On 10-Jul-2003 Bruce Evans wrote: > On Thu, 10 Jul 2003, Julian Elischer wrote: > >> I have a small "proof of concept" scheduler hack at: >> http://www.freebsd.org/~julian/it.diff >> ... >> It's only implemented for SMP/i386 as the code to halt the cpu is only >> present (from my quick view) in x86 and it doesn't make sense in UP.. > > ipi_selected() is essentially MI although it is declared in > <machine/smp.h> and takes MD arg types, since it is used in subr_smp.c > and subr_smp.c is MI by definition. Its second arg is u_int64_t on > alphas, int on ia64's, and u_int on other arches. This isn't a problem > since the arg is always a #define'd value like IPI_AST and these values > have MD definitions. Its first arg has type u_int64_t on ia64's and > u_int on other arches. This is bogus for ia64's since subr_smp.c uses > u_int for all bitmaps of CPUs, so systems with more than 32 CPUs cannot > actually work. I'm actually not a big fan of the CPU bitmap thing, but perhaps an MD cpu_bitmap typedef should be defined? -- John Baldwin <jhb_at_FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/Received on Thu Jul 10 2003 - 12:35:50 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:37:14 UTC