I'm attempting to create a std::vector<std::set<int>> with one set for each NUMA-node, containing the thread-ids obtained using omp_get_thread_num(). Topo: Idea: Create data which is ...

How do I assign 2 MPI processes per core? For example, if I do mpirun -np 4 ./application then it should use 2 physical cores to run 4 MPI processes (2 processes per core). I am using Open MPI 1.6...

Is there a programmatic method to set CPU affinity for a process in c/c++ for the Linux operating system?

I'm trying to debug some performance issues with pthreads on Linux and I think sched_getcpu() may be lying to me. It reports a constant CPU for each thread, whereas profiling experiments seem to su...

I've set IRQ affinity in the past on Linux by setting values to the proc files. [1] However, I noticed that when I do this on an system that uses MSI-X for the device (PCIe) that I want to set affi...

I have k8s cluster with 3 nodes I would like that a sample deployment with 3 replicas as the follwing , so each pod got schduled in a different node ? apiVersion: apps/v1 kind: Deployment metada...

I spent this morning trying to find out how to determine which processor id is the hyper-threaded core, but without luck. I wish to find out this information and use set_affinity() to bind a proc...

is there a way to set the "task affinity" programmatically? I mean like with some Intent flag or sth? I didn't find anything about this being possible in the Android docs. Setting the affinity in ...

In Windows, with START /node 1 /affinity ff cmd /C "app.exe" I can set the affinity of app.exe (number of cores used by app.exe). With a windows script, How I can change the affinity of a runn...

I have a pandas dataframe with 100 rows and 10,000 features. I want to fit hierarchical clustering on my data by using pearson correlation as the affinity argument in sklearn.cluster.FeatureAgglome...

I am trying to: Run 16 copies concurrently with processor pinning (2 copies per core) Run 8 copies concurrently with processor pinning (2 copies per core) and flipping processor core to the furth...

I am investigating how run a process on a dedicated CPU in order to avoid context-switches. On my Ubuntu, I isolated two CPUs using the kernel parameters "isolcpus=3,7" and "irqaffinity=0-2,4-6". I...

I want to set the number of RX/TX queues used by an Intel 10G NIC. Let me explain why: I am using an Intel 10G NIC of type X520, on a Dell R720 system. I am using ixgbe version 3.6.7-k. The kernel...

I have a quad core CPU, and lets say I always want to start a Thread on the second core. Is that possible in C#?

So I'm a noob when it comes to this sort of stuff. I'm struggling to compile a climate model on macOS and I've boiled it down to what is going on here: #define _GNU_SOURCE #include <stdio.h&...

I am using the start /AFFINITY [n] [.exe] command to start an executable with the specified affinity. I have a system with 8 processors (1,2,3,4,5,6,7,8). I'd like to set the process to use all of ...

I am trying to restrict the number of CPUs used by Python (for benchmarking & to see if it speeds up my program). I have found a few Python modules for achieving this ('os', 'affinity', 'psuti...

I am trying to check the number of cores my script is using with 'os.sched_getaffinity' method as suggested in Why does multiprocessing use only a single core after I import numpy?. But when I run ...

I have a simple mono-threaded application that does almost pure processing It uses two int buffers of the same size It reads one-by-one all the values of the first buffer each value is a...

Desired behaviour: run a multi-threaded Linux program on a set of cores which have been isolated using isolcpus. Here's a small program we can use as an example multi-threaded program: #include &...

I need to update some old codes to work with the most recent version of OpenMPI, but I'm very confused by the new --map-by system. In particular, I'm not sure how to replace --cpus-per-proc N. Se...

Is there any way to force a process with specific PID, to be executed and run on only one of the cpu s of a server? I know that there is a command like this taskset -cp <Cpu_Number> <Pid&...

And would it be a good idea to do so if I needed the processor cores running on 100% for a dozen seconds or would I get better performance if I let the system decide how to handle the threads? Wha...

I have created a window application in C#.Now I want to set the CPU affinity for this application.I may have 2 processors,4 processors,8 processors or may be more than 8 processors. I want to set ...

I was benchmarking a large scientific application, and found it would sometimes run 10% slower given the same inputs. After much searching, I found the the slowdown only occurred when it was runnin...