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Not for the faint of heart, but there is a syscall in perl. To hack a sched_setaffinity call, one might:

#! /usr/bin/perl sub setaffinity { use Config; die if "@Config{qw(ptrsize archname)}" !~ /8.*x86_64.*linux/; my $mask = pack "Q", shift; syscall 203, 0, 8, $mask; } setaffinity 0x22; # allow cores/threads 1 and 5 fork for 1..3; # 8 workers 1 while 1; # busy we are

To easily find out the linux syscall numbers, I recommend looking at strace sources: there are syscallent.h headers for each architecture.

In reply to Re: How can I limit the number of Cores in multi-process programming by oiskuu
in thread How can I limit the number of Cores in multi-process programming by milesjin

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