Summary:
* Investigate Automotive benchmark performance on different branch cost.
Details:
1. Automotive benchmark performance analysis for different branch cost
on Pardaboard ES.
* Design small test cases to simulate bitmnp01 to compare the
performance between ITTT and conditional branch. Test results show
- If branch prediction does not work (put the codes in a
function), ITTT is always better than conditional branch.
- If branch prediction works (inline the codes t in the loop
body), for most cases, conditional branch is better than ITTT.
* Code alignment has big impact for tblook01. By default IT block
has better performance. When adding __attribute__((aligned (16))) for
function t_run_test, performance of conditional branch is better than
IT block.
2. Prepare Linaro toolchain binary release.
* Update Linaro crosstool-ng local patches due to the fix of
lp:1067766 in source package.
* Spawn all builds and smoke tests.
Plan:
* Investigate SPEC2k performance for different branch costs.
* Work with Bero for 2013.01 toolchain binary release .
Planed leaves:
* Feb. 9 - 15: Chinese Spring Festival.
Best Regards!
-Zhenqiang
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