22%
07.01.2025
-Wide Roofline Profiling – a Case Study on NERSC’s Perlmutter Supercomputer.”
Figure 1: FLOP types at NERSC (cropped image from PMBS24 presentation by Si Hammond
24%
05.02.2024
alone, three high-profile cases were either debunked, retracted, or seriously doubted.” However, the recent research by Terra Quantum and its partners will continue to generate interest as scientists
22%
03.02.2024
of the system, so it captures all I/O to specific devices.
Typically, iotop
is used to profile the I/O and CPU usage of an application. You start iotop
in a terminal window, send the output to a file
22%
13.04.2023
–
or they can be put in /etc/profile.d
, so when any user logs in, these environment variables are defined. For my testing in this article, I just added the commands to the two user accounts I have on the system
23%
20.03.2023
is important because it includes where things like MPI libraries or profilers are located, as well as where compilers and their associated tools are located. I discuss these concerns as the article progresses
22%
13.12.2022
use the same container for nodes but have them boot with different kernels, but please test the combination before putting it in production.
Combining a container with a kernel is done with a profile
22%
12.09.2022
high-profile HPC initiatives, such as Warewulf and Apptainer (formally Singularity). In parallel with launching Rocky Linux, Kurtzer started a company called CIQ to support Rocky development, consolidate
24%
20.04.2022
user.comment.name -v "Jeff Layton created this file" test.txt
The list of extended attributes for this file can be created:
$ getfattr test.txt
# file: test.txt
user.comment
user.comment.name
Now
22%
18.08.2021
The Darshan userspace tool is often used for I/O profiling of HPC applications. It is broken into two parts: The first part, darshan-runtime
, gathers, compresses, and stores the data. The second
22%
12.05.2021
, with capture tools such as these, latencies are introduced and may alter the original I/O profile being chased, so proceed with caution.
To disable all logging, type:
$ sudo scsi_logging_level -s -E 0 -L 0 -M
