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From: | Richard Henderson |
Subject: | Re: [Qemu-arm] [PATCH v6 18/19] target-arm: don't generate WFE/YIELD calls for MTTCG |
Date: | Thu, 10 Nov 2016 18:59:03 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 11/09/2016 03:57 PM, Alex Bennée wrote:
The WFE and YIELD instructions are really only hints and in TCG's case they were useful to move the scheduling on from one vCPU to the next. In the parallel context (MTTCG) this just causes an unnecessary cpu_exit and contention of the BQL. Signed-off-by: Alex Bennée <address@hidden> --- target-arm/op_helper.c | 7 +++++++ target-arm/translate-a64.c | 8 ++++++-- target-arm/translate.c | 20 ++++++++++++++++---- 3 files changed, 29 insertions(+), 6 deletions(-)
Reviewed-by: Richard Henderson <address@hidden> r~
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