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ANDROID: add for tuning readahead size

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Tune ReadAhead size for better memory usage and performance.
accordding to Read-Ahead Efficiency on Mobile Devices: Observation,
Characterization, and Optimization form IEEE

Bug: 229839032
Bug: 395197442
Change-Id: I91656bde5e616e181fd7557554d55e7ce1858136
Signed-off-by: liang zhang <liang.zhang@transsion.com>
Signed-off-by: Oven <liyangouwen1@oppo.com>
Signed-off-by: huzhanyuan  <huzhanyuan@oppo.com>
Signed-off-by: wengle <wengle@oppo.com>
This commit is contained in:
liang zhang
2022-04-21 09:43:37 +00:00
committed by Carlos Llamas
parent 21c64f5a21
commit b6f24657f2
3 changed files with 7 additions and 0 deletions
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drivers/android/vendor_hooks.c
+1
View File
@@ -174,6 +174,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_kvmalloc_node_use_vmalloc);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_should_alloc_pages_retry);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_unreserve_highatomic_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rmqueue_bulk_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ra_tuning_max_page);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_hw_protection_shutdown);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_shrink_slab_bypass);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_drain_all_pages_bypass);
include/trace/hooks/mm.h
+3
View File
@@ -177,6 +177,9 @@ DECLARE_HOOK(android_vh_process_madvise,
DECLARE_HOOK(android_vh_count_workingset_refault,
TP_PROTO(struct folio *folio),
TP_ARGS(folio));
DECLARE_HOOK(android_vh_ra_tuning_max_page,
TP_PROTO(struct readahead_control *ractl, unsigned long *max_page),
TP_ARGS(ractl, max_page));
DECLARE_HOOK(android_vh_calc_alloc_flags,
TP_PROTO(gfp_t gfp_mask, unsigned int *alloc_flags,
bool *bypass),
mm/readahead.c
+3
View File
@@ -533,6 +533,9 @@ static unsigned long ractl_max_pages(struct readahead_control *ractl,
*/
if (req_size > max_pages && bdi->io_pages > max_pages)
max_pages = min(req_size, bdi->io_pages);
trace_android_vh_ra_tuning_max_page(ractl, &max_pages);
return max_pages;
}