Messages in this thread | | | Date | Fri, 6 May 2005 14:20:40 +0200 | From | Fabio Brugnara <> | Subject | Re: problem with mmap over nfs |
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> Could you please generate a kernel profile? > > - Compile with CONFIG_PROFILING > > - Start the workload, wait for steady state. > > - As root, run: > > #!/bin/sh > > SM=/boot/System.map > TIMEFILE=/tmp/prof.time > readprofile -r > sleep 10 > readprofile -n -v -m $SM | sort -n +2 | tail -40 | tee $TIMEFILE >&2 > > (make sure that /boot/System.map is from the currently-running kernel) > > More in Documentation/basic_profiling.txt > > > > Even better, learn to drive oprofile. Once it's running properly I usually > use this silly script: > > #!/bin/sh > opcontrol --stop > opcontrol --shutdown > rm -rf /var/lib/oprofile > opcontrol --vmlinux=/boot/vmlinux-$(uname -r) > opcontrol --start-daemon > opcontrol --start > sleep 10 > opcontrol --stop > opcontrol --shutdown > opreport -l /boot/vmlinux-$(uname -r) | head -50
Wow! Thank you, Andrew. If we have to consider me alone, this sounds like a dentist that says "please extract your bad teeth and send it for the fix". But I hope I'm able to do it with the help of our system administrators.
best regards, thank you again for your attention, Fabio
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