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Add Kconfig support to select the number of low-priority worker thread

This commit is contained in:
Gregory Nutt 2014-10-10 16:38:19 -06:00
parent e01c31517c
commit 743abd7155
1 changed files with 15 additions and 0 deletions
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libc/Kconfig
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@ -471,6 +471,21 @@ config SCHED_LPWORK
if SCHED_LPWORK
config SCHED_LPNTHREADS
int "Number of low-priority worker threads"
default 1 if !FS_AIO
default 4 if FS_AIO
---help---
This options selectes multiple, low-priority threads. This is
essentially a "thread pool" that provides multi-threaded service
of the low-priority work thread. This breaks the serialization
of the "queue" (hence, it is no longer a queue at all).
This options is required to support, for example, I/O operations
that stall waiting for input. If there is only a single thread,
then the entire low-priority queue processing stalls in such cases.
Such behvior must be support for asynchronous I/O, AIO (for example).
config SCHED_LPWORKPRIORITY
int "Low priority worker thread priority"
default 50