Murali Vilayannur wrote:
Hi Lee,
Does the kernel that you are running support NPTL threads at all?
I recall that using LinuxThreads on Opteron x86_64 is strongly discouraged
..
Alternatively, maybe NPTL is the problem on outdated 2.4 kernels.. does
the RHEL3 update include the futex bug fix reported here
http://www.uwsg.iu.edu/hypermail/linux/kernel/0409.0/2044.html
I am shooting arrows in the dark here :)
Thanks,
Murali
Hi Murali,
Honestly, I don't know how my kernel handles NPTL threads.
I based my decision to compile with --disable-nptl-workaround based on
the message you get from running just a "configure" with no options:
checking for tagged Redhat releases (must patch)... yes
configure: error:
You appear to be configuring PVFS2 on a RedHat distribution that
likely ships with a heavily modified kernel and c library. You must
specify two configure arguments to provide necessary information before
proceeding. First pick one of these two options:
=============================
--enable-redhat24 (if you are using a redhat provided 2.4
kernel)
--disable-redhat24 (if you are using a stock kernel.org kernel)
=============================
Also pick one of the next two options. You should probably enable the
workaround if you are using RedHat EL 3 prior to update 2.
Otherwise it
is probably safer (and higher performance) to disable it:
=============================
--enable-nptl-workaround (to work around buggy glibc pthread library)
--disable-nptl-workaround (if you trust your glibc pthread library)
=============================
Do you think it would be better to instead run with the
--enable-nptl-workaround option instead?
Thanks,
-Lee
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