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ANDROID: Sched: Add hooks for scheduler

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Add vendors hooks for to facilitate various scheduler value adds.

Bug: 200103201
Change-Id: I5d488ae78ce05f81e6c73b69c56128b065647fec
Signed-off-by: Shaleen Agrawal <shalagra@codeaurora.org>
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>
This commit is contained in:
Shaleen Agrawal
2020-12-21 16:29:49 -08:00
committed by Todd Kjos
parent c0ba33609e
commit 99545883fb
3 changed files with 38 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/android/vendor_hooks.c
View File

@@ -122,6 +122,10 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_update_cpu_capacity);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_update_misfit_status);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_cpu_cgroup_attach);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_cpu_cgroup_can_attach);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_sched_fork_init);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_ttwu_cond);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_schedule_bug);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_sched_exec);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_map_util_freq);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_em_cpu_energy);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ftrace_oops_enter);

16
include/trace/hooks/sched.h
View File

@@ -198,6 +198,22 @@ DECLARE_RESTRICTED_HOOK(android_rvh_cpu_cgroup_can_attach,
TP_PROTO(struct cgroup_taskset *tset, int *retval),
TP_ARGS(tset, retval), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_sched_fork_init,
TP_PROTO(struct task_struct *p),
TP_ARGS(p), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_ttwu_cond,
TP_PROTO(bool *cond),
TP_ARGS(cond), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_schedule_bug,
TP_PROTO(void *unused),
TP_ARGS(unused), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_sched_exec,
TP_PROTO(bool *cond),
TP_ARGS(cond), 1);
DECLARE_HOOK(android_vh_map_util_freq,
TP_PROTO(unsigned long util, unsigned long freq,
unsigned long cap, unsigned long *next_freq),

19
kernel/sched/core.c
View File

@@ -3775,7 +3775,12 @@ static inline bool ttwu_queue_cond(int cpu, int wake_flags)
static bool ttwu_queue_wakelist(struct task_struct *p, int cpu, int wake_flags)
{
if (sched_feat(TTWU_QUEUE) && ttwu_queue_cond(cpu, wake_flags)) {
bool cond = false;
trace_android_rvh_ttwu_cond(&cond);
if ((sched_feat(TTWU_QUEUE) && ttwu_queue_cond(cpu, wake_flags)) ||
cond) {
if (WARN_ON_ONCE(cpu == smp_processor_id()))
return false;
@@ -4233,6 +4238,8 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
p->se.cfs_rq = NULL;
#endif
trace_android_rvh_sched_fork_init(p);
#ifdef CONFIG_SCHEDSTATS
/* Even if schedstat is disabled, there should not be garbage */
memset(&p->se.statistics, 0, sizeof(p->se.statistics));
@@ -5099,6 +5106,11 @@ void sched_exec(void)
struct task_struct *p = current;
unsigned long flags;
int dest_cpu;
bool cond = false;
trace_android_rvh_sched_exec(&cond);
if (cond)
return;
raw_spin_lock_irqsave(&p->pi_lock, flags);
dest_cpu = p->sched_class->select_task_rq(p, task_cpu(p), WF_EXEC);
@@ -5530,6 +5542,8 @@ static noinline void __schedule_bug(struct task_struct *prev)
if (panic_on_warn)
panic("scheduling while atomic\n");
trace_android_rvh_schedule_bug(prev);
dump_stack();
add_taint(TAINT_WARN, LOCKDEP_STILL_OK);
}
@@ -9586,6 +9600,9 @@ void ___might_sleep(const char *file, int line, int preempt_offset)
pr_err("Preemption disabled at:");
print_ip_sym(KERN_ERR, preempt_disable_ip);
}
trace_android_rvh_schedule_bug(NULL);
dump_stack();
add_taint(TAINT_WARN, LOCKDEP_STILL_OK);
}