Hello gentlemen, I seem to have threading problems with 5.1-RELEASE. Every time I run a multithreaded application (linked against libc_r) on a SMP system, I get only 1 CPU loaded at any moment given. I tried different software, including Viewperf, but results remain the same. When linked against Linuxthreads, some applications work excellent, some segfault. Here is some kind of a simple multithreaded program for a 2-way SMP system that writes zeros to a memory array as fast as possible; it runs fine with Linuxthreads or directly under Linux.
# gcc -O2 -fomit-frame-pointer -march=i686 -o smp smp.c -pthread # ./smp 4Gb per pass mode INTEGER | WRITING 8 Kb block: 1351 Mb/s res0: 674 res1: 677 # gcc -O2 -fomit-frame-pointer -march=i686 -o smp2 smp.c -L/usr/local/lib -llthread # ./smp2 4Gb per pass mode INTEGER | WRITING 8 Kb block: 2697 Mb/s res0: 1349 res1: 1348 --- Regards, Rhett ________________________________________________________________________ Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger http://uk.messenger.yahoo.com/
smp.c
Description: smp.c
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