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22.08.2017
provides a path for Python functions to utilize all of the available cores.
In this article, I take a look at what’s possible by writing Python modules in Fortran that use all of the cores on a node
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25.01.2018
system log or a log that you create. The important thing is to pick an approach and stay with it (i.e., don’t mix solutions).
If you want or need more granular data than uptime
provides for CPU
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12.09.2018
(have you tried getting a filesystem into the kernel?) and provide lots of flexibility. SSHFS uses FUSE to create a filesystem that can be shared by transmitting the data via SSH.
The SSHFS FUSE
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09.01.2019
. In this fashion, you’ll make the biggest dent in run time with the fewest directives. A simple profile of the application can provide you with the stack rank of the most time consuming routines.
As you add
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07.02.2019
that performs specific data movements and provides hints about data usage. Table 1 shows the data directive as it is used in C and Fortran.
Table 1: The data
Directive
Fortran
C
!$acc data
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16.07.2019
foreign function library provides C-compatible data types and lets you call functions in dynamic link libraries (DLLs) or shared libraries from within Python. In essence, it “wraps” these libraries so
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03.04.2019
) could “see” all of the others, were coming online. OpenMP provided a very convenient way to write parallel code that could run on all of the processors in the SMP system or a subset of them. As time went
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13.10.2020
to decrease with n
.
Some other attempts have been made to account for non-zero communication time in Amdahl’s Law. One of the best is from Bob Brown at Duke. He provides a good analogy of Amdahl’s Law
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12.05.2021
provides a nice little utility called iostat
that gathers both sets of data. In the example in Listing 6, iostat
is showing an extended set of metrics and the CPU utilization at two-second intervals
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13.06.2022
performance of parallel systems, providing a proxy for computation and data movement in computation fluid dynamics (CFD) applications. NPB has been around for many years and has proven to be very useful
