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1 The following is a short sample of output from the fspaging.d script.
2
3
4 fspaging.d traces syscall read and writes, vnode interface reads, writes,
5 getpage and putpage, and disk io.
6
7    # ./fspaging.d
8    Event             Device RW     Size Offset Path
9        disk_io         dad1  R     1024      0 /extra1
10        disk_io         dad1  R     8192      0 <none>
11        disk_io         dad1  R     2048      0 <none>
12    sc-write               .  W    51200      0 /extra1/outfile
13      fop_write            .  W    51200      0 /extra1/outfile
14      fop_getpage          .  R     8192      0 /extra1/50k
15        disk_io         dad1  R     8192      0 /extra1/50k
16        disk_ra         dad1  R     8192      8 /extra1/50k
17      fop_getpage          .  R     8192      8 /extra1/50k
18        disk_ra         dad1  R    34816     16 /extra1/50k
19      fop_getpage          .  R     8192     16 /extra1/50k
20      fop_getpage          .  R     8192     24 /extra1/50k
21      fop_getpage          .  R     8192     32 /extra1/50k
22      fop_getpage          .  R     8192     40 /extra1/50k
23      fop_getpage          .  R     8192     48 /extra1/50k
24      fop_putpage          .  W     8192      0 /extra1/outfile
25      fop_putpage          .  W     8192      8 /extra1/outfile
26      fop_putpage          .  W     8192     16 /extra1/outfile
27      fop_putpage          .  W     8192     24 /extra1/outfile
28      fop_putpage          .  W     8192     32 /extra1/outfile
29      fop_putpage          .  W     8192     40 /extra1/outfile
30        disk_io         dad1  W    51200      0 /extra1/outfile
31
32 For a full discussion of this example, see fsrw_example.txt.