[realtime app] not possible to redirect drivers/nvme IRQs from realtime cpuset
Bug #1831566 reported by
Mykyta Iziumtsev
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
Bionic |
New
|
Undecided
|
Unassigned |
Bug Description
We're running realtime application on Ubuntu 16.04 with linux-image 4.15 and found it impossible to get rid of jitter introduced by Intel NVMe IRQs. I'm providing here a patch which solved the issue for us.
The realtime application is bound to isolated CPUs (one thread per CPU, nohz_full= in kernel cmdline, all IRQs moved to housekeeping CPUs), application doesn't use any linux kernel syscalls except in startup phase so we don't expect any interruptions of the application from the kernel or HW.
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
tags: | added: patch |
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apport-collect 1831566
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This change has been made by an automated script, maintained by the Ubuntu Kernel Team.