Hi Igor,
thank you for trying that out.
Those results look strange, I mean difference between sendfile and
regular Grizzly adapter.
Though, it could be caused by enormous number of exception logs, which
you observed.
Most of them (may be all) are fixed on trunk, so if you'll have
chances to retry it again with latest sources - will appreciate that.
Thank you.
WBR,
Alexey.
On May 12, 2009, at 9:18 , Igor Minar wrote:
> Hi Alexey,
>
> On May 11, 2009, at 9:45 AM, Oleksiy Stashok wrote:
>
>> Hi Igor,
>>
>>>
>>> grizzly-sendfile-0.3-SNAPSHOT (the one used for tests) uses
>>> grizzly 1.9.15 not 1.0.x.
>> oh, didn't know that. Shame on me :)
>
> :-P
>
>>
>>> Is there more info/docs on aynchronous write queues?
>> http://blogs.sun.com/oleksiys/entry/grizzly_1_7_0_presents
>> we've changed API a little bit since that, but not much.
>
> That looks like an overkill for grizzly-sendfile since it's dealing
> with static data. However, I can imagine that something like this
> would be useful for dynamically generated responses (webapps). Also
> the results of my benchmarks of this feature in grizzly webserver
> are not significantly different than when it is turned off.. see
> below.
>
>>
>>
>>> btw I tried to run the same tests against glassfish v3b47 and it
>>> kept on getting into a state where after ~9min of testing it would
>>> start sending only partial responses or would refuse sending
>>> static files all together. I didn't have a lot of time to
>>> investigate (it took freaking forever to run all the tests I did),
>>> but I should run my tests against grizzly webserver to see if the
>>> problem repeats there.
>>
>>> There were two or three glassfish tests that passed and with
>>> threadcount of 50 and buffer size 81k (10x the default), I still
>>> saw that gf could achieve only 40-60% of grizzly-sendfile's
>>> throughput.
>> hmm. Ok, if you'll have any further results, please let us know.
>
> I built a simple grizzly webserver:
>
>
> GrizzlyWebServer ws = new GrizzlyWebServer(port, canonicalPath);
> ws.setMaxThreads(threadCount); //set to 50
> ws.getSelectorThread().setBufferSize(bufferSize); //set to 81000
> //optionally: ws.getSelectorThread().setAsyncHttpWriteEnabled(true);
> ws.start();
>
>
> and tested it with the same benchmark as grizzly-sendfile and this
> is what I got:
>
> 200 clients, not throttled:
>
> Type Success Failure
> Count Count
> 1KB Download 446 3
> 200KB Download 493 1
> 500KB Download 479 1
> 1MB Download 468 1
> 20MB Download 502 6
> 100MB Download 496 2
>
> total throughput: 104.200 MB/s (grizzly-sendfile's best: 208.59 MB/s
> && 0 failures)
>
>
> 200 clients, throttled at 1MB/s:
>
> Type Success Failure
> Count Count
> 1KB Download 20 158
> 200KB Download 20 185
> 500KB Download 13 163
> 1MB Download 21 170
> 20MB Download 17 167
> 100MB Download 16 178
>
> total throughput: 3.442 MB/s (grizzly-sendfile's best: 156.59 MB/s
> && 0 failures)
>
> Most if not all of the failures were connection timeout exceptions
> (despite connection.setConnectTimeout(0); and
> connection.setReadTimeout(0); in my benchmark code) or connection
> reset by peer exceptions.
>
> I didn't notice any significant difference between
> AsyncHttpWriteEnabled on or off, which is quite surprising.
>
> The load test also uncovered a bunch of concurrency bugs - the stack
> traces are below.
>
> Am I doing something wrong?
>
> cheers,
> Igor
>
>
>
>
> May 11, 2009 10:37:24 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.nio.channels.CancelledKeyException
> at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
> at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:69)
> at
> sun
> .nio
> .ch.KQueueSelectorImpl.updateSelectedKeys(KQueueSelectorImpl.java:105)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:74)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> at
> com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java:492)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 183)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:37:24 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.nio.channels.CancelledKeyException
> at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
> at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:69)
> at
> sun
> .nio
> .ch.KQueueSelectorImpl.updateSelectedKeys(KQueueSelectorImpl.java:105)
> at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:74)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> at
> com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java:492)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 183)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:47:37 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:47:37 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:51:56 PM com.sun.grizzly.http.ProcessorTask
> invokeAdapter
> SEVERE: HTTP Processing error
> java.nio.channels.ClosedChannelException
> at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:501)
> at
> com
> .sun
> .grizzly
> .http
> .SocketChannelOutputBuffer.sendFile(SocketChannelOutputBuffer.java:
> 357)
> at
> com
> .sun
> .grizzly
> .tcp.StaticResourcesAdapter.service(StaticResourcesAdapter.java:217)
> at
> com
> .sun
> .grizzly
> .tcp.StaticResourcesAdapter.service(StaticResourcesAdapter.java:139)
> at
> com
> .sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:
> 123)
> at
> com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:
> 746)
> at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:
> 655)
> at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:905)
> at
> com
> .sun
> .grizzly
> .http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:161)
> at
> com
> .sun
> .grizzly
> .DefaultProtocolChain
> .executeProtocolFilter(DefaultProtocolChain.java:136)
> at
> com
> .sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:
> 103)
> at
> com
> .sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:
> 89)
> at
> com
> .sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
> at
> com
> .sun
> .grizzly
> .ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
> at
> com
> .sun
> .grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
> at com.sun.grizzly.NIOContext.execute(NIOContext.java:510)
> at
> com
> .sun
> .grizzly
> .SelectorHandlerRunner.handleSelectedKey(SelectorHandlerRunner.java:
> 356)
> at
> com
> .sun
> .grizzly
> .SelectorHandlerRunner.handleSelectedKeys(SelectorHandlerRunner.java:
> 256)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 193)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:54:19 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:54:19 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:56:10 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:56:10 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:56:10 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:56:10 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:57:06 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:57:06 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:59:18 PM com.sun.grizzly.http.SelectorThread$3
> onException
> SEVERE: Exception during controller processing
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> May 11, 2009 10:59:18 PM com.sun.grizzly.SelectorHandlerRunner
> handleSelectException
> SEVERE: doSelect exception
> java.lang.NullPointerException
> at
> com
> .sun
> .grizzly
> .http
> .SelectorThreadKeyHandler
> .doRegisterKey(SelectorThreadKeyHandler.java:86)
> at
> com
> .sun
> .grizzly
> .DefaultSelectionKeyHandler.register(DefaultSelectionKeyHandler.java:
> 133)
> at
> com
> .sun
> .grizzly
> .TCPSelectorHandler.processPendingOperations(TCPSelectorHandler.java:
> 445)
> at
> com.sun.grizzly.TCPSelectorHandler.preSelect(TCPSelectorHandler.java:
> 370)
> at
> com
> .sun
> .grizzly.SelectorHandlerRunner.doSelect(SelectorHandlerRunner.java:
> 181)
> at
> com.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:
> 128)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor
> $Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
>
>
>
>>
>>
>> Thank you.
>>
>> WBR,
>> Alexey.
>>
>>>
>>> On May 11, 2009, at 2:02 AM, Oleksiy Stashok wrote:
>>>
>>>> Hi Igor,
>>>>
>>>> that's great blog and great observations.
>>>> It could be interesting to check one more strategy here:
>>>> asynchronous write queues. Unfortunately we don't have
>>>> implementation of one for Grizzly 1.0.x.
>>>> Unlike ENBA, asynchronous write queue first tries to write buffer
>>>> immediately, and only if it's not able to write whole buffer - it
>>>> registers for async. write (using the same selector, not new one).
>>>>
>>>> IMHO this approach could work better than ENBA, because, we will
>>>> be able to avoid selector/thread switches.
>>>>
>>>> Thank you!
>>>>
>>>> WBR,
>>>> Alexey.
>>>>
>>>> On May 11, 2009, at 4:17 , Igor Minar wrote:
>>>>
>>>>> I was hoping to post this sooner, but came across some *very*
>>>>> surprising results that I had to thoroughly validate - the
>>>>> blocking IO can scale!
>>>>>
>>>>> http://blog.igorminar.com/2009/05/grizzly-sendfile-and-comparison-of.html
>>>>>
>>>>> Let me know what you think, not very many people do multiplexed
>>>>> blocking IO and I think that it is an area that has a lot of
>>>>> potential and deserves more research.
>>>>>
>>>>> cheers,
>>>>> Igor
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>>>
>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
>>> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>>>
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe_at_grizzly.dev.java.net
> For additional commands, e-mail: users-help_at_grizzly.dev.java.net
>