On Jun 30, 2005, at 1:24 AM, [EMAIL PROTECTED] wrote:
Hmmm. Just out of curiosity... Does this Big Giant Lock (or Two
Big Locks as the case may be for 10.4) just affect GUI type
applications, or does it affect stuff like Apache running as a
daemon? Or does it depend upon how the particular application was
written - ie, are some apps written at a level before the BGL/TBL
takes effect?
I'd read a performance review that said this didn't make such a huge
hit with workstation use (like an individuals desktop) although you
do see it, but it did make a huge hit for server use (get to many
threads open, the 1/10th performance shows up).
It's a long article, but here's one performance summary:
ht tp://www.anandtech.com/mac/showdoc.aspx?i=2436&p=6
I give up trying to post excerpts to the list, the brain-dead content
management keeps rejecting the post and I can't find why.
Maybe this will make it thru:
**
Mac OS X is incredibly slow, between 2 and 5(!) times slower (than
linux), in creating new threads, as it doesn't use kernel threads,
and has to go through extra layers (wrappers). No need to continue
our search: the G5 might not be the fastest integer CPU on earth -
its database performance is completely crippled by an asthmatic
operating system that needs up to 5 times more time to handle and
create threads.
***
It seems a pretty thorough treatment, the whole things starts here:
ht tp://www.anandtech.com/mac/showdoc.aspx?i=2436&p=1
-B
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