doc/sps.shtml

   1 <HTML>
   2 <HEAD>
   3         <META NAME="COPYRIGHT" CONTENT="Copyright 1997-2003, All Rights Reserved">
   4         <META NAME="DOCNUMBER" CONTENT="CUPS-SPS-1.2">
   5         <META NAME="Author" CONTENT="Easy Software Products">
   6         <TITLE>CUPS Software Performance Specification</TITLE>
   7 </HEAD>
   8 <BODY>
   9
  10 <H1>Scope</H1>
  11
  12 <H2>Identification</H2>
  13
  14 <P>This software performance specification provides an analysis of the
  15 memory, disk, and processor utilitization of each program in the
  16 Common UNIX Printing System ("CUPS") Version 1.2.</P>
  17
  18 <P>For the purposes of comparison, all figures are for the Linux Intel
  19 platform. Memory utilization on other platforms should be similar.
  20
  21 <EMBED SRC="system-overview.shtml">
  22
  23 <H2>Document Overview</H2>
  24
  25 <P>This software performance specification is organized into the
  26 following sections:</P>
  27
  28 <UL>
  29         <LI>1 - Scope</LI>
  30         <LI>2 - References</LI>
  31         <LI>3 - Programs</LI>
  32         <LI>4 - Scheduler Objects</LI>
  33         <LI>A - Glossary</LI>
  34 </UL>
  35
  36 <EMBED SRC="references.shtml">
  37
  38 <H1>Programs</H1>
  39
  40 <P>The following table describes the average memory, disk, and CPU usage of
  41 each program in CUPS.
  42
  43 <P>The base memory column shows the initial memory requirements for each
  44 program, including any shared libraries that are provided by CUPS.
  45
  46 <P>The max memory column shows the maximum amount of memory that will be
  47 used by the program based upon the default configuration settings supplied
  48 with CUPS.
  49
  50 <P>The temp files column indicates whether any temporary files are created.
  51
  52 <P>The CPU usage column specifies a relative CPU usage by the program under
  53 normal conditions, either low, medium, or high.  Low usage indicates that
  54 the program will never use more than 33% of the available CPU time. Medium
  55 usage indicates the program will use as much as 66% of the available CPU
  56 time. High usage indicates the program uses 66% or more of the available CPU
  57 time.
  58
  59 <CENTER><TABLE WIDTH="80%" BORDER="1">
  60 <TR>
  61         <TH COLSPAN="3">Backends</TH>
  62 </TR>
  63 <TR>
  64         <TH>Program</TH>
  65         <TH>Base Memory</TH>
  66         <TH>Max Memory</TH>
  67         <TH>Temp Files</TH>
  68         <TH>CPU Usage</TH>
  69 </TR>
  70 <TR>
  71         <TD>ipp</TD>
  72         <TD>91k</TD>
  73         <TD>256k</TD>
  74         <TD>Up to size of print file</TD>
  75         <TD>Low</TD>
  76 </TR>
  77 <TR>
  78         <TD>lpd</TD>
  79         <TD>89k</TD>
  80         <TD>89k</TD>
  81         <TD>Up to size of print file</TD>
  82         <TD>Low</TD>
  83 </TR>
  84 <TR>
  85         <TD>parallel</TD>
  86         <TD>85k</TD>
  87         <TD>85k</TD>
  88         <TD>Up to size of print file</TD>
  89         <TD>Low</TD>
  90 </TR>
  91 <TR>
  92         <TD>serial</TD>
  93         <TD>85k</TD>
  94         <TD>85k</TD>
  95         <TD>Up to size of print file</TD>
  96         <TD>Low</TD>
  97 </TR>
  98 <TR>
  99         <TD>socket</TD>
 100         <TD>85k</TD>
 101         <TD>85k</TD>
 102         <TD>Up to size of print file</TD>
 103         <TD>Low</TD>
 104 </TR>
 105 <TR>
 106         <TD>usb</TD>
 107         <TD>85k</TD>
 108         <TD>85k</TD>
 109         <TD>Up to size of print file</TD>
 110         <TD>Low</TD>
 111 </TR>
 112 <TR>
 113         <TH COLSPAN="3">CGIs</TH>
 114 </TR>
 115 <TR>
 116         <TH>Program</TH>
 117         <TH>Base Memory</TH>
 118         <TH>Max Memory</TH>
 119         <TH>Temp Files</TH>
 120         <TH>CPU Usage</TH>
 121 </TR>
 122 <TR>
 123         <TD>admin.cgi</TD>
 124         <TD>107k</TD>
 125         <TD>256k</TD>
 126         <TD>Up to size of PPD file</TD>
 127         <TD>Medium</TD>
 128 </TR>
 129 <TR>
 130         <TD>classes.cgi</TD>
 131         <TD>95k</TD>
 132         <TD>Size of class objects</TD>
 133         <TD>None</TD>
 134         <TD>Medium</TD>
 135 </TR>
 136 <TR>
 137         <TD>jobs.cgi</TD>
 138         <TD>93k</TD>
 139         <TD>Size of job objects</TD>
 140         <TD>None</TD>
 141         <TD>Medium</TD>
 142 </TR>
 143 <TR>
 144         <TD>printers.cgi</TD>
 145         <TD>95k</TD>
 146         <TD>Size of printer objects</TD>
 147         <TD>None</TD>
 148         <TD>Medium</TD>
 149 </TR>
 150 <TR>
 151         <TH COLSPAN="3">Command-Line Programs</TH>
 152 </TR>
 153 <TR>
 154         <TH>Program</TH>
 155         <TH>Base Memory</TH>
 156         <TH>Max Memory</TH>
 157         <TH>Temp Files</TH>
 158         <TH>CPU Usage</TH>
 159 </TR>
 160 <TR>
 161         <TD>accept</TD>
 162         <TD>88k</TD>
 163         <TD>128k</TD>
 164         <TD>None</TD>
 165         <TD>Low</TD>
 166 </TR>
 167 <TR>
 168         <TD>cancel</TD>
 169         <TD>88k</TD>
 170         <TD>128k</TD>
 171         <TD>None</TD>
 172         <TD>Low</TD>
 173 </TR>
 174 <TR>
 175         <TD>disable</TD>
 176         <TD>88k</TD>
 177         <TD>128k</TD>
 178         <TD>None</TD>
 179         <TD>Low</TD>
 180 </TR>
 181 <TR>
 182         <TD>enable</TD>
 183         <TD>88k</TD>
 184         <TD>128k</TD>
 185         <TD>None</TD>
 186         <TD>Low</TD>
 187 </TR>
 188 <TR>
 189         <TD>lp</TD>
 190         <TD>90k</TD>
 191         <TD>256k</TD>
 192         <TD>None</TD>
 193         <TD>Low</TD>
 194 </TR>
 195 <TR>
 196         <TD>lpadmin</TD>
 197         <TD>148k</TD>
 198         <TD>256k</TD>
 199         <TD>None</TD>
 200         <TD>Low</TD>
 201 </TR>
 202 <TR>
 203         <TD>lpc</TD>
 204         <TD>86k</TD>
 205         <TD>Size of job and printer objects</TD>
 206         <TD>None</TD>
 207         <TD>Medium</TD>
 208 </TR>
 209 <TR>
 210         <TD>lpinfo</TD>
 211         <TD>89k</TD>
 212         <TD>Size of device and PPD objects</TD>
 213         <TD>None</TD>
 214         <TD>Medium</TD>
 215 </TR>
 216 <TR>
 217         <TD>lpmove</TD>
 218         <TD>88k</TD>
 219         <TD>128k</TD>
 220         <TD>None</TD>
 221         <TD>Low</TD>
 222 </TR>
 223 <TR>
 224         <TD>lpoptions</TD>
 225         <TD>89k</TD>
 226         <TD>128k</TD>
 227         <TD>None</TD>
 228         <TD>Low</TD>
 229 </TR>
 230 <TR>
 231         <TD>lppasswd</TD>
 232         <TD>90k</TD>
 233         <TD>90k</TD>
 234         <TD>None</TD>
 235         <TD>Low</TD>
 236 </TR>
 237 <TR>
 238         <TD>lpq</TD>
 239         <TD>87k</TD>
 240         <TD>Size of job objects</TD>
 241         <TD>None</TD>
 242         <TD>Medium</TD>
 243 </TR>
 244 <TR>
 245         <TD>lpr</TD>
 246         <TD>87k</TD>
 247         <TD>256k</TD>
 248         <TD>None</TD>
 249         <TD>Low</TD>
 250 </TR>
 251 <TR>
 252         <TD>lprm</TD>
 253         <TD>84k</TD>
 254         <TD>128k</TD>
 255         <TD>None</TD>
 256         <TD>Low</TD>
 257 </TR>
 258 <TR>
 259         <TD>lpstat</TD>
 260         <TD>119k</TD>
 261         <TD>Size of job, printer, and class objects</TD>
 262         <TD>None</TD>
 263         <TD>Medium</TD>
 264 </TR>
 265 <TR>
 266         <TD>reject</TD>
 267         <TD>88k</TD>
 268         <TD>128k</TD>
 269         <TD>None</TD>
 270         <TD>Low</TD>
 271 </TR>
 272 <TR>
 273         <TH COLSPAN="3">Daemons</TH>
 274 </TR>
 275 <TR>
 276         <TH>Program</TH>
 277         <TH>Base Memory</TH>
 278         <TH>Max Memory</TH>
 279         <TH>Temp Files</TH>
 280         <TH>CPU Usage</TH>
 281 </TR>
 282 <TR>
 283         <TD>cups-lpd</TD>
 284         <TD>92k</TD>
 285         <TD>256k</TD>
 286         <TD>One file per control or data file from client</TD>
 287         <TD>Low</TD>
 288 </TR>
 289 <TR>
 290         <TD>cupsd</TD>
 291         <TD>308k</TD>
 292         <TD>See Scheduler Requirements</TD>
 293         <TD>See Scheduler Requirements</TD>
 294         <TD>Medium</TD>
 295 </TR>
 296 <TR>
 297         <TD>cups-polld</TD>
 298         <TD>84k</TD>
 299         <TD>Size of printer and class objects</TD>
 300         <TD>None</TD>
 301         <TD>Low</TD>
 302 </TR>
 303 <TR>
 304         <TH COLSPAN="3">Filters</TH>
 305 </TR>
 306 <TR>
 307         <TH>Program</TH>
 308         <TH>Base Memory</TH>
 309         <TH>Max Memory</TH>
 310         <TH>Temp Files</TH>
 311         <TH>CPU Usage</TH>
 312 </TR>
 313 <TR>
 314         <TD>hpgltops</TD>
 315         <TD>263k</TD>
 316         <TD>320k</TD>
 317         <TD>None</TD>
 318         <TD>Medium</TD>
 319 </TR>
 320 <TR>
 321         <TD>imagetops</TD>
 322         <TD>628k</TD>
 323         <TD>10M</TD>
 324         <TD>Swap file for uncompressed image data</TD>
 325         <TD>Medium</TD>
 326 </TR>
 327 <TR>
 328         <TD>imagetoraster</TD>
 329         <TD>652k</TD>
 330         <TD>10M</TD>
 331         <TD>Swap file for uncompressed image data</TD>
 332         <TD>High</TD>
 333 </TR>
 334 <TR>
 335         <TD>pstops</TD>
 336         <TD>775k</TD>
 337         <TD>840k</TD>
 338         <TD>Up to size of print file</TD>
 339         <TD>Medium</TD>
 340 </TR>
 341 <TR>
 342         <TD>pstoraster</TD>
 343         <TD>4M</TD>
 344         <TD>14M</TD>
 345         <TD>Swap file for command lists</TD>
 346         <TD>High</TD>
 347 </TR>
 348 <TR>
 349         <TD>rastertoepson</TD>
 350         <TD>693k</TD>
 351         <TD>1M</TD>
 352         <TD>None</TD>
 353         <TD>Low</TD>
 354 </TR>
 355 <TR>
 356         <TD>rastertohp</TD>
 357         <TD>690k</TD>
 358         <TD>1M</TD>
 359         <TD>None</TD>
 360         <TD>Low</TD>
 361 </TR>
 362 <TR>
 363         <TD>texttops</TD>
 364         <TD>638k</TD>
 365         <TD>4*cols*rows</TD>
 366         <TD>None</TD>
 367         <TD>Low</TD>
 368 </TR>
 369 </TABLE></CENTER>
 370
 371
 372 <H1>Scheduler Objects</H1>
 373
 374 <P>The <CODE>cupsd</CODE> program is the CUPS scheduler process. It manages
 375 many interdependent server objects that are used to manage and print files
 376 to printers.
 377
 378 <P>The following table provides the memory and disk cost associated with each
 379 server object.
 380
 381 <CENTER><TABLE WIDTH="80%" BORDER="1">
 382 <TR>
 383         <TH>Object</TH>
 384         <TH>Memory Per</TH>
 385         <TH>Disk Per</TH>
 386 </TR>
 387 <TR>
 388         <TD>Browse ACL</TD>
 389         <TD>1k</TD>
 390         <TD>120</TD>
 391 </TR>
 392 <TR>
 393         <TD>Browse Poll</TD>
 394         <TD>24</TD>
 395         <TD>80</TD>
 396 </TR>
 397 <TR>
 398         <TD>Browse Relay</TD>
 399         <TD>28</TD>
 400         <TD>80</TD>
 401 </TR>
 402 <TR>
 403         <TD>Certificate</TD>
 404         <TD>76</TD>
 405         <TD>32</TD>
 406 </TR>
 407 <TR>
 408         <TD>Class</TD>
 409         <TD>9k</TD>
 410         <TD>200</TD>
 411 </TR>
 412 <TR>
 413         <TD>Client</TD>
 414         <TD>13k</TD>
 415         <TD>-</TD>
 416 </TR>
 417 <TR>
 418         <TD>Device</TD>
 419         <TD>256</TD>
 420         <TD>-</TD>
 421 </TR>
 422 <TR>
 423         <TD>Job</TD>
 424         <TD>2k</TD>
 425         <TD>1k + size of document files</TD>
 426 </TR>
 427 <TR>
 428         <TD>Location ACL</TD>
 429         <TD>1k</TD>
 430         <TD>120</TD>
 431 </TR>
 432 <TR>
 433         <TD>MIME Filter</TD>
 434         <TD>268</TD>
 435         <TD>80</TD>
 436 </TR>
 437 <TR>
 438         <TD>MIME Type</TD>
 439         <TD>340</TD>
 440         <TD>80</TD>
 441 </TR>
 442 <TR>
 443         <TD>PPD</TD>
 444         <TD>200</TD>
 445         <TD>656</TD>
 446 </TR>
 447 <TR>
 448         <TD>Printer</TD>
 449         <TD>11k</TD>
 450         <TD>32k</TD>
 451 </TR>
 452 </TABLE></CENTER>
 453
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