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726 lines
15 KiB
726 lines
15 KiB
/*
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Copyright (C) 2002-2009 Karl J. Runge <runge@karlrunge.com>
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All rights reserved.
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This file is part of x11vnc.
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x11vnc is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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x11vnc is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with x11vnc; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
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or see <http://www.gnu.org/licenses/>.
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In addition, as a special exception, Karl J. Runge
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gives permission to link the code of its release of x11vnc with the
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OpenSSL project's "OpenSSL" library (or with modified versions of it
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that use the same license as the "OpenSSL" library), and distribute
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the linked executables. You must obey the GNU General Public License
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in all respects for all of the code used other than "OpenSSL". If you
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modify this file, you may extend this exception to your version of the
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file, but you are not obligated to do so. If you do not wish to do
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so, delete this exception statement from your version.
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*/
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/* -- rates.c -- */
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#include "x11vnc.h"
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#include "xwrappers.h"
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#include "scan.h"
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int measure_speeds = 1;
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int speeds_net_rate = 0;
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int speeds_net_rate_measured = 0;
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int speeds_net_latency = 0;
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int speeds_net_latency_measured = 0;
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int speeds_read_rate = 0;
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int speeds_read_rate_measured = 0;
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int get_cmp_rate(void);
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int get_raw_rate(void);
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void initialize_speeds(void);
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int get_read_rate(void);
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int link_rate(int *latency, int *netrate);
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int get_net_rate(void);
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int get_net_latency(void);
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void measure_send_rates(int init);
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static void measure_display_hook(rfbClientPtr cl);
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static int get_rate(int which);
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static int get_latency(void);
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static void measure_display_hook(rfbClientPtr cl) {
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ClientData *cd = (ClientData *) cl->clientData;
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if (! cd) {
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return;
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}
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dtime0(&cd->timer);
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}
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static int get_rate(int which) {
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rfbClientIteratorPtr iter;
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rfbClientPtr cl;
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int irate, irate_min = 1; /* 1 KB/sec */
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int irate_max = 100000; /* 100 MB/sec */
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int count = 0;
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double slowest = -1.0, rate;
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static double save_rate = 1000 * NETRATE0;
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if (!screen) {
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return 0;
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}
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iter = rfbGetClientIterator(screen);
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while( (cl = rfbClientIteratorNext(iter)) ) {
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ClientData *cd = (ClientData *) cl->clientData;
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if (! cd) {
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continue;
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}
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if (cl->state != RFB_NORMAL) {
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continue;
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}
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if (cd->send_cmp_rate == 0.0 || cd->send_raw_rate == 0.0) {
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continue;
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}
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count++;
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if (which == 0) {
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rate = cd->send_cmp_rate;
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} else {
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rate = cd->send_raw_rate;
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}
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if (slowest == -1.0 || rate < slowest) {
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slowest = rate;
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}
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}
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rfbReleaseClientIterator(iter);
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if (! count) {
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return NETRATE0;
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}
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if (slowest == -1.0) {
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slowest = save_rate;
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} else {
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save_rate = slowest;
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}
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irate = (int) (slowest/1000.0);
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if (irate < irate_min) {
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irate = irate_min;
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}
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if (irate > irate_max) {
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irate = irate_max;
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}
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if (0) fprintf(stderr, "get_rate(%d) %d %.3f/%.3f\n", which, irate, save_rate, slowest);
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return irate;
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}
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static int get_latency(void) {
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rfbClientIteratorPtr iter;
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rfbClientPtr cl;
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int ilat, ilat_min = 1; /* 1 ms */
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int ilat_max = 2000; /* 2 sec */
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double slowest = -1.0, lat;
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static double save_lat = ((double) LATENCY0)/1000.0;
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int count = 0;
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if (!screen) {
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return 0;
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}
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iter = rfbGetClientIterator(screen);
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while( (cl = rfbClientIteratorNext(iter)) ) {
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ClientData *cd = (ClientData *) cl->clientData;
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if (! cd) {
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continue;
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}
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if (cl->state != RFB_NORMAL) {
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continue;
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}
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if (cd->latency == 0.0) {
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continue;
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}
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count++;
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lat = cd->latency;
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if (slowest == -1.0 || lat > slowest) {
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slowest = lat;
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}
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}
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rfbReleaseClientIterator(iter);
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if (! count) {
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return LATENCY0;
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}
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if (slowest == -1.0) {
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slowest = save_lat;
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} else {
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save_lat = slowest;
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}
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ilat = (int) (slowest * 1000.0);
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if (ilat < ilat_min) {
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ilat = ilat_min;
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}
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if (ilat > ilat_max) {
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ilat = ilat_max;
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}
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return ilat;
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}
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int get_cmp_rate(void) {
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return get_rate(0);
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}
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int get_raw_rate(void) {
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return get_rate(1);
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}
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void initialize_speeds(void) {
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char *s, *s_in, *p;
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int i;
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speeds_read_rate = 0;
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speeds_net_rate = 0;
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speeds_net_latency = 0;
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if (! speeds_str || *speeds_str == '\0') {
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s_in = strdup("");
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} else {
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s_in = strdup(speeds_str);
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}
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if (!strcmp(s_in, "modem")) {
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s = strdup("6,4,200");
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} else if (!strcmp(s_in, "dsl")) {
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s = strdup("6,100,50");
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} else if (!strcmp(s_in, "lan")) {
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s = strdup("6,5000,1");
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} else {
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s = strdup(s_in);
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}
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p = strtok(s, ",");
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i = 0;
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while (p) {
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double val;
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if (*p != '\0') {
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val = atof(p);
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if (i==0) {
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speeds_read_rate = (int) 1000000 * val;
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} else if (i==1) {
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speeds_net_rate = (int) 1000 * val;
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} else if (i==2) {
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speeds_net_latency = (int) val;
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}
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}
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i++;
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p = strtok(NULL, ",");
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}
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free(s);
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free(s_in);
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if (! speeds_read_rate) {
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int n = 0;
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double dt, timer;
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dtime0(&timer);
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if (fullscreen) {
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copy_image(fullscreen, 0, 0, 0, 0);
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n = fullscreen->bytes_per_line * fullscreen->height;
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} else if (scanline) {
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copy_image(scanline, 0, 0, 0, 0);
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n = scanline->bytes_per_line * scanline->height;
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}
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dt = dtime(&timer);
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if (n && dt > 0.0) {
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double rate = ((double) n) / dt;
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speeds_read_rate_measured = (int) (rate/1000000.0);
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if (speeds_read_rate_measured < 1) {
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speeds_read_rate_measured = 1;
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} else {
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rfbLog("fb read rate: %d MB/sec\n",
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speeds_read_rate_measured);
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}
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}
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}
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}
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int get_read_rate(void) {
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if (speeds_read_rate) {
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return speeds_read_rate;
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}
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if (speeds_read_rate_measured) {
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return speeds_read_rate_measured;
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}
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return 0;
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}
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int link_rate(int *latency, int *netrate) {
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*latency = get_net_latency();
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*netrate = get_net_rate();
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if (speeds_str) {
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if (!strcmp(speeds_str, "modem")) {
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return LR_DIALUP;
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} else if (!strcmp(speeds_str, "dsl")) {
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return LR_BROADBAND;
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} else if (!strcmp(speeds_str, "lan")) {
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return LR_LAN;
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}
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}
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if (*latency == LATENCY0 && *netrate == NETRATE0) {
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return LR_UNSET;
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} else if (*latency > 150 || *netrate < 20) {
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return LR_DIALUP;
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} else if (*latency > 50 || *netrate < 150) {
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return LR_BROADBAND;
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} else if (*latency < 10 && *netrate > 300) {
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return LR_LAN;
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} else {
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return LR_UNKNOWN;
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}
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}
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int get_net_rate(void) {
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int spm = speeds_net_rate_measured;
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if (speeds_net_rate) {
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return speeds_net_rate;
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}
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if (! spm || spm == NETRATE0) {
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speeds_net_rate_measured = get_cmp_rate();
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}
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if (speeds_net_rate_measured) {
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return speeds_net_rate_measured;
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}
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return 0;
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}
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int get_net_latency(void) {
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int spm = speeds_net_latency_measured;
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if (speeds_net_latency) {
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return speeds_net_latency;
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}
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if (! spm || spm == LATENCY0) {
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speeds_net_latency_measured = get_latency();
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}
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if (speeds_net_latency_measured) {
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return speeds_net_latency_measured;
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}
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return 0;
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}
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void measure_send_rates(int init) {
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double cmp_rate, raw_rate;
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static double now, start = 0.0;
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static rfbDisplayHookPtr orig_display_hook = NULL;
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double cmp_max = 1.0e+08; /* 100 MB/sec */
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double cmp_min = 1000.0; /* 9600baud */
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double lat_max = 5.0; /* 5 sec */
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double lat_min = .0005; /* 0.5 ms */
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int min_cmp = 10000, nclients;
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rfbClientIteratorPtr iter;
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rfbClientPtr cl0, cl;
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int msg = 0, clcnt0 = 0, cc;
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int db = 0, ouch_db = 0, ouch = 0;
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if (! measure_speeds) {
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return;
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}
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if (speeds_net_rate && speeds_net_latency) {
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return;
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}
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if (!client_count) {
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return;
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}
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if (! orig_display_hook) {
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orig_display_hook = screen->displayHook;
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}
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if (start == 0.0) {
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dtime(&start);
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}
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dtime0(&now);
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if (now < last_client_gone+4.0) {
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return;
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}
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now = now - start;
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nclients = 0;
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if (!screen) {
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return;
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}
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cl0 = NULL;
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iter = rfbGetClientIterator(screen);
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while( (cl = rfbClientIteratorNext(iter)) ) {
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ClientData *cd = (ClientData *) cl->clientData;
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if (! cd) {
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continue;
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}
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if (cd->send_cmp_rate > 0.0) {
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continue;
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}
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if (cl->onHold) {
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continue;
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}
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nclients++;
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if (cl0 == NULL) {
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cl0 = cl;
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}
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}
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rfbReleaseClientIterator(iter);
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cl = cl0;
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cc = 0;
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while (cl != NULL && cc++ == 0) {
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int defer, i, cbs, rbs;
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char *httpdir;
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double dt, dt1 = 0.0, dt2, dt3;
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double tm, spin_max = 15.0, spin_lat_max = 1.5;
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int got_t2 = 0, got_t3 = 0;
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ClientData *cd = (ClientData *) cl->clientData;
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#if 0
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for (i=0; i<MAX_ENCODINGS; i++) {
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cbs += cl->bytesSent[i];
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}
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rbs = cl->rawBytesEquivalent;
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#else
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#if LIBVNCSERVER_HAS_STATS
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cbs = rfbStatGetSentBytes(cl);
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rbs = rfbStatGetSentBytesIfRaw(cl);
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#endif
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#endif
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if (init) {
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if (db) fprintf(stderr, "%d client num rects req: %d mod: %d cbs: %d "
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"rbs: %d dt1: %.3f t: %.3f\n", init,
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(int) sraRgnCountRects(cl->requestedRegion),
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(int) sraRgnCountRects(cl->modifiedRegion), cbs, rbs, dt1, now);
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cd->timer = dnow();
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cd->cmp_bytes_sent = cbs;
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cd->raw_bytes_sent = rbs;
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continue;
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}
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/* first part of the bulk transfer of initial screen */
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dt1 = dtime(&cd->timer);
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if (db) fprintf(stderr, "%d client num rects req: %d mod: %d cbs: %d "
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"rbs: %d dt1: %.3f t: %.3f\n", init,
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(int) sraRgnCountRects(cl->requestedRegion),
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(int) sraRgnCountRects(cl->modifiedRegion), cbs, rbs, dt1, now);
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if (dt1 <= 0.0) {
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continue;
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}
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cbs = cbs - cd->cmp_bytes_sent;
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rbs = rbs - cd->raw_bytes_sent;
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if (cbs < min_cmp) {
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continue;
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}
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if (ouch_db) fprintf(stderr, "START-OUCH: %d\n", client_count);
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clcnt0 = client_count;
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#define OUCH ( ouch || (ouch = (!client_count || client_count != clcnt0 || dnow() < last_client_gone+4.0)) )
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rfbPE(1000);
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if (OUCH && ouch_db) fprintf(stderr, "***OUCH-A\n");
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if (OUCH) continue;
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if (use_threads) LOCK(cl->updateMutex);
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if (sraRgnCountRects(cl->modifiedRegion)) {
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rfbPE(1000);
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if (OUCH && ouch_db) fprintf(stderr, "***OUCH-B\n");
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if (use_threads) UNLOCK(cl->updateMutex);
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if (OUCH) continue;
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}
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if (use_threads) UNLOCK(cl->updateMutex);
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defer = screen->deferUpdateTime;
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httpdir = screen->httpDir;
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screen->deferUpdateTime = 0;
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screen->httpDir = NULL;
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/* mark a small rectangle: */
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mark_rect_as_modified(0, 0, 16, 16, 1);
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dtime0(&tm);
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dt2 = 0.0;
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dt3 = 0.0;
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if (dt1 < 0.25) {
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/* try to cut it down to avoid long pauses. */
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spin_max = 5.0;
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}
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/* when req1 = 1 mod1 == 0, end of 2nd part of bulk transfer */
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while (1) {
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int req0, req1, mod0, mod1;
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if (OUCH && ouch_db) fprintf(stderr, "***OUCH-C1\n");
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if (OUCH) break;
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if (use_threads) LOCK(cl->updateMutex);
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req0 = sraRgnCountRects(cl->requestedRegion);
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mod0 = sraRgnCountRects(cl->modifiedRegion);
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if (use_threads) UNLOCK(cl->updateMutex);
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if (use_threads) {
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usleep(1000);
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} else {
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if (mod0) {
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rfbPE(1000);
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} else {
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rfbCFD(1000);
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}
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}
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dt = dtime(&tm);
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dt2 += dt;
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if (dt2 > spin_max) {
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break;
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}
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if (OUCH && ouch_db) fprintf(stderr, "***OUCH-C2\n");
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if (OUCH) break;
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if (use_threads) LOCK(cl->updateMutex);
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req1 = sraRgnCountRects(cl->requestedRegion);
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mod1 = sraRgnCountRects(cl->modifiedRegion);
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if (use_threads) UNLOCK(cl->updateMutex);
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if (db) fprintf(stderr, "dt2 calc: num rects req: %d/%d mod: %d/%d "
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"fbu-sent: %d dt: %.4f dt2: %.4f tm: %.4f\n",
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req0, req1, mod0, mod1,
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#if 0
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cl->framebufferUpdateMessagesSent,
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#else
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#if LIBVNCSERVER_HAS_STATS
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rfbStatGetMessageCountSent(cl, rfbFramebufferUpdate),
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#endif
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#endif
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dt, dt2, tm);
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if (req1 != 0 && mod1 == 0) {
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got_t2 = 1;
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break;
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}
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}
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if (OUCH && ouch_db) fprintf(stderr, "***OUCH-D\n");
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|
if (OUCH) goto ouch;
|
|
|
|
if (! got_t2) {
|
|
dt2 = 0.0;
|
|
} else {
|
|
int tr, trm = 3;
|
|
double dts[10];
|
|
|
|
/*
|
|
* Note: since often select(2) cannot sleep
|
|
* less than 1/HZ (e.g. 10ms), the resolution
|
|
* of the latency may be messed up by something
|
|
* of this order. Effect may occur on both ends,
|
|
* i.e. the viewer may not respond immediately.
|
|
*/
|
|
|
|
for (tr = 0; tr < trm; tr++) {
|
|
usleep(5000);
|
|
|
|
/* mark a 2nd small rectangle: */
|
|
mark_rect_as_modified(0, 0, 16, 16, 1);
|
|
i = 0;
|
|
dtime0(&tm);
|
|
dt3 = 0.0;
|
|
|
|
/*
|
|
* when req1 > 0 and mod1 == 0, we say
|
|
* that is the "ping" time.
|
|
*/
|
|
while (1) {
|
|
int req0, req1, mod0, mod1;
|
|
|
|
if (use_threads) LOCK(cl->updateMutex);
|
|
|
|
req0 = sraRgnCountRects(cl->requestedRegion);
|
|
mod0 = sraRgnCountRects(cl->modifiedRegion);
|
|
|
|
if (use_threads) UNLOCK(cl->updateMutex);
|
|
|
|
if (i == 0) {
|
|
rfbPE(0);
|
|
} else {
|
|
if (use_threads) {
|
|
usleep(1000);
|
|
} else {
|
|
/* try to get it all */
|
|
rfbCFD(1000*1000);
|
|
}
|
|
}
|
|
if (OUCH && ouch_db) fprintf(stderr, "***OUCH-E\n");
|
|
if (OUCH) goto ouch;
|
|
dt = dtime(&tm);
|
|
i++;
|
|
|
|
dt3 += dt;
|
|
if (dt3 > spin_lat_max) {
|
|
break;
|
|
}
|
|
|
|
if (use_threads) LOCK(cl->updateMutex);
|
|
|
|
req1 = sraRgnCountRects(cl->requestedRegion);
|
|
mod1 = sraRgnCountRects(cl->modifiedRegion);
|
|
|
|
if (use_threads) UNLOCK(cl->updateMutex);
|
|
|
|
if (db) fprintf(stderr, "dt3 calc: num rects req: %d/%d mod: %d/%d "
|
|
"fbu-sent: %d dt: %.4f dt3: %.4f tm: %.4f\n",
|
|
req0, req1, mod0, mod1,
|
|
#if 0
|
|
cl->framebufferUpdateMessagesSent,
|
|
#else
|
|
#if LIBVNCSERVER_HAS_STATS
|
|
rfbStatGetMessageCountSent(cl, rfbFramebufferUpdate),
|
|
#endif
|
|
#endif
|
|
dt, dt3, tm);
|
|
|
|
if (req1 != 0 && mod1 == 0) {
|
|
dts[got_t3++] = dt3;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (! got_t3) {
|
|
dt3 = 0.0;
|
|
} else {
|
|
if (got_t3 == 1) {
|
|
dt3 = dts[0];
|
|
} else if (got_t3 == 2) {
|
|
dt3 = dts[1];
|
|
} else {
|
|
if (dts[2] > 0.0) {
|
|
double rat = dts[1]/dts[2];
|
|
if (rat > 0.5 && rat < 2.0) {
|
|
dt3 = dts[1]+dts[2];
|
|
dt3 *= 0.5;
|
|
} else {
|
|
dt3 = dts[1];
|
|
}
|
|
} else {
|
|
dt3 = dts[1];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ouch:
|
|
|
|
screen->deferUpdateTime = defer;
|
|
screen->httpDir = httpdir;
|
|
|
|
if (OUCH && ouch_db) fprintf(stderr, "***OUCH-F\n");
|
|
if (OUCH) break;
|
|
|
|
dt = dt1 + dt2;
|
|
|
|
|
|
if (dt3 <= dt2/2.0) {
|
|
/* guess only 1/2 a ping for reply... */
|
|
dt = dt - dt3/2.0;
|
|
}
|
|
|
|
cmp_rate = cbs/dt;
|
|
raw_rate = rbs/dt;
|
|
|
|
if (cmp_rate > cmp_max) {
|
|
cmp_rate = cmp_max;
|
|
}
|
|
if (cmp_rate <= cmp_min) {
|
|
cmp_rate = cmp_min;
|
|
}
|
|
|
|
cd->send_cmp_rate = cmp_rate;
|
|
cd->send_raw_rate = raw_rate;
|
|
|
|
if (dt3 > lat_max) {
|
|
dt3 = lat_max;
|
|
}
|
|
if (dt3 <= lat_min) {
|
|
dt3 = lat_min;
|
|
}
|
|
|
|
cd->latency = dt3;
|
|
|
|
rfbLog("client %d network rate %.1f KB/sec (%.1f eff KB/sec)\n",
|
|
cd->uid, cmp_rate/1000.0, raw_rate/1000.0);
|
|
rfbLog("client %d latency: %.1f ms\n", cd->uid, 1000.0*dt3);
|
|
rfbLog("dt1: %.4f, dt2: %.4f dt3: %.4f bytes: %d\n",
|
|
dt1, dt2, dt3, cbs);
|
|
msg = 1;
|
|
}
|
|
|
|
if (msg) {
|
|
int link, latency, netrate;
|
|
char *str = "error";
|
|
|
|
link = link_rate(&latency, &netrate);
|
|
if (link == LR_UNSET) {
|
|
str = "LR_UNSET";
|
|
} else if (link == LR_UNKNOWN) {
|
|
str = "LR_UNKNOWN";
|
|
} else if (link == LR_DIALUP) {
|
|
str = "LR_DIALUP";
|
|
} else if (link == LR_BROADBAND) {
|
|
str = "LR_BROADBAND";
|
|
} else if (link == LR_LAN) {
|
|
str = "LR_LAN";
|
|
}
|
|
rfbLog("link_rate: %s - %d ms, %d KB/s\n", str, latency,
|
|
netrate);
|
|
}
|
|
|
|
if (init) {
|
|
if (nclients) {
|
|
screen->displayHook = measure_display_hook;
|
|
}
|
|
} else {
|
|
screen->displayHook = orig_display_hook;
|
|
}
|
|
}
|
|
|