GNU/Linux性能调优

IO Scheduler

/etc/udev/rules.d/60-ioschedulers.rules
---------------------------------------

# HDD
ACTION=="add|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"

# SSD
ACTION=="add|change", KERNEL=="sd[a-z]*|mmcblk[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="kyber"

# NVMe SSD
ACTION=="add|change", KERNEL=="nvme[0-9]*", ENV{DEVTYPE}=="disk", ATTR{queue/scheduler}="none"

SATA SSD用Kyber, HDD就用bfq, 对于NVME SSD就用none （不用调度器），如果是高IO吞吐就用mq-deadline

File System

选用XFS，如果是NVME可以考虑用F2FS，在defaults后面加noatime

/etc/fstab
----------

UUID=8e818668-8820-4e05-b96a-5af11f238dfa  /                xfs   defaults,noatime  0  0
UUID=60bfb94e-765a-4581-ad20-08885b3a5f33  /home            xfs   defaults,noatime  0  0
UUID=1ee3916e-5a47-4f76-9c76-ad6da35b8854  /home/GAME       xfs   defaults,noatime  0  0
UUID=19048c1d-ee7f-435b-a208-c8eaf45b03d0  /home/Downloads  xfs   defaults,noatime  0  0
UUID=BF02-DF77                             /boot/efi        vfat  utf8      0  2
UUID=b18519af-2e63-4c8b-b1f2-a4e5ae0772a1  swap             swap  defaults  0  0

Power Preference

在桌面环境的时候比如GNOME大部分发行版可以在直接在system tray切换电源策略为performance或者cli工具切换

1	powerprofilesctl set performance

CPUfreq Governor

先查看是否支持performance策略

1	cpupower frequency-info --governors

然后切换到performance策略

1	sudo cpupower frequency-set -g performance

当默认策略是schedutil的时候(绝大多数发行版默认内核是该策略)，也可以选择通过内核直接选performance强行使用performance策略

Power management and ACPI options --->
   CPU Frequency scaling --->
      Default CPUFreq governor (performance)  --->
         <X> performance

TCP BBR

/etc/sysctl.conf/99-tcp.conf
----------------------------

net.ipv4.tcp_congestion_control = bbr
net.core.default_qdisc = fq

随后应用这些设置

1	sudo sysctl -p

小工具：
https://github.com/fcanlnony/ptweak