diff options
| author | George V. Neville-Neil <gnn@FreeBSD.org> | 2012-05-12 20:38:18 +0000 |
|---|---|---|
| committer | George V. Neville-Neil <gnn@FreeBSD.org> | 2012-05-12 20:38:18 +0000 |
| commit | 055173dba4a263acf10325a49eebf82915369ed2 (patch) | |
| tree | aec2772e8855e6dbaea6d8136ed0c47bcb825dee /Examples/writedist_example.txt | |
| parent | 87c8f7aa3a46118212b99f0d58b18aa93c06b02a (diff) | |
Notes
Diffstat (limited to 'Examples/writedist_example.txt')
| -rw-r--r-- | Examples/writedist_example.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Examples/writedist_example.txt b/Examples/writedist_example.txt new file mode 100644 index 000000000000..f334843e2c10 --- /dev/null +++ b/Examples/writedist_example.txt @@ -0,0 +1,38 @@ +The following is an example of the writedist.d script, + + +Here the writedist.d script is run for a few seconds, then Ctrl-C is hit, + + # writedist.d + dtrace: description 'sysinfo:::writech ' matched 4 probes + ^C + [...] + Xorg + value ------------- Distribution ------------- count + 16 | 0 + 32 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 169 + 64 |@@@ 16 + 128 |@@ 10 + 256 | 0 + + gnome-terminal + value ------------- Distribution ------------- count + 0 | 0 + 1 |@@ 6 + 2 | 0 + 4 | 0 + 8 | 1 + 16 |@ 2 + 32 |@@@ 7 + 64 | 0 + 128 |@@@@@@@@@@@@@@@@@@@@@@@ 63 + 256 |@@@@ 10 + 512 | 1 + 1024 |@@@@@ 13 + 2048 |@ 2 + 4096 |@@@ 7 + +This allows us to understand the write behaviour of each process. The +gnome-terminal command has executed 6 writes that returned 0 bytes, through +to 7 writes that were at least 4096 bytes (up to 8192). + |