What is reason causeing linpack failed?

Craig Tierney ctierney at hpti.com
Fri Aug 31 12:39:03 EDT 2001


I have had this happen when I installed bad memory 
into the machine.  Actually, it was either bad memory
or a bad simm slot on the motherboard, but it did cause
the job to fail.  Removing the memory fixed the problem.

There could be other reasons as well.  

Craig


> Hi,
>   I have 1G memory .
>   then i use linpack such as"mpirun -np 1 xhpl".In the HPL.dat ,P=1 and Q=1 
> and N=10000,but it failed!
>   following is the information :
>   T/V      N      NB   P   Q      Time      Gflops
>   w11c2c4  10000  60  1    1      1251.33   5.329e-01
> ||Ax-b||_oo/(eps*||A||_1*N    )=79855925.9134882......Failed
> ||Ax-b||_oo/(eps*||A||_1*||x||_1)=15458564.8357315.....Failed
> ||Ax-b||_oo/(eps*||A||_oo*||x||_oo)=4114482.8342714......Failed
> ||Ax-b||__oo....................= 0.226798
> ||A||_oo.......................=2561.554752
> ||A||_1........................=2558.129237
> ||x||_oo........................=19.382542
> ||x||_1........................ =43356.215115
> ==============================================================
> finished   1 tests withe the following results:
>            0 tests complested and passed residual checks,
>            1 tests completed and failed residual checks,
>            0 tests skipped because of illegal input values.
> --------------------------------------------------------------
> end of tests.
> ==============================================================
> what is the matter?
> where can i find a guide for linpack?
> 
> 
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-- 
Craig Tierney (ctierney at hpti.com)

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