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https://issues.apache.org/jira/browse/TS-4924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Peach updated TS-4924:
----------------------------
Here is a motivating benchmark. I'm using the configuration above, which uses
{{passthru.so}} as the protocol and {{generator.so}} as the origin server. I'm
using a 1K cached URL, and {{wrk}} to generate load.
This is on a OS X 10.11, so real hardware but not that spiffy.
*Port 8080 (native ATS)*
{noformat}
$ wrk -s wrk.proxy --connections 1 --threads 1 --duration 10
http://127.0.0.1:8080 -- $url
Running 10s test @ http://127.0.0.1:8080
1 threads and 1 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 137.66us 18.70us 1.32ms 91.55%
Req/Sec 7.09k 82.87 7.27k 71.29%
71254 requests in 10.10s, 84.19MB read
Requests/sec: 7055.05
Transfer/sec: 8.34MB
{noformat}
*Port 9090 (passthru protocol plugin)*
{noformat}
$ wrk -s wrk.proxy --connections 1 --threads 1 --duration 10
http://127.0.0.1:9090 -- $url
Running 10s test @ http://127.0.0.1:9090
1 threads and 1 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 495.67us 291.50us 13.83ms 99.84%
Req/Sec 1.79k 177.05 1.84k 96.63%
15970 requests in 10.03s, 18.79MB read
Socket errors: connect 0, read 399, write 0, timeout 0
Requests/sec: 1591.89
Transfer/sec: 1.87MB
{noformat}
So we go from *7K RPS* to *1.5K RPS* simply by introducing a protocol plugin.
It is possible that {{passthru.so}} is a pile of junk, but I would like to be
convinced of that :)
> Protocol plugin performance penalty
> -----------------------------------
>
> Key: TS-4924
> URL: https://issues.apache.org/jira/browse/TS-4924
> Project: Traffic Server
> Issue Type: Bug
> Components: Performance, Plugins
> Reporter: James Peach
> Fix For: sometime
>
>
> It looks like protocol plugins take a significant performance penalty
> compared to doing the same work in the code.
> *Configuratation:*
> {noformat}
> [root@fedora-23 ~]# cat /opt/ats/etc/trafficserver/remap.config
> map http://generator.jpeach.org/ http://127.0.0.1/ \
> @plugin=generator.so
> [root@fedora-23 ~]# cat /opt/ats/etc/trafficserver/plugin.config
> passthru.so
> [root@fedora-23 ~]# tail /opt/ats/etc/trafficserver/records.config
> ...
> CONFIG config.plugin.passthru.server_ports STRING 9090
> {noformat}
> *http_load:*
> {noformat}
> http://generator.jpeach.org/cache/1024/1934f6c8-2cd6-46ea-9077-0532528fb1c9
> [vagrant@fedora-23 ~]$ http_load -proxy 127.0.0.1:8080 -parallel 50 -seconds
> 20 -keep_alive 4 url.lst
> {noformat}
> We are using a generator URL of 1K that gets served from cache.
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