Ben Stienstra

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simple_sequential_baseline_test

From: https://communities.intel.com/community/itpeernetwork/blog/2013/11/22/making-friends-with-your-new-ssd--a-simple-baseline

Direct Write Test, simple benchmark with dd

First off remember system OS'es, and controllers, are always setup for caching and buffering, so use DirectIO, here is an example syntax that should work on most flavors of Linux/Unix, or try Cygwin on Windows to achieve the same. So to me it seems amazingly universal but you tell me, is there a more universal tool than “dd” out there that's more powerful and more standard for a fast memory to device copy test.

$ time dd if=/dev/zero of=tstfile bs=2048k count=512 oflag=direct
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB) copied, 3.53208 s, 304 MB/s

real 0m3.619s
user 0m0.187s
sys 0m0.217s

Direct Read Test

You can reverse things to see what the read test looks like, things should be faster on reads in all cases with respect to the SSD:

$ time dd of=/dev/null if=tstfile bs=2048k count=512 iflag=direct
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB) copied, 3.45007 s, 311 MB/s

real 0m3.463s
user 0m0.015s

Read Cache Test

(testing the DRAM memory, and system in this case)

$ time dd of=/dev/null if=tstfile bs=2048k count=512
2048+0 records in
2048+0 records out
1073741824 bytes (1.1 GB) copied, 0.280394 s, 3.8 GB/s

real 0m0.296s
user 0m0.000s
sys 0m0.296s

IBM P520, POWER6, PowerVM (with RHEL6), Hitachi Ultrastar 15K300 SAS, 147GB

Direct write: 1073741824 bytes (1.1 GB) copied, 14.604 s, 73.5 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 16.7439 s, 64.1 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 0.354082 s, 3.0 GB/s

USB UAS attached Samsung 850 EVO 500GB SSD, attached to Intel NUC NUC6i7KYK

Benchmarking an encrypted filesystem, the speed drops to around 370MB/sec write, 430MB/sec read.

Direct write: 2147483648 bytes (2,1 GB, 2,0 GiB) copied, 5,11402 s, 420 MB/s
Direct read:  2147483648 bytes (2,1 GB, 2,0 GiB) copied, 4,7174 s, 455 MB/s
Read cache:   2147483648 bytes (2,1 GB, 2,0 GiB) copied, 0,295798 s, 7,3 GB/s

USB UAS attached Samsung 850 EVO 500GB SSD, attached to Lenovo X1 carbon (2015), LUKS encrypted fs

Direct write: 1073741824 bytes (1,1 GB, 1,0 GiB) copied, 3,23224 s, 332 MB/s
Direct read:  1073741824 bytes (1,1 GB, 1,0 GiB) copied, 3,14576 s, 341 MB/s
Read cache:   1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,151628 s, 7,1 GB/s

Intel NUC Kit NUC6i7KYK / Samsung SM951 256GB (NVMe) - MZVPV256HDGL

With this fast SSD a larger blocksize (32M) was needed to reach the GB/s speed.

Direct write: 1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,889314 s, 1,2 GB/s
Direct read:  1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,513717 s, 2,1 GB/s
Read cache:   1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,154132 s, 7,0 GB/s

Raspberry Pi 3 Model B 1GB. Transcend 32GB microSD Premium 400x Class 10 UHS-I

Direct write: 1073741824 bytes (1.1 GB) copied, 100.578 s, 10.7 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 47.0731 s, 22.8 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 49.5828 s, 21.7 MB/s

Raspberry Pi 4 Model B 4GB. Transcend 8GB microSD Ultimate 600x Class 10 UHS-I

Direct write: 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 53.5692 s, 20.0 MB/s
Direct read:  1073741824 bytes (1.1 GB, 1.0 GiB) copied, 25.1142 s, 42.8 MB/s
Read cache:   1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.49443 s, 718 MB/s

Raspberry Pi 4 Model B 4GB. SanDisk Ultra 32GB USB 3 thumb drive

Write speed was not stable, device very hot.

Direct write: 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 23.8766 s, 45.0 MB/s
Direct read:  1073741824 bytes (1.1 GB, 1.0 GiB) copied, 9.29304 s, 116 MB/s
Read cache:   1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.56342 s, 687 MB/s

Raspberry Pi 4 Model B 4GB. Samsung portable SSD T5

Direct write: 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 4.71707 s, 228 MB/s
Direct read:  1073741824 bytes (1.1 GB, 1.0 GiB) copied, 3.50969 s, 306 MB/s
Read cache:   1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.53438 s, 700 MB/s

PC Engines APU with 16GB SSD - SuperSSpeed S328 16GB

Direct write: 1073741824 bytes (1.1 GB) copied, 41.7628 s, 25.7 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 5.9659 s, 180 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 1.15947 s, 926 MB/s

PC Engines APU with 30GB SSD - Kingston SMS200S330G

Direct write: 1073741824 bytes (1.1 GB) copied, 3.51081 s, 306 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 3.0644 s, 350 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 1.44341 s, 744 MB/s

md RAID1 with Crucial/Micron RealSSD C300/C400/m4

Direct write: 1073741824 bytes (1.1 GB) copied, 9.86249 s, 109 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 3.82096 s, 281 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 0.10913 s, 9.8 GB/s

Proliant DL320e G8 hardware raid / P222 controller / RAID 10 4x SATA LFF

Direct write: 1073741824 bytes (1.1 GB) copied, 3.20435 s, 335 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 3.21506 s, 334 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 0.192178 s, 5.6 GB/s

Proliant DL320e G8 v2 hardware raid / P222 controller / RAID 10 4x SAS SFF

Direct write: 1073741824 bytes (1.1 GB) copied, 2.17193 s, 494 MB/s
Direct read:  1073741824 bytes (1.1 GB) copied, 2.17759 s, 493 MB/s
Read cache:   1073741824 bytes (1.1 GB) copied, 0.110266 s, 9.7 GB/s
simple_sequential_baseline_test.txt · Last modified: 2019/06/28 21:06 by admin