linux多核cpu控制启动核数

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1、Linux多核CPU控制启动核数修改/boot/grub/grub.conf，在kernel行最后加入maxcpus=n(n为需要启动的核数） 例如原来的grub.conf文件如下：#grub.confgeneratedbyanaconda##Notethatyoudonothavetorerungrubaftermakingchangestothisfile#NOTICE: Youhavea/bootpartition. Thismeansthat#         allkernelandinitrdpathsarerelativeto/boot/,eg

2、.#         root(hd0,0)#         kernel/vmlinuz-versionroroot=/dev/VolGroup00/LogVol00#         initrd/initrd-version.img#boot=/dev/sdadefault=0timeout=5splashimage=(hd0,0)/grub/splash.xpm.gzhiddenmenutitleRedHatEnterpriseLinuxServer(2.6.18-164.el5) root(hd0,0) kernel/vmlinuz-2.6.18

3、-164.el5roroot=/dev/VolGroup00/LogVol00rhgbquiet initrd/initrd-2.6.18-164.el5.img 修改为：#grub.confgeneratedbyanaconda##Notethatyoudonothavetorerungrubaftermakingchangestothisfile#NOTICE: Youhavea/bootpartition. Thismeansthat#         allkernelandinitrdpathsarerelativeto/boot/,eg.#   

4、      root(hd0,0)#         kernel/vmlinuz-versionroroot=/dev/VolGroup00/LogVol00#         initrd/initrd-version.img#boot=/dev/sdadefault=0timeout=5splashimage=(hd0,0)/grub/splash.xpm.gzhiddenmenutitleRedHatEnterpriseLinuxServer(2.6.18-164.el5) root(hd0,0) kernel/vmlinuz-2.6.18-164.

5、el5roroot=/dev/VolGroup00/LogVol00rhgbquietmaxcpus=4 initrd/initrd-2.6.18-164.el5.img 则reboot后启动的核数为4