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Re: Linux VFS cache hit rate script
On 04/22/2011 12:16 PM, Jake Maul wrote:
> No problem... seems to have no effect though:
>
> 339869 dev: 16 devname: N/A
> 345 dev: 18 devname: N/A
> 4569 dev: 22 devname: N/A
> 5 dev: 23 devname: N/A
> 798 dev: 265289728 devname: dm-0
> 640 dev: 3 devname: N/A
> 2594 dev: 5 devname: N/A
> 250861 dev: 6 devname: N/A
>
> I just commented out the existing version in
> /usr/share/systemtap/tapsets/vfs.stp, and put your function in
> instead. Do I need to do anything more than that, like rebuild
> something? (not a systemtap dev)
That should do it. I should have been more clear - the effect I
intended was just to relieve the need for MAXMAPENTRIES. The
"__devnames" map should now only contain the real device names, and not
waste any time/space on "N/A" entries. Your script's output would not
be affected though.
Josh