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服务器上一共有80个CPU，为什么在配置worker数量为80时测试发并发反而没有配置为8个worker QPS高呢（已启用event扩展）？

配置80个worker时测试结果如下:

root@sbox01:~# wrk -t1000 -c1000 -d30s http://192.168.1.2:80/ --latency
Running 30s test @ http://192.168.1.2:80/
  1000 threads and 1000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     4.54ms    4.63ms 144.98ms   91.58%
    Req/Sec    70.52     31.24   414.00     74.71%
  Latency Distribution
     50%    3.37ms
     75%    5.70ms
     90%    8.37ms
     99%   24.25ms
  1586330 requests in 30.10s, 11.98GB read
  Socket errors: connect 0, read 334175, write 0, timeout 0
Requests/sec:  52700.09
Transfer/sec:    407.55MB

配置8个worker时测试结果如下:

wrk -t1000 -c1000 -d30s http://192.168.1.2:80/ --latency
Running 30s test @ http://192.168.1.2:80/
  1000 threads and 1000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     6.73ms    1.59ms  96.66ms   91.69%
    Req/Sec   144.45     24.98     1.28k    96.07%
  Latency Distribution
     50%    6.73ms
     75%    7.09ms
     90%    7.61ms
     99%    9.34ms
  4352469 requests in 30.11s, 27.93GB read
  Socket errors: connect 0, read 11, write 0, timeout 0
Requests/sec: 144573.17
Transfer/sec:      0.93GB

是CPU核心太多相互竞争内耗严重导致吗？