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JonMagon / KDiskMark

A simple open-source disk benchmark tool for Linux distros
GNU General Public License v3.0
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Incorrect performance on NTFS partition on HDD #122

Open TheBicPen opened 1 year ago

TheBicPen commented 1 year ago

Description:

Performance appears incorrect for NTFS drive. The read speeds are impossibly high for an HDD connected over USB3. The write speeds are lower than I would expect, but that may just be the driver's fault.

Steps To Reproduce:

Run on NTFS partition on USB3 HDD, using NTFS-3G driver.

                        KDiskMark (3.1.3): https://github.com/JonMagon/KDiskMark
                    Flexible I/O Tester (fio-3.34): https://github.com/axboe/fio
--------------------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

[Read]
Sequential   1 MiB (Q=  8, T= 1):  5683.719 MB/s [   5550.5 IOPS] <  1417.53 us>
Sequential   1 MiB (Q=  1, T= 1):  6310.817 MB/s [   6162.9 IOPS] <   161.15 us>
    Random   4 KiB (Q= 32, T= 1):   755.180 MB/s [ 188795.1 IOPS] <   169.29 us>
    Random   4 KiB (Q=  1, T= 1):   753.670 MB/s [ 188417.6 IOPS] <     5.17 us>

[Write]
Sequential   1 MiB (Q=  8, T= 1):    11.009 MB/s [     10.8 IOPS] <  2564.91 us>
Sequential   1 MiB (Q=  1, T= 1):    10.485 MB/s [     10.2 IOPS] <   238.27 us>
    Random   4 KiB (Q= 32, T= 1):     6.108 MB/s [   1527.0 IOPS] <   377.90 us>
    Random   4 KiB (Q=  1, T= 1):     4.234 MB/s [   1058.5 IOPS] <    11.58 us>

Profile: Default
   Test: 1 GiB (x5) [Measure: 5 sec / Interval: 5 sec]
   Date: 2023-06-18 13:37:59

Same drive on Windows looks reasonable:

------------------------------------------------------------------------------
CrystalDiskMark 8.0.4 x64 (C) 2007-2021 hiyohiyo
                                  Crystal Dew World: https://crystalmark.info/
------------------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

[Read]
  SEQ    1MiB (Q=  8, T= 1):    68.943 MB/s [     65.7 IOPS] <120142.86 us>
  SEQ    1MiB (Q=  1, T= 1):    65.787 MB/s [     62.7 IOPS] < 15884.81 us>
  RND    4KiB (Q= 32, T= 1):     1.068 MB/s [    260.7 IOPS] <118571.44 us>
  RND    4KiB (Q=  1, T= 1):     0.422 MB/s [    103.0 IOPS] <  9676.17 us>

[Write]
  SEQ    1MiB (Q=  8, T= 1):    93.746 MB/s [     89.4 IOPS] < 84761.63 us>
  SEQ    1MiB (Q=  1, T= 1):    69.955 MB/s [     66.7 IOPS] < 13087.88 us>
  RND    4KiB (Q= 32, T= 1):     5.369 MB/s [   1310.8 IOPS] < 24361.27 us>
  RND    4KiB (Q=  1, T= 1):     5.588 MB/s [   1364.3 IOPS] <   730.32 us>

Profile: Default
   Test: 1 GiB (x5) [E: 88% (1229/1397GiB)]
   Mode: [Admin]
   Time: Measure 5 sec / Interval 5 sec 
   Date: 2023/07/09 14:33:14
     OS: Windows 11  [10.0 Build 22621] (x64)
JonMagon commented 1 year ago

Enable pagecache flushing in settings.