[OpenIndiana-discuss] Intel Driver causes a lot of syscalls

[raichoo]

  Hi everyone,

I already pasted this in the Illumos Forums but figured that this might 
be a better place.
(I'm new here so you might also direct me to a better ML than this one)

I recently installed OpenIndiana on my Thinkpad x201. Everything works 
fine but Xorg
produces a lot of syscalls (approx. 9000/sec). I dug a little deeper and 
found out that
it's actually the intel driver calling ioctl to commincate with the drm 
driver to do some
compositing stuff.

I tested this under 148 and 151 and the issue is present in both.

Here is some information I have gathered:

root at ayanami:/home/raichoo# mpstat 1
CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
   0  848   0   86   619  200  473    7   28   17    0  3093    4   3   0  93
   1  616   0   83   382  106  504    6   27   17    0  3012    4   2   0  94
   2  359   0   72   384  135  432    6   24   15    0  2168    3   1   0  96
   3  164   0   64   320   69  411    5   20   16    0  2036    2   1   0  96
CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
   0   19   0   42   904  416  581    0   25   30    0   659    0   4   0  96
   1    0   0   12   322   93  491    0   29   31    0   126    2   0   0  98
   2    0   0   72   520  167  778    3   31   34    0 10578    3   3   0  94
   3    0   0   18   394  127  541    4   27   57    0  1115    2   1   0  97
CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
   0    0   0   18   934  421  629    1   11    0    0   640    1   4   0  95
   1    0   0    3   478  205  446    0   15    2    0   290    0   1   0  99
   2    0   0    0   368  112  449    0   14    1    0  8780    4   3   0  93
   3    0   0    9   432   72  702    0   10   16    0  1210    4   1   0  95
CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
   0    0   0   30   787  350  693    0   12    0    0   854    0   4   0  96
   1    0   0   34   420  106  518    3   13    0    0  6578    3   2   0  95
   2    0   0   33   318   94  273    2    8    3    0  2317    1   1   0  98
   3    0   0   24   556  177  798    0   14    5    0  1294    2   2   0  96
CPU minf mjf xcal  intr ithr  csw icsw migr smtx  srw syscl  usr sys  wt idl
   0    0   0   45   840  365  675    2   11    6    0  3868    2   5   0  93
   1    0   0   39   551  146  702    4   22    7    0  6230    4   2   0  94
   2    0   0   30   472  173  443    0   21    1    0   456    1   1   0  98
   3    0   0    6   182   39  150    1   10    2    0   152    0   0   0 100


root at ayanami:/home/raichoo# dtrace -n 'syscall::ioctl:entry/execname == "Xorg"/{@[ustack()] = count();} tick-1s{printa(@); trunc(@);}'

[...]
               libc.so.1`ioctl+0xa
               intel_drv.so`i965_composite+0x4b2
               libexa.so`exaTryDriverCompositeRects+0x605
               libexa.so`exaCompositeRects+0x235
               libexa.so`exaGlyphsToMask+0x2a
               libexa.so`exaGlyphs+0x7d1
               Xorg`damageGlyphs+0x256
               Xorg`ProcRenderCompositeGlyphs+0x529
               Xorg`Dispatch+0x3b4
               Xorg`main+0x673
               Xorg`0x46e2dc
              7229



pci bus 0x0000 cardnum 0x00 function 0x00: vendor 0x8086 device 0x0044
  Intel Corporation Core Processor DRAM Controller

pci bus 0x0000 cardnum 0x02 function 0x00: vendor 0x8086 device 0x0046
  Intel Corporation Core Processor Integrated Graphics Controller

pci bus 0x0000 cardnum 0x16 function 0x00: vendor 0x8086 device 0x3b64
  Intel Corporation 5 Series/3400 Series Chipset HECI Controller

pci bus 0x0000 cardnum 0x16 function 0x03: vendor 0x8086 device 0x3b67
  Intel Corporation 5 Series/3400 Series Chipset KT Controller

pci bus 0x0000 cardnum 0x19 function 0x00: vendor 0x8086 device 0x10ea
  Intel Corporation 82577LM Gigabit Network Connection

pci bus 0x0000 cardnum 0x1a function 0x00: vendor 0x8086 device 0x3b3c
  Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host 
Controller

pci bus 0x0000 cardnum 0x1b function 0x00: vendor 0x8086 device 0x3b56
  Intel Corporation 5 Series/3400 Series Chipset High Definition Audio

pci bus 0x0000 cardnum 0x1c function 0x00: vendor 0x8086 device 0x3b42
  Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1

pci bus 0x0000 cardnum 0x1c function 0x03: vendor 0x8086 device 0x3b48
  Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4

pci bus 0x0000 cardnum 0x1c function 0x04: vendor 0x8086 device 0x3b4a
  Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5

pci bus 0x0000 cardnum 0x1d function 0x00: vendor 0x8086 device 0x3b34
  Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host 
Controller

pci bus 0x0000 cardnum 0x1e function 0x00: vendor 0x8086 device 0x2448
  Intel Corporation 82801 Mobile PCI Bridge

pci bus 0x0000 cardnum 0x1f function 0x00: vendor 0x8086 device 0x3b07
  Intel Corporation Mobile 5 Series Chipset LPC Interface Controller

pci bus 0x0000 cardnum 0x1f function 0x02: vendor 0x8086 device 0x3b2f
  Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller

pci bus 0x0000 cardnum 0x1f function 0x03: vendor 0x8086 device 0x3b30
  Intel Corporation 5 Series/3400 Series Chipset SMBus Controller

pci bus 0x0000 cardnum 0x1f function 0x06: vendor 0x8086 device 0x3b32
  Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem

pci bus 0x0002 cardnum 0x00 function 0x00: vendor 0x8086 device 0x4238
  Intel Corporation WiFi Link 6000 Series


Regards,
raichoo