[jboss-jira] [JBoss JIRA] (JGRP-1722) Improve performance of ENCRYPT protocol

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12950170#comment-12950170 ] 

Bela Ban commented on JGRP-1722:
--------------------------------

When a sync RPC is invoked, the following encrypt/decrypt phases are done:
# The request is sent and *encrypted* on the way down
# The request is received and *decrypted* on the way up, either as a single message or as part of a batch
# The response is sent and *encrypted* on the way down
# The response is received and *descrypted* on the way up, either as a single message or as part of a batch

That's a total of 2 encryptions and 2 decryptions for invoking a single sync RPC. I measure the avg cost of encryption and decryption and the total of 1 encrypt/decrypt is ca. 25 us, which means an RPC uses roughly 50us for encryption and decryption. That's a theoretical total of 20'000 max RPCs / sec, but of course this doesn't take the other protocols and processing of the request at the receipient and the response at the caller into account.

*Without* encryption, I get (on the same box) ca. 16'000 RPCs/node avg, *with* encryption I get ca. 8'500. I've come to the conclusion that this is the cost of encryption that has to be paid. If we could make encryption faster, e.g. by picking smaller key sizes, perhaps this could be improved, but parallelization (see above) didn't help.

Note that the numbers for UPerf and higher on cluster01-08 (8 nodes): ca. 20'000 sync RPCs/sec with encryption and 38'000 without.
                
> Improve performance of ENCRYPT protocol
> ---------------------------------------
>
>                 Key: JGRP-1722
>                 URL: https://issues.jboss.org/browse/JGRP-1722
>             Project: JGroups
>          Issue Type: Enhancement
>    Affects Versions: 3.4
>            Reporter: Martin Gencur
>            Assignee: Bela Ban
>             Fix For: 3.5
>
>
> A stress tests with the following setup showed that performance (reads and writes/sec) is halved when ENCRYPT protocol is enabled:
> Infinispan had distributed sync cache with 2 owners on 4 nodes, no transactions. The stress test used 10 threads on each node accessing 1024 byte entries, no conflicts on keys, 20 % writes, 80 % reads. 
> It would be great if we could improve the performance of ENCRYPT protocol.

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