| Time |
S |
Nick |
Message |
| 07:22 |
|
|
mmatloka` joined #virtualJUG |
| 07:26 |
|
|
_ollie joined #virtualJUG |
| 07:52 |
|
|
slaskawi joined #virtualJUG |
| 08:15 |
|
|
_ollie joined #virtualJUG |
| 08:19 |
|
|
pfrobinson joined #virtualJUG |
| 08:28 |
|
|
TheShade joined #virtualJUG |
| 08:54 |
|
|
TheShade joined #virtualJUG |
| 08:54 |
|
TheShade |
So, how does it work for speakers? Am I supposed to use Hangouts? |
| 09:00 |
|
|
Bevin joined #virtualJUG |
| 09:52 |
|
|
vladko joined #virtualJUG |
| 10:22 |
|
|
pfrobinson joined #virtualJUG |
| 10:34 |
|
|
shade__ joined #virtualJUG |
| 10:47 |
|
|
Bevin joined #virtualJUG |
| 12:15 |
|
|
isopov joined #virtualJUG |
| 14:04 |
|
|
pfrobinson_ joined #virtualJUG |
| 14:43 |
|
|
pfrobinson_ joined #virtualJUG |
| 14:49 |
|
|
Bevin joined #virtualJUG |
| 14:55 |
|
|
ivansopov joined #virtualJUG |
| 14:56 |
|
|
ivansopov left #virtualJUG |
| 15:10 |
|
|
Bevin joined #virtualJUG |
| 15:20 |
|
|
algon joined #virtualJUG |
| 15:25 |
|
|
TheShade joined #virtualJUG |
| 15:26 |
|
TheShade |
Starting in 90 minutes... |
| 15:35 |
|
|
dexjen joined #virtualJUG |
| 15:37 |
|
|
edburns joined #virtualJUG |
| 15:55 |
|
|
fmey joined #virtualJUG |
| 15:58 |
|
|
neven joined #virtualJUG |
| 15:59 |
|
|
nevenc left #virtualJUG |
| 15:59 |
|
|
pressafc joined #virtualJUG |
| 16:01 |
|
|
alxs joined #virtualJUG |
| 16:05 |
|
|
Kaye joined #virtualJUG |
| 16:07 |
|
|
yob joined #virtualJUG |
| 16:07 |
|
|
Bevin joined #virtualJUG |
| 16:09 |
|
|
alxs joined #virtualJUG |
| 16:17 |
|
|
isopov joined #virtualJUG |
| 16:18 |
|
|
shade__ joined #virtualJUG |
| 16:18 |
|
|
dexjen joined #virtualJUG |
| 16:24 |
|
|
slavik2 joined #virtualJUG |
| 16:28 |
|
|
OSt joined #virtualJUG |
| 16:29 |
|
|
OStrekalovsky joined #virtualJUG |
| 16:29 |
|
|
gvsmirnov joined #virtualJUG |
| 16:31 |
|
|
Fuud joined #virtualJUG |
| 16:32 |
|
|
alxs joined #virtualJUG |
| 16:38 |
|
|
slavik2 joined #virtualJUG |
| 16:39 |
|
|
pm771 joined #virtualJUG |
| 16:39 |
|
|
byteblender joined #virtualJUG |
| 16:39 |
|
|
Tushar joined #virtualJUG |
| 16:39 |
|
Tushar |
Hello all !!! |
| 16:40 |
|
|
hax0r1337 joined #virtualJUG |
| 16:41 |
|
|
romeokienzler joined #virtualJUG |
| 16:41 |
|
TheShade |
Hi |
| 16:41 |
|
hax0r1337 |
hell0, is thi$ the virtual b33r party? |
| 16:41 |
|
TheShade |
Everyone is ready? :) |
| 16:41 |
|
|
beobal joined #virtualJUG |
| 16:42 |
|
|
Kedar joined #virtualJUG |
| 16:42 |
|
|
shelajev joined #virtualJUG |
| 16:44 |
|
|
Kedar joined #virtualJUG |
| 16:46 |
|
shelajev |
hello people |
| 16:46 |
|
|
Son joined #virtualJUG |
| 16:47 |
|
|
tdias joined #virtualJUG |
| 16:47 |
|
|
swanson_ joined #virtualJUG |
| 16:47 |
|
OStrekalovsky |
hi |
| 16:48 |
|
|
Jerith666 joined #virtualJUG |
| 16:48 |
|
|
eswanson joined #virtualJUG |
| 16:49 |
|
|
_DaveB_ joined #virtualJUG |
| 16:49 |
|
|
sparko joined #virtualJUG |
| 16:49 |
|
gvsmirnov |
Cheers! |
| 16:49 |
|
|
fuubar joined #virtualJUG |
| 16:49 |
|
|
sparko21 joined #virtualJUG |
| 16:50 |
|
|
radcortez joined #virtualJUG |
| 16:50 |
|
|
Didier joined #virtualJUG |
| 16:50 |
|
|
sparko left #virtualJUG |
| 16:50 |
|
|
sparko joined #virtualJUG |
| 16:51 |
|
|
tdias joined #virtualJUG |
| 16:51 |
|
|
MikeT joined #virtualJUG |
| 16:51 |
|
|
cjwebb_ joined #virtualJUG |
| 16:51 |
|
|
HarmeetSingh joined #virtualJUG |
| 16:51 |
|
|
tori3852 joined #virtualJUG |
| 16:51 |
|
|
madorb joined #virtualJUG |
| 16:52 |
|
|
Ado joined #virtualJUG |
| 16:52 |
|
|
tellisnz joined #virtualJUG |
| 16:52 |
|
|
Adil joined #virtualJUG |
| 16:52 |
|
|
tdias joined #virtualJUG |
| 16:53 |
|
|
Aggelos joined #virtualJUG |
| 16:53 |
|
|
thanks joined #virtualJUG |
| 16:53 |
|
|
kostiu joined #virtualJUG |
| 16:53 |
|
|
Mayol joined #virtualJUG |
| 16:54 |
|
Kedar |
hello shelajev, hello everyone! |
| 16:54 |
|
|
Swietopel joined #virtualJUG |
| 16:54 |
|
|
SimonSays joined #virtualJUG |
| 16:55 |
|
|
Slash joined #virtualJUG |
| 16:55 |
|
|
ml10 joined #virtualJUG |
| 16:55 |
|
|
alxs joined #virtualJUG |
| 16:55 |
|
|
ml10 joined #virtualJUG |
| 16:56 |
|
|
namanshah joined #virtualJUG |
| 16:56 |
|
Kedar |
Does anyone know if we are following http://shipilev.net/talks/narnia-2555-jmm-pragmatics-en.pdf ? |
| 16:56 |
|
|
nickolay joined #virtualJUG |
| 16:56 |
|
|
vk joined #virtualJUG |
| 16:56 |
|
|
gaponov joined #virtualJUG |
| 16:57 |
|
|
houblon joined #virtualJUG |
| 16:57 |
|
|
joshuaw joined #virtualJUG |
| 16:57 |
|
|
stevex joined #virtualJUG |
| 16:57 |
|
TheShade |
Kedar, yes, we do. However, don't look there, SPOILERS! |
| 16:57 |
|
Kedar |
oh, i see, np, thanks TheShade. |
| 16:58 |
|
|
Mattia joined #virtualJUG |
| 16:59 |
|
HarmeetSingh |
hello @simon and all @vjug members |
| 16:59 |
|
|
ado_ joined #virtualJUG |
| 17:00 |
|
|
Narada joined #virtualJUG |
| 17:00 |
|
|
neven joined #virtualJUG |
| 17:01 |
|
|
blackfin joined #virtualJUG |
| 17:01 |
|
|
mduigou joined #virtualJUG |
| 17:01 |
|
Narada |
looking forward to this |
| 17:01 |
|
|
cwmur joined #virtualJUG |
| 17:01 |
|
|
quux00 joined #virtualJUG |
| 17:01 |
|
|
harishb310 joined #virtualJUG |
| 17:01 |
|
TheShade |
hey mduigou :) |
| 17:01 |
|
pm771 |
Are we there yet? |
| 17:01 |
|
|
mingju joined #virtualJUG |
| 17:01 |
|
Narada |
no |
| 17:01 |
|
HarmeetSingh |
when the session start ? |
| 17:01 |
|
TheShade |
about now |
| 17:01 |
|
Narada |
soon |
| 17:01 |
|
|
pressafc_ joined #virtualJUG |
| 17:01 |
|
namanshah |
Hopefully in a few |
| 17:01 |
|
|
Son_Of_Cole joined #virtualJUG |
| 17:02 |
|
|
t8 joined #virtualJUG |
| 17:02 |
|
Narada |
gc pauses right now |
| 17:02 |
|
|
boulder-co joined #virtualJUG |
| 17:02 |
|
|
Nithin joined #virtualJUG |
| 17:02 |
|
|
amp joined #virtualJUG |
| 17:02 |
|
|
allanc joined #virtualJUG |
| 17:02 |
|
|
carljokl joined #virtualJUG |
| 17:02 |
|
|
rfvizarra joined #virtualJUG |
| 17:02 |
|
mduigou |
TheShade good luck |
| 17:02 |
|
TheShade |
thanks! |
| 17:02 |
|
|
incredibleholg joined #virtualJUG |
| 17:02 |
|
|
traveltainment joined #virtualJUG |
| 17:03 |
|
romeokienzler |
I still see "Starting soon...", is this ok? |
| 17:03 |
|
|
Fedor joined #virtualJUG |
| 17:03 |
|
|
Julien joined #virtualJUG |
| 17:03 |
|
romeokienzler |
Ahh...it seems to start :) |
| 17:03 |
|
|
Deepak joined #virtualJUG |
| 17:03 |
|
pm771 |
Just started |
| 17:03 |
|
|
matteogales joined #virtualJUG |
| 17:03 |
|
romeokienzler |
thanks |
| 17:03 |
|
|
quux00 joined #virtualJUG |
| 17:03 |
|
|
vladimirsitnikov joined #virtualJUG |
| 17:03 |
|
|
Obi joined #virtualJUG |
| 17:03 |
|
|
cvega joined #virtualJUG |
| 17:03 |
|
HarmeetSingh |
hello alesksey |
| 17:03 |
|
OStrekalovsky |
too match robo-voice |
| 17:04 |
|
TheShade |
hi |
| 17:04 |
|
romeokienzler |
I'm on 3G in Switzerland in a train, works very nice |
| 17:05 |
|
|
shalabh joined #virtualJUG |
| 17:05 |
|
|
mohan joined #virtualJUG |
| 17:05 |
|
|
fv joined #virtualJUG |
| 17:05 |
|
Narada |
what about intellij? |
| 17:05 |
|
|
ravipetlur joined #virtualJUG |
| 17:06 |
|
|
Aggelos joined #virtualJUG |
| 17:06 |
|
namanshah |
hi |
| 17:06 |
|
|
vloo joined #virtualJUG |
| 17:06 |
|
|
KrisSoko joined #virtualJUG |
| 17:06 |
|
|
Paks_ joined #virtualJUG |
| 17:06 |
|
TheShade |
take note that there is a 30 sec lag for Youtube live |
| 17:06 |
|
|
Fedor joined #virtualJUG |
| 17:07 |
|
Narada |
we are stuck on java6; cannot go to latest :) |
| 17:07 |
|
Kedar |
Why does Eclipse need restart? Doesn't it use JRebel itself? :) |
| 17:07 |
|
|
gravadlax joined #virtualJUG |
| 17:08 |
|
pm771 |
How save it this optimizer? |
| 17:08 |
|
|
Bala joined #virtualJUG |
| 17:08 |
|
pm771 |
SAFE |
| 17:08 |
|
namanshah |
after all its osgi based, so why do we really need a restart |
| 17:08 |
|
HarmeetSingh |
its great simon |
| 17:08 |
|
sjmaple |
it effectively just changes your eclipse.ini file with suggested values from all over the interwebs |
| 17:08 |
|
Kedar |
yes! |
| 17:08 |
|
Narada |
video is switching to super low res sometimes |
| 17:08 |
|
namanshah |
hm.. |
| 17:09 |
|
sjmaple |
it's always best to back up though :) |
| 17:09 |
|
HarmeetSingh |
;) |
| 17:09 |
|
romeokienzler |
yes |
| 17:09 |
|
sjmaple |
as with anything |
| 17:10 |
|
|
ecabrerar joined #virtualJUG |
| 17:10 |
|
|
Aggelos joined #virtualJUG |
| 17:10 |
|
|
beansf joined #virtualJUG |
| 17:10 |
|
|
Al1en313 joined #virtualJUG |
| 17:10 |
|
incredibleholg |
Is there a chance to get the slides afterwards? |
| 17:10 |
|
|
electroma joined #virtualJUG |
| 17:10 |
|
sjmaple |
http://zeroturnaround.com/free/optimizer-for-eclipse if you want to give it a go - and please give us feedback so we can improve |
| 17:11 |
|
HarmeetSingh |
ok |
| 17:11 |
|
|
Arun joined #virtualJUG |
| 17:11 |
|
sjmaple |
incredibleholg: I'll get them on slideshare at the end |
| 17:11 |
|
|
arzu joined #virtualJUG |
| 17:11 |
|
Arun |
Slides are Oracle copyright? |
| 17:11 |
|
benm |
sjmaple: one quick feedback - doesn't seem to work properly with Spring Tool Suite |
| 17:11 |
|
Al1en313 |
nope |
| 17:11 |
|
Al1en313 |
here is his blog |
| 17:11 |
|
Al1en313 |
http://shipilev.net/blog/2014/jmm-pragmatics/ |
| 17:11 |
|
Narada |
is there a pdf? video is blurring sometimes |
| 17:12 |
|
sjmaple |
Arun: oh, maybe - I'll discuss with him after |
| 17:12 |
|
Arun |
sjmaple: that's what the footer says at least ;) |
| 17:12 |
|
namanshah |
al1en thanks for the link |
| 17:12 |
|
sjmaple |
benm: thanks - so far we've done most of our testing on vanilla eclipse, so will be looking into variants after |
| 17:12 |
|
|
smarks joined #virtualJUG |
| 17:12 |
|
|
PhillipJ joined #virtualJUG |
| 17:12 |
|
|
quux00 left #virtualJUG |
| 17:12 |
|
sjmaple |
Arun: I don't want to copy them I just want a link to them :) |
| 17:13 |
|
benm |
sjmaple - fair enough :-) |
| 17:13 |
|
incredibleholg |
awesome, cheers @sjmaple |
| 17:13 |
|
|
crew4ok joined #virtualJUG |
| 17:13 |
|
sjmaple |
but yeh, STS, JBoss Tool Suite, RAD myEclipse... there are so many :) |
| 17:14 |
|
|
beansf joined #virtualJUG |
| 17:14 |
|
HarmeetSingh |
i think all eclipse based tools support this optimizer ? |
| 17:14 |
|
mduigou |
also relevant even in single threaded is pointer aliasing |
| 17:15 |
|
sjmaple |
questions for Aleksey are as usual asked through IRC - please put them in here :) |
| 17:15 |
|
namanshah |
i guess they will soon |
| 17:15 |
|
sjmaple |
HarmeetSingh: not yet - sometimes they play with the config, which is annoying |
| 17:15 |
|
|
harishb310_ joined #virtualJUG |
| 17:15 |
|
sjmaple |
some might just work though |
| 17:15 |
|
Jerith666 |
Is that C example's result defined in Java? |
| 17:16 |
|
smarks |
@Jerith666 I think so. Java specifies strict left-to-right evaluation order. |
| 17:16 |
|
|
karshan_ joined #virtualJUG |
| 17:16 |
|
romeokienzler |
you can just run a Monte Carlo Jerith666: Simulation in this :) |
| 17:17 |
|
|
Jayan joined #virtualJUG |
| 17:17 |
|
|
sudkak joined #virtualJUG |
| 17:17 |
|
Narada |
lol bring me my slippers |
| 17:18 |
|
|
irpod2 joined #virtualJUG |
| 17:18 |
|
|
MikeK joined #virtualJUG |
| 17:19 |
|
|
void joined #virtualJUG |
| 17:19 |
|
|
adodon joined #virtualJUG |
| 17:19 |
|
smarks |
@Jerith666 See JLS 15.7 for gory details. http://docs.oracle.com/javase/specs/jls/se8/html/jls-15.html#jls-15.7 |
| 17:19 |
|
|
damianl joined #virtualJUG |
| 17:20 |
|
smarks |
There are examples there but not exactly the one that Aleksey showed. |
| 17:20 |
|
Jerith666 |
@smarks thanks! |
| 17:20 |
|
nickolay |
Every time I listen to Shipilev, every time I understand that I'm too stupid to keep up his thoughts during the speech. I still hope to catch up with him sometime:-) |
| 17:20 |
|
|
mselender joined #virtualJUG |
| 17:22 |
|
|
FaisalFeroz joined #virtualJUG |
| 17:25 |
|
Tushar |
0 or -1 |
| 17:25 |
|
|
neverov joined #virtualJUG |
| 17:27 |
|
|
FaisalFeroz joined #virtualJUG |
| 17:28 |
|
joshuaw |
I think I need a primer on the Java Memory Model just to understand him |
| 17:28 |
|
rfvizarra |
What is a value type? |
| 17:28 |
|
Fuud |
struct |
| 17:28 |
|
harishb310_ |
so what could be the implementation for volatile long on say 32 bit machines which cannot really read 64bit at once.. I'm thinking locking is too heavy... |
| 17:28 |
|
rfvizarra |
ah, ok. Thanks! |
| 17:29 |
|
Fuud |
in x86 32 we have some extensions that can operate 64bit at once |
| 17:29 |
|
|
namanshah left #virtualJUG |
| 17:30 |
|
harishb310_ |
in case we don't have? how would the JVM try to achieve it? or it is at java level? |
| 17:31 |
|
Fuud |
MMX is in CPU since Pentium 2 |
| 17:31 |
|
|
joshuaw left #virtualJUG |
| 17:31 |
|
|
sparko joined #virtualJUG |
| 17:32 |
|
|
wkg118 joined #virtualJUG |
| 17:32 |
|
HarmeetSingh |
when the value is initialized to variable and override the value, in this case, in memory model the actual memory is override or just create new value, and on retrieve fetch the latest one. ? |
| 17:33 |
|
harishb310_ |
yes thanks, Fuud.. I was just trying to imagine how you would do it with out hardware support |
| 17:33 |
|
pm771 |
Is it still on? |
| 17:33 |
|
Tushar |
no |
| 17:34 |
|
pm771 |
Why? Planned break? |
| 17:34 |
|
smarks |
I'm still getting audio, and they're on slide 24. |
| 17:34 |
|
smarks |
"Word tearing: Fairy tale" |
| 17:34 |
|
crew4ok |
that's correct, i guess |
| 17:34 |
|
|
abelyaev joined #virtualJUG |
| 17:34 |
|
pm771 |
I do not have audio |
| 17:34 |
|
crew4ok |
Alexey is talking about word tearing currently |
| 17:35 |
|
|
irpod2 left #virtualJUG |
| 17:35 |
|
|
pm771 joined #virtualJUG |
| 17:36 |
|
sjmaple |
better now pm771? |
| 17:36 |
|
pm771 |
Reload took care of it. Got video and audio back. |
| 17:36 |
|
sjmaple |
(y) |
| 17:36 |
|
sjmaple |
oh crap, this isn't skype! haha |
| 17:37 |
|
HarmeetSingh |
this memory model is really painfull |
| 17:37 |
|
smarks |
sjmaple: :-P |
| 17:37 |
|
HarmeetSingh |
:P |
| 17:37 |
|
smarks |
(I get emoticons for those) |
| 17:40 |
|
Narada |
can print true true or false false but nothing else? |
| 17:40 |
|
vladimirsitnikov |
long[] words, not integer |
| 17:40 |
|
|
Swietopel joined #virtualJUG |
| 17:41 |
|
smarks |
"A BitSet is not safe for multithreaded use without external synchronization." - BitSet javadoc |
| 17:41 |
|
shelajev |
It might print false false if thread joining is broken :D |
| 17:41 |
|
shelajev |
http://zeroturnaround.com/rebellabs/concurrency-torture-testing-your-code-within-the-java-memory-model/ |
| 17:42 |
|
neven |
why not (F,F) ? |
| 17:42 |
|
Narada |
why can't it print false false; thread 3 can run first? |
| 17:42 |
|
shelajev |
there's join on threads 1 and 2 |
| 17:42 |
|
benm |
the general assumption was that thread 3 runs following "completion" of 1 & 2 |
| 17:42 |
|
harishb310_ |
Thread.join prohibits it |
| 17:42 |
|
neven |
ah yes ... we wait on T1 and T2 threads |
| 17:42 |
|
neven |
(I missed the join part) |
| 17:43 |
|
shelajev |
the link above is the blogpost that Aleksey mentioned |
| 17:43 |
|
Narada |
ah yes |
| 17:43 |
|
isopov |
BTW, I have constructed an example of tearing on EnumSet (my favorite not frequently used class in standard library) - http://pastebin.com/4UbQbH1r - I get about 5-10 "Boo!" on every run. |
| 17:43 |
|
smarks |
@shelajev It's at least as much a torture test of one's brain as one's code! :-P |
| 17:44 |
|
|
Ashwin joined #virtualJUG |
| 17:54 |
|
Narada |
can anyone see my messages; just want to make sure irc is working |
| 17:55 |
|
neven |
@Narada: yes we see exactly one messasge "can anyone ..." |
| 17:55 |
|
Narada |
thanks |
| 17:58 |
|
shelajev |
do you have any questions? :) it's getting non-trivial here |
| 18:00 |
|
vladimirsitnikov |
what is the po of "try { return x=2; } finally { return x=1; }" ? |
| 18:00 |
|
shelajev |
good question |
| 18:02 |
|
Fuud |
po: x=2 -> x=1 |
| 18:03 |
|
|
sudkak joined #virtualJUG |
| 18:05 |
|
|
besolov joined #virtualJUG |
| 18:06 |
|
Jerith666 |
Is this fair to say: "typically it's easy to come up with one valid excecution. The reason programmers are often surprised by concurrency issues is that there are other, less intuitive executions that are also valid." |
| 18:07 |
|
gvsmirnov |
Not quite true that it's typically to come up with just one valid execution |
| 18:08 |
|
TheShade |
Jerith666, true |
| 18:09 |
|
Jerith666 |
... the easy one being the sequantially consistent one, I guess |
| 18:10 |
|
vladimirsitnikov |
hint: total order |
| 18:16 |
|
|
bbb joined #virtualJUG |
| 18:16 |
|
|
alex-s joined #virtualJUG |
| 18:17 |
|
|
alex-s left #virtualJUG |
| 18:18 |
|
Guest4957 |
if i use more volatiles will there any performance issues? |
| 18:19 |
|
vladimirsitnikov |
sure |
| 18:21 |
|
Kedar |
Isn't this the example that fueled the JMM in java 5? |
| 18:21 |
|
Guest4957 |
i think 1,0 is allowed |
| 18:21 |
|
Kedar |
JMM revisit, I mean |
| 18:23 |
|
smarks |
Kedar: yes, this is all Java 5 stuff so far. |
| 18:24 |
|
smarks |
For background on the JMM update, see JEP 188: http://openjdk.java.net/jeps/188 |
| 18:24 |
|
Kedar |
Thanks smarks |
| 18:25 |
|
sjmaple |
guessing s = stuart here? :) |
| 18:25 |
|
|
neverov` joined #virtualJUG |
| 18:25 |
|
|
neverov` left #virtualJUG |
| 18:25 |
|
smarks |
sjmaple Yep, Hi Simon! |
| 18:25 |
|
|
sanjoyd joined #virtualJUG |
| 18:25 |
|
sjmaple |
hey, welcome back! :) |
| 18:26 |
|
smarks |
Thanks, unfortunately vJUG is often at a time that conflicts with meetings for me, but not today. |
| 18:31 |
|
|
kiwii joined #virtualJUG |
| 18:40 |
|
Kedar |
NO |
| 18:40 |
|
shelajev |
this is probably a great time to ask questions! |
| 18:41 |
|
Narada |
what time will talk end? |
| 18:41 |
|
TheShade |
I think it will take another 40 minutes |
| 18:41 |
|
TheShade |
sorry for overrun |
| 18:42 |
|
Narada |
ah ... ok np |
| 18:42 |
|
Nithin |
is the cost of memory barriers same across all hardware platforms? |
| 18:43 |
|
Fuud |
w/o synchonized on get(), hotspot will eliminate synchronized instruction on set (if only one thread invokes set), isn't it? |
| 18:43 |
|
|
adil joined #virtualJUG |
| 18:43 |
|
TheShade |
it cannot know the only thread is calling set() |
| 18:44 |
|
TheShade |
Nithin, no, it varies wildly |
| 18:45 |
|
Fuud |
Biased locking? |
| 18:45 |
|
pm771 |
Is racing === unpredictable result by definition? |
| 18:46 |
|
smarks |
TheShade: do we tell them about benign data races? |
| 18:46 |
|
smarks |
Well I'll see if I can explain it in one sentence. |
| 18:48 |
|
smarks |
It's possible to write programs that have data races, but which are set up in such a way that regardless of the result of the race, the same result occurs. These are called "benign data races" because there is indeed a data race, but since the outcome is entirely predictable, there is no possibility of it being incorrect. |
| 18:51 |
|
|
slaskawi joined #virtualJUG |
| 18:51 |
|
|
slaskawi joined #virtualJUG |
| 18:55 |
|
|
Jerith666 joined #virtualJUG |
| 18:56 |
|
Kedar |
what does <nothing> mean? |
| 18:57 |
|
crew4ok |
it means the thread never ends in this particular example |
| 18:57 |
|
Kedar |
ah, it never *observes* ready becoming true |
| 18:58 |
|
crew4ok |
yep |
| 18:58 |
|
|
wkg118 joined #virtualJUG |
| 19:13 |
|
vladimirsitnikov |
http://www.slideshare.net/VladimirSitnikv/final-field-semantics |
| 19:14 |
|
Al1en313 |
does it freeze only final values or all values of object? |
| 19:14 |
|
Al1en313 |
sorry, i meant fields |
| 19:14 |
|
vladimirsitnikov |
it is the field that is frozen |
| 19:15 |
|
vladimirsitnikov |
just final fields |
| 19:15 |
|
|
smarks joined #virtualJUG |
| 19:20 |
|
vladimirsitnikov |
Regarding OoTA: "JMM allows reads to see writes that occur _later_ in the execution order (Table 17.4.5-A)". How does that align with "LoadStore option for JMM9"? |
| 19:21 |
|
|
daincredibleholg joined #virtualJUG |
| 19:21 |
|
|
incredibleholg joined #virtualJUG |
| 19:25 |
|
|
ado_ joined #virtualJUG |
| 19:25 |
|
smarks |
He means "recipe" |
| 19:25 |
|
|
Bevin joined #virtualJUG |
| 19:31 |
|
|
divanov joined #virtualJUG |
| 19:36 |
|
|
Al1en313 left #virtualJUG |
| 19:38 |
|
TheShade |
want examples? |
| 19:39 |
|
TheShade |
I mean, jcstress tests? |
| 19:41 |
|
|
mduigou joined #virtualJUG |
| 19:41 |
|
smarks |
Always fun listening to TheShade! |
| 19:41 |
|
mduigou |
Great talk Aleksey! |
| 19:41 |
|
|
MikeK left #virtualJUG |
| 19:42 |
|
|
ado_ left #virtualJUG |
| 19:42 |
|
mduigou |
Yep, as you said, you've only tried to understand it 18 times. A dozen more than most people! |
| 19:42 |
|
smarks |
Slides and commentary that Aleksey mentioned are here: |
| 19:42 |
|
smarks |
http://shipilev.net/blog/2014/jmm-pragmatics/ |
| 19:42 |
|
TheShade |
Phew |
| 19:43 |
|
TheShade |
So, I actually do have a few jsctress samples |
| 19:43 |
|
TheShade |
We can do a private hangout, I think, if anybody wants |
| 19:43 |
|
TheShade |
? |
| 19:43 |
|
smarks |
Lunchtime for me, CUL |
| 19:44 |
|
|
gravadlax joined #virtualJUG |
| 19:57 |
|
|
qwerty joined #virtualJUG |
| 19:57 |
|
|
qwerty left #virtualJUG |
| 19:59 |
|
|
incredibleholg joined #virtualJUG |
| 19:59 |
|
|
daincredibleholg joined #virtualJUG |
| 20:04 |
|
|
MikeT joined #virtualJUG |
| 20:07 |
|
|
smarks joined #virtualJUG |
| 20:09 |
|
|
feyner joined #virtualJUG |
| 20:20 |
|
|
wkg118 joined #virtualJUG |
| 20:26 |
|
|
mselender joined #virtualJUG |
| 20:31 |
|
|
Bevin joined #virtualJUG |
| 20:47 |
|
|
Bala joined #virtualJUG |
| 21:06 |
|
|
smarks joined #virtualJUG |
| 21:17 |
|
|
costlow joined #virtualJUG |
| 21:33 |
|
|
mmatloka joined #virtualJUG |
| 21:58 |
|
|
Narada joined #virtualJUG |
| 23:03 |
|
|
Kedar joined #virtualJUG |
| 23:28 |
|
|
Bevin joined #virtualJUG |
| 23:30 |
|
|
dexjen joined #virtualJUG |
| 23:34 |
|
|
smarks left #virtualJUG |
