[TS-3477] Determine thread affinity defaults automatically based on hwloc

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Implemented
• Fix Version/s: 6.0.0
• Component/s: Configuration
• Assignee: Phil Sorber
• Reporter: Sudheer Vinukonda
• Created: 31/Mar/15 15:43
• Updated: 08/Sep/16 16:34
• Resolved: 13/Jun/15 15:27

Description

proxy.config.exec_thread.affinity allows to configure the thread affinity depending on the system configuration.

https://docs.trafficserver.apache.org/en/latest/reference/configuration/records.config.en.html#proxy-config-exec-thread-affinity

It would be nice if ATS can default automatically to the appropriate setting based on the configuration from hwloc to reduce unnecessary complexity for an end user configuring ATS.

zwoop suggests to default to 2 - assign threads to sockets, if there's more than one NUMA node and 0 - assign threads to machine, if not.

zwoop
8:38 if you have more than one NUMA node, probably default to 2, otherwise, default to 0

Issue Links

• is duplicated by: TS-4718 Change the default for proxy.config.exec_thread.affinity to "1"