Re: Request official mandate for -D_REENTRANT
Michael Alan Dorman <mdorman@calder.med.miami.edu> writes:
> As the person who packages LinuxThreads, it should be obvious I'm
> pretty much in favor of this, but I would like to know if you have
> any numbers re: your statement that it shouldn't have any
> substantial impact on non-threaded applications?
> More curious than anything else,
Well, when I brought this up earlier David Engel mentioned some tests
that he ran:
> I have some good news. I tried a very simple-minded test case by
> building Tcl 7.6 with glibc 1.99 and using Tcl's test cases as a
> benchmark. Compiling with -D_REENTRANT but not linking with -lpthread
> only resulted in a ~1% slowdown. This amount of slowdown is
> satisfactory to me.
We have run some tests here on our own local software with similar
results.
David also said that if you actually linked against -lpthread, the
slowdown was much more substantial, but that would only apply for
threaded apps, normal, unthreaded apps would be unaffected.
--
Rob
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