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[Qemu-devel] [PATCH v4 00/12] Reduce lock contention on TCG hot-path
From: |
Sergey Fedorov |
Subject: |
[Qemu-devel] [PATCH v4 00/12] Reduce lock contention on TCG hot-path |
Date: |
Fri, 15 Jul 2016 20:58:40 +0300 |
From: Sergey Fedorov <address@hidden>
Hi,
This is a respin of this series [1].
Here I used a modified version of Paolo's patch to docuement memory
ordering assumptions for certain QHT operations.
The last patch is a suggestion for renaming tb_find_physicall().
This series can be fetch from the public git repository:
https://github.com/sergefdrv/qemu.git lockless-tb-lookup-v4
[1] http://thread.gmane.org/gmane.comp.emulators.qemu/426341
Kind regards,
Sergey
Summary of changes in v4:
- Modified version of Paolo's patch is used to document memory ordering
assumptions for certain QHT operations
- Intermediate compilation errors fixed
- Atomic access to TB CPU state
- tb_find_physical() renamed
Summary of changes in v3:
- QHT memory ordering assumptions documented
- 'tb_jmp_cache' reset in tb_flush() made atomic
- explicit memory barriers removed around 'tb_jmp_cache' access
- safe access to 'tb_flushed' out of 'tb_lock' prepared
- TBs marked with invalid CPU state early on invalidation
- Alex's tb_find_{fast,slow}() roll-up related patches dropped
- bouncing of tb_lock between tb_gen_code() and tb_add_jump() avoided
with local variable 'have_tb_lock'
- tb_find_{fast,slow}() merged
Alex Bennée (2):
tcg: set up tb->page_addr before insertion
tcg: cpu-exec: remove tb_lock from the hot-path
Paolo Bonzini (1):
util/qht: Document memory ordering assumptions
Sergey Fedorov (9):
tcg: Pass last_tb by value to tb_find_fast()
tcg: Prepare safe tb_jmp_cache lookup out of tb_lock
tcg: Prepare safe access to tb_flushed out of tb_lock
target-i386: Remove redundant HF_SOFTMMU_MASK
tcg: Introduce tb_mark_invalid() and tb_is_invalid()
tcg: Prepare TB invalidation for lockless TB lookup
tcg: Avoid bouncing tb_lock between tb_gen_code() and tb_add_jump()
tcg: Merge tb_find_slow() and tb_find_fast()
tcg: rename tb_find_physical()
cpu-exec.c | 117 +++++++++++++++++++++--------------------------
include/exec/exec-all.h | 16 +++++++
include/qemu/qht.h | 5 ++
target-alpha/cpu.h | 14 ++++++
target-arm/cpu.h | 14 ++++++
target-cris/cpu.h | 14 ++++++
target-i386/cpu.c | 3 --
target-i386/cpu.h | 20 ++++++--
target-i386/translate.c | 12 ++---
target-lm32/cpu.h | 14 ++++++
target-m68k/cpu.h | 14 ++++++
target-microblaze/cpu.h | 14 ++++++
target-mips/cpu.h | 14 ++++++
target-moxie/cpu.h | 14 ++++++
target-openrisc/cpu.h | 14 ++++++
target-ppc/cpu.h | 14 ++++++
target-s390x/cpu.h | 14 ++++++
target-sh4/cpu.h | 14 ++++++
target-sparc/cpu.h | 14 ++++++
target-sparc/translate.c | 1 +
target-tilegx/cpu.h | 14 ++++++
target-tricore/cpu.h | 14 ++++++
target-unicore32/cpu.h | 14 ++++++
target-xtensa/cpu.h | 14 ++++++
translate-all.c | 29 ++++++------
util/qht.c | 7 ++-
26 files changed, 352 insertions(+), 96 deletions(-)
--
2.9.1
- [Qemu-devel] [PATCH v4 00/12] Reduce lock contention on TCG hot-path,
Sergey Fedorov <=
- [Qemu-devel] [PATCH v4 02/12] tcg: Pass last_tb by value to tb_find_fast(), Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 03/12] tcg: Prepare safe tb_jmp_cache lookup out of tb_lock, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 01/12] util/qht: Document memory ordering assumptions, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 04/12] tcg: Prepare safe access to tb_flushed out of tb_lock, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 08/12] tcg: set up tb->page_addr before insertion, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 07/12] tcg: Prepare TB invalidation for lockless TB lookup, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 05/12] target-i386: Remove redundant HF_SOFTMMU_MASK, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 06/12] tcg: Introduce tb_mark_invalid() and tb_is_invalid(), Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 09/12] tcg: cpu-exec: remove tb_lock from the hot-path, Sergey Fedorov, 2016/07/15
- [Qemu-devel] [PATCH v4 10/12] tcg: Avoid bouncing tb_lock between tb_gen_code() and tb_add_jump(), Sergey Fedorov, 2016/07/15