cannot find vsock device

[lbcheng888]

cannot find vsock device
scan /sys/class/virtio-ports/ failed: No such file or directory
cannot find ctl channel
fail to setup hyper serial channel

[bergwolf]

vsock device probing is adaptive and its failure does not affect hyperstart starting up. The issue here is missing serial port.

@gogolxdong can you please describe a bit how you got the error? Namingly,

1. Which hypervisor are you using?
2. Are you running with runv directly or using hyperd?
3. Please paste all console logs

[lbcheng888]

Using default qemu hypervisor with hyperd ,whole console logs is the result of running hyperstart.
It seems working now , don't know where is the trick. Another concern is the tty console allocated seems fixed height and width not adjusting to the host console enough.

[bergwolf]

@gogolxdong are you running without kvm support? We used to see a similar issue on travis and it was related to guest clock drifting.

[lbcheng888]

With kvm support. I found another issue which result in hyperctl ERROR: Error from daemon's response: hyperstart closed once specified cpu exceed 8 cores and performance test via wrk -t12 -c400 -d30s http://192.168.123.2 didn't improve linearly as cpu cores increased from 4 to 8 and memory from 8192 to 10240 as expected.

[bergwolf]

@gogolxdong Current max cpu is 8 and it is hard coded in both hyperstart and runv right now.

[lbcheng888]

Is it necessary to set CONFIG_NR_CPUS=8 ,will it be unlimited and how ?
How to explain performance didn't imporve as cpu cores increased from 4 to 8 and memory from 8192 to 10240 as expected ,not linearly but it's even or a little worse.

[bergwolf]

also DefaultMaxCpus in runv. Then you'll need to build your self a kernel and build hyperd.

Performance depends on many things not just cpu and memory. More CPU can mean more lock contentions and cache line bouncing for your test program.