From: Eric Anholt <eric@anholt.net>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 2/4] Add io_ variants of wait_event() and wait_event_interruptible()
Date: Mon, 1 Nov 2010 13:23:42 -0700 [thread overview]
Message-ID: <1288643024-5706-3-git-send-email-eric@anholt.net> (raw)
In-Reply-To: <1288643024-5706-1-git-send-email-eric@anholt.net>
These tell the scheduler that we're waiting on IO, and still "busy".
Signed-off-by: Eric Anholt <eric@anholt.net>
---
include/linux/wait.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 46 insertions(+), 0 deletions(-)
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 3efc9f3..b299c2b 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -202,6 +202,19 @@ do { \
finish_wait(&wq, &__wait); \
} while (0)
+#define __io_wait_event(wq, condition) \
+do { \
+ DEFINE_WAIT(__wait); \
+ \
+ for (;;) { \
+ prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE); \
+ if (condition) \
+ break; \
+ io_schedule(); \
+ } \
+ finish_wait(&wq, &__wait); \
+} while (0)
+
/**
* wait_event - sleep until a condition gets true
* @wq: the waitqueue to wait on
@@ -221,6 +234,13 @@ do { \
__wait_event(wq, condition); \
} while (0)
+#define io_wait_event(wq, condition) \
+do { \
+ if (condition) \
+ break; \
+ __io_wait_event(wq, condition); \
+} while (0)
+
#define __wait_event_timeout(wq, condition, ret) \
do { \
DEFINE_WAIT(__wait); \
@@ -260,6 +280,24 @@ do { \
__ret; \
})
+#define __io_wait_event_interruptible(wq, condition, ret) \
+do { \
+ DEFINE_WAIT(__wait); \
+ \
+ for (;;) { \
+ prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \
+ if (condition) \
+ break; \
+ if (!signal_pending(current)) { \
+ io_schedule(); \
+ continue; \
+ } \
+ ret = -ERESTARTSYS; \
+ break; \
+ } \
+ finish_wait(&wq, &__wait); \
+} while (0)
+
#define __wait_event_interruptible(wq, condition, ret) \
do { \
DEFINE_WAIT(__wait); \
@@ -301,6 +339,14 @@ do { \
__ret; \
})
+#define io_wait_event_interruptible(wq, condition) \
+({ \
+ int __ret = 0; \
+ if (!(condition)) \
+ __io_wait_event_interruptible(wq, condition, __ret); \
+ __ret; \
+})
+
#define __wait_event_interruptible_timeout(wq, condition, ret) \
do { \
DEFINE_WAIT(__wait); \
--
1.7.2.3
next prev parent reply other threads:[~2010-11-01 20:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-01 20:23 [RFC] Hack to avoid C-state reduction during graphics activity Eric Anholt
2010-11-01 20:23 ` [PATCH 1/4] sched: Export io_schedule_timeout() Eric Anholt
2010-11-01 20:23 ` Eric Anholt [this message]
2010-11-01 20:23 ` [PATCH 3/4] drm/i915: Declare waits on GPU as io waits, to reduce C-state reduction Eric Anholt
2010-11-01 20:23 ` [PATCH 4/4] cpuidle: Hack iowait weighting to avoid C-state reduction for graphics Eric Anholt
2010-11-02 12:20 ` [Intel-gfx] " ykzhao
2010-11-02 15:42 ` Eric Anholt
2010-11-02 20:00 ` [Intel-gfx] " Alexey Fisher
2010-11-02 20:44 ` Chris Wilson
2010-11-01 21:00 ` [RFC] Hack to avoid C-state reduction during graphics activity Andrew Lutomirski
2010-11-01 21:43 ` Eric Anholt
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