[MESOS-10208] Support multiple I/O threads in libprocess for libev.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Implemented
• Fix Version/s: 1.12.0
• Component/s: libprocess
• Assignee: Benjamin Mahler
• Reporter: Benjamin Mahler
• Created: 05/Jan/21 20:55
• Updated: 22/Jan/21 20:55
• Resolved: 22/Jan/21 20:55

Description

The current approach to I/O in libprocess, with a single thread performing both the I/O polling and I/O syscalls, cannot keep up with the I/O load on massive scale mesos clusters (which use libev rather than libevent).

Libev supports running multiple loops within a process, so it is possible to support a customizable number of I/O threads in libprocess, at least for libev to start.