bhyve in -current 4/14/13 can no longer support FreeBSD stable install
bright at mu.org
Fri Mar 15 21:47:35 UTC 2013
On 3/15/13 2:27 PM, Peter Grehan wrote:
> Hi Alfred,
>> What will happen is during the extract process the install will hang. No
>> network IO happens and on the host I see bhyve's CPU hit 100% for each
>> core assigned.
>> For reference this is the bhyve command invoked via Neel's "vmrun.sh".
>> 0 3915 3908 0 103 0 2122208 103428 - R+ 2 1048:45.75 /usr/sbin/bhyve -c
>> 2 -m 2048 -M 0 -AI -H -P -g 0 -s 0:0,hostbridge -s 1:0,virtio-net,tap0
>> -s 2:0,virtio-blk,../freebsd-stable.img -s
>> -S 31,uart,stdio freebsd-stable
>> I tried to gdb the bhyve process but that was bad news. Is there a set
>> of steps usually taken to help pinpoint what is going on when we this
> Does the previous snapshot (r247640) work better ? The relevant
> change there was the recent virtio guest MFC.
> Some things to try:
> - boot bhyve uniprocessor
> - is the bhyve process performing any disk i/o, or is it just
> spinning ?
> the bhyvectl program can dump a lot of vm state - you can try
> something like
> sudo bhyvectl --get-all --cpu=0 --vm=<your vm name>
> sudo bhyvectl --get-all --cpu=1 --vm=<your vm name>
> If you do this repeatedly, it may be possible to see some patterns
> e.g. counters incrementing, %RIP values being the same etc.
Hmm, I keep seem to be getting this:
/usr/home/alfred # bhyvectl --get-all --cpu=0 --vm=freebsd-stable
errno = 16
/usr/home/alfred # bhyvectl --get-all --cpu=1 --vm=freebsd-stable
errno = 16
> Regarding gdb and bhyve, for debugging I usually start bhyve under
> gdb in the foreground and send output to another pty with the gdb "set
> tty" command (note the other pty should have a 'sleep 100000' command
> run to avoid input being captured) - this way, a ctl-C in the gdb
> session will drop into gdb and allow breakpoints to be set etc.
I will try this next. Thank you.
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