[Bug 230840] top - proposed enhancements

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230840

Michael Dexter <editor at callfortesting.org> changed:

           What    |Removed                     |Added
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                 CC|                            |editor at callfortesting.org

--- Comment #3 from Michael Dexter <editor at callfortesting.org> ---
Overheard: "top(1) began as a refreshing ps(1)"

File system-related memory consumption by ARC, the L2ARC table, tmpfs(5),
"malloc" md(4) devices are keen interest but we should be clear if top(1) is
the place to put it.

The first question is: Is the desired information available from the kernel at
this time or is it intertwined with other memory statistics?

One thought: While gstat(8) is GEOM-specific, it would be nice if it would be
useful if it reported tmpfs(5) and md(4) activity. Following the top(1) model,
an optional header with longer-term statistics for ARC, tmpfs, md would be
interesting:


ARC: 12G Total, 3250M MFU, 8304M MRU, 1332K Anon, 134M Header, 439M Other
     7572M Compressed, 33G Uncompressed, 4.53:1 Ratio
L2ARC: Table 2G (other stats?)
tmpfs: 34G (other stats?)
md: 2G (other stats?)

dT: 1.008s  w: 1.000s
 L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
    0      0      0      0    0.0      0      0    0.0    0.0| da0
    0      0      0      0    0.0      0      0    0.0    0.0| da1
    0      0      0      0    0.0      0      0    0.0    0.0| da2
    0      0      0      0    0.0      0      0    0.0    0.0| da3
    0      0      0      0    0.0      0      0    0.0    0.0| cd0
    0      0      0      0    0.0      0      0    0.0    0.0| md0
    0      0      0      0    0.0      0      0    0.0    0.0| tmpfsfoo

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