Documentation/fb/cyblafb/performance

   1 Speed
   2 =====
   3
   4 CyBlaFB is much faster than tridentfb and vesafb. Compare the performance data
   5 for mode 1280x1024-[8,16,32]@61 Hz.
   6
   7 Test 1: Cat a file with 2000 lines of 0 characters.
   8 Test 2: Cat a file with 2000 lines of 80 characters.
   9 Test 3: Cat a file with 2000 lines of 160 characters.
  10
  11 All values show system time use in seconds, kernel 2.6.12 was used for
  12 the measurements. 2.6.13 is a bit slower, 2.6.14 hopefully will include a
  13 patch that speeds up kernel bitblitting a lot ( > 20%).
  14
  15 +-----------+-----------------------------------------------------+
  16 |           |                   not accelerated                   |
  17 | TRIDENTFB +-----------------+-----------------+-----------------+
  18 | of 2.6.12 |      8 bpp      |     16 bpp      |     32 bpp      |
  19 |           | noypan |   ypan | noypan |   ypan | noypan |   ypan |
  20 +-----------+--------+--------+--------+--------+--------+--------+
  21 |    Test 1 |   4.31 |   4.33 |   6.05 |  12.81 |  ----  |  ----  |
  22 |    Test 2 |  67.94 |   5.44 | 123.16 |  14.79 |  ----  |  ----  |
  23 |    Test 3 | 131.36 |   6.55 | 240.12 |  16.76 |  ----  |  ----  |
  24 +-----------+--------+--------+--------+--------+--------+--------+
  25 |  Comments |                 |                 | completely bro- |
  26 |           |                 |                 | ken, monitor    |
  27 |           |                 |                 | switches off    |
  28 +-----------+-----------------+-----------------+-----------------+
  29
  30
  31 +-----------+-----------------------------------------------------+
  32 |           |                     accelerated                     |
  33 | TRIDENTFB +-----------------+-----------------+-----------------+
  34 | of 2.6.12 |      8 bpp      |     16 bpp      |     32 bpp      |
  35 |           | noypan |   ypan | noypan |   ypan | noypan |   ypan |
  36 +-----------+--------+--------+--------+--------+--------+--------+
  37 |    Test 1 |  ----  |  ----  |  20.62 |   1.22 |  ----  |  ----  |
  38 |    Test 2 |  ----  |  ----  |  22.61 |   3.19 |  ----  |  ----  |
  39 |    Test 3 |  ----  |  ----  |  24.59 |   5.16 |  ----  |  ----  |
  40 +-----------+--------+--------+--------+--------+--------+--------+
  41 |  Comments | broken, writing | broken, ok only | completely bro- |
  42 |           | to wrong places | if bgcolor is   | ken, monitor    |
  43 |           | on screen + bug | black, bug in   | switches off    |
  44 |           | in fillrect()   | fillrect()      |                 |
  45 +-----------+-----------------+-----------------+-----------------+
  46
  47
  48 +-----------+-----------------------------------------------------+
  49 |           |                   not accelerated                   |
  50 |   VESAFB  +-----------------+-----------------+-----------------+
  51 | of 2.6.12 |      8 bpp      |     16 bpp      |     32 bpp      |
  52 |           | noypan |   ypan | noypan |   ypan | noypan |   ypan |
  53 +-----------+--------+--------+--------+--------+--------+--------+
  54 |    Test 1 |   4.26 |   3.76 |   5.99 |   7.23 |  ----  |  ----  |
  55 |    Test 2 |  65.65 |   4.89 | 120.88 |   9.08 |  ----  |  ----  |
  56 |    Test 3 | 126.91 |   5.94 | 235.77 |  11.03 |  ----  |  ----  |
  57 +-----------+--------+--------+--------+--------+--------+--------+
  58 |  Comments | vga=0x307       | vga=0x31a       | vga=0x31b not   |
  59 |           | fh=80kHz        | fh=80kHz        | supported by    |
  60 |           | fv=75kHz        | fv=75kHz        | video BIOS and  |
  61 |           |                 |                 | hardware        |
  62 +-----------+-----------------+-----------------+-----------------+
  63
  64
  65 +-----------+-----------------------------------------------------+
  66 |           |                     accelerated                     |
  67 |  CYBLAFB  +-----------------+-----------------+-----------------+
  68 |           |      8 bpp      |     16 bpp      |     32 bpp      |
  69 |           | noypan |   ypan | noypan |   ypan | noypan |   ypan |
  70 +-----------+--------+--------+--------+--------+--------+--------+
  71 |    Test 1 |   8.02 |   0.23 |  19.04 |   0.61 |  57.12 |   2.74 |
  72 |    Test 2 |   8.38 |   0.55 |  19.39 |   0.92 |  57.54 |   3.13 |
  73 |    Test 3 |   8.73 |   0.86 |  19.74 |   1.24 |  57.95 |   3.51 |
  74 +-----------+--------+--------+--------+--------+--------+--------+
  75 |  Comments |                 |                 |                 |
  76 |           |                 |                 |                 |
  77 |           |                 |                 |                 |
  78 |           |                 |                 |                 |
  79 +-----------+-----------------+-----------------+-----------------+