At system startup the processors were probably numbered 1,2,3,4 tne processor #3 won arbitration for BSP and was renumbered to #0. It's quite handy while setting breakpoints on an ICE to know that the BSP APIC ID is always the same no matter what your configuration is. --- George <[EMAIL PROTECTED]> wrote: > On Thu, 10 Jun 1999, Alan Cox wrote: > > >> Interesting fact: /proc/cpuinfo lists CPU#0, CPU#1, CPU#2 & > CPU#4. Why 4 > >> instead of 3? > > > >The numbers are assigned by the board vendor. I've no idea > why they chose > >those numbers but they did. > > Powers of two? Bit operations in BIOS? > > 0,1,2,4 makes a lot more sense than what my Intel board does: > > CPU0: Intel Pentium Pro stepping 07 > CPU12: Intel Pentium Pro stepping 07 > > 0 and 12?!? > > My Tyan board does the much more sensible combination: > > CPU0: Intel Pentium MMX stepping 03 > CPU1: Intel Pentium MMX stepping 03 > > -George Greer > > - > Linux SMP list: FIRST see FAQ at > http://www.irisa.fr/prive/mentre/smp-faq/ > To Unsubscribe: send "unsubscribe linux-smp" to > [EMAIL PROTECTED] > > > _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com - Linux SMP list: FIRST see FAQ at http://www.irisa.fr/prive/mentre/smp-faq/ To Unsubscribe: send "unsubscribe linux-smp" to [EMAIL PROTECTED]
