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error from sched_setaffinity () call when tid is a kernel thread Any kernel thread that is bound to a specific CPU with kthread_bind() cannot have its affinity changed It should be possible for other kernel threads, though Make sure you zero the map before setting it and passing it to sched_setaffinity
9. 3. libvirt NUMA Tuning | Virtualization Tuning and . . . - Red Hat When modifying the NUMA topology of a guest virtual machine with a configured topology of CPU sockets, cores, and threads, make sure that cores and threads belonging to a single socket are assigned to the same NUMA node
numa(3): NUMA policy library - Linux man page - Linux Documentation Memory policies for shared disk backed file mappings are currently ignored The default memory allocation policy for tasks and all memory range is local allocation This assumes that no ancestor has installed a non-default policy
NUMA errors encountered with ZC and dynamically linked libpfring - narkive numa_sched_setaffinity_v2_int() failed; abort: Invalid argument set_mempolicy: Invalid argument Subsequently, performance is significantly impacted as one would expect Statically linking libpfring eliminates these errors and the observed performance impact
cpuNumaStarter does not reliably work on Hemera defq #3331 Not every time, but rather consistently running LWFA with 1 cfg on Hemera defq results in error numa_sched_setaffinity_v2_int() failed; abort : Invalid argument sched_setaffinity: Invalid argument
NUMA CPU affinity issue - Server Fault 5 is not CPU 5, but the list CPU 0, and CPU 2 as you can see in the list [0,2] from sched_setaffinity(691247, 24, [0, 2]) syscall But it is not setting it Like the kernel has ignored it Could you try with a different distribution or a different kernel? Are you running in a container?
linux - sched_setaffinity fails when called in core_pattern called . . . It appears that EINVAL in the sched_setaffinity call is due to the PF_NO_SETAFFINITY flag being set in the task flags This flag is enabled in most kernel threads to ensure that user-level programs don't manipulate the affinity of the kernel thread in inappropriate ways
numa(3) — Linux manual page - man7. org Memory policies for shared disk backed file mappings are currently ignored The default memory allocation policy for tasks and all memory range is local allocation This assumes that no ancestor has installed a non-default policy
Set affinity of a process using TASKSET or sched_setaffinity() to a . . . 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 requirement, I need to isolate the CPU after the system has booted up