并行 haskell (ghc 6.10.4) 不接受 -N 大于 -N1
我正在尝试在 OS X 10.5 上的 GHC 6.10.4（来自 MacPorts）中运行并行代码
，我正在 makefile 中使用 -threaded 进行构建：
GHC=ghc -prof -auto-all -O -threaded
glicko: glicko.hs Lib.hs
$(GHC) --make -main-is Glicko glicko.hs lib.hs
当我调用 ./glicko +RTS -N 时或 ./glicko +RTS -N1 代码运行，但似乎只使用一个 CPU。如果我调用 ./glicko +RTS -N2，那么我会收到记录命令行参数的运行时帮助消息；但文档表明这应该运行该程序。
为什么-N2 不起作用？
以下是更多时间信息：
$ ./glicko +RTS --info
[("GHC RTS", "YES")
,("GHC version", "6.10.4")
,("RTS way", "rts_thr_p")
,("Host platform", "i386-apple-darwin")
,("Host architecture", "i386")
,("Host OS", "darwin")
,("Host vendor", "apple")
,("Build platform", "i386-apple-darwin")
,("Build architecture", "i386")
,("Build OS", "darwin")
,("Build vendor", "apple")
,("Target platform", "i386-apple-darwin")
,("Target architecture", "i386")
,("Target OS", "darwin")
,("Target vendor", "apple")
,("Word size", "32")
,("Compiler unregisterised", "NO")
,("Tables next to code", "YES")
]
I'm trying to run parallel code in GHC 6.10.4 (from MacPorts) on OS X 10.5
I'm building with -threaded, in my makefile:
GHC=ghc -prof -auto-all -O -threaded
glicko: glicko.hs Lib.hs
$(GHC) --make -main-is Glicko glicko.hs lib.hs
When I invoke ./glicko +RTS -N or ./glicko +RTS -N1 the code runs, but seems to only use one CPU. If i invoke as ./glicko +RTS -N2, then I am given the runtime help message that documents commandline parameters; but the documentation suggests that this should run the program.
Why is -N2 not working?
Here's more time info:
$ ./glicko +RTS --info
[("GHC RTS", "YES")
,("GHC version", "6.10.4")
,("RTS way", "rts_thr_p")
,("Host platform", "i386-apple-darwin")
,("Host architecture", "i386")
,("Host OS", "darwin")
,("Host vendor", "apple")
,("Build platform", "i386-apple-darwin")
,("Build architecture", "i386")
,("Build OS", "darwin")
,("Build vendor", "apple")
,("Target platform", "i386-apple-darwin")
,("Target architecture", "i386")
,("Target OS", "darwin")
,("Target vendor", "apple")
,("Word size", "32")
,("Compiler unregisterised", "NO")
,("Tables next to code", "YES")
]
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您已使用分析和线程进行编译。分析器仅在具有 1 个 cpu 的多核模式下工作（运行时中的分析数据结构不是' t 线程安全）。
编译您的程序而不进行分析，您将能够使用超过 -N1 的内容，
请参阅 票号#886
You have compiled with both profiling and threading. The profiler only works in multicore mode with 1 cpu (the profiling data structures in the runtime aren't threadsafe yet).
Compile your program without profiling, and you will be able to use more than -N1.
See ticket #886