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README.md facelift after systemd switch
The details of the implementation have significantly changed after the switch to a systemd-based solution, as have the performance characteristics. We also have a new performance graph, created by the gnuplot.sh script. Signed-off-by: Eric Curtin <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| #!/bin/bash | ||
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| set -e | ||
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| if true; then | ||
| > initramfs.txt | ||
| > initoverlayfs.txt | ||
| > initramfs_systemd_after_switch_root.txt | ||
| > initoverlayfs_systemd_after_switch_root.txt | ||
| fi | ||
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| #size=68 | ||
| #size="$(echo "$i * 8" | bc)" | ||
| for i in {1..11} ; do | ||
| initramfstime=$(grep -m1 -i "systemd 2" initrd-$i.txt | sed "s/\[//g" | sed "s/\]//g" | awk "{print \$1}") | ||
| initoverlayfstime=$(grep -m1 -i "systemd 2" initoverlayfs-$i.txt | sed "s/\[//g" | sed "s/\]//g" | awk "{print \$1}") | ||
| initramfstime_systemd_after_switch_root=$(grep -m2 -i "systemd 2" initrd-$i.txt | tail -n1 | sed "s/\[//g" | sed "s/\]//g" | awk "{print \$1}") | ||
| initoverlayfstime_systemd_after_switch_root=$(grep -m2 -i "systemd 2" initoverlayfs-$i.txt | tail -n1 | sed "s/\[//g" | sed "s/\]//g" | awk "{print \$1}") | ||
| # initramfstime=$(grep -m1 -i "Reached target initrd-switch-root" legacy-plus-data$i.txt | awk "{print \"$size \"\$1}") | ||
| # initoverlayfstime=$(grep -m1 -i "starting kmod" initoverlayfs$i.txt | awk "{print \$1}") | ||
| # initramfstime=$(grep -m1 -i "starting kmod" legacy-plus-data$i.txt | awk "{print \$1}") | ||
| echo "$i $initoverlayfstime" >> initoverlayfs.txt | ||
| echo "$i $initramfstime" >> initramfs.txt | ||
| echo "$i $initoverlayfstime_systemd_after_switch_root" >> initoverlayfs_systemd_after_switch_root.txt | ||
| echo "$i $initramfstime_systemd_after_switch_root" >> initramfs_systemd_after_switch_root.txt | ||
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| # echo "initoverlayfstime: $initoverlayfstime initramfstime: $initramfstime" | ||
| # if (( $(echo "$initramfstime > $initoverlayfstime" | bc -l) )); then | ||
| # echo "initoverlayfs is faster" | ||
| # else | ||
| # echo "initramfs is faster" | ||
| # fi | ||
| done | ||
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| if true; then | ||
| t="png" | ||
| echo "set terminal $t | ||
| set output 'initramfs-vs-initoverlayfs.$t' | ||
| set xlabel 'Iteration' | ||
| set ylabel 'Seconds' | ||
| set key at graph 1, 0.8 | ||
| plot 'initramfs.txt' using 1:(\$2/1) title 'initramfs - systemd start' with lines lw 2, \ | ||
| 'initramfs_systemd_after_switch_root.txt' using 1:(\$2/1) title 'initramfs - systemd start after 1st switch-root' with lines lw 2, \ | ||
| 'initoverlayfs.txt' using 1:(\$2/1) title 'initoverlayfs - systemd start' with lines lw 2, \ | ||
| 'initoverlayfs_systemd_after_switch_root.txt' using 1:(\$2/1) title 'initoverlayfs - systemd start after 1st switch-root' with lines lw 2" \ | ||
| | gnuplot | ||
| fi | ||
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