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authorMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-02 15:02:49 +0100
committerMike Gabriel <mike.gabriel@das-netzwerkteam.de>2015-02-02 15:02:49 +0100
commitb16b9e4656e7199c2aec74a4c8ebc7a875d3ba73 (patch)
tree4361edef0d42d5bf5ac984ef72b4fac35426eae7 /nx-X11/programs/Xserver/hw/dmx/dmxstat.c
parent0d5a83e986f39982c0924652a3662e60b1f23162 (diff)
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massive reduction of unneeded files
Diffstat (limited to 'nx-X11/programs/Xserver/hw/dmx/dmxstat.c')
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diff --git a/nx-X11/programs/Xserver/hw/dmx/dmxstat.c b/nx-X11/programs/Xserver/hw/dmx/dmxstat.c
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-/* $XFree86$ */
-/*
- * 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);
-}