Quick & Dirty Benchmarking

bench.md

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Harddrives

# seq read 
sudo nice --20 dd if=/dev/sdb of=/dev/null bs=1M count=1k iflag=direct
# random read
sudo nice --20 fio --name=global --rw=randread --bs=4k --direct=1 --numjobs=8 --iodepth=4 --ioengine=mmap --filename=/dev/sdb --name=job1 --runtime=10s
# or ioengine=sg but doesn't work on some mmc

Network cards

sudo nice --20 ping 192.168.1.2 -i0.01 -s11000 # ~10Mbps Full Duplex = 20Mbps
sudo nice --20 ping 192.168.1.2 -i0.01 -s55000 # ~50Mbps Full Duplex = 100Mbps
sudo nice --20 ping 192.168.1.2 -i0.001 -s6372 # 100Mbps Full Duplex = 200Mbps
sudo nice --20 ping 192.168.1.2 -i0.001 -s32000 # 512Mbps Full Duplex = 1Gbps
sudo nice --20 ping 192.168.1.2 -i0.001 -s64000 # 1024Mbps Full Duplex = 2Gbps
sudo nice --20 iperf -s # receive
sudo nice --20 iperf -c 192.168.1.2 -i0.5 # send
sudo nice --20 iperf -d 192.168.1.2 -i0.5 # both
# try -z

Ram+CPU

dd if=/dev/zero of=/dev/null bs=1M count=10k