containerd-kata-shimv2 boot speed

0-summary.md

VM templates provides 38.68% speedup for kata containers when running with containerd shimv2.

	boot speed
no-vm-template avg	0.8199s
with-vm-template avg	0.5028s
speedup	38.68%

CMD to run the test:

for I in $(seq 10); do time sudo ctr run -t -d --runtime io.containerd.kata.v2 docker.io/library/busybox:latest foobar$I top;done

no-vm-template

[vmfarm@runtime]$for I in $(seq 10); do time sudo ctr run -t -d --runtime io.containerd.kata.v2 docker.io/library/busybox:latest foobar$I top;done

real    0m0.852s
user    0m0.007s
sys     0m0.057s

real    0m0.813s
user    0m0.034s
sys     0m0.026s

real    0m0.877s
user    0m0.029s
sys     0m0.074s

real    0m0.804s
user    0m0.000s
sys     0m0.061s

real    0m0.767s
user    0m0.022s
sys     0m0.043s

real    0m0.811s
user    0m0.034s
sys     0m0.057s

real    0m0.765s
user    0m0.024s
sys     0m0.031s

real    0m0.795s
user    0m0.015s
sys     0m0.052s

real    0m0.833s
user    0m0.021s
sys     0m0.037s

real    0m0.882s
user    0m0.031s
sys     0m0.053s

with-vm-template

[vmfarm@runtime]$for I in $(seq 10);do time sudo ctr run -t -d -rm --runtime io.containerd.kata.v2 docker.io/library/busybox:latest foobar$I top;done

real    0m0.632s
user    0m0.042s
sys     0m0.044s

real    0m0.461s
user    0m0.016s
sys     0m0.042s

real    0m0.497s
user    0m0.046s
sys     0m0.043s

real    0m0.466s
user    0m0.010s
sys     0m0.046s

real    0m0.516s
user    0m0.017s
sys     0m0.072s

real    0m0.464s
user    0m0.018s
sys     0m0.047s

real    0m0.482s
user    0m0.013s
sys     0m0.046s

real    0m0.461s
user    0m0.018s
sys     0m0.038s

real    0m0.557s
user    0m0.006s
sys     0m0.041s

real    0m0.492s
user    0m0.019s
sys     0m0.027s