Tom I just had to change ${TIMECMD} to the literal "time -p" without the quotes.
I couldn't get it to work any other way still using the time command.
You could avoid using the time command, but then you are getting away from the traditional method, which may give different results.

@rohan I managed to get the syncio.sh script to collect data into the syncio.log file and successfully populate the online charts.
Had to tweak the command line in syncio.sh which actually runs the bigrow.
I have also added a cron job to run syncio.sh regularly. I'm using the directory name, which I want to measure, as a parameter to syncio.sh in the cron command.
I'm sure Tom will update the script at some point.

For me on 3t, the syncio script is there and runs, but fails to produce a time.
I notice there is a new thing on the Main dashboard for IO "Sync IO" which I assume is related. No values in the chart yet.

The right-y scales look wrong.
In the image for Num BI we can see right-y values of: ..600 MiB, 800 MiB, 1000 MiB, 1 GiB, 1 GiB, 2 GiB
In the image for Locking activity we can see right-y values of: ....400, 600, 800, 1 K, 1K

I would like to see historical Checkpoint information on the portal.
It would help to verify changes to biclustersize