On Thu, 13 Dec 2018 13:42:24 +0100 Paolo Valente <paolo.valente@xxxxxxxxxx> wrote: > To test the behavior of your system, why don't you check, e.g., how > long it takes to start an application while there is some background > I/O? > > A super quick way to do this is > > git clone https://github.com/Algodev-github/S > cd S/comm_startup_lat > sudo ./comm_startup_lat.sh <scheduler-you-want-to-test> 5 5 seq 3 > "replay-startup-io gnometerm" > > The last command line > - starts the reading of 5 files plus the writing of 5 other files > - replays, for three times, the I/O that gnome terminal does while; > starting up (if you want I can tell you how to change the last > command line so as to execute the original application, but you would > get the same results); > - for each attempt, measures how long this start-up I/O takes to > complete. Just a note: I would feel a lot more comfortable with this utility if it didn't have to run as root. Paranoia. Could you add the functionality that if it is run as a normal user, it tests the I/O scheduling scheme currently enabled. That is, it checks if it is running as root. If it isn't, it just uses whatever I/O scheduler is currently set, ignoring any parameter on the command line. Running as root, it behaves exactly as it does now. The user would be responsible for issuing the echo <scheduler-you-want-to-test> > /sys/block/<device-you-want-to-test>/queue/scheduler as root if they wanted to run as a normal user. _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
