[Bug 204376] Cavium ThunderX system heavily loaded while at db> prompt

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sun Nov 8 23:38:43 UTC 2015


NGie Cooper <ngie at FreeBSD.org> changed:

           What    |Removed                     |Added
                 CC|                            |cem at freebsd.org,
                   |                            |ngie at FreeBSD.org

--- Comment #1 from NGie Cooper <ngie at FreeBSD.org> ---
It's not just arm64; amd64 does/did a horrible job at yielding when in the
debugger (part of the reason why we have a script which goes and suspends test
VMs at $work if/when they panic).

Conrad had a patch out for amd64 a few months ago which yielded in the debugger
a bit on amd64, but IIRC there were issues at the time. I'll let him comment on
it though.

It would be nice if dropping into the debugger didn't spin all the CPUs at
~100% though.

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