I wrote:
> Takahiro Itagaki writes:
>> http://www.kernel.org/doc/man-pages/online/pages/man3/random_r.3.html
> It only says that you need those if you want an *independent* random
> sequence for each thread. pgbench never had that before and I doubt
> we need it now. In any case, the same page
Takahiro Itagaki writes:
> While testing the pgbench setshell command patch with -j option,
> I found all threads use the same sequence of random value.
Were they actually threads, or were you testing the code while it had
the broken configure script that didn't set ENABLE_THREAD_SAFETY?
I think
While testing the pgbench setshell command patch with -j option,
I found all threads use the same sequence of random value.
At first, I think we need to call srandom() in each thread,
but the manual says we should use random_r() instead of random()
on multi-threaded programs.
http://www.kernel.org
