Re: Hardware limits on numbers of threads?

Andi Kleen (ak@muc.de)
19 Sep 2002 11:36:11 +0200


Ulrich Drepper <drepper@redhat.com> writes:

> This was and is true with the kernel before 2.5.3<mumble> when Ingo
> introduced TLS support since the thread specific data had to be
> addressed via LDT entries and the LDT holds at most 8192 entries. The
> GDT based solution now implemented in the kernel has no such
> limitation and the number of threads you can create with the new
> thread library is only limited by system resources.

It also was alwas incorrect for x86-64/64bit progreams, which do not
use a LDT entry for each thread.

-Andi
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