gistfile1.txt

#!/usr/bin/env ply
/* -*- mode: c -*- */

kprobe:SyS_read
{
	sizes[arg(2)].count();
	dist.quantize(arg(2));
	sum.count();
}

--

wkz@wkz-box:~/tmp$ sudo ./test.ply 
1 probe active
^Cde-activating probes

sizes:
    8191	       1
    8192	       1
    4096	       2
    8103	       2
    8152	       2
    8160	       2
    7152	       3
    8176	       3
   16384	       7
    8096	      12
     256	      13
    1024	      14
    7176	      33
       2	      41
   32752	      60
    7200	      66
      16	      95
       1	     288
      10	     842
       8	    1240

dist:
[   0,    1]	     288
[   2,    4)	      41
[   8,   16)	    2083
[  16,   32)	      95
[ 256,  512)	      13
[  1k,   2k)	      14
[  4k,   8k)	     126
[  8k,  16k)	       1
[ 16k,  32k)	      67

sum:
	    2725
wkz@wkz-box:~/tmp$