From: Florian Frank <flori@...>
Date: 2007-09-05T20:24:57+09:00
Subject: Re: Ruby is much slower on linux when compiled with --enable-pthread?

M. Edward (Ed) Borasky wrote:
>> $ strace -c ruby -e '1.upto(100000) {|i| i.to_s}'
>> % time     seconds  usecs/call     calls    errors syscall
>> ------ ----------- ----------- --------- --------- ----------------
>> 100.00    0.000655           0    200006           sigprocmask
> 
>> Yeah - it called sigprocmask over 200,000 times during that 100,000
>> iteration loop.
> 
>> When compiled with --disable-pthread and running the same command,
>> rt_sigprocmask gets called 4 times.

I wonder if calling sigprocmask is the right thing to do with pthreads enabled.
I found this in the man page of pthread_sigmask:

"The use of the sigprocmask() function is unspecified in a multi-threaded
process."

Maybe pthread_sigmask should be used if ruby has pthreads enabled?

-- 
Florian Frank