![]() Reduce the startup time for slave cpus. Adds hooks for an arch-specific function for clock calibration. These hooks are used on x86. If a newly started cpu has the same phys_proc_id as a core already active, uses the TSC for the delay loop and has a CONSTANT_TSC, use the already-calculated value of loops_per_jiffy. This patch reduces the time required to start slave cpus on a 4096 cpu system from: 465 sec OLD 62 sec NEW This reduces boot time on a 4096p system by almost 7 minutes. Nice... Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: John Stultz <john.stultz@linaro.org> [fix CONFIG_SMP=n build] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> |
||
---|---|---|
.. | ||
calibrate.c | ||
do_mounts.c | ||
do_mounts.h | ||
do_mounts_initrd.c | ||
do_mounts_md.c | ||
do_mounts_rd.c | ||
initramfs.c | ||
Kconfig | ||
main.c | ||
Makefile | ||
noinitramfs.c | ||
version.c |