The performance deterioration is observed in the new version

[liuqinfei]

Environment:

` [root@client1 cachelib]# uname -r 4.18.0-372.9.1.el8.x86_64

[root@client1 cachelib]# cat /etc/os-release NAME="CentOS Stream" VERSION="8" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="8" PLATFORM_ID="platform:el8" PRETTY_NAME="CentOS Stream 8" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:8" HOME_URL="https://centos.org/" BUG_REPORT_URL="https://bugzilla.redhat.com/" REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 8" REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"

[root@client1 cachelib]# lscpu |grep CPU CPU op-mode(s): 32-bit, 64-bit CPU(s): 96 On-line CPU(s) list: 0-95 CPU family: 6 Model name: Intel(R) Xeon(R) Gold 6248R CPU @ 3.00GHz BIOS Model name: Intel(R) Xeon(R) Gold 6248R CPU @ 3.00GHz CPU MHz: 4000.000 CPU max MHz: 4000.0000 CPU min MHz: 1200.0000 NUMA node0 CPU(s): 0-23,48-71 NUMA node1 CPU(s): 24-47,72-95 `

Performance Result

` Referece version: 953f3c2b891054152fb4ef4c7e6937f88e9051ee Mon Dec 19 15:54:49 2022

[root@client1 cachelib]# ./bin/cachebench --json_test_config test_configs/throughput/same_value_get_throughput_high_contention.json ===JSON Config=== { "cache_config" : { "cacheSizeMB" : 20480, "poolRebalanceIntervalSec" : 0, "htBucketPower" : 30, "htLockPower" : 20, "lruRefreshSec" : 0, "lruUpdateOnRead" : true, "tryLockUpdate" : false }, "test_config" : { "samplingIntervalMs" : 60000,

  "numOps" : 10000000,
  "numThreads" : 48,
  "numKeys" : 10000000,


  "keySizeRange" : [8, 9],
  "keySizeRangeProbability" : [1.0],

  "valSizeRange" : [670, 671],
  "valSizeRangeProbability" : [1.0],

  "getRatio" : 1.00,
  "setRatio" : 0.00,
  "delRatio" : 0.00
}

}

Welcome to OSS version of cachebench Created 9,999,745 keys in 0.03 mins Generating 480.00M sampled accesses Generated access patterns in 0.00 mins Total 480.00M ops to be run 04:26:50 0.00M ops completed. Hit Ratio 0.00% == Test Results == == Allocator Stats == Items in RAM : 0 Items in NVM : 0 Alloc Attempts: 0 Success: 0.00% Evict Attempts: 0 Success: 0.00% RAM Evictions : 0 Fraction of pool 0 used : 0.00 Cache Gets : 480,000,000 Hit Ratio : 0.00% NVM Gets : 0, Coalesced : 100.00% NVM Puts : 0, Success : 0.00%, Clean : 100.00%, AbortsFromDel : 0, AbortsFromGet : 0 NVM Evicts : 0, Clean : 100.00%, Unclean : 0, Double : 0 NVM Deletes : 0 Skipped Deletes: 100.00%

== Throughput for == Total Ops : 480.00 million Total sets: 0 get : 22,163,347/s, success : 0.00% couldExist: 0/s, success : 0.00% set : 0/s, success : 0.00% del : 0/s, found : 0.00% Version: tag: v2023.08.21.00

[root@client1 cachelib]# ./bin/cachebench --json_test_config test_configs/throughput/same_value_get_throughput_high_contention.json ===JSON Config=== { "cache_config" : { "cacheSizeMB" : 20480, "poolRebalanceIntervalSec" : 0, "htBucketPower" : 30, "htLockPower" : 20, "lruRefreshSec" : 0, "lruUpdateOnRead" : true, "tryLockUpdate" : false }, "test_config" : { "samplingIntervalMs" : 60000,

  "numOps" : 10000000,
  "numThreads" : 48,
  "numKeys" : 10000000,


  "keySizeRange" : [8, 9],
  "keySizeRangeProbability" : [1.0],

  "valSizeRange" : [670, 671],
  "valSizeRangeProbability" : [1.0],

  "getRatio" : 1.00,
  "setRatio" : 0.00,
  "delRatio" : 0.00
}

}

Welcome to OSS version of cachebench Created 9,999,773 keys in 0.23 mins Generating 480.00M sampled accesses Generated access patterns in 0.07 mins Total 480.00M ops to be run 04:12:59 0.00M ops completed. Hit Ratio -1.23% (RAM -1.23%, NVM 0.00%) == Test Results == == Allocator Stats == Items in RAM : 0 Items in NVM : 0 Alloc Attempts: 0 Success: 100.00% Evict Attempts: 0 Success: 0.00% RAM Evictions : 0 Fraction of pool 0 used : 0.00 Cache Gets : 480,000,000 Hit Ratio : 0.00% NVM Gets : 0, Coalesced : 0.00% NVM Puts : 0, Success : 100.00%, Clean : 0.00%, AbortsFromDel : 0, AbortsFromGet : 0 NVM Evicts : 0, Clean : 0.00%, Unclean : 0, Double : 0 NVM Deletes : 0 Skipped Deletes: 0.00%

== Throughput for == Total Ops : 480.00 million Total sets: 0 get : 12,747,930/s, success : 0.00% couldExist: 0/s, success : 0.00% set : 0/s, success : 0.00% del : 0/s, found : 0.00%

`