CentOS 7 Mitigation Tests
Comparison with older Xeon


Default: Xeon: 

	Processor: 2 x Intel Xeon Gold 6138 @ 3.70GHz (40 Cores / 80 Threads), Motherboard: TYAN S7106 (V1.00 BIOS), Chipset: Intel Device 2020, Memory: 95232MB, Disk: 256GB Samsung SSD 850 + 2000GB Seagate ST2000DM006-2DM1 + 2 x 120GB TOSHIBA-TR150, Graphics: LLVMpipe, Monitor: VE228, Network: Intel I210 Gigabit Connection

	OS: CentOS Linux 7, Kernel: 3.10.0-693.21.1.el7.x86_64 (x86_64), Desktop: GNOME Shell 3.22.3, Display Server: X Server 1.19.3, Display Driver: modesetting 1.19.3, OpenGL: 2.1 Mesa 17.0.1 Gallium 0.4 (LLVM 3.9 256 bits), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1920x1080

No Mitigation: Xeon: 

	Processor: 2 x Intel Xeon Gold 6138 @ 3.70GHz (40 Cores / 80 Threads), Motherboard: TYAN S7106 (V1.00 BIOS), Chipset: Intel Device 2020, Memory: 95232MB, Disk: 256GB Samsung SSD 850 + 2000GB Seagate ST2000DM006-2DM1 + 2 x 120GB TOSHIBA-TR150, Graphics: LLVMpipe, Monitor: VE228, Network: Intel I210 Gigabit Connection

	OS: CentOS Linux 7, Kernel: 3.10.0-693.21.1.el7.x86_64 (x86_64), Desktop: GNOME Shell 3.22.3, Display Server: X Server 1.19.3, Display Driver: modesetting 1.19.3, OpenGL: 2.1 Mesa 17.0.1 Gallium 0.4 (LLVM 3.9 256 bits), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1920x1080

Default: EPYC: 

	Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR (V0.05.B10 BIOS), Chipset: AMD Device 1450, Memory: 129024MB, Disk: 280GB INTEL SSDPE21D280GA, Graphics: LLVMpipe, Monitor: VE228, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

	OS: CentOS Linux 7, Kernel: 3.10.0-693.21.1.el7.x86_64 (x86_64), Desktop: GNOME Shell 3.22.3, Display Server: X Server 1.19.3, Display Driver: modesetting 1.19.3, OpenGL: 2.1 Mesa 17.0.1 Gallium 0.4 (LLVM 3.9 128 bits), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1920x1080

No Mitigation: EPYC: 

	Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR (V0.05.B10 BIOS), Chipset: AMD Device 1450, Memory: 129024MB, Disk: 280GB INTEL SSDPE21D280GA, Graphics: LLVMpipe, Monitor: VE228, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

	OS: CentOS Linux 7, Kernel: 3.10.0-693.21.1.el7.x86_64 (x86_64), Desktop: GNOME Shell 3.22.3, Display Server: X Server 1.19.3, Display Driver: modesetting 1.19.3, OpenGL: 2.1 Mesa 17.0.1 Gallium 0.4 (LLVM 3.9 128 bits), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1920x1080

Default: C240M4-E52650v4: 

	Processor: 2 x Intel Xeon E5-2650 v4 @ 2.90GHz (24 Cores / 48 Threads), Motherboard: Cisco s UCSC-C220-M4S (C220M4.3.0.3c.0.0831170216 BIOS), Memory: 129024MB, Disk: 299GB UCSC-MRAID12G, Graphics: mgadrmfb

	OS: CentOS Linux 7, Kernel: 3.10.0-693.21.1.el7.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1024x768

No Mitigation: C240M4-E52650v4: 

	Processor: 2 x Intel Xeon E5-2650 v4 @ 2.90GHz (24 Cores / 48 Threads), Motherboard: Cisco s UCSC-C220-M4S (C220M4.3.0.3c.0.0831170216 BIOS), Memory: 129024MB, Disk: 299GB UCSC-MRAID12G, Graphics: mgadrmfb

	OS: CentOS Linux 7, Kernel: 3.10.0-693.21.1.el7.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1024x768


SQLite 3.22
Timed SQLite Insertions
Seconds < Lower Is Better
Default: Xeon .................. 47.17  |========
No Mitigation: Xeon ............ 47.01  |========
Default: EPYC .................. 6.56   |=
No Mitigation: EPYC ............ 6.28   |=
Default: C240M4-E52650v4 ....... 225.54 |======================================
No Mitigation: C240M4-E52650v4 . 183.87 |===============================


Flexible IO Tester 3.1
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
Default: Xeon .................. 534  |========
No Mitigation: Xeon ............ 533  |========
Default: EPYC .................. 2614 |========================================
No Mitigation: EPYC ............ 2606 |========================================
Default: C240M4-E52650v4 ....... 252  |====
No Mitigation: C240M4-E52650v4 . 250  |====


Flexible IO Tester 3.1
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
Default: Xeon .................. 516  |=========
No Mitigation: Xeon ............ 515  |=========
Default: EPYC .................. 2179 |========================================
No Mitigation: EPYC ............ 2179 |========================================
Default: C240M4-E52650v4 ....... 144  |===
No Mitigation: C240M4-E52650v4 . 143  |===


Flexible IO Tester 3.1
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
Default: Xeon .................. 534  |========
No Mitigation: Xeon ............ 533  |========
Default: EPYC .................. 2616 |========================================
No Mitigation: EPYC ............ 2617 |========================================
Default: C240M4-E52650v4 ....... 298  |=====
No Mitigation: C240M4-E52650v4 . 299  |=====


Flexible IO Tester 3.1
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
Default: Xeon .................. 516  |=========
No Mitigation: Xeon ............ 516  |=========
Default: EPYC .................. 2178 |========================================
No Mitigation: EPYC ............ 2178 |========================================
Default: C240M4-E52650v4 ....... 192  |====
No Mitigation: C240M4-E52650v4 . 192  |====


BlogBench 1.0
Test: Read
Final Score > Higher Is Better
Default: Xeon .................. 1347194 |=============================
No Mitigation: Xeon ............ 1419432 |===============================
Default: EPYC .................. 1077180 |=======================
No Mitigation: EPYC ............ 1071852 |=======================
Default: C240M4-E52650v4 ....... 1686908 |=====================================
No Mitigation: C240M4-E52650v4 . 1700440 |=====================================


BlogBench 1.0
Test: Write
Final Score > Higher Is Better
Default: Xeon .................. 10718 |================================
No Mitigation: Xeon ............ 10960 |================================
Default: EPYC .................. 12734 |======================================
No Mitigation: EPYC ............ 13165 |=======================================
Default: C240M4-E52650v4 ....... 2162  |======
No Mitigation: C240M4-E52650v4 . 2100  |======


IOzone 3.465
Record Size: 4Kb - File Size: 8GB - Disk Test: Write Performance
MB/s > Higher Is Better
Default: Xeon .................. 366.83 |================
No Mitigation: Xeon ............ 379.23 |=================
Default: EPYC .................. 815.37 |====================================
No Mitigation: EPYC ............ 851.68 |======================================
Default: C240M4-E52650v4 ....... 115.20 |=====
No Mitigation: C240M4-E52650v4 . 115.94 |=====


Compile Bench 0.6
Test: Compile
MB/s > Higher Is Better
Default: Xeon ....... 1460.15 |==============================================
No Mitigation: Xeon . 1536.84 |================================================
Default: EPYC ....... 1275.37 |========================================
No Mitigation: EPYC . 1376.46 |===========================================


Compile Bench 0.6
Test: Initial Create
MB/s > Higher Is Better
Default: Xeon ....... 222.55 |===========================================
No Mitigation: Xeon . 253.30 |=================================================
Default: EPYC ....... 155.50 |==============================
No Mitigation: EPYC . 162.03 |===============================


Compile Bench 0.6
Test: Read Compiled Tree
MB/s > Higher Is Better
Default: Xeon ....... 1786.12 |=========================================
No Mitigation: Xeon . 2097.64 |================================================
Default: EPYC ....... 1461.13 |=================================
No Mitigation: EPYC . 1539.24 |===================================


Netperf 2.7.0
Server: 192.168.1.55 - Test: TCP Send File - Duration: 60 Seconds
Megabits/sec Throughput > Higher Is Better
Default: Xeon ....... 941.44 |=================================================
No Mitigation: Xeon . 941.38 |=================================================
Default: EPYC ....... 941.15 |=================================================
No Mitigation: EPYC . 941.20 |=================================================


Netperf 2.7.0
Server: 192.168.1.55 - Test: TCP Request Response - Duration: 60 Seconds
Transaction Rate Per Second > Higher Is Better
Default: Xeon ....... 715.57 |============================================
No Mitigation: Xeon . 795.77 |=================================================
Default: EPYC ....... 528.16 |=================================
No Mitigation: EPYC . 397.55 |========================


Netperf 2.7.0
Server: 192.168.1.55 - Test: UDP Request Response - Duration: 60 Seconds
Transaction Rate Per Second > Higher Is Better
Default: Xeon ....... 748.07 |============================================
No Mitigation: Xeon . 835.27 |=================================================
Default: EPYC ....... 325.74 |===================
No Mitigation: EPYC . 365.43 |=====================


Netperf 2.7.0
Server: 192.168.1.55 - Test: TCP Stream - Client To Server - Duration: 60 Seconds
Megabits/sec Throughput > Higher Is Better
Default: Xeon ....... 788.06 |=================================================
No Mitigation: Xeon . 788.10 |=================================================
Default: EPYC ....... 786.77 |=================================================
No Mitigation: EPYC . 788.33 |=================================================


Netperf 2.7.0
Server: 192.168.1.55 - Test: TCP Stream - Server To Client - Duration: 60 Seconds
Megabits/sec Throughput > Higher Is Better
Default: Xeon ....... 941.35 |=================================================
No Mitigation: Xeon . 941.27 |=================================================
Default: EPYC ....... 940.85 |=================================================
No Mitigation: EPYC . 940.67 |=================================================


Netperf 2.7.0
Server: 192.168.1.55 - Test: UDP Stream - Server To Client - 10G - Duration: 60 Seconds
Megabits/sec Throughput > Higher Is Better
Default: Xeon ....... 961.78 |=================================================
No Mitigation: Xeon . 961.71 |=================================================
Default: EPYC ....... 961.65 |=================================================
No Mitigation: EPYC . 961.69 |=================================================


ebizzy 0.3

Records/s > Higher Is Better
Default: Xeon .................. 496979  |================
No Mitigation: Xeon ............ 488760  |================
Default: EPYC .................. 1128609 |=====================================
No Mitigation: EPYC ............ 1124203 |=====================================
Default: C240M4-E52650v4 ....... 494409  |================
No Mitigation: C240M4-E52650v4 . 488199  |================


Timed Linux Kernel Compilation 4.13
Time To Compile
Seconds < Lower Is Better
Default: Xeon .................. 25.82 |==========================
No Mitigation: Xeon ............ 24.94 |=========================
Default: EPYC .................. 31.86 |================================
No Mitigation: EPYC ............ 32.01 |================================
Default: C240M4-E52650v4 ....... 39.20 |=======================================
No Mitigation: C240M4-E52650v4 . 38.54 |======================================


Hackbench
Count: 16 - Type: Thread
Seconds < Lower Is Better
Default: Xeon .................. 29.23 |======================================
No Mitigation: Xeon ............ 25.81 |=================================
Default: EPYC .................. 30.36 |=======================================
No Mitigation: EPYC ............ 29.18 |=====================================
Default: C240M4-E52650v4 ....... 25.21 |================================
No Mitigation: C240M4-E52650v4 . 22.34 |=============================


Hackbench
Count: 16 - Type: Process
Seconds < Lower Is Better
Default: Xeon .................. 25.31 |=======================================
No Mitigation: Xeon ............ 24.07 |=====================================
Default: EPYC .................. 17.74 |===========================
No Mitigation: EPYC ............ 17.22 |===========================
Default: C240M4-E52650v4 ....... 24.47 |======================================
No Mitigation: C240M4-E52650v4 . 21.57 |=================================


Systemd Total Boot Time
Test: Total
ms < Lower Is Better
Default: Xeon .................. 2538816 |=====================================
No Mitigation: Xeon ............ 23018   |
Default: EPYC .................. 106009  |==
No Mitigation: EPYC ............ 83138   |=
Default: C240M4-E52650v4 ....... 41985   |=
No Mitigation: C240M4-E52650v4 . 2564530 |=====================================


Systemd Total Boot Time
Test: Kernel
ms < Lower Is Better
Default: Xeon .................. 2948 |========================================
No Mitigation: Xeon ............ 2791 |======================================
Default: EPYC .................. 1826 |=========================
No Mitigation: EPYC ............ 1812 |=========================
Default: C240M4-E52650v4 ....... 2444 |=================================
No Mitigation: C240M4-E52650v4 . 2440 |=================================


Systemd Total Boot Time
Test: Loader
ms < Lower Is Better
Default: Xeon .................. 2310  |=======
Default: EPYC .................. 5492  |================
No Mitigation: EPYC ............ 13432 |=======================================
No Mitigation: C240M4-E52650v4 . 6794  |====================


Systemd Total Boot Time
Test: Firmware
ms < Lower Is Better
Default: Xeon .................. 2487421 |====================================
Default: EPYC .................. 44496   |=
No Mitigation: EPYC ............ 46473   |=
No Mitigation: C240M4-E52650v4 . 2540456 |=====================================


Systemd Total Boot Time
Test: Userspace
ms < Lower Is Better
Default: Xeon .................. 44463 |=================================
No Mitigation: Xeon ............ 18428 |==============
Default: EPYC .................. 52882 |=======================================
No Mitigation: EPYC ............ 20117 |===============
Default: C240M4-E52650v4 ....... 36813 |===========================
No Mitigation: C240M4-E52650v4 . 12459 |=========


PostgreSQL pgbench 10.3
Scaling: Buffer Test - Test: Normal Load - Mode: Read Only
TPS > Higher Is Better
Default: Xeon ....... 589604.88 |=============================================
No Mitigation: Xeon . 606672.77 |==============================================
Default: EPYC ....... 350860.98 |===========================
No Mitigation: EPYC . 352912.32 |===========================


PostgreSQL pgbench 10.3
Scaling: Buffer Test - Test: Normal Load - Mode: Read Write
TPS > Higher Is Better
Default: Xeon ....... 8904.44  |======================
No Mitigation: Xeon . 8863.35  |======================
Default: EPYC ....... 19123.50 |===============================================
No Mitigation: EPYC . 18912.24 |==============================================


PostgreSQL pgbench 10.3
Scaling: Buffer Test - Test: Single Thread - Mode: Read Only
TPS > Higher Is Better
Default: Xeon ....... 19183.95 |===========================================
No Mitigation: Xeon . 20927.92 |===============================================
Default: EPYC ....... 13418.48 |==============================
No Mitigation: EPYC . 13933.94 |===============================


PostgreSQL pgbench 10.3
Scaling: Buffer Test - Test: Single Thread - Mode: Read Write
TPS > Higher Is Better
Default: Xeon ....... 454.83  |===========
No Mitigation: Xeon . 463.33  |===========
Default: EPYC ....... 2035.47 |===============================================
No Mitigation: EPYC . 2056.96 |================================================


Redis 4.0.8
Test: LPOP
Requests Per Second > Higher Is Better
Default: Xeon .................. 1605734.42 |==================================
No Mitigation: Xeon ............ 1449609.17 |===============================
Default: EPYC .................. 1167236.62 |=========================
No Mitigation: EPYC ............ 832909.06  |==================
Default: C240M4-E52650v4 ....... 1487480.25 |===============================
No Mitigation: C240M4-E52650v4 . 994366.15  |=====================


Redis 4.0.8
Test: SADD
Requests Per Second > Higher Is Better
Default: Xeon .................. 1360277.75 |=================================
No Mitigation: Xeon ............ 1421813.12 |==================================
Default: EPYC .................. 1000430.87 |========================
No Mitigation: EPYC ............ 1026789.50 |=========================
Default: C240M4-E52650v4 ....... 1202903.54 |=============================
No Mitigation: C240M4-E52650v4 . 1213140.08 |=============================


Redis 4.0.8
Test: LPUSH
Requests Per Second > Higher Is Better
Default: Xeon .................. 1105101.92 |=================================
No Mitigation: Xeon ............ 1155179.38 |==================================
Default: EPYC .................. 790912.27  |=======================
No Mitigation: EPYC ............ 803664.96  |========================
Default: C240M4-E52650v4 ....... 936269.56  |============================
No Mitigation: C240M4-E52650v4 . 941693.52  |============================


Redis 4.0.8
Test: GET
Requests Per Second > Higher Is Better
Default: Xeon .................. 1610474.09 |==================================
No Mitigation: Xeon ............ 1609005.09 |==================================
Default: EPYC .................. 1153713.90 |========================
No Mitigation: EPYC ............ 1143321.88 |========================
Default: C240M4-E52650v4 ....... 1437054.88 |==============================
No Mitigation: C240M4-E52650v4 . 1374598.17 |=============================


Redis 4.0.8
Test: SET
Requests Per Second > Higher Is Better
Default: Xeon .................. 1232095.75 |================================
No Mitigation: Xeon ............ 1308916.96 |==================================
Default: EPYC .................. 899226.97  |=======================
No Mitigation: EPYC ............ 919106.95  |========================
Default: C240M4-E52650v4 ....... 1091377.62 |============================
No Mitigation: C240M4-E52650v4 . 1104343.37 |=============================


Stress-NG 0.07.26
Test: Forking
Bogo Ops/s > Higher Is Better
Default: Xeon .................. 64139.63 |==============================
No Mitigation: Xeon ............ 64683.94 |==============================
Default: EPYC .................. 42635.50 |====================
No Mitigation: EPYC ............ 45411.65 |=====================
Default: C240M4-E52650v4 ....... 77255.48 |====================================
No Mitigation: C240M4-E52650v4 . 75866.15 |===================================


Stress-NG 0.07.26
Test: Semaphores
Bogo Ops/s > Higher Is Better
Default: Xeon .................. 229301.54 |==============
No Mitigation: Xeon ............ 247476.16 |================
Default: EPYC .................. 237838.14 |===============
No Mitigation: EPYC ............ 241176.07 |===============
Default: C240M4-E52650v4 ....... 373271.38 |=======================
No Mitigation: C240M4-E52650v4 . 558506.60 |===================================


Stress-NG 0.07.26
Test: Socket Activity
Bogo Ops/s > Higher Is Better
Default: Xeon .................. 3300.35 |=============
No Mitigation: Xeon ............ 3297.64 |=============
Default: EPYC .................. 3409.01 |=============
No Mitigation: EPYC ............ 3413.08 |=============
Default: C240M4-E52650v4 ....... 9337.64 |=====================================
No Mitigation: C240M4-E52650v4 . 9387.77 |=====================================


Stress-NG 0.07.26
Test: Context Switching
Bogo Ops/s > Higher Is Better
Default: Xeon .................. 15540101.78 |=============================
No Mitigation: Xeon ............ 17854342.78 |=================================
Default: EPYC .................. 14023842.08 |==========================
No Mitigation: EPYC ............ 13329232.97 |=========================
Default: C240M4-E52650v4 ....... 8375392.54  |===============
No Mitigation: C240M4-E52650v4 . 8600576.43  |================


Stress-NG 0.07.26
Test: System V Message Passing
Bogo Ops/s > Higher Is Better
Default: Xeon .................. 5535241.82 |================================
No Mitigation: Xeon ............ 5877638.95 |==================================
Default: EPYC .................. 4828921.70 |============================
No Mitigation: EPYC ............ 4984809.43 |=============================
Default: C240M4-E52650v4 ....... 4525754.96 |==========================
No Mitigation: C240M4-E52650v4 . 4573240.46 |==========================


RAR Compression 5.6.b1
Linux Source Tree Archiving To RAR
Seconds < Lower Is Better
Default: Xeon ....... 163.79 |======================================
No Mitigation: Xeon . 169.81 |=======================================
Default: EPYC ....... 212.20 |=================================================
No Mitigation: EPYC . 207.09 |================================================


Git
Time To Complete Common Git Commands
Seconds < Lower Is Better
Default: Xeon .................. 6.23 |===============================
No Mitigation: Xeon ............ 6.24 |===============================
Default: EPYC .................. 7.52 |======================================
No Mitigation: EPYC ............ 7.60 |======================================
Default: C240M4-E52650v4 ....... 7.93 |========================================
No Mitigation: C240M4-E52650v4 . 7.95 |========================================


Schbench
Message Threads: 8 - Workers Per Message Thread: 4
usec, 99.9th Latency Percentile < Lower Is Better
Default: Xeon .................. 131 |==============
No Mitigation: Xeon ............ 107 |============
Default: EPYC .................. 379 |=========================================
No Mitigation: EPYC ............ 380 |=========================================
Default: C240M4-E52650v4 ....... 76  |========
No Mitigation: C240M4-E52650v4 . 75  |========


Schbench
Message Threads: 8 - Workers Per Message Thread: 6
usec, 99.9th Latency Percentile < Lower Is Better
Default: Xeon .................. 119  |=
No Mitigation: Xeon ............ 122  |=
Default: EPYC .................. 394  |===
No Mitigation: EPYC ............ 375  |===
Default: C240M4-E52650v4 ....... 4557 |========================================
No Mitigation: C240M4-E52650v4 . 4037 |===================================