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[Qemu-devel] [PATCH 00/10] cputlb: track dirty tlbs and general cleanup
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 00/10] cputlb: track dirty tlbs and general cleanup |
Date: |
Tue, 23 Oct 2018 08:02:42 +0100 |
The motivation here is reducing the total overhead.
Before a few patches went into target-arm.next, I measured total
tlb flush overhead for aarch64 at 25%. This appears to reduce the
total overhead to about 5% (I do need to re-run the control tests,
not just watch perf top as I'm doing now).
The final patch is somewhat of an RFC. I'd like to know what
benchmark was used when putting in pending_tlb_flushes, and I
have not done any archaeology to find out. I suspect that it
does make any measurable difference beyond tlb_c.dirty, and I
think the code is a bit cleaner without it.
r~
Richard Henderson (10):
cputlb: Move tlb_lock to CPUTLBCommon
cputlb: Remove tcg_enabled hack from tlb_flush_nocheck
cputlb: Move cpu->pending_tlb_flush to env->tlb_c.pending_flush
cputlb: Split large page tracking per mmu_idx
cputlb: Move env->vtlb_index to env->tlb_d.vindex
cputlb: Merge tlb_flush_nocheck into tlb_flush_by_mmuidx_async_work
cputlb: Merge tlb_flush_page into tlb_flush_page_by_mmuidx
cputlb: Count "partial" and "elided" tlb flushes
cputlb: Filter flushes on already clean tlbs
cputlb: Remove tlb_c.pending_flushes
include/exec/cpu-defs.h | 51 +++++-
include/exec/cputlb.h | 2 +-
include/qom/cpu.h | 6 -
accel/tcg/cputlb.c | 354 +++++++++++++++-----------------------
accel/tcg/translate-all.c | 8 +-
5 files changed, 184 insertions(+), 237 deletions(-)
--
2.17.2
- [Qemu-devel] [PATCH 00/10] cputlb: track dirty tlbs and general cleanup,
Richard Henderson <=
- [Qemu-devel] [PATCH 10/10] cputlb: Remove tlb_c.pending_flushes, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 01/10] cputlb: Move tlb_lock to CPUTLBCommon, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 06/10] cputlb: Merge tlb_flush_nocheck into tlb_flush_by_mmuidx_async_work, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 02/10] cputlb: Remove tcg_enabled hack from tlb_flush_nocheck, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 03/10] cputlb: Move cpu->pending_tlb_flush to env->tlb_c.pending_flush, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 08/10] cputlb: Count "partial" and "elided" tlb flushes, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 09/10] cputlb: Filter flushes on already clean tlbs, Richard Henderson, 2018/10/23
- [Qemu-devel] [PATCH 04/10] cputlb: Split large page tracking per mmu_idx, Richard Henderson, 2018/10/23