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ANDROID: sched/walt: make walt_ktime_suspended __read_mostly

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Most walt variables in hot code paths are __read_mostly and grouped
together in the .data section, including these variables that show
up as frequently accessed in gem5 simulation: walt_ravg_window,
walt_disabled, walt_account_wait_time, and
walt_freq_account_wait_time.

The exception is walt_ktime_suspended, which is also accessed in many
of the same hot paths.  It is also almost entirely accessed by reads.
Move it to __read_mostly in hopes of keeping it in the same cache line
as the other hot data.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2017-04-10 18:31:28 -07:00
parent 5b10152c52
commit 932dceef4c
1 changed files with 1 additions and 1 deletions
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kernel/sched/walt.c
+1 -1
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@@ -81,7 +81,7 @@ __read_mostly unsigned int walt_ravg_window = 20000000;
static unsigned int sync_cpu;
static ktime_t ktime_last;
static bool walt_ktime_suspended;
static __read_mostly bool walt_ktime_suspended;
static unsigned int task_load(struct task_struct *p)
{