On 11/12/2012 01:27 PM, Evgeny Voevodin wrote:
This set of patches moves global variables to tcg_ctx:
gen_opc_ptr
gen_opparam_ptr
gen_opc_buf
gen_opparam_buf
Build tested for all targets.
Execution tested on Exynos4210 target.
After this patchset was aplied, I noticed 0.7% speed-up of code generation.
Probably, this is due to better data caching.
Here is the test procedure:
1. Boot Linux Kernel 5 times.
2. For each iteration wait while "JIT cycles" is stable for ~10 seconds
3. Write down the "cycles/op"
Here are the results (tested on gcc-4.6):
Before clean-up:
min: 731.5
max: 734.8
avg: 733.0
standard deviation: ~2 ~= 0.2%
Average cycles/op = 733 +- 2
After clean-up:
min: 725.0
max: 730.5
avg: 727.8
standard deviation: ~3 ~= 0.4%
Average cycles/op = 728 +- 3
Speed-up of TCG code generation = 0.7%
Changelog:
v5->v6:
Fixed broken patches.
Rebased.
v4->v5:
Rebased.
Fixed authorship.
All patches are reviewed-by Richard Henderson <r...@twiddle.net>
v3->v4:
Rebased.
Added target-cris/translate.c: Code style clean-up
v2->v3:
Removed tcg_cur_ctx since it gives slow-down on gcc-4.5.
Rebased.
v1->v2:
Introduced TCGContext *tcg_cur_ctx global to use in those places where we don't
have an interface to pass pointer to tcg_ctx.
Code style clean-up
Evgeny Voevodin (7):
target-cris/translate.c: Code style clean-up
tcg/tcg.h: Duplicate global TCG variables in TCGContext
TCG: Use gen_opc_ptr from context instead of global variable.
TCG: Use gen_opparam_ptr from context instead of global variable.
TCG: Use gen_opc_buf from context instead of global variable.
TCG: Use gen_opparam_buf from context instead of global variable.
TCG: Remove unused global variables
gen-icount.h | 2 +-
target-alpha/translate.c | 10 +-
target-arm/translate.c | 10 +-
target-cris/translate.c | 5040 +++++++++++++++++++++--------------------
target-i386/translate.c | 10 +-
target-lm32/translate.c | 13 +-
target-m68k/translate.c | 10 +-
target-microblaze/translate.c | 13 +-
target-mips/translate.c | 11 +-
target-openrisc/translate.c | 13 +-
target-ppc/translate.c | 11 +-
target-s390x/translate.c | 11 +-
target-sh4/translate.c | 10 +-
target-sparc/translate.c | 10 +-
target-unicore32/translate.c | 10 +-
target-xtensa/translate.c | 8 +-
tcg/optimize.c | 62 +-
tcg/tcg-op.h | 324 +--
tcg/tcg.c | 85 +-
tcg/tcg.h | 10 +-
translate-all.c | 3 -
21 files changed, 2859 insertions(+), 2817 deletions(-)
Ping?
--
Kind regards,
Evgeny Voevodin,
Technical Leader,
Mobile Group,
Samsung Moscow Research Center,
e-mail: e.voevo...@samsung.com