>>>Exactly (btw, thanks for the in-depth explanation!). I am not arguing that the
>>>JVM is broken (obviously this isn't a problem on x86 anyway), but that all implementations
>>>of any safe language in a multi-threaded environment have to potentially suffer
>>>a penalty on every alocation. This was a shocking realization, at least to me.
>>>
>>>I can't judge how serious this penalty is. On x86 it is none. Which of the other
>>>non-dead platforms (PPC, Itanium, Sparc?) have relaxed memory ordering and would be affected ?
>>
>>Well, you only need the memory barrier if you make
>>the reference to the object globally visible. This is
>>something the compiler/VM can figure out, so it wouldn't
>>need to apply the write barriers all the time.
>
>You are right. If the compiler can determine that the object is not globally visible,
>it will probably eliminate the allocation completely by replacing it with a stack
>allocation, so there actually won't be any allocation.

Well, it doesn't even need to go that far, it just needs
to add a barrier after a constructor and before any
reference to the newly initialized object escapes
the local scope (if there isn't an implicit barrier already)

If it's locally scoped and the creating thread interacts
with the object before its reference escapes, then the
barrier isn't needed at all (mostly).

Any my hypothesis is that this should be a rare case,
normally you don't want totally un-synchronized access to
newly created shared objects. Even lockless read-only
access implies some kind of barrier for this very reason
(see RCU in the Linux kernel).

This kind of escape analysis is pretty easy to do, so
I'd guess most jit compilers already do it and adding a
barrier after a constructor when needed would be easy.

Even further, object creation is normally an expensive
process anyway, the barrier might be cheap enough that
it amounts to noise in the amount of time it takes
to fully initialize an object. So who knows, maybe
they just always do it. If I can get ahold of a JVM
guy, maybe I can find out what they do on PPC.

>However the scope of such an optimization is extremely limited. In Java it occurs
>so rarely, that it is not that useful in practice, unless you tweak your code purposedly
>for it. I don't think it helps much there. I am not sur eabout other languages.
>
>Also consider that in my example code the data is shared between threads, so it doesn't help there either.
>
>>Power5+ added a little-endian mode and it's possible to
>>add more x86-like behavior too, so x86 isn't necessarily
>>the only answer.
>
>Do they have modes for memory ordering (like Sparc) ?
>

Nope, but maybe it'll be added it if the write barrier
becomes a performance issue. They added a Light-weight
sync (lwysnc) instruction to Power4 to make this a bit
cheaper than a full sync (only orders cached memory
accesses) Probably it really only matters a lot on SMT
processors where you have two threads running on the same
core and sharing a store reorder queue and L1 cache
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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?