Date: Tue, 15 Oct 2002 00:03:54 +0200 From: Daniel Rock <D.Rock@t-online.de> To: Alex Zepeda <zipzippy@sonic.net> Cc: current@freebsd.org Subject: Re: Perl 5.8 broken in current Message-ID: <3DAB3F4A.60905@t-online.de> References: <3DAB2B21.5050205@t-online.de> <20021014204407.GA13015@blarf.homeip.net>
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Alex Zepeda schrieb:
>So turn off the optimizations?
>
>gcc's code optimizations are broken, and should be avoided. If you want
>to break perl 5.6 you can do so with -O3 -march=pentiumpro (somehow I
>suspect -O2 would have the same effect).
>
>Besides, that just goes to show, it's not perl that's broken.. rather it's
>the compiler.
>
>
>
But why don't show the same optimization levels on another intel
platform (Solaris x86, gcc-3.2 release) no problem?
And what about the incredible runtime, regardless of optimization level
(t/op/pat.t has a running time of 110s-130s, while the same test on my
Solaris/x86 box only takes 7 seconds to complete.
Solaris (450 MHz P II):
% timex ./perl t/op/pat.t
[...]
ok 921
ok 922
real 7.41
user 5.66
sys 0.29
FreeBSD (300 MHz K6-2, unoptimized):
% /usr/bin/time ./perl t/op/pat.t
[...]
ok 921
ok 922
211,42 real 115,96 user 29,67 sys
FreeBSD (-mcpu=pentiumpro -O):
[...]
ok 639
time: command terminated abnormally
204,05 real 111,23 user 31,60 sys
segmentation fault (core dumped)
Especially the high system time worries me (25% of the runtime in the
kernel)
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