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huibintemaspamfaq [2020/10/05 17:48]
huibintema [Problems running SPAM on new Intel CPUs, possibly after Linux update]
huibintemaspamfaq [2021/02/03 14:26]
huibintema
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 import OSystem, OErr import OSystem, OErr
 </​code>​ </​code>​
-Something will fail here, probably a missing python package or a missing library. Some of the missing libraries can be found [[ftp://​ftp.strw.leidenuniv.nl/pub/​intema/​spam/​lib/​|here]]. Another possible command that may reveal missing libraries is through the following shell command:+Something will fail here, probably a missing python package or a missing library. Some of the missing libraries can be found [[https://​ftp.strw.leidenuniv.nl/​intema/​spam/​lib/​|here]]. Another possible command that may reveal missing libraries is through the following shell command:
 <code bash> <code bash>
 ldd ${SPAM_PATH}/​Obit/​python/​Obit.so ldd ${SPAM_PATH}/​Obit/​python/​Obit.so
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 Q: Why doesn'​t the SPAM pipeline work (anymore), with AIPS generating NaNs in certain tasks? Q: Why doesn'​t the SPAM pipeline work (anymore), with AIPS generating NaNs in certain tasks?
  
-A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[ftp://​ftp.strw.leidenuniv.nl/pub/​intema/​spam/​AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.+A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[https://​ftp.strw.leidenuniv.nl/​intema/​spam/​AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.
  
 Q: Why does the SPAM pipeline generate signal 11 errors in certain AIPS tasks? Q: Why does the SPAM pipeline generate signal 11 errors in certain AIPS tasks?
  
-A: What is causing this is not completely clear, but probably has to do with the newer Intel hardware and Linux installs. A work-around seems to be to use the GNU-compiled version of AIPS 31DEC13 available [[ftp://​ftp.strw.leidenuniv.nl/pub/​intema/​spam/​AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.+A: What is causing this is not completely clear, but probably has to do with the newer Intel hardware and Linux installs. A work-around seems to be to use the GNU-compiled version of AIPS 31DEC13 available [[https://​ftp.strw.leidenuniv.nl/​intema/​spam/​AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.
  
 (Kindly tested by Gerrit Schellenberger and Arnab Chakraborty) (Kindly tested by Gerrit Schellenberger and Arnab Chakraborty)
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 Q: Why doesn'​t the SPAM pipeline work (anymore), with AIPS generating NaNs in certain tasks? Q: Why doesn'​t the SPAM pipeline work (anymore), with AIPS generating NaNs in certain tasks?
  
-A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[ftp://​ftp.strw.leidenuniv.nl/pub/​intema/​spam/​AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.+A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[https://​ftp.strw.leidenuniv.nl/​intema/​spam/​AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.
  
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huibintemaspamfaq.txt ยท Last modified: 2021/02/03 14:26 by huibintema