Linux 4.20 IO Scheduler Tests
Linux 4.20 I/O scheduler tests by Michael Larabel on NVMe SSD storage for a future article on Phoronix.


None: 

	Processor: AMD Ryzen Threadripper 2990WX 32-Core @ 3.00GHz (32 Cores / 64 Threads), Motherboard: ASUS ROG ZENITH EXTREME (1501 BIOS), Chipset: AMD Family 17h, Memory: 4 x 8192 MB DDR4-1600MT/s F4-3200C14-8GFX, Disk: Samsung SSD 970 EVO 500GB, Graphics: AMD Radeon RX Vega 8GB, Audio: Realtek ALC1220, Monitor: ASUS VP28U, Network: Intel I211 Gigabit Connection + Qualcomm Atheros QCA6174 802.11ac Wireless

	OS: Ubuntu 18.10, Kernel: 4.20.0-999-generic (x86_64) 20181201, Desktop: GNOME Shell 3.30.1, Display Server: X Server, OpenGL: 4.5 Mesa 18.2.2 (LLVM 7.0.0), Vulkan: 1.1.70, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

MQ Deadline: 

	Processor: AMD Ryzen Threadripper 2990WX 32-Core @ 3.00GHz (32 Cores / 64 Threads), Motherboard: ASUS ROG ZENITH EXTREME (1501 BIOS), Chipset: AMD Family 17h, Memory: 4 x 8192 MB DDR4-1600MT/s F4-3200C14-8GFX, Disk: Samsung SSD 970 EVO 500GB, Graphics: AMD Radeon RX Vega 8GB, Audio: Realtek ALC1220, Monitor: ASUS VP28U, Network: Intel I211 Gigabit Connection + Qualcomm Atheros QCA6174 802.11ac Wireless

	OS: Ubuntu 18.10, Kernel: 4.20.0-999-generic (x86_64) 20181201, Desktop: GNOME Shell 3.30.1, Display Server: X Server, OpenGL: 4.5 Mesa 18.2.2 (LLVM 7.0.0), Vulkan: 1.1.70, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

Kyber: 

	Processor: AMD Ryzen Threadripper 2990WX 32-Core @ 3.00GHz (32 Cores / 64 Threads), Motherboard: ASUS ROG ZENITH EXTREME (1501 BIOS), Chipset: AMD Family 17h, Memory: 4 x 8192 MB DDR4-1600MT/s F4-3200C14-8GFX, Disk: Samsung SSD 970 EVO 500GB, Graphics: AMD Radeon RX Vega 8GB, Audio: Realtek ALC1220, Monitor: ASUS VP28U, Network: Intel I211 Gigabit Connection + Qualcomm Atheros QCA6174 802.11ac Wireless

	OS: Ubuntu 18.10, Kernel: 4.20.0-999-generic (x86_64) 20181201, Desktop: GNOME Shell 3.30.1, Display Server: X Server, OpenGL: 4.5 Mesa 18.2.2 (LLVM 7.0.0), Vulkan: 1.1.70, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

BFQ low_latency: 

	Processor: AMD Ryzen Threadripper 2990WX 32-Core @ 3.00GHz (32 Cores / 64 Threads), Motherboard: ASUS ROG ZENITH EXTREME (1501 BIOS), Chipset: AMD Family 17h, Memory: 4 x 8192 MB DDR4-1600MT/s F4-3200C14-8GFX, Disk: Samsung SSD 970 EVO 500GB, Graphics: AMD Radeon RX Vega 8GB, Audio: Realtek ALC1220, Monitor: ASUS VP28U, Network: Intel I211 Gigabit Connection + Qualcomm Atheros QCA6174 802.11ac Wireless

	OS: Ubuntu 18.10, Kernel: 4.20.0-999-generic (x86_64) 20181201, Desktop: GNOME Shell 3.30.1, Display Server: X Server, OpenGL: 4.5 Mesa 18.2.2 (LLVM 7.0.0), Vulkan: 1.1.70, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

BFQ: 

	Processor: AMD Ryzen Threadripper 2990WX 32-Core @ 3.00GHz (32 Cores / 64 Threads), Motherboard: ASUS ROG ZENITH EXTREME (1501 BIOS), Chipset: AMD Family 17h, Memory: 4 x 8192 MB DDR4-1600MT/s F4-3200C14-8GFX, Disk: Samsung SSD 970 EVO 500GB, Graphics: AMD Radeon RX Vega 8GB, Audio: Realtek ALC1220, Monitor: ASUS VP28U, Network: Intel I211 Gigabit Connection + Qualcomm Atheros QCA6174 802.11ac Wireless

	OS: Ubuntu 18.10, Kernel: 4.20.0-999-generic (x86_64) 20181201, Desktop: GNOME Shell 3.30.1, Display Server: X Server, OpenGL: 4.5 Mesa 18.2.2 (LLVM 7.0.0), Vulkan: 1.1.70, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160


Application Start-up Time 2.4.0
Background I/O Mix: Only Sequential Reads - Application To Start: xterm - Disk Target: Default Test Directory
sec < Lower Is Better
None ............ 0.54 |======================================================
MQ Deadline ..... 0.54 |======================================================
Kyber ........... 0.54 |======================================================
BFQ low_latency . 0.17 |=================
BFQ ............. 0.55 |=======================================================


Application Start-up Time 2.4.0
Background I/O Mix: Sequential Reads + Writes - Application To Start: xterm - Disk Target: Default Test Directory
sec < Lower Is Better
None ............ 0.75 |=====================================
MQ Deadline ..... 1.12 |=======================================================
Kyber ........... 1.06 |====================================================
BFQ low_latency . 0.18 |=========
BFQ ............. 1.12 |=======================================================


Application Start-up Time 2.4.0
Background I/O Mix: Only Sequential Reads - Application To Start: GNOME Terminal - Disk Target: Default Test Directory
sec < Lower Is Better
None ............ 2.13 |====================================================
MQ Deadline ..... 2.17 |=====================================================
Kyber ........... 2.11 |====================================================
BFQ low_latency . 0.30 |=======
BFQ ............. 2.24 |=======================================================


Application Start-up Time 2.4.0
Background I/O Mix: Only Sequential Reads - Application To Start: LibreOffice Writer - Disk Target: Default Test Directory
sec < Lower Is Better
None ............ 1.77 |======================================================
MQ Deadline ..... 1.73 |=====================================================
Kyber ........... 1.79 |=======================================================
BFQ low_latency . 0.25 |========
BFQ ............. 1.78 |=======================================================


Application Start-up Time 2.4.0
Background I/O Mix: Sequential Reads + Writes - Application To Start: GNOME Terminal - Disk Target: Default Test Directory
sec < Lower Is Better
None ............ 3.22 |=======================================
MQ Deadline ..... 4.44 |=====================================================
Kyber ........... 4.59 |=======================================================
BFQ low_latency . 0.55 |=======
BFQ ............. 4.45 |=====================================================


Application Start-up Time 2.4.0
Background I/O Mix: Sequential Reads + Writes - Application To Start: LibreOffice Writer - Disk Target: Default Test Directory
sec < Lower Is Better
None ............ 2.49 |=======================================
MQ Deadline ..... 3.40 |=====================================================
Kyber ........... 3.52 |=======================================================
BFQ low_latency . 0.34 |=====
BFQ ............. 3.17 |==================================================


SQLite 3.22
Timed SQLite Insertions
Seconds < Lower Is Better
None ............ 35.95 |===================================================
MQ Deadline ..... 37.95 |======================================================
Kyber ........... 37.96 |======================================================
BFQ low_latency . 36.21 |====================================================
BFQ ............. 37.31 |=====================================================


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
None ............ 3322 |======================================================
MQ Deadline ..... 3362 |=======================================================
Kyber ........... 3362 |=======================================================
BFQ low_latency . 3342 |=======================================================
BFQ ............. 3368 |=======================================================


Flexible IO Tester 3.1
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
None ............ 666 |=================================================
MQ Deadline ..... 764 |========================================================
Kyber ........... 754 |=======================================================
BFQ low_latency . 716 |====================================================
BFQ ............. 752 |=======================================================


Flexible IO Tester 3.1
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
None ............ 170333 |==============================================
MQ Deadline ..... 195667 |=====================================================
Kyber ........... 193000 |====================================================
BFQ low_latency . 183667 |==================================================
BFQ ............. 192667 |====================================================


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
None ............ 2362 |=======================================================
MQ Deadline ..... 2369 |=======================================================
Kyber ........... 2369 |=======================================================
BFQ low_latency . 2371 |=======================================================
BFQ ............. 2365 |=======================================================


Flexible IO Tester 3.1
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
None ............ 1011 |=======================================================
MQ Deadline ..... 886  |================================================
Kyber ........... 944  |===================================================
BFQ low_latency . 712  |=======================================
BFQ ............. 710  |=======================================


Flexible IO Tester 3.1
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
None ............ 259000 |=====================================================
MQ Deadline ..... 226667 |==============================================
Kyber ........... 242000 |==================================================
BFQ low_latency . 182333 |=====================================
BFQ ............. 181667 |=====================================


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
None ............ 1030 |=======================================================
MQ Deadline ..... 1034 |=======================================================
Kyber ........... 1029 |=======================================================
BFQ low_latency . 1033 |=======================================================
BFQ ............. 1033 |=======================================================


Flexible IO Tester 3.1
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
None ............ 956 |========================================================
MQ Deadline ..... 962 |========================================================
Kyber ........... 953 |=======================================================
BFQ low_latency . 761 |============================================
BFQ ............. 780 |=============================================


Flexible IO Tester 3.1
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
None ............ 244667 |=====================================================
MQ Deadline ..... 246000 |=====================================================
Kyber ........... 243667 |====================================================
BFQ low_latency . 194750 |==========================================
BFQ ............. 199333 |===========================================


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
None ............ 2402 |=======================================================
MQ Deadline ..... 2400 |=======================================================
Kyber ........... 2394 |=======================================================
BFQ low_latency . 2401 |=======================================================
BFQ ............. 2394 |=======================================================


Flexible IO Tester 3.1
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
None ............ 1022 |=======================================================
MQ Deadline ..... 939  |===================================================
Kyber ........... 949  |===================================================
BFQ low_latency . 712  |======================================
BFQ ............. 721  |=======================================


Flexible IO Tester 3.1
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
None ............ 261667 |=====================================================
MQ Deadline ..... 240333 |=================================================
Kyber ........... 243000 |=================================================
BFQ low_latency . 182417 |=====================================
BFQ ............. 184667 |=====================================


FS-Mark 3.3
Test: 1000 Files, 1MB Size
Files/s > Higher Is Better
None ............ 234 |========================================================
MQ Deadline ..... 224 |======================================================
Kyber ........... 227 |======================================================
BFQ low_latency . 232 |========================================================
BFQ ............. 229 |=======================================================


FS-Mark 3.3
Test: 5000 Files, 1MB Size, 4 Threads
Files/s > Higher Is Better
None ............ 203 |===============================================
MQ Deadline ..... 149 |==================================
Kyber ........... 152 |===================================
BFQ low_latency . 216 |==================================================
BFQ ............. 244 |========================================================


FS-Mark 3.3
Test: 4000 Files, 32 Sub Dirs, 1MB Size
Files/s > Higher Is Better
None ............ 96.03  |=========================================
MQ Deadline ..... 91.91  |=======================================
Kyber ........... 84.28  |====================================
BFQ low_latency . 125.08 |=====================================================
BFQ ............. 124.66 |=====================================================


FS-Mark 3.3
Test: 1000 Files, 1MB Size, No Sync/FSync
Files/s > Higher Is Better
None ............ 2320 |=======================================================
MQ Deadline ..... 2319 |=======================================================
Kyber ........... 2315 |=======================================================
BFQ low_latency . 2305 |=======================================================
BFQ ............. 2289 |======================================================


BlogBench 1.0
Test: Read
Final Score > Higher Is Better
None ............ 726638 |=========================================
MQ Deadline ..... 929021 |=====================================================
Kyber ........... 929293 |=====================================================
BFQ low_latency . 488353 |============================
BFQ ............. 475934 |===========================


BlogBench 1.0
Test: Write
Final Score > Higher Is Better
None ............ 14318 |========================================
MQ Deadline ..... 12993 |=====================================
Kyber ........... 13856 |=======================================
BFQ low_latency . 19135 |======================================================
BFQ ............. 18239 |===================================================


PostgreSQL pgbench 10.3
Scaling: Buffer Test - Test: Normal Load - Mode: Read Write
TPS > Higher Is Better
None ............ 4285 |===========================================
MQ Deadline ..... 4381 |============================================
Kyber ........... 4609 |==============================================
BFQ low_latency . 5477 |=======================================================
BFQ ............. 5151 |====================================================