huibintemaspamfaq
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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] (current) 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 | ||
| Line 149: | Line 149: | ||
| 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 This is likely caused by an outdated Intel compiler used to build the AIPS binary install.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 This is likely caused by an outdated Intel compiler used to build the AIPS binary install.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) | ||
| Line 205: | Line 205: | ||
| 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
