[GitHub] [trafficserver] ywkaras edited a comment on pull request #7611: Add tries and protection against writer starvation to ink_rwlock.

[GitBox <gi...@apache.org>]

ywkaras edited a comment on pull request #7611:
URL: https://github.com/apache/trafficserver/pull/7611#issuecomment-928037007


   This has been verified in Yahoo Production to not reduce throughput.
   
   Here are the results:
   With this change:
   ```
   [root@e11 wkaras]# ysar -ats -int 1 -header 4 | tail
   09/09-21:10   5821.5   86341     4.3   793.7   143.9    4320.6    2272     3.3   396.8
               | ATS       Client traffic       avg resp         Origin traffic        
   Time           req/s    cons req/con    mbps      ms     req/s    cons req/con    mbps
   09/09-21:11   5791.3   86226     4.3   782.5    98.3    4296.2    2049     3.4   392.2
   09/09-21:12   5685.7   85468     4.2   756.3   105.0    4235.1    2002     3.4   388.4
   09/09-21:13   5679.1   84700     4.3   770.0   101.1    4233.4    2313     3.4   388.9
   ```
   Baseline:
   ```
   [root@e11 wkaras]# ysar -ats -int 1 -header 4 | tail
               | ATS       Client traffic       avg resp         Origin traffic        
   Time           req/s    cons req/con    mbps      ms     req/s    cons req/con    mbps
   09/09-22:09   5368.5   81567     4.2   856.7   101.0    3974.0    1723     3.3   454.3
   09/09-22:10   5433.6   82981     4.0  1264.3   103.5    4027.7    1946     3.3   434.0
   09/09-22:11   5536.3   82812     4.2  1194.8    99.9    4075.7    1827     3.3   397.8
   09/09-22:12   5284.1   81621     4.2   765.9    97.3    3940.3    1678     3.3   385.0
   ```


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