sched: Add function single_task_running to let a task check if it is the only task...
authorTim Chen <tim.c.chen@linux.intel.com>
Thu, 31 Jul 2014 17:29:48 +0000 (10:29 -0700)
committerHerbert Xu <herbert@gondor.apana.org.au>
Mon, 25 Aug 2014 12:32:23 +0000 (20:32 +0800)
commit2ee507c472939db4b146d545352b8a7c79ef47f8
treed7c7034b23517f10340a8622cd9e9921d5f0b196
parentbbb9a7dd7fd1ec076b034e6f5bce3fb5a215f050
sched: Add function single_task_running to let a task check if it is the only task running on a cpu

This function will help an async task processing batched jobs from
workqueue decide if it wants to keep processing on more chunks of batched
work that can be delayed, or to accumulate more work for more efficient
batched processing later.

If no other tasks are running on the cpu, the batching process can take
advantgae of the available cpu cycles to a make decision to continue
processing the existing accumulated work to minimize delay,
otherwise it will yield.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
include/linux/sched.h
kernel/sched/core.c