Measure serial port performance

Question

Measure serial port performance

Closed this issue 2 years ago · 3 comments

Perform raw read / write performance tests of vmrt's serial port interface, in order to determine a theoretical maximum transfer rate of network endpoints.

Endpoint throughput caps the transfer values within golemfactory/yagna#2103

Answer 1 · 2022-09-07T12:50:46.000Z

Environment description

OS

Ubuntu 22.04.1 LTS

Transferred file

test.bin - 10 GB, 10737418240 B
composed of 0s

Binaries

ya-runtime-vm, built in debug mode
https://github.com/golemfactory/ya-runtime-vm/tree/mf/vm-perf-test @ 6549c5f
ya-runtime-dbg, built in debug mode
https://github.com/golemfactory/ya-runtime-dbg @ 98fab12
socat utility for communicating with vmrt's unix socket (dedicated serial port)

VM image

Base Alpine Linux Docker image

VM spawn command

ya-runtime-dbg -w /tmp/vm-test -r /usr/lib/yagna/plugins/ya-runtime-vm/ya-runtime-vm --task-package /tmp/docker-vm-testing-latest-0d6e10dbb5.gvmi

Answer 2 · 2022-09-07T12:55:31.000Z

Sending data to the VM

Host command

socat unix-connect:/tmp/59c74ab1497548798f7f26acee9e8c1b_test.sock ./test.bin

VM command

time cat /dev/vport0p4 > /dev/null

Results

15 executions, averaging at 20,0916s spent receiving the file.

509.67 MiB/s (534423253.498975 B/s)

Answer 3 · 2022-09-07T13:32:53.000Z

Receiving data from the VM

Host command

socat -u unix-connect:/tmp/59c74ab1497548798f7f26acee9e8c1b_test.sock /dev/null

VM command

time dd if=/dev/urandom bs=1M count=10240 > /dev/vport0p4

Results

10 executions, averaging at 26,5328s spent sending data.

385.94 MiB/s (404684701.200024 B/s)