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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2017-05-04 17:52:03 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco@gcc.gnu.org> | 2017-05-04 17:52:03 +0000 |
| commit | 3b4c0f7e1e162db6c6ad22a6ffd1fc626fa9eb37 (patch) | |
| tree | b436f596ecfbae19b7a00b5f1931f5c786dcaa8d | |
| parent | 9779b2e87c038303a8f44d3f22672bd1703442fc (diff) | |
| download | gcc-3b4c0f7e1e162db6c6ad22a6ffd1fc626fa9eb37.zip gcc-3b4c0f7e1e162db6c6ad22a6ffd1fc626fa9eb37.tar.gz gcc-3b4c0f7e1e162db6c6ad22a6ffd1fc626fa9eb37.tar.bz2 | |
Many supported cores use the AUTOPREFETCHER_WEAK setting which tries to order...
Many supported cores use the AUTOPREFETCHER_WEAK setting which tries
to order loads and stores to improve streaming performance. Since significant
gains were reported in http://patchwork.ozlabs.org/patch/534469/ it seems
like a good idea to enable this setting too for -mcpu=generic. Since the
weak model only keeps the order if it doesn't make the schedule worse, it
should not impact performance adversely on cores that don't show a gain.
gcc/
* config/aarch64/aarch64.c (generic_tunings): Update prefetch model.
From-SVN: r247610
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 88be3a8..374a338 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2017-05-04 Wilco Dijkstra <wdijkstr@arm.com> + * config/aarch64/aarch64.c (generic_tunings): Update prefetch model. + +2017-05-04 Wilco Dijkstra <wdijkstr@arm.com> + * config/aarch64/aarch64.c (cortexa35_tunings): Set jump alignment to 4. (cortexa53_tunings): Likewise. (cortexa57_tunings): Likewise. diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 6227352..71f9819 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -547,7 +547,7 @@ static const struct tune_params generic_tunings = 2, /* min_div_recip_mul_df. */ 0, /* max_case_values. */ 0, /* cache_line_size. */ - tune_params::AUTOPREFETCHER_OFF, /* autoprefetcher_model. */ + tune_params::AUTOPREFETCHER_WEAK, /* autoprefetcher_model. */ (AARCH64_EXTRA_TUNE_NONE) /* tune_flags. */ }; |