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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 0/7] xen/x86: various XPTI speedups
On Wed, 2018-03-21 at 13:51 +0100, Juergen Gross wrote: > On my machine (Intel i7-4600M) using the PCID feature in the non-XPTI > case showed a slightly worse performance than using global pages > instead (using PCID and global pages is a bad idea as invalidating > global pages in this case would need a complete TLB flush). For this > reason I've decided to use PCID for XPTI only as the default. That > can easily be changed by using the command line parameter "pcid=all". > > XPTI off Jan, XPTI on +this series, XPTI on > real 1m21.169s 1m52.149s (+38%) 1m25.692s (+6%) > user 2m47.652s 2m50.054s (+1%) 2m46.428s (-1%) > sys 1m11.949s 2m21.767s (+97%) 1m23.053s (+15%) > > A git branch of that series (+ Jan's patches) is available: > > https://github.com/jgross1/xen.git xpti > As usual, I've run a few benchmarks. Long story short, this series mitigates the performance hit of XPTI, in pretty much all the cases. In a couple of cases, even significantly so (~10%). The improvement is not as good as in the above numbers, even for similar workloads (compile ones), but I guess that depends on the hardware. But anyway, things do improve, and I think we should have the series in 4.11. I can also confirm that using PCID with XPTI=no, does not bring much of an improvement, if any at all. There's the weird case of STREAM, where using PCID makes things go significantly worse, not only than no-PCID and xpti=no, but also than PCID and xpri=true. Basically, when using PCID, xpti boosts STREAM performance, which is a little weird. I'll try to manually re-run the benchmark in a couple of configurations, and let's see what I will find. Here's the results. Basically: - if you want to compare xpti=on, with and without this series, look at 'Jan, XPTI on' (without) and '+this series, XPTI on' (with); - if you want to compare, with this series, xpti on and off, look at 'XPTI off' (off) and '+this series, XPTI on' (on); - if you want to compare xpti=off, with and without PCID, look at 'XPTI off' (without) and '+this series, XPTI off, PCID all' (with). https://openbenchmarking.org/result/1803232-DARI-180323589 Also available here: AIO-Stress 0.21 Test: Random Write MB/s > Higher Is Better XPTI off .......................... 1783.11 |=================================================================================================================================================== +this series, XPTI on ............. 1967.75 |================================================================================================================================================================== +this series, XPTI off, PCID all .. 1827.43 |====================================================================================================================================================== Jan, XPTI on ...................... 1866.80 |========================================================================================================================================================== Stream 2013-01-17 Type: Copy MB/s > Higher Is Better XPTI off .......................... 19442.54 |================================================================================================================================================================= +this series, XPTI on ............. 18939.40 |============================================================================================================================================================= +this series, XPTI off, PCID all .. 15478.48 |================================================================================================================================ Jan, XPTI on ...................... 15638.96 |================================================================================================================================== Stream 2013-01-17 Type: Scale MB/s > Higher Is Better XPTI off .......................... 12978.74 |================================================================================================================================================================= +this series, XPTI on ............. 12851.56 |=============================================================================================================================================================== +this series, XPTI off, PCID all .. 10699.02 |===================================================================================================================================== Jan, XPTI on ...................... 10778.84 |====================================================================================================================================== Stream 2013-01-17 Type: Triad MB/s > Higher Is Better XPTI off .......................... 14280.68 |================================================================================================================================================================= +this series, XPTI on ............. 14022.30 |============================================================================================================================================================== +this series, XPTI off, PCID all .. 12149.18 |========================================================================================================================================= Jan, XPTI on ...................... 12218.22 |========================================================================================================================================== Stream 2013-01-17 Type: Add MB/s > Higher Is Better XPTI off .......................... 16093.28 |================================================================================================================================================================= +this series, XPTI on ............. 15815.04 |============================================================================================================================================================== +this series, XPTI off, PCID all .. 12077.40 |========================================================================================================================= Jan, XPTI on ...................... 12269.30 |=========================================================================================================================== t-test1 2017-01-13 Threads: 1 Seconds < Lower Is Better XPTI off .......................... 76.16 |=============================================================================================== +this series, XPTI on ............. 113.93 |============================================================================================================================================= +this series, XPTI off, PCID all .. 74.68 |============================================================================================= Jan, XPTI on ...................... 131.26 |=================================================================================================================================================================== t-test1 2017-01-13 Threads: 2 Seconds < Lower Is Better XPTI off .......................... 24.28 |==================================================================================================== +this series, XPTI on ............. 34.91 |================================================================================================================================================ +this series, XPTI off, PCID all .. 23.92 |=================================================================================================== Jan, XPTI on ...................... 39.73 |==================================================================================================================================================================== Timed Linux Kernel Compilation 4.13 Time To Compile Seconds < Lower Is Better XPTI off .......................... 155.35 |============================================================================================================================================== +this series, XPTI on ............. 170.36 |=========================================================================================================================================================== +this series, XPTI off, PCID all .. 155.81 |============================================================================================================================================== Jan, XPTI on ...................... 178.89 |=================================================================================================================================================================== Timed MPlayer Compilation 1.0-rc3 Time To Compile Seconds < Lower Is Better XPTI off .......................... 45.94 |======================================================================================================================================================= +this series, XPTI on ............. 48.85 |================================================================================================================================================================ +this series, XPTI off, PCID all .. 45.95 |======================================================================================================================================================= Jan, XPTI on ...................... 49.97 |==================================================================================================================================================================== Timed PHP Compilation 7.1.9 Time To Compile Seconds < Lower Is Better XPTI off .......................... 119.18 |================================================================================================================================================ +this series, XPTI on ............. 129.24 |============================================================================================================================================================ +this series, XPTI off, PCID all .. 120.29 |================================================================================================================================================= Jan, XPTI on ...................... 134.76 |=================================================================================================================================================================== Parallel BZIP2 Compression 1.1.12 256MB File Compression Seconds < Lower Is Better XPTI off .......................... 8.97 |=========================================================================================================================================================== +this series, XPTI on ............. 8.43 |================================================================================================================================================== +this series, XPTI off, PCID all .. 9.00 |=========================================================================================================================================================== Jan, XPTI on ...................... 9.55 |===================================================================================================================================================================== Hackbench Count: 1 - Type: Process Seconds < Lower Is Better XPTI off .......................... 11.11 |===================================================================================================== +this series, XPTI on ............. 16.62 |======================================================================================================================================================= +this series, XPTI off, PCID all .. 11.05 |==================================================================================================== Jan, XPTI on ...................... 18.11 |==================================================================================================================================================================== Hackbench Count: 4 - Type: Process Seconds < Lower Is Better XPTI off .......................... 37.82 |=============================================================================================== +this series, XPTI on ............. 59.66 |===================================================================================================================================================== +this series, XPTI off, PCID all .. 37.58 |============================================================================================== Jan, XPTI on ...................... 65.47 |==================================================================================================================================================================== Hackbench Count: 16 - Type: Process Seconds < Lower Is Better XPTI off .......................... 142.24 |========================================================================================== +this series, XPTI on ............. 232.55 |=================================================================================================================================================== +this series, XPTI off, PCID all .. 141.58 |========================================================================================== Jan, XPTI on ...................... 257.20 |=================================================================================================================================================================== Redis 4.0.8 Test: LPOP Requests Per Second > Higher Is Better XPTI off .......................... 402887.81 |================================================================================================================================================================ +this series, XPTI on ............. 146349.66 |========================================================== +this series, XPTI off, PCID all .. 341182.95 |======================================================================================================================================= Jan, XPTI on ...................... 128094.76 |=================================================== Redis 4.0.8 Test: SADD Requests Per Second > Higher Is Better XPTI off .......................... 378952.25 |================================================================================================================================================================ +this series, XPTI on ............. 165097.91 |====================================================================== +this series, XPTI off, PCID all .. 371460.27 |============================================================================================================================================================= Jan, XPTI on ...................... 141056.13 |============================================================ Redis 4.0.8 Test: LPUSH Requests Per Second > Higher Is Better XPTI off .......................... 327837.31 |============================================================================================================================================================= +this series, XPTI on ............. 146894.11 |======================================================================= +this series, XPTI off, PCID all .. 333126.30 |================================================================================================================================================================ Jan, XPTI on ...................... 126966.19 |============================================================= Redis 4.0.8 Test: GET Requests Per Second > Higher Is Better XPTI off .......................... 397632.29 |================================================================================================================================================================ +this series, XPTI on ............. 169390.22 |==================================================================== +this series, XPTI off, PCID all .. 393664.83 |============================================================================================================================================================== Jan, XPTI on ...................... 143045.55 |========================================================== Redis 4.0.8 Test: SET Requests Per Second > Higher Is Better XPTI off .......................... 352699.10 |================================================================================================================================================================ +this series, XPTI on ............. 153986.24 |====================================================================== +this series, XPTI off, PCID all .. 350564.06 |=============================================================================================================================================================== Jan, XPTI on ...................... 133726.65 |============================================================= Stress-NG 0.07.26 Test: Crypto Bogo Ops/s > Higher Is Better XPTI off .......................... 689.86 |=================================================================================================================================================================== +this series, XPTI on ............. 688.27 |=================================================================================================================================================================== +this series, XPTI off, PCID all .. 689.49 |=================================================================================================================================================================== Jan, XPTI on ...................... 688.75 |=================================================================================================================================================================== Stress-NG 0.07.26 Test: Bsearch Bogo Ops/s > Higher Is Better XPTI off .......................... 3939.99 |================================================================================================================================================================== +this series, XPTI on ............. 3936.73 |================================================================================================================================================================== +this series, XPTI off, PCID all .. 3936.85 |================================================================================================================================================================== Jan, XPTI on ...................... 3930.97 |================================================================================================================================================================== Stress-NG 0.07.26 Test: Forking Bogo Ops/s > Higher Is Better XPTI off .......................... 6056.42 |================================================================================================================================================================= +this series, XPTI on ............. 5222.55 |=========================================================================================================================================== +this series, XPTI off, PCID all .. 6107.00 |================================================================================================================================================================== Jan, XPTI on ...................... 4515.24 |======================================================================================================================== Stress-NG 0.07.26 Test: Hsearch Bogo Ops/s > Higher Is Better XPTI off .......................... 26376.03 |================================================================================================================================================================= +this series, XPTI on ............. 26278.84 |================================================================================================================================================================ +this series, XPTI off, PCID all .. 26391.88 |================================================================================================================================================================= Jan, XPTI on ...................... 26258.08 |================================================================================================================================================================ Stress-NG 0.07.26 Test: Lsearch Bogo Ops/s > Higher Is Better XPTI off .......................... 60.27 |==================================================================================================================================================================== +this series, XPTI on ............. 60.26 |==================================================================================================================================================================== +this series, XPTI off, PCID all .. 60.27 |==================================================================================================================================================================== Jan, XPTI on ...................... 60.27 |==================================================================================================================================================================== Stress-NG 0.07.26 Test: Tsearch Bogo Ops/s > Higher Is Better XPTI off .......................... 124.15 |================================================================================================================================================================== +this series, XPTI on ............. 124.12 |================================================================================================================================================================== +this series, XPTI off, PCID all .. 125.04 |=================================================================================================================================================================== Jan, XPTI on ...................... 124.75 |=================================================================================================================================================================== Stress-NG 0.07.26 Test: CPU Stress Bogo Ops/s > Higher Is Better XPTI off .......................... 1709.34 |============================================================================================================================================================ +this series, XPTI on ............. 1751.09 |================================================================================================================================================================ +this series, XPTI off, PCID all .. 1746.89 |================================================================================================================================================================ Jan, XPTI on ...................... 1772.44 |================================================================================================================================================================== Stress-NG 0.07.26 Test: Semaphores Bogo Ops/s > Higher Is Better XPTI off .......................... 2208236.65 |============================================================================================================================================================ +this series, XPTI on ............. 2044183.40 |================================================================================================================================================ +this series, XPTI off, PCID all .. 2252052.71 |=============================================================================================================================================================== Jan, XPTI on ...................... 2092475.64 |==================================================================================================================================================== Stress-NG 0.07.26 Test: Matrix Math Bogo Ops/s > Higher Is Better XPTI off .......................... 20279.06 |================================================================================================================================================================= +this series, XPTI on ............. 20261.14 |================================================================================================================================================================= +this series, XPTI off, PCID all .. 20287.40 |================================================================================================================================================================= Jan, XPTI on ...................... 20264.35 |================================================================================================================================================================= Stress-NG 0.07.26 Test: Vector Math Bogo Ops/s > Higher Is Better XPTI off .......................... 10506.60 |================================================================================================================================================================= +this series, XPTI on ............. 10500.10 |================================================================================================================================================================= +this series, XPTI off, PCID all .. 10509.78 |================================================================================================================================================================= Jan, XPTI on ...................... 10493.20 |================================================================================================================================================================= Stress-NG 0.07.26 Test: Memory Copying Bogo Ops/s > Higher Is Better XPTI off .......................... 1051.84 |================================================================================================================================================================== +this series, XPTI on ............. 1012.27 |============================================================================================================================================================ +this series, XPTI off, PCID all .. 983.86 |======================================================================================================================================================== Jan, XPTI on ...................... 992.60 |========================================================================================================================================================= Stress-NG 0.07.26 Test: Socket Activity Bogo Ops/s > Higher Is Better XPTI off .......................... 1587.44 |================================================================================================================================================================= +this series, XPTI on ............. 1087.62 |============================================================================================================== +this series, XPTI off, PCID all .. 1594.80 |================================================================================================================================================================== Jan, XPTI on ...................... 922.89 |============================================================================================== Stress-NG 0.07.26 Test: Context Switching Bogo Ops/s > Higher Is Better XPTI off .......................... 696817.28 |================================================================================================================================================================ +this series, XPTI on ............. 343513.18 |=============================================================================== +this series, XPTI off, PCID all .. 657917.78 |======================================================================================================================================================= Jan, XPTI on ...................... 280122.99 |================================================================ Stress-NG 0.07.26 Test: Glibc C String Functions Bogo Ops/s > Higher Is Better XPTI off .......................... 268516.17 |============================================================================================================================================================= +this series, XPTI on ............. 269261.27 |============================================================================================================================================================= +this series, XPTI off, PCID all .. 273643.72 |================================================================================================================================================================ Jan, XPTI on ...................... 266052.71 |============================================================================================================================================================ Stress-NG 0.07.26 Test: Glibc Qsort Data Sorting Bogo Ops/s > Higher Is Better XPTI off .......................... 57.80 |==================================================================================================================================================================== +this series, XPTI on ............. 56.66 |================================================================================================================================================================= +this series, XPTI off, PCID all .. 57.77 |==================================================================================================================================================================== Jan, XPTI on ...................... 56.88 |================================================================================================================================================================= Stress-NG 0.07.26 Test: System V Message Passing Bogo Ops/s > Higher Is Better XPTI off .......................... 3645928.49 |=============================================================================================================================================================== +this series, XPTI on ............. 1743511.46 |============================================================================ +this series, XPTI off, PCID all .. 3573098.79 |============================================================================================================================================================ Jan, XPTI on ...................... 1596148.22 |====================================================================== PyBench 2018-02-16 Total For Average Test Times Milliseconds < Lower Is Better XPTI off .......................... 3007 |===================================================================================================================================================================== +this series, XPTI on ............. 3000 |===================================================================================================================================================================== +this series, XPTI off, PCID all .. 2995 |==================================================================================================================================================================== Jan, XPTI on ...................... 3000 |===================================================================================================================================================================== NGINX Benchmark 1.9.9 Static Web Page Serving Requests Per Second > Higher Is Better XPTI off .......................... 15930.51 |================================================================================================================================================================= +this series, XPTI on ............. 11537.88 |===================================================================================================================== +this series, XPTI off, PCID all .. 15915.73 |================================================================================================================================================================= Jan, XPTI on ...................... 10454.68 |========================================================================================================== PHPBench 0.8.1 PHP Benchmark Suite Score > Higher Is Better XPTI off .......................... 279331 |================================================================================================================================================================== +this series, XPTI on ............. 253206 |=================================================================================================================================================== +this series, XPTI off, PCID all .. 280877 |=================================================================================================================================================================== Jan, XPTI on ...................... 247288 |================================================================================================================================================ Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Software Engineer @ SUSE https://www.suse.com/ Attachment:
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