[Haskell] ETAPS 2016 final call for papers

2015-09-28 Thread Tarmo Uustalu
** CALL FOR PAPERS: ETAPS 2016 19th European Joint Conferences on Theory And Practice of Software Eindhoven, The Netherlands, 2-8 April 2016 http://www.etaps.org/2016

Re: Removing latency spikes. Garbage collector related?

2015-09-28 Thread Gregory Collins
On Mon, Sep 28, 2015 at 9:08 AM, Will Sewell wrote: > If it is the GC, then is there anything that can be done about it? - Increase value of -A (the default is too small) -- best value for this is L3 cache size of the chip - Increase value of -H (total heap size)

Re: Removing latency spikes. Garbage collector related?

2015-09-28 Thread John Lato
Try Greg's recommendations first. If you still need to do more investigation, I'd recommend that you look at some samples with either threadscope or dumping the eventlog to text. I really like ghc-events-analyze, but it doesn't provide quite the same level of detail. You may also want to dump

Removing latency spikes. Garbage collector related?

2015-09-28 Thread Will Sewell
Hi, I was told in the #haskell IRC channel that this would be a good place to ask this question, so here goes! We’re writing a low-latency messaging system. The problem is we are getting a lot of latency spikes. See this image: http://i.imgur.com/GZ0Ek98.png (yellow to red is the 90th