The Trusty slaves have hhvm running in the background but we have no use for it:
19287 ? Ssl 0:02 /usr/bin/hhvm --config /etc/hhvm/fcgi.ini --mode server 19297 ? Ss 0:00 \_ /usr/bin/hhvm --config /etc/hhvm/fcgi.ini --mode server 19298 ? Ss 0:00 \_ /usr/bin/hhvm --config /etc/hhvm/fcgi.ini --mode server 19299 ? Ss 0:00 \_ /usr/bin/hhvm --config /etc/hhvm/fcgi.ini --mode server 19300 ? Ss 0:00 \_ /usr/bin/hhvm --config /etc/hhvm/fcgi.ini --mode server 19301 ? Ss 0:00 \_ /usr/bin/hhvm --config /etc/hhvm/fcgi.ini --mode server
The qunit jobs are hitting Apache and Zend PHP.
Rest of hhvm jobs are just invoking hhvm from the command line.