diff options
Diffstat (limited to 'nx-X11/programs/Xserver/hw/dmx/dmxsync.c')
| -rw-r--r-- | nx-X11/programs/Xserver/hw/dmx/dmxsync.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/nx-X11/programs/Xserver/hw/dmx/dmxsync.c b/nx-X11/programs/Xserver/hw/dmx/dmxsync.c deleted file mode 100644 index 02e244697..000000000 --- a/nx-X11/programs/Xserver/hw/dmx/dmxsync.c +++ /dev/null @@ -1,194 +0,0 @@ -/* $XFree86$ */ -/* - * Copyright 2002-2004 Red Hat Inc., Durham, North Carolina. - * - * All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation on the rights to use, copy, modify, merge, - * publish, distribute, sublicense, and/or sell copies of the Software, - * and to permit persons to whom the Software is furnished to do so, - * subject to the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial - * portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -/* - * Authors: - * Rickard E. (Rik) Faith <faith@redhat.com> - * - */ - -/** \file - * - * The DMX server code is written to call #dmxSync() whenever an XSync() - * might be necessary. However, since XSync() requires a two way - * communication with the other X server, eliminating unnecessary - * XSync() calls is a key performance optimization. Support for this - * optimization is provided here. Statistics about XSync() calls and - * latency are gathered in #dmxstat.c. - * - * During the initial conversion from calling XSync() immediately to the - * XSync() batching method implemented in this file, it was noted that, - * out of more than 300 \a x11perf tests, 8 tests became more than 100 - * times faster, with 68 more than 50X faster, 114 more than 10X faster, - * and 181 more than 2X faster. */ - -#ifdef HAVE_DMX_CONFIG_H -#include <dmx-config.h> -#endif - -#include "dmx.h" -#include "dmxsync.h" -#include "dmxstat.h" -#include "dmxlog.h" -#include <sys/time.h> - -static int dmxSyncInterval = 100; /* Default interval in milliseconds */ -static OsTimerPtr dmxSyncTimer; -static int dmxSyncPending; - -static void dmxDoSync(DMXScreenInfo *dmxScreen) -{ - dmxScreen->needsSync = FALSE; - - if (!dmxScreen->beDisplay) - return; /* FIXME: Is this correct behavior for sync stats? */ - - if (!dmxStatInterval) { - XSync(dmxScreen->beDisplay, False); - } else { - struct timeval start, stop; - - gettimeofday(&start, 0); - XSync(dmxScreen->beDisplay, False); - gettimeofday(&stop, 0); - dmxStatSync(dmxScreen, &stop, &start, dmxSyncPending); - } -} - -static CARD32 dmxSyncCallback(OsTimerPtr timer, CARD32 time, pointer arg) -{ - int i; - - if (dmxSyncPending) { - for (i = 0; i < dmxNumScreens; i++) { - DMXScreenInfo *dmxScreen = &dmxScreens[i]; - if (dmxScreen->needsSync) dmxDoSync(dmxScreen); - } - } - dmxSyncPending = 0; - return 0; /* Do not place on queue again */ -} - -static void dmxSyncBlockHandler(pointer blockData, OSTimePtr pTimeout, - pointer pReadMask) -{ - TimerForce(dmxSyncTimer); -} - -static void dmxSyncWakeupHandler(pointer blockData, int result, - pointer pReadMask) -{ -} - -/** Request the XSync() batching optimization with the specified \a - * interval (in mS). If the \a interval is 0, 100mS is used. If the \a - * interval is less than 0, then the XSync() batching optimization is - * not requested (e.g., so the -syncbatch -1 command line option can - * turn off the default 100mS XSync() batching). - * - * Note that the parameter to this routine is a string, since it will - * usually be called from #ddxProcessArgument in #dmxinit.c */ -void dmxSyncActivate(const char *interval) -{ - dmxSyncInterval = (interval ? atoi(interval) : 100); - - if (dmxSyncInterval < 0) dmxSyncInterval = 0; -} - -/** Initialize the XSync() batching optimization, but only if - * #dmxSyncActivate was last called with a non-negative value. */ -void dmxSyncInit(void) -{ - if (dmxSyncInterval) { - RegisterBlockAndWakeupHandlers(dmxSyncBlockHandler, - dmxSyncWakeupHandler, - NULL); - dmxLog(dmxInfo, "XSync batching with %d ms interval\n", - dmxSyncInterval); - } else { - dmxLog(dmxInfo, "XSync batching disabled\n"); - } -} - -/** Request an XSync() to the display used by \a dmxScreen. If \a now - * is TRUE, call XSync() immediately instead of waiting for the next - * XSync() batching point. Note that if XSync() batching was deselected - * with #dmxSyncActivate() before #dmxSyncInit() was called, then no - * XSync() batching is performed and this function always calles XSync() - * immediately. - * - * (Note that this function uses TimerSet but works correctly in the - * face of a server generation. See the source for details.) - * - * If \a dmxScreen is \a NULL, then all pending syncs will be flushed - * immediately. - */ -void dmxSync(DMXScreenInfo *dmxScreen, Bool now) -{ - static unsigned long dmxGeneration = 0; - - if (dmxSyncInterval) { - if (dmxGeneration != serverGeneration) { - /* Server generation does a TimerInit, which frees all - * timers. So, at this point dmxSyncTimer is either: - * 1) NULL, iff dmxGeneration == 0, - * 2) freed, if it was on a queue (dmxSyncPending != 0), or - * 3) allocated, if it wasn't on a queue (dmxSyncPending == 0) - */ - if (dmxSyncTimer && !dmxSyncPending) xfree(dmxSyncTimer); - dmxSyncTimer = NULL; - now = TRUE; - dmxGeneration = serverGeneration; - } - /* Queue sync */ - if (dmxScreen) { - dmxScreen->needsSync = TRUE; - ++dmxSyncPending; - } - - /* Do sync or set time for later */ - if (now || !dmxScreen) { - if (!TimerForce(dmxSyncTimer)) dmxSyncCallback(NULL, 0, NULL); - /* At this point, dmxSyncPending == 0 because - * dmxSyncCallback must have been called. */ - if (dmxSyncPending) - dmxLog(dmxFatal, "dmxSync(%s,%d): dmxSyncPending = %d\n", - dmxScreen ? dmxScreen->name : "", now, dmxSyncPending); - } else { - dmxScreen->needsSync = TRUE; - if (dmxSyncPending == 1) - dmxSyncTimer = TimerSet(dmxSyncTimer, 0, dmxSyncInterval, - dmxSyncCallback, NULL); - } - } else { - /* If dmxSyncInterval is not being used, - * then all the backends are already - * up-to-date. */ - if (dmxScreen) dmxDoSync(dmxScreen); - } -} |