It will show a textual representation of GPU and GPU Memory utilization along with details of each process running on both the GPUs of the node. # Load the cuda Environment ~]$ module load cuda/9.2 To check the utilization of GPU nodes, you can run nvidia-smi For more information about htop, see htop homepage It will show a graphical representation of CPU and Memory utilization along with details of each process. # RUN ON THE COMPUTE NODE (STANDARD NODES) To check the utilization of standard nodes, you can run htop It also provides useful information about running processes and their resource usage. This command displays system information, including the utilization of various resources, such as the CPU, memory, and disk. Note that the hostname in the prompt ~]$ ssh ~]$ To check CPU and memory utilization in Linux, you can use the ‘top’ command. JOBID PARTITION NAME USER ST TIME NODES NODELIST(REASON) # Check Slurm job queue to find the allocated node ~]$ squeue -u $USER Now check the compute node name on which your Slurm job is running. # Copy the public key into list of authorized keysĬat ~/.ssh/id_ecdsa.pub > ~/.ssh/authorized_keys # This saves the key pair at the default location and doesn't set passphrase. # Press Enter 3 times for the prompts to accept the default values. You can do this only for the compute nodes on which your Slurm job is currently running.īefore using the SSH command on the login node, you should generate a new SSH key pair on the login node on Kay and add it to your authorized keys on Kay. To check the utilization of compute nodes, you can SSH to it from any login node and then run commands such as htop and nvidia-smi. If we want to see a gradual change in resource usage in a human-readable form, we need to rely on some third-party add-ons to plot graphs.You can check the utilization of the compute nodes to use Kay efficiently and to identify some common mistakes in the Slurm submission scripts. However, they can only display the numbers in the command prompt. Linux offers us some handy commands to obtain a view of system resource usage of specific tasks. Without this parameter, it will only display the digits instead. The –human parameter will display the percentage numbers in a ‘*.*%” style. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND psutil is a module providing an interface for retrieving information on running processes and system utilization (CPU, memory) in a portable way by using Python, implementing many functionalities offered by tools like ps, top and Windows task manager. Here is how we shall use the pidstat command: $ ps aux The psutil library gives you information about CPU, RAM, etc., on a variety of platforms. If we don’t know the process id we are looking for, we need first to use the ps command to find that number. We should install this package first using this command: $ sudo snap install sysstatĪfter installing this package, we can use the included pidstat command to do our bidding. This command is part of the sysstat package, which is not vanilla Linux, but we can still find the documentation of this command on the man page. On the other hand, this makes this command a lightweight process. However, it only gives us a snapshot of current resource usage when we run this command, rather than providing a real-time view as we can expect from the top command. Linux offers another command named pidstat to check the percentage of resources being used. We probably need to use some third-party add-ons to provide a better idea. However, the display is not very user-friendly. The shell will refresh this screen once every a couple of seconds to give us an updated view of a process’ status. Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie Once we find the process id, we can feed the number into the top command in this manner: $ top -p 2225 We can find the process id of a named process using the ps command. When using the -p parameter, we often want to include the process id. If we want to have an idea of a single process, we can use the -p parameter. This command displays a real-time view of a running system in the command prompt. Usually, we can use the Linux built-in top command.
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