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Performance: Difference between revisions
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# performance-wise, I/O also plays a role because as soon as you run 24 or so processes then a single GB ethernet connection may be limiting. OTOH shell-level parallelization smoothes the load. | # performance-wise, I/O also plays a role because as soon as you run 24 or so processes then a single GB ethernet connection may be limiting. OTOH shell-level parallelization smoothes the load. | ||
# REFINE(INTEGRATE)= ! (empty list) makes INTEGRATE go much faster through the frames, since frames are processed less often when analyzing a batch of frames, and no geometry refinement takes place. | # REFINE(INTEGRATE)= ! (empty list) makes INTEGRATE go much faster through the frames, since frames are processed less often when analyzing a batch of frames, and no geometry refinement takes place. | ||
# XDS with the MAXIMUM_NUMBER_OF_JOBS keyword can use several machines. This requires some setup as explained at the bottom of [http://www.mpimf-heidelberg.mpg.de/~kabsch/xds/html_doc/downloading.html]. | # XDS with the MAXIMUM_NUMBER_OF_JOBS keyword can use [[Performance#Cluster|several machines]]. This requires some setup as explained at the bottom of [http://www.mpimf-heidelberg.mpg.de/~kabsch/xds/html_doc/downloading.html]. | ||
# Hyperthreading (SMT), if available on Intel CPUs, is beneficial. A "virtual" core has only about 20% performance of a "physical" core but it comes at no cost - you just have to switch it on in the BIOS of the machine. | # Hyperthreading (SMT), if available on Intel CPUs, is beneficial. A "virtual" core has only about 20% performance of a "physical" core but it comes at no cost - you just have to switch it on in the BIOS of the machine. | ||
# The 64-bit binaries generally are a bit faster than the 32-bit binaries (but that's not specific for XDS). The latter are no longer distributed anyway. | # The 64-bit binaries generally are a bit faster than the 32-bit binaries (but that's not specific for XDS). The latter are no longer distributed anyway. | ||