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sched: walt: remove vendor hook "trace_binder_transaction_received"

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"trace_binder_transaction_received" vendor hook is used to clear binder low
latency MVP priority, but for some usecase it is observed that usespace
application is initiating read ioctl quickly and as part of ioctl handling
binder driver initiates transaction received vendor hook and binder low
latency MVP priority is cleared for the binder thread.
Handle above condition by allowing binder thread to maintain and run with
MVP priority for it's allocated MVP timeslice.

The Low latency flag of the task is reset only when the binder transactions
is initiated again on the same thread and task initiating the transaction
doesn't comply with the low latency criterion.

Change-Id: Ie068adc64796432b7d41b0256a25a04caac518b1
Signed-off-by: Ashay Jaiswal <quic_ashayj@quicinc.com>
This commit is contained in:
Ashay Jaiswal 2022-08-19 23:36:50 +05:30 committed by Sai Harshini Nimmala
parent c9410f348b
commit 92c1eb4e2f
1 changed files with 11 additions and 10 deletions
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21
kernel/sched/walt/walt_cfs.c
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@ -992,16 +992,18 @@ static void walt_binder_low_latency_set(void *unused, struct task_struct *task,
(current->group_leader->prio < MAX_RT_PRIO &&
task_in_related_thread_group(task))))
wts->low_latency |= WALT_LOW_LATENCY_BINDER;
}
static void walt_binder_low_latency_clear(void *unused, struct binder_transaction *t)
{
struct walt_task_struct *wts = (struct walt_task_struct *) current->android_vendor_data1;
if (unlikely(walt_disabled))
return;
if (wts->low_latency & WALT_LOW_LATENCY_BINDER)
else
/*
* Clear low_latency flag if criterion above is not met, this
* will handle usecase where for a binder thread WALT_LOW_LATENCY_BINDER
* is set by one task and before WALT clears this flag after timer expiry
* some other task tries to use same binder thread.
*
* The only gets cleared when binder transaction is initiated
* and the above condition to set flasg is nto satisfied.
*/
wts->low_latency &= ~WALT_LOW_LATENCY_BINDER;
}
static void binder_set_priority_hook(void *data,
@ -1364,7 +1366,6 @@ void walt_cfs_init(void)
register_trace_android_rvh_select_task_rq_fair(walt_select_task_rq_fair, NULL);
register_trace_android_vh_binder_wakeup_ilocked(walt_binder_low_latency_set, NULL);
register_trace_binder_transaction_received(walt_binder_low_latency_clear, NULL);
register_trace_android_vh_binder_set_priority(binder_set_priority_hook, NULL);
register_trace_android_vh_binder_restore_priority(binder_restore_priority_hook, NULL);