[ https://issues.apache.org/jira/browse/DISPATCH-1348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Francesco Nigro closed DISPATCH-1348. ------------------------------------- > Save qdr_error_t allocation if not necessary > -------------------------------------------- > > Key: DISPATCH-1348 > URL: https://issues.apache.org/jira/browse/DISPATCH-1348 > Project: Qpid Dispatch > Issue Type: Improvement > Components: Routing Engine > Affects Versions: 1.7.0 > Reporter: Francesco Nigro > Assignee: Ganesh Murthy > Priority: Major > Fix For: 1.8.0 > > > qdr_error_from_pn on error.c is allocating qdr_error_t on the hot path ie > AMQP_disposition_handler: saving those allocations would reduce CPU usage > (and cache misses) on both core and worker threads, making the router able to > scale better while under load. > Initial tests has shown some improvements under load (ie with core CPU thread > ~97% with the new version and ~99% with master): > 12 pairs master (no lock-free queues, no qdr_error_t fix): 285 K msg/sec > 12 pairs master (no lock-free queues, yes qdr_error_t fix): 402 K msg/sec > 12 pairs lock-free q (no qdr_error_t fix): 311 K msg/sec > 12 pairs lock-free q (yes qdr_error_t fix): 510 K msg/sec -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org