~/M/rio ❯❯❯ command time dd if=/dev/zero bs=1M count=4096 of=file
0.00user 5.15system 0:12.81elapsed 40%CPU (0avgtext+0avgdata 2980maxresident)k
80inputs+8388608outputs (1major+340minor)pagefaults 0swaps
~/M/rio ❯❯❯ command time target/release/examples/o_direct
0.19user 0.24system 0:14.15elapsed 3%CPU (0avgtext+0avgdata 4168maxresident)k
4904inputs+0outputs (1major+940minor)pagefaults 0swaps
5.4.7
btrfs, 19GB free without the 4GB file
Laptop nvme ssd, probably fairly mediocre?
~/M/rio ❯❯❯ sudo smartctl -i /dev/nvme0
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.7-arch1-1] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Number: KXG50ZNV256G TOSHIBA
Serial Number: X8CB31GNK5PS
Firmware Version: AAXA4103
PCI Vendor/Subsystem ID: 0x1179
IEEE OUI Identifier: 0x00080d
Total NVM Capacity: 256,060,514,304 [256 GB]
Unallocated NVM Capacity: 0
Controller ID: 0
Number of Namespaces: 1
Namespace 1 Size/Capacity: 256,060,514,304 [256 GB]
Namespace 1 Formatted LBA Size: 512
Namespace 1 IEEE EUI-64: 00080d 030046562f
Local Time is: Tue Jan 7 15:01:21 2020 NZDT