NUMA特性禁用

一、检查OS是否开启NUMA

# numactl --hardware

二、Linux OS层面禁用NUMA

1、修改 grub.conf

# vi /boot/grub/grub.conf

#/* Copyright 2010, Oracle. All rights reserved. */

 

default=0

timeout=5

hiddenmenu

foreground=000000

background=ffffff

splashimage=(hd0,0)/boot/grub/oracle.xpm.gz

 

title Trying_C0D0_as_HD0

root (hd0,0)

kernel /boot/vmlinuz-2.6.18-128.1.16.0.1.el5 root=LABEL=DBSYS ro bootarea=dbsys rhgb quiet console=ttyS0,115200n8 console=tty1 crashkernel=128M@16M numa=off

initrd /boot/initrd-2.6.18-128.1.16.0.1.el5.img

 

2、重启Linux操作系统

# /sbin/reboot

 

3、确认OS层面禁用NUMA是否成功

# cat /proc/cmdline

root=LABEL=DBSYS ro bootarea=dbsys rhgb quiet console=ttyS0,115200n8 console=tty1 crashkernel=128M@16M numa=off

# numactl --hardware

 

三、SuSE Linux禁用NUMA示例

对于suse系统来说，只要不重新编译内核，系统默认是启用numa功能的（可以通过/boot/config-`uname -r`查看）。

尝试在/boot/grub/menu.lst文件中kernel一行的选项中添加 numa=off 参数禁止numa功能，重启系统生效。

# more /boot/grub/menu.lst

# Modified by YaST2. Last modification on Mon Dec 23 23:19:15 CST 2013

default 0

timeout 8

##YaST - generic_mbr

gfxmenu (hd0,7)/message

##YaST - activate

 

###Don't change this comment - YaST2 identifier: Original name: linux###

title SUSE Linux Enterprise Server 11 SP1 - 2.6.32.59-0.7

  root (hd0,7)

  kernel /vmlinuz-2.6.32.59-0.7-default root=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part2 resume=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part1 splash=silent crashkernel=256M-:128M showopts vga=0x31a elevator=deadline numa=off

  initrd /initrd-2.6.32.59-0.7-default

 

###Don't change this comment - YaST2 identifier: Original name: failsafe###

title Failsafe -- SUSE Linux Enterprise Server 11 SP1 - 2.6.32.59-0.7

  root (hd0,7)

  kernel /vmlinuz-2.6.32.59-0.7-default root=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part2 showopts ide=nodma apm=off noresume edd=off powersaved=off nohz=off highres=off processor.max_cstate=1 nomodeset x11failsafe vga=0x31a

  initrd /initrd-2.6.32.59-0.7-default

 

###Don't change this comment - YaST2 identifier: Original name: linux###

title SUSE Linux Enterprise Server 11 SP1 - 2.6.32.12-0.7

  root (hd0,7)

  kernel /vmlinuz-2.6.32.12-0.7-default root=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part2 resume=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part1 splash=silent crashkernel=256M-:128M showopts vga=0x31a

  initrd /initrd-2.6.32.12-0.7-default

 

###Don't change this comment - YaST2 identifier: Original name: failsafe###

title Failsafe -- SUSE Linux Enterprise Server 11 SP1 - 2.6.32.12-0.7

  root (hd0,7)

  kernel /vmlinuz-2.6.32.12-0.7-default root=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part2 showopts ide=nodma apm=off noresume edd=off powersaved=off nohz=off highres=off processor.max_cstate=1 nomodeset x11failsafe vga=0x31a

  initrd /initrd-2.6.32.12-0.7-default

 

 

# numactl --hardware

available: 1 nodes (0)

node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

node 0 size: 65519 MB

node 0 free: 61097 MB

No distance information available.

BMSuiteDB1:~ # cat /proc/cmdline

root=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part2 resume=/dev/disk/by-id/scsi-3600605b005a36fc0190ea623797d7bba-part1 splash=silent crashkernel=256M-:128M vga=0x31a elevator=deadline numa=off