Re: [pcp] arc/zpool metric support on linux (#32)

[cburroughs <notifications@xxxxxxxxxx>]

I use ZFS on linux but probably do not have the time/expertise to work on this in the near future.

The kstats for the arc are exposed via /proc. Tools like arcstat and arcsummary have succesfully been ported to Linux using this.

$ cat /proc/spl/kstat/zfs/arcstats  | head
5 1 0x01 85 4080 13244929775 34208057604003643
name                            type data
hits                            4    20277124688
misses                          4    20409570979
demand_data_hits                4    18717631221
demand_data_misses              4    17805335114
demand_metadata_hits            4    347311602
demand_metadata_misses          4    3882959
prefetch_data_hits              4    262568264
prefetch_data_misses            4    2596018462

libzfs will (I think) "Just Work" (with the standard caveats about it not being intended as a stable/production interface). It looks like that is how pcp is getting the zpool topoligy information.

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