On Tue, Jul 15, 1997 at 02:56:59AM -0400, Bill Sommerfeld wrote:
> The symptoms you observed are consistent with the X library being put
> into synchronous mode "accidentally", perhaps due to a stray memory
> write somewhere.  This will likely be a pain in the a** to track down.

Hmm, so is this a bug in Applixware or somewhere else?

I ktraced some more.  Now Applix is running quite slow - every oldselect()
call takes around 20...30 ms.  BUT, this time it's clear where that time
is spent - here's a ktrace of the X server:

   203 XF86_SVGA 0.000053 CALL  select(0x3f,0x271614,0,0,0xf7bfd908)
   203 XF86_SVGA 0.000101 RET   select 2
   203 XF86_SVGA 0.000068 CALL  read(0x15,0x7ec008,0x15d8)
   203 XF86_SVGA 0.000134 GIO   fd 21 read 52 bytes
       "J\0     \0\^Z\^A@\^D"\^A@\^D\^B\^B*\^A\^Q\0itsetestaustila, \0T\0\^D\0\
        #\0\0\0\0\0\0\0\0\0@\^D"
   203 XF86_SVGA 0.000047 RET   read 52/0x34
   203 XF86_SVGA 0.000698 CALL  mmap(0,0x22000,0x3,0x1002,0xffffffff,0,0,0)
   203 XF86_SVGA 0.000159 RET   mmap 286355456/0x11117000 
   203 XF86_SVGA 0.007421 CALL  munmap(0x11139000,0x22000)
   203 XF86_SVGA 0.000225 RET   munmap 0
   203 XF86_SVGA 0.000061 CALL  mmap(0,0x22000,0x3,0x1002,0xffffffff,0,0,0)
   203 XF86_SVGA 0.000133 RET   mmap 286494720/0x11139000 
   203 XF86_SVGA 0.007442 CALL  munmap(0x11183000,0x22000)
   203 XF86_SVGA 0.000230 RET   munmap 0
   203 XF86_SVGA 0.000061 CALL  mmap(0,0x22000,0x3,0x1002,0xffffffff,0,0,0)
   203 XF86_SVGA 0.000130 RET   mmap 286797824/0x11183000
   203 XF86_SVGA 0.007411 CALL  munmap(0x111a5000,0x22000)
   203 XF86_SVGA 0.000240 RET   munmap 0
   203 XF86_SVGA 0.000075 CALL  writev(0x15,0xf7bfd930,0x1)
   203 XF86_SVGA 0.000097 GIO   fd 21 wrote 32 bytes
       "\^A\M-9\^A5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\^U\0\0\0\M^Lw5\0"
   203 XF86_SVGA 0.000354 RET   writev 32/0x20

The three munmap() calls take over 20 ms!  Why?  It seems that these calls
are slowing down grtadually.  During the last ktrace of the X server, they
were taking about 2 ms each.

More reports will follow if I discover something new. ;)

  -jm


-- 

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