diff options
Diffstat (limited to 'nx-X11/programs/Xserver/hw/dmx/dmxstat.c')
| -rw-r--r-- | nx-X11/programs/Xserver/hw/dmx/dmxstat.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/nx-X11/programs/Xserver/hw/dmx/dmxstat.c b/nx-X11/programs/Xserver/hw/dmx/dmxstat.c deleted file mode 100644 index 3b092b2a8..000000000 --- a/nx-X11/programs/Xserver/hw/dmx/dmxstat.c +++ /dev/null @@ -1,223 +0,0 @@ -/* $XFree86$ */ -/* - * Copyright 2002, 2003 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 in #dmxsync.c. This file provides routines - * that evaluate this optimization by counting the number of XSync() - * calls and monitoring their latency. This functionality can be turned - * on using the -stat command-line parameter. */ - -#ifdef HAVE_DMX_CONFIG_H -#include <dmx-config.h> -#endif - -#include "dmx.h" -#include "dmxstat.h" -#include "dmxlog.h" -#include <X11/Xos.h> /* For sys/time.h */ - -/** Used to compute a running average of value. */ -typedef struct _DMXStatAvg { - int pos; - int count; - unsigned long value[DMX_STAT_LENGTH]; -} DMXStatAvg; - -/** Statistical information about XSync calls. */ -struct _DMXStatInfo { - unsigned long syncCount; - unsigned long oldSyncCount; - - DMXStatAvg usec; - DMXStatAvg pending; - - unsigned long bins[DMX_STAT_BINS]; -}; - -/* Interval in mS between statistic message log entries. */ - int dmxStatInterval; -static int dmxStatDisplays; -static OsTimerPtr dmxStatTimer; - -/** Return the number of microseconds as an unsigned long. - * Unfortunately, this is only useful for intervals < about 4 sec. */ -static unsigned long usec(struct timeval *stop, struct timeval *start) -{ - return (stop->tv_sec - start->tv_sec) * 1000000 - + stop->tv_usec - start->tv_usec; -} - -static unsigned long avg(DMXStatAvg *data, unsigned long *max) -{ - unsigned long sum; - int i; - - *max = 0; - if (!data->count) return 0; - - for (i = 0, sum = 0; i < data->count; i++) { - if (data->value[i] > *max) *max = data->value[i]; - sum += data->value[i]; - } - return sum / data->count; -} - -/** Turn on XSync statistic gathering and printing. Print every \a - * interval seconds, with lines for the first \a displays. If \a - * interval is NULL, 1 will be used. If \a displays is NULL, 0 will be - * used (meaning a line for every display will be printed). Note that - * this function takes string arguments because it will usually be - * called from #ddxProcessArgument in #dmxinit.c. */ -void dmxStatActivate(const char *interval, const char *displays) -{ - dmxStatInterval = (interval ? atoi(interval) : 1) * 1000; - dmxStatDisplays = (displays ? atoi(displays) : 0); - - if (dmxStatInterval < 1000) dmxStatInterval = 1000; - if (dmxStatDisplays < 0) dmxStatDisplays = 0; -} - -/** Allocate a \a DMXStatInfo structure. */ -DMXStatInfo *dmxStatAlloc(void) -{ - DMXStatInfo *pt = malloc(sizeof(*pt)); - memset(pt, 0, sizeof(*pt)); - return pt; -} - -/** Free the memory used by a \a DMXStatInfo structure. */ -void dmxStatFree(DMXStatInfo *pt) -{ - if (pt) free(pt); -} - -static void dmxStatValue(DMXStatAvg *data, unsigned long value) -{ - if (data->count != DMX_STAT_LENGTH) ++data->count; - if (data->pos >= DMX_STAT_LENGTH-1) data->pos = 0; - data->value[data->pos++] = value; -} - -/** Note that a XSync() was just done on \a dmxScreen with the \a start - * and \a stop times (from gettimeofday()) and the number of - * pending-but-not-yet-processed XSync requests. This routine is called - * from #dmxDoSync in #dmxsync.c */ -void dmxStatSync(DMXScreenInfo *dmxScreen, - struct timeval *stop, struct timeval *start, - unsigned long pending) -{ - DMXStatInfo *s = dmxScreen->stat; - unsigned long elapsed = usec(stop, start); - unsigned long thresh; - int i; - - ++s->syncCount; - dmxStatValue(&s->usec, elapsed); - dmxStatValue(&s->pending, pending); - - for (i = 0, thresh = DMX_STAT_BIN0; i < DMX_STAT_BINS-1; i++) { - if (elapsed < thresh) { - ++s->bins[i]; - break; - } - thresh *= DMX_STAT_BINMULT; - } - if (i == DMX_STAT_BINS-1) ++s->bins[i]; -} - -/* Actually do the work of printing out the human-readable message. */ -static CARD32 dmxStatCallback(OsTimerPtr timer, CARD32 t, pointer arg) -{ - int i, j; - static int header = 0; - int limit = dmxNumScreens; - - if (!dmxNumScreens) { - header = 0; - return DMX_STAT_INTERVAL; - } - - if (!header++ || !(header % 10)) { - dmxLog(dmxDebug, - " S SyncCount Sync/s avSync mxSync avPend mxPend | " - "<10ms <1s >1s\n"); - } - - if (dmxStatDisplays && dmxStatDisplays < limit) limit = dmxStatDisplays; - for (i = 0; i < limit; i++) { - DMXScreenInfo *dmxScreen = &dmxScreens[i]; - DMXStatInfo *s = dmxScreen->stat; - unsigned long aSync, mSync; - unsigned long aPend, mPend; - - if (!s) continue; - - aSync = avg(&s->usec, &mSync); - aPend = avg(&s->pending, &mPend); - dmxLog(dmxDebug, "%2d %9lu %7lu %6lu %6lu %6lu %6lu |", - i, /* S */ - s->syncCount, /* SyncCount */ - (s->syncCount - - s->oldSyncCount) * 1000 / dmxStatInterval, /* Sync/s */ - aSync, /* us/Sync */ - mSync, /* max/Sync */ - aPend, /* avgPend */ - mPend); /* maxPend */ - for (j = 0; j < DMX_STAT_BINS; j++) - dmxLogCont(dmxDebug, " %5lu", s->bins[j]); - dmxLogCont(dmxDebug, "\n"); - - /* Reset/clear */ - s->oldSyncCount = s->syncCount; - for (j = 0; j < DMX_STAT_BINS; j++) s->bins[j] = 0; - } - return DMX_STAT_INTERVAL; /* Place on queue again */ -} - -/** Try to initialize the statistic gathering and printing routines. - * Initialization only takes place if #dmxStatActivate has already been - * called. We don't need the same generation protection that we used in - * dmxSyncInit because our timer is always on a queue -- hence, server - * generation will always free it. */ -void dmxStatInit(void) -{ - if (dmxStatInterval) - dmxStatTimer = TimerSet(NULL, 0, - dmxStatInterval, dmxStatCallback, NULL); -} |