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Merge pull request #29847 from iotcg/mon_doc

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doc: set ceph_perf_msgr_server arguments

Reviewed-by: Greg Farnum <gfarnum@redhat.com>
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Gregory Farnum 2019-09-04 14:43:51 -07:00 committed by GitHub
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doc/dev/messenger.rst
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@ -12,14 +12,15 @@ ceph_perf_msgr is used to do benchmark for messenger module only and can help
to find the bottleneck or time consuming within messenger moduleIt just like
"iperf", we need to start server-side program firstly:
# ./ceph_perf_msgr_server 172.16.30.181:10001 0
# ./ceph_perf_msgr_server 172.16.30.181:10001 1 0
The first argument is ip:port pair which is telling the destination address the
client need to specified. The second argument tells the "think time" when
dispatching messages. After Giant, CEPH_OSD_OP message which is the actual client
read/write io request is fast dispatched without queueing to Dispatcher, in order
to achieve better performance. So CEPH_OSD_OP message will be processed inline,
"think time" is used by mock this "inline process" process.
client need to specified. The second argument configures the server threads. The
third argument tells the "think time"(us) when dispatching messages. After Giant,
CEPH_OSD_OP message which is the actual client read/write io request is fast
dispatched without queueing to Dispatcher, in order to achieve better performance.
So CEPH_OSD_OP message will be processed inline, "think time" is used by mock
this "inline process" process.
# ./ceph_perf_msgr_client 172.16.30.181:10001 1 32 10000 10 4096