I recently converted my home directory to zfs on an external disk drive.
Approximately every three seconds I can hear the disk being accessed,
even if I'm doing nothing. The noise is driving me crazy!
I tried using dtrace to find out what process might be accessing the
disk. I used the iosnoop
Interesting problem. I've used disk rattle as a measurement of io
activity before
there were such tools for measurement. It's crude, but effective.
To answer your question: you could try er_kernel. It uses DTrace to
do statistical callstack sampling, and is described on our kernel
profiling
On Mar 1, 2008, at 3:41 AM, Bill Shannon wrote:
Running just plain iosnoop shows accesses to lots of files, but none
on my zfs disk. Using iosnoop -d c1t1d0 or iosnoop -m /export/
home/shannon
shows nothing at all. I tried /usr/demo/dtrace/iosnoop.d too, still
nothing.
hi Bill
this
Marty Itzkowitz wrote:
Interesting problem. I've used disk rattle as a measurement of io
activity before
there were such tools for measurement. It's crude, but effective.
To answer your question: you could try er_kernel. It uses DTrace to
do statistical callstack sampling, and is
Bob Friesenhahn wrote:
On Sat, 1 Mar 2008, Bill Shannon wrote:
Curiously, when I came in to my office this morning, I didn't hear my
disk making noise. It wasn't until after I unlocked the screen that
the noise started, which makes my think it must be something related
to my desktop.
Jonathan Edwards wrote:
On Mar 1, 2008, at 3:41 AM, Bill Shannon wrote:
Running just plain iosnoop shows accesses to lots of files, but none
on my zfs disk. Using iosnoop -d c1t1d0 or iosnoop -m
/export/home/shannon
shows nothing at all. I tried /usr/demo/dtrace/iosnoop.d too, still
Bill Shannon wrote:
Marty Itzkowitz wrote:
Interesting problem. I've used disk rattle as a measurement of io
activity before
there were such tools for measurement. It's crude, but effective.
To answer your question: you could try er_kernel. It uses DTrace to
do statistical callstack
On Sat, 1 Mar 2008, Bill Shannon wrote:
I think I've reached the limit of what I can do remotely. Now I have
to repeat all these experiments when I'm sitting next to the disk and
can actually hear it and see if the correlation remains. Then, it may
be time to dig into the ksh93 code and
