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[Qemu-ppc] [PATCH 1.7 0/2] PPC: Fix BookE timer performance regression

From: Alexander Graf
Subject: [Qemu-ppc] [PATCH 1.7 0/2] PPC: Fix BookE timer performance regression
Date: Sat, 23 Nov 2013 04:53:39 +0100

Thanks to the new timer infrastructure we are now able to trigger timer events
and ridiculous granularities in sub-microsecond orders.

However, the BookE targets were quite unhappy about that change, showing up
to x10 slowdown on a simple Linux guest bootup test.

This patch set makes the constant timer facilities in BookE more lazy and less
fine grained than they could be. That way we're at least as good as we were in
QEMU 1.6.

Alexander Graf (2):
  PPC: Make BookE FIT/WDT timers more lazy
  PPC: BookE: Make FIT/WDT timers at best millisecond grained

 hw/ppc/ppc_booke.c | 49 ++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 44 insertions(+), 5 deletions(-)


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