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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
Change-Id: I91656bde5e616e181fd7557554d55e7ce1858136
Signed-off-by: liang zhang <liang.zhang@transsion.com>
Signed-off-by: Oven <liyangouwen1@oppo.com>
This commit is contained in:
liang zhang 2022-04-21 09:43:37 +00:00 • committed by Suren Baghdasaryan
parent a8206e3023
commit 0c859c2180
3 changed files with 6 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/android/vendor_hooks.c
View file

@ -176,6 +176,7 @@ 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_selinux_avc_insert);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_selinux_avc_node_delete);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_selinux_avc_node_replace);

3
include/trace/hooks/mm.h
View file

@ -141,6 +141,9 @@ DECLARE_HOOK(android_vh_rmqueue_bulk_bypass,
TP_PROTO(unsigned int order, struct per_cpu_pages *pcp, int migratetype,
struct list_head *list),
TP_ARGS(order, pcp, migratetype, list));
DECLARE_HOOK(android_vh_ra_tuning_max_page,
TP_PROTO(struct readahead_control *ractl, unsigned long *max_page),
TP_ARGS(ractl, max_page));
struct mem_cgroup;
DECLARE_HOOK(android_vh_mem_cgroup_alloc,
TP_PROTO(struct mem_cgroup *memcg),

2
mm/readahead.c
View file

@ -591,6 +591,8 @@ static void ondemand_readahead(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);
/*
* start of file
*/