Questions tagged [taskset]
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17 questions
0votes
0answers
14views
CPU affinity not following cpuset
When I run taskset -p <pid> of a process I am getting something like this back: # taskset -p 1078 pid 1078's current affinity mask: 3f And it keeps changing what it reports, sometimes it's 5f, ...
- 284
1vote
1answer
53views
+100
isolcpus kernel option appears to break taskset
I have a laptop with an Intel Core i7-12700H CPU, running Ubuntu 24.04 LTS. This CPU has 6 “performance“ cores, each one running 2 threads, and 8 “efficient” cores. Most of the time, the “efficient” ...
- 1,692
0votes
1answer
39views
How to properly use taskset in a bash file when launching a program? [closed]
My bash script is as follows: #!/bin/bash sudo taskset 1 ./program & When running it does nothing. I am able to run the software normally with ./program. I am attempting to do the behavior of &...
0votes
2answers
2kviews
Restrict all already running processes to a range of CPU cores
I've got an AMD 7950X3D CPU which has 32 total logical cores, 16 of which (0-15) have access to extra cache. To optimize my system for gaming while multitasking I want to run Steam and all the ...
1vote
0answers
94views
why is process running on cpu core that is disabled in affinity mask
when I run taskset -p 242306 I got following output 3ffffffffffc000000000000000000000000000000000000000000038000000 sorry for the long string, there are 256 cores on the box. used taskset -c -p ...
- 111
4votes
1answer
2kviews
Set affinity of a process using TASKSET or sched_setaffinity() to a processor core isolated using CPUSET
First, let me give a background of what I am trying to achieve. I know how to isolate a particular CPU using boot param (isolcpu and nohz_full; the housekeeping subsystem setup). But as per my ...
2votes
0answers
323views
JVM only uses 4 cores
I have a processor-intensive Java program and I want it to use all 8 available cores on the machine. I've run taskset and it reports the mask to be: pid 5897's current affinity mask: ff But in top (...
- 121
2votes
0answers
144views
what happens to processes whose process affinity is set to a disabled processor?
I'm running Centos7 on an hyper-threaded Ivy Bridge machine with 40 cores and 80 threads. The following for loop shows me the processor affinity for all processes with pids <= 80: for pid in $(ps -...
0votes
1answer
206views
What does a taskset -p pid result of "e" mean?
I found the pid of my process. I ran taskset on the pid: $ taskset -p 2059 pid 2059's current affinity mask: e What does this affinity mask value "e" mean? I do not see anything about the possible ...
- 139
0votes
1answer
686views
How do I enforce all commands (including many parrallel commands) in a script to run on a specifc few cores?
I'm trying to write at the beginning of my script some code that will ensure every command inside the script is run on just a few specific cores. even if many commands are run in multiple parallels ...
- 897
0votes
1answer
660views
Using CPU affinity with taskset to speed up Node.js computation, blocked for extended chunks of time
I'm running online servers for a physics-based game with a backend in Node.js. Currently, the server can handle 10 games/worlds at a time before the next tick needs to be executed. With this in mind, ...
- 111
1vote
1answer
109views
What does the CPU consumption in top mean when a CPU is assigned to a single process?
Being on Linux I have "CPUAffinity= 0 1 3" set in system.conf. I also use "taskset -cp 2 $pid" to assign a CPU to a single process. But what does the CPU consumption for the process in top now mean? ...
- 11
2votes
1answer
10kviews
CPU reservation and affinity using taskset and isolcpus kernel parameter with JVM?
We need for the JVM to reserve a set number of CPUs. Following my research we can use taskset along with the kernel parameter isolcpus=<CPU_ID> so that no other process uses this CPU. A few ...
- 201
4votes
1answer
2kviews
How can taskset create pid when the program is not running yet?
I want to limit the processing capability to only a single core in my machine, so I found out taskset can help to set a single core, say core 0, as the following (Courtesy to this answer): taskset -c ...
1vote
1answer
273views
Who and where is settled affinity mask per process?
I have a process, shell. It's affinity mask is 1 (I have 3 CPUs) On redundant machine (almost mirror - it is 7 - ALL CPUs) Who is deciding which mask to set or where it is configured? [root@h1-nms ~]#...
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