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- detection of alignment fault HPUX 11.00
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тАО03-25-2003 11:16 AM
тАО03-25-2003 11:16 AM
I can see with Glance that I have a lot of Vfault which are i presume alignment faults.
How can I detect at run-time where in the code the error occurs? Is there an option to set at complie time to generate an output or a stack_frame trace?
Thanks
Laurent
Solved! Go to Solution.
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тАО03-25-2003 11:42 AM
тАО03-25-2003 11:42 AM
SolutionScript attached.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО03-25-2003 11:53 AM
тАО03-25-2003 11:53 AM
Re: detection of alignment fault HPUX 11.00
The Vfault as listed in the processor screens for Glance/GPM do not indicate alignment faults. Vfault is the time spent by the processor handling page faults - that's all. I think the alignment your are referring to mainly comes into play during compilation on RISC platforms.
Keith
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тАО03-25-2003 08:46 PM
тАО03-25-2003 08:46 PM
Re: detection of alignment fault HPUX 11.00
It looks like the load on the memory on high.
If there are too many vfaults, it could
probably indicate a high
load on memory.
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тАО03-26-2003 12:14 AM
тАО03-26-2003 12:14 AM
Re: detection of alignment fault HPUX 11.00
My surprise then is that other processes have strictly no vfault at all. The process that have these vfaults is having 4000 vfaults/5sec but the system memory is not full ( I have 2 G of RAM and Glance tell that 1 G is available.
PS: To avoid forced switches i reniced the process to -16.
my whole application use a hundred processes with about 10 threads each