Dan Kegel wrote:
Gareth Hughes wrote:
It is critically important for OpenGL drivers to have fast
(single-instruction) access to thread local variables. ...
While glibc's new thread library implementation has many benefits,
particularly to application programmers (with support for the new keyword
'__thread', and so on), it basically forces a function call per thread
local
variable access for situations like the one I described above. ...
Comments, questions are welcome.
Hi Gareth,
I forwarded your note to the NPTL mailing list.
Roland McGrath replied, and suggests that you might want to
reread the TLS paper
(I think he's referring to
http://people.redhat.com/drepper/nptl-design.pdf,
which appears to be offline at the moment) ...
I've been corrected. The two TLS documents are
http://www.imodulo.com/gnu/gcc/Thread-Local.html and
http://people.redhat.com/drepper/tls.pdf
There have been a few good replies on the NPTL list;
see e.g. https://listman.redhat.com/pipermail/phil-list/2003-February/000615.html
in which Roland expands a bit on his first post.
- Dan
--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
