Severe bug in GHC HEAD
marlowsd at gmail.com
Thu Feb 10 10:10:14 CET 2011
On 09/02/11 22:54, Kyra wrote:
> Ghc HEAD has some severe bug. A have not filled an "official" bug report
> since I nave not isolated it properly. Below is how can I describe this
> 1. Symptoms: under a heavy load *and* with RTS option -Nn where n > 1 my
> application stops responding to (http) requests. With -N1 all is ok.
> 2. Hardware: 4-core Intel CPU, OS: Windows 7 x64
> 3. ghc-7.1.20110201- are not affected, ghc-7.1.20110202+ are affected,
> stable ghcs are not affected too. So, the bug was introduced in a HEAD
> branch between Feb 1, 2011 and Feb 2, 2011.
> 4. If I increase "n" in -An RTS option my application proccesses more
> requests before choking. So one could guess the bug is GC-related.
Thanks for letting me know. If you have a GHC build, can you try
unpulling this patch
Wed Feb 2 03:49:07 PST 2011 Simon Marlow <marlowsd at gmail.com>
* scheduleProcessInbox: use non-blocking acquire, and take the whole
and let me know if it helps?
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