Displaying 2 results from an estimated 2 matches for "makepvmclust".
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makepvmcluster
2008 Nov 24
2
More than doubling performance with snow
...t;rpvm" package on my Lenovo Thinkpad T400
today. The experiment below gave me a surprise. The time consumed by
serial processing was several times larger than that taken by parallel
processing. I'm very curious how this happened. Thank you very much.
> library(snow)
>
> cc <- makePVMcluster(2)
>
> temp <- list(matrix(rnorm(1000000),1000),matrix(rnorm(1000000),1000))
>
> system.time(tt <- clusterApply(cc,temp,"solve"))
user system elapsed
0.584 0.144 4.355
> system.time(ttt <- sapply(temp,"solve"))
user system elapsed
4.777...
2007 Nov 07
1
PVM error message
...is error:
Loading required package: rpvm
Error in dyn.load(x, as.logical(local), as.logical(now)) ;
unable to load shared library
'/usr/local/lib/R/library/rpvm/libs/rpvm.so':
/usr/local/lib/R/library/rpvm/libs/rpvm.so: cannot restore segment
prot after relocL Permission denied
Error in makePVMcluster(spec, ...) : the 'rpvm' package is needed for
PVM clusters.
I need to mention that this is a known working program. This sort of
error happens whether I am logged into root or not, so I don't think it
is a permissions issue.
I am using PVM3.4.5+6-WIN32.tar.gz
Has anyone seen this...