In this day and age, it seems odd that we have to explicitly specify the
number of cores. Detecting it would be pretty simple, on all systems I know
of.
Before I go ahead and write a patch, I'd there some technical or political
reason we're boy doing that?
On 25 Feb 2013 00:58, "Kazu Yamamoto"
We should really publish a blog post about this.
- If we will take benchmark, "+RTS -Nx -qa -Aym" should be specified to a server. "y" should be changed according to "x", the number of core. I'm using "+RTS -N10 -qa -A32m" on a 12 core machine. "-qa" improves performance on Linux but not FreeBSD even if a "-qa" bug of GHC on FreeBSD is fixed.
http://hackage.haskell.org/trac/ghc/ticket/7708
- "ab" sucks. We should use "weighttp" instead. I use as weighttp -n 1000000 -c 1000 -k -t 10 "http://X.Y.Z.W:8000/" which creates 10 native threads.
For more information, please refer to: http://gwan.com/en_apachebench_httperf.html
http://www.iij.ad.jp/company/development/tech/activities/weighttp/index.html (in Japanese, sorry)
--Kazu
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