From cfa882572aa35a223df6a3356120f6e3e104292d Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Sun, 23 Apr 2006 08:39:07 +0000
Subject: [PATCH] * select.cc (thread_pipe): Raise sleep time
dynamically to speed up select on pipes when copying lots of data.
(thread_mailslot): Ditto for mailslots.
---
winsup/cygwin/ChangeLog | 7 +++++++
winsup/cygwin/select.cc | 10 ++++++++--
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 3fd8a78ba..f68265562 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,10 @@
+2006-04-23 Corinna Vinschen <corinna@vinschen.de>
+ Christopher Faylor <cgf@timesys.com>
+
+ * select.cc (thread_pipe): Raise sleep time dynamically to speed up
+ select on pipes when copying lots of data.
+ (thread_mailslot): Ditto for mailslots.
+
2006-04-22 Christopher Faylor <cgf@timesys.com>
* signal.cc (abort): On second thought, just set incyg once.
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index 073e8bcad..970e529f6 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -622,6 +622,7 @@ thread_pipe (void *arg)
{
pipeinf *pi = (pipeinf *) arg;
bool gotone = false;
+ DWORD sleep_time = 0;
for (;;)
{
@@ -645,7 +646,9 @@ thread_pipe (void *arg)
}
if (gotone)
break;
- Sleep (10);
+ Sleep (sleep_time >> 1);
+ if (sleep_time < 20)
+ ++sleep_time;
}
out:
return 0;
@@ -1634,6 +1637,7 @@ thread_mailslot (void *arg)
{
mailslotinf *mi = (mailslotinf *) arg;
bool gotone = false;
+ DWORD sleep_time = 0;
for (;;)
{
@@ -1657,7 +1661,9 @@ thread_mailslot (void *arg)
}
if (gotone)
break;
- Sleep (10);
+ Sleep (sleep_time >> 1);
+ if (sleep_time < 20)
+ ++sleep_time;
}
out:
return 0;