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Justin Ross commented on QPID-7895: ----------------------------------- [~kpvdr], what's the status of this? > [linearstore] Excessive CPU utilization for some kernel clocksources > -------------------------------------------------------------------- > > Key: QPID-7895 > URL: https://issues.apache.org/jira/browse/QPID-7895 > Project: Qpid > Issue Type: Bug > Components: C++ Broker > Reporter: Kim van der Riet > Assignee: Kim van der Riet > Fix For: qpid-cpp-1.37.0 > > > For some kernel clocksources (eg acpi_pm), it has been observed that there is > an excessively high CPU utilization which correlates with the linearstore's > flush timeout being set to a very low value (100us). This is a problem for > some customers which require almost instant flush to obtain > pseudo-synchronous store behavior (hence the 100us flush timer) and run many > brokers (up to hundreds) on a single machine. In these cases, the CPU is > 100% utilized. > A check of the source shows that the flush timer is firing continuously, > irrespective of whether any disk I/O has taken place. > It is proposed that a change to linearstore be made which will only run the > timer when needed (ie while there is content in the write buffers that needs > flushing). -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org