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Investigating SemaphoreSlim on net6.0+ #64

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Investigating SemaphoreSlim on net6.0+#64
@NickCraver

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@NickCraver
NickCraver
opened on Jan 13, 2022

Issue for tracking this discussion (so I can also put benchmarks somewhere).

Getting benchmarks running again for a discussion around going back to SemaphoreSlim now that the async issue has been fixed. Current benchmark run shows positive results there:

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.22000
AMD Ryzen 9 5900HX with Radeon Graphics, 1 CPU, 16 logical and 8 physical cores
.NET SDK=6.0.101
  [Host]               : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT
  Job-LZCCVU           : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT
  Job-MZIHQK           : .NET Framework 4.8 (4.8.4420.0), X64 RyuJIT
  .NET 6.0             : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT
  .NET Framework 4.7.2 : .NET Framework 4.8 (4.8.4420.0), X64 RyuJIT
Method Job Runtime Toolchain Mean Error StdDev Min Max Ratio RatioSD Gen 0 Gen 1 Gen 2 Allocated
Monitor_Sync Job-LZCCVU .NET 6.0 net6.0 5.526 ns 0.0613 ns 0.0573 ns 5.434 ns 5.615 ns 0.93 0.02 - - - -
Monitor_Sync Job-MZIHQK .NET Framework 4.7.2 net472 5.928 ns 0.1174 ns 0.1098 ns 5.753 ns 6.115 ns 1.00 0.00 - - - -
Monitor_Sync .NET 6.0 .NET 6.0 Default 5.337 ns 0.0380 ns 0.0317 ns 5.250 ns 5.378 ns 0.90 0.02 - - - -
Monitor_Sync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 6.172 ns 0.0383 ns 0.0358 ns 6.110 ns 6.215 ns 1.04 0.02 - - - -
SemaphoreSlim_Sync Job-LZCCVU .NET 6.0 net6.0 18.246 ns 0.2540 ns 0.2375 ns 17.968 ns 18.590 ns 0.28 0.00 - - - -
SemaphoreSlim_Sync Job-MZIHQK .NET Framework 4.7.2 net472 65.291 ns 0.5218 ns 0.4357 ns 64.263 ns 66.220 ns 1.00 0.00 - - - -
SemaphoreSlim_Sync .NET 6.0 .NET 6.0 Default 18.510 ns 0.3072 ns 0.2874 ns 18.105 ns 19.075 ns 0.28 0.00 - - - -
SemaphoreSlim_Sync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 63.148 ns 0.3578 ns 0.3347 ns 62.689 ns 63.714 ns 0.97 0.01 - - - -
SemaphoreSlim_Async Job-LZCCVU .NET 6.0 net6.0 20.920 ns 0.2461 ns 0.2302 ns 20.527 ns 21.220 ns 0.36 0.00 - - - -
SemaphoreSlim_Async Job-MZIHQK .NET Framework 4.7.2 net472 57.513 ns 0.5600 ns 0.5238 ns 56.611 ns 58.147 ns 1.00 0.00 - - - -
SemaphoreSlim_Async .NET 6.0 .NET 6.0 Default 21.221 ns 0.1525 ns 0.1426 ns 20.910 ns 21.382 ns 0.37 0.00 - - - -
SemaphoreSlim_Async .NET Framework 4.7.2 .NET Framework 4.7.2 Default 55.002 ns 0.0908 ns 0.0805 ns 54.828 ns 55.092 ns 0.96 0.01 - - - -
SemaphoreSlim_Async_HotPath Job-LZCCVU .NET 6.0 net6.0 15.182 ns 0.1708 ns 0.1598 ns 14.925 ns 15.495 ns 0.30 0.01 - - - -
SemaphoreSlim_Async_HotPath Job-MZIHQK .NET Framework 4.7.2 net472 50.912 ns 0.8782 ns 0.8215 ns 49.626 ns 52.584 ns 1.00 0.00 - - - -
SemaphoreSlim_Async_HotPath .NET 6.0 .NET 6.0 Default 14.724 ns 0.1402 ns 0.1311 ns 14.473 ns 14.935 ns 0.29 0.01 - - - -
SemaphoreSlim_Async_HotPath .NET Framework 4.7.2 .NET Framework 4.7.2 Default 47.183 ns 0.1631 ns 0.1525 ns 46.863 ns 47.457 ns 0.93 0.01 - - - -
MutexSlim_Sync Job-LZCCVU .NET 6.0 net6.0 22.292 ns 0.1948 ns 0.1627 ns 22.014 ns 22.564 ns 0.52 0.01 - - - -
MutexSlim_Sync Job-MZIHQK .NET Framework 4.7.2 net472 43.145 ns 0.3944 ns 0.3689 ns 42.555 ns 43.827 ns 1.00 0.00 - - - -
MutexSlim_Sync .NET 6.0 .NET 6.0 Default 22.173 ns 0.1043 ns 0.0975 ns 22.052 ns 22.354 ns 0.51 0.01 - - - -
MutexSlim_Sync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 41.903 ns 0.2398 ns 0.2243 ns 41.381 ns 42.193 ns 0.97 0.01 - - - -
MutexSlim_Async Job-LZCCVU .NET 6.0 net6.0 42.810 ns 0.4583 ns 0.4287 ns 41.971 ns 43.376 ns 0.56 0.01 - - - -
MutexSlim_Async Job-MZIHQK .NET Framework 4.7.2 net472 76.444 ns 0.3811 ns 0.3379 ns 75.667 ns 76.857 ns 1.00 0.00 - - - -
MutexSlim_Async .NET 6.0 .NET 6.0 Default 42.568 ns 0.2998 ns 0.2804 ns 42.157 ns 42.997 ns 0.56 0.00 - - - -
MutexSlim_Async .NET Framework 4.7.2 .NET Framework 4.7.2 Default 72.216 ns 0.2122 ns 0.1985 ns 71.871 ns 72.586 ns 0.94 0.01 - - - -
MutexSlim_Async_HotPath Job-LZCCVU .NET 6.0 net6.0 29.913 ns 0.5884 ns 0.6776 ns 29.128 ns 30.955 ns 0.54 0.01 - - - -
MutexSlim_Async_HotPath Job-MZIHQK .NET Framework 4.7.2 net472 55.409 ns 0.7513 ns 0.6660 ns 54.379 ns 56.648 ns 1.00 0.00 - - - -
MutexSlim_Async_HotPath .NET 6.0 .NET 6.0 Default 29.443 ns 0.1544 ns 0.1444 ns 29.206 ns 29.638 ns 0.53 0.01 - - - -
MutexSlim_Async_HotPath .NET Framework 4.7.2 .NET Framework 4.7.2 Default 53.680 ns 0.3121 ns 0.2919 ns 53.190 ns 54.231 ns 0.97 0.01 - - - -
MutexSlim_ConcurrentLoadAsync Job-LZCCVU .NET 6.0 net6.0 2,120.714 ns 28.5866 ns 26.7399 ns 2,061.812 ns 2,149.688 ns 0.74 0.02 0.0125 - - 125 B
MutexSlim_ConcurrentLoadAsync Job-MZIHQK .NET Framework 4.7.2 net472 2,883.994 ns 46.5535 ns 41.2685 ns 2,762.735 ns 2,927.068 ns 1.00 0.00 0.0438 0.0063 0.0031 284 B
MutexSlim_ConcurrentLoadAsync .NET 6.0 .NET 6.0 Default 2,109.083 ns 17.1215 ns 16.0154 ns 2,072.544 ns 2,126.885 ns 0.73 0.01 0.0125 - - 125 B
MutexSlim_ConcurrentLoadAsync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 2,982.906 ns 11.4533 ns 9.5640 ns 2,967.364 ns 2,995.070 ns 1.04 0.02 0.0406 0.0063 0.0031 279 B
MutexSlim_ConcurrentLoadAsync_DisableContext Job-LZCCVU .NET 6.0 net6.0 2,077.706 ns 16.0061 ns 14.9721 ns 2,041.016 ns 2,094.909 ns 0.74 0.02 0.0063 - - 61 B
MutexSlim_ConcurrentLoadAsync_DisableContext Job-MZIHQK .NET Framework 4.7.2 net472 2,830.493 ns 54.1615 ns 57.9522 ns 2,658.874 ns 2,864.015 ns 1.00 0.00 0.0313 0.0031 - 223 B
MutexSlim_ConcurrentLoadAsync_DisableContext .NET 6.0 .NET 6.0 Default 2,007.664 ns 14.7015 ns 13.7518 ns 1,980.703 ns 2,029.217 ns 0.71 0.02 0.0063 - - 61 B
MutexSlim_ConcurrentLoadAsync_DisableContext .NET Framework 4.7.2 .NET Framework 4.7.2 Default 2,863.572 ns 8.1600 ns 6.8140 ns 2,853.829 ns 2,875.984 ns 1.02 0.03 0.0344 0.0031 - 223 B
SemaphoreSlim_ConcurrentLoadAsync Job-LZCCVU .NET 6.0 net6.0 2,084.316 ns 4.5909 ns 4.0698 ns 2,072.476 ns 2,090.046 ns 0.55 0.01 0.0656 0.0063 - 547 B
SemaphoreSlim_ConcurrentLoadAsync Job-MZIHQK .NET Framework 4.7.2 net472 3,812.444 ns 42.4014 ns 37.5877 ns 3,760.819 ns 3,890.354 ns 1.00 0.00 0.2250 0.0125 - 1,449 B
SemaphoreSlim_ConcurrentLoadAsync .NET 6.0 .NET 6.0 Default 2,124.172 ns 15.9106 ns 14.1043 ns 2,077.397 ns 2,135.378 ns 0.56 0.01 0.0656 0.0063 - 547 B
SemaphoreSlim_ConcurrentLoadAsync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 3,596.999 ns 31.8994 ns 29.8387 ns 3,540.641 ns 3,652.883 ns 0.94 0.01 0.2250 0.0125 - 1,448 B
AsyncSemaphore_ConcurrentLoadAsync Job-LZCCVU .NET 6.0 net6.0 2,027.560 ns 40.4162 ns 51.1136 ns 1,823.880 ns 2,072.102 ns 0.70 0.03 0.0188 - - 163 B
AsyncSemaphore_ConcurrentLoadAsync Job-MZIHQK .NET Framework 4.7.2 net472 2,911.152 ns 57.9191 ns 59.4786 ns 2,767.561 ns 2,985.664 ns 1.00 0.00 0.0500 0.0125 0.0031 328 B
AsyncSemaphore_ConcurrentLoadAsync .NET 6.0 .NET 6.0 Default 2,192.759 ns 42.9130 ns 60.1580 ns 1,910.755 ns 2,232.827 ns 0.75 0.03 0.0188 - - 163 B
AsyncSemaphore_ConcurrentLoadAsync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 3,017.960 ns 13.2881 ns 11.7795 ns 3,001.102 ns 3,039.382 ns 1.04 0.02 0.0500 0.0094 0.0031 328 B
AsyncSemaphore_Sync Job-LZCCVU .NET 6.0 net6.0 15.422 ns 0.2894 ns 0.2565 ns 15.093 ns 15.865 ns 0.75 0.01 - - - -
AsyncSemaphore_Sync Job-MZIHQK .NET Framework 4.7.2 net472 20.470 ns 0.2239 ns 0.2094 ns 20.101 ns 20.818 ns 1.00 0.00 - - - -
AsyncSemaphore_Sync .NET 6.0 .NET 6.0 Default 15.330 ns 0.2029 ns 0.1898 ns 15.131 ns 15.654 ns 0.75 0.01 - - - -
AsyncSemaphore_Sync .NET Framework 4.7.2 .NET Framework 4.7.2 Default 29.478 ns 0.5677 ns 0.6074 ns 27.719 ns 30.165 ns 1.44 0.04 - - - -
AsyncSemaphore_Async Job-LZCCVU .NET 6.0 net6.0 19.468 ns 0.1271 ns 0.1189 ns 19.285 ns 19.687 ns 0.73 0.00 - - - -
AsyncSemaphore_Async Job-MZIHQK .NET Framework 4.7.2 net472 26.625 ns 0.1710 ns 0.1600 ns 26.295 ns 26.857 ns 1.00 0.00 - - - -
AsyncSemaphore_Async .NET 6.0 .NET 6.0 Default 18.151 ns 0.1799 ns 0.1682 ns 17.834 ns 18.381 ns 0.68 0.01 - - - -
AsyncSemaphore_Async .NET Framework 4.7.2 .NET Framework 4.7.2 Default 24.769 ns 0.1090 ns 0.0910 ns 24.530 ns 24.856 ns 0.93 0.01 - - - -
AsyncSemaphore_Async_HotPath Job-LZCCVU .NET 6.0 net6.0 16.201 ns 0.3189 ns 0.5058 ns 15.063 ns 17.121 ns 0.79 0.02 - - - -
AsyncSemaphore_Async_HotPath Job-MZIHQK .NET Framework 4.7.2 net472 20.112 ns 0.1511 ns 0.1340 ns 19.905 ns 20.335 ns 1.00 0.00 - - - -
AsyncSemaphore_Async_HotPath .NET 6.0 .NET 6.0 Default 14.742 ns 0.1243 ns 0.1163 ns 14.502 ns 14.923 ns 0.73 0.01 - - - -
AsyncSemaphore_Async_HotPath .NET Framework 4.7.2 .NET Framework 4.7.2 Default 20.343 ns 0.1257 ns 0.1115 ns 20.154 ns 20.541 ns 1.01 0.01 - - - -

cc @mgravell ^ I can take a poke at what a swap looks like this week just wanted to post numbers up!

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