Apps lock up when only one input thread

[Alan Griffiths]

On VT1 (say) run:
$ sudo bin/mir_demo_server_shell --ipc-thread-pool 1

On VT2 run:
$ sudo chmod a+rw /tmp/mir_socket
$ for x in bin/mir_demo_client_*; do ${x} -m /tmp/mir_socket& done

Start using Alt-Tab to switch applications and use Alt+cursor to rearrange apps so you can see multiple.

Expect:

Applications run normally (although perhaps with a reduced frame rate compared to a larger thread pool).

Actual:

Sometimes all the apps lock up. (If you continue tabbing they'll start again).

[Alan Griffiths (alan-griffiths)]

Possibly related to lp:1273224?

[Alan Griffiths (alan-griffiths)]

Server-side delays like this could be a big part of the problem:

[1391017285.282774] (II) frontend::MessageProcessor: mediator=0x7f922400cbf8: next_buffer(), elapsed=34484109µs

[Daniel van Vugt (vanvugt)]

Saturation of the thread pool is bug 1267323, regardless of what you set the number of threads to.