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Re: [Qemu-devel] [PATCH v12 21/24] target-arm: don't generate WFE/YIELD
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From: |
Pranith Kumar |
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Subject: |
Re: [Qemu-devel] [PATCH v12 21/24] target-arm: don't generate WFE/YIELD calls for MTTCG |
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Date: |
Fri, 17 Feb 2017 12:17:51 -0500 |
On Mon, Feb 13, 2017 at 7:10 AM, Alex Bennée <address@hidden> 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.
>
I think something similar needs to be done for 'pause' on x86.
--
Pranith
- [Qemu-devel] [PATCH v12 12/24] tcg: handle EXCP_ATOMIC exception for system emulation, (continued)
- [Qemu-devel] [PATCH v12 12/24] tcg: handle EXCP_ATOMIC exception for system emulation, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 11/24] tcg: enable thread-per-vCPU, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 17/24] cputlb: add tlb_flush_by_mmuidx async routines, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 22/24] target-arm: ensure all cross vCPUs TLB flushes complete, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 21/24] target-arm: don't generate WFE/YIELD calls for MTTCG, Alex Bennée, 2017/02/13
- Re: [Qemu-devel] [PATCH v12 21/24] target-arm: don't generate WFE/YIELD calls for MTTCG,
Pranith Kumar <=
- [Qemu-devel] [PATCH v12 23/24] hw/misc/imx6_src: defer clearing of SRC_SCR reset bits, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 20/24] target-arm/powerctl: defer cpu reset work to CPU context, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 24/24] tcg: enable MTTCG by default for ARM on x86 hosts, Alex Bennée, 2017/02/13
- [Qemu-devel] [PATCH v12 19/24] cputlb: introduce tlb_flush_*_all_cpus[_synced], Alex Bennée, 2017/02/13