Reasoning:
- implementation was unsound -- broke down when I added a fairly
basic macro definition expanding to a struct initializer in a *.c
file.
- made it way too easy (e.g. via otherwise totally innocuous git
commands) to end up with timestamps such that it always ran
MakeHeader.py but never used its output, leading to overbuild noise
when running what should be a null 'make'.
- but mostly: it's just an awkward way of dealing with C code.
GCC10 and Clang11 now default to -fno-common.
ld: error: duplicate symbol: jail_errmsg
>>> defined at Platform.c
>>> freebsd/Platform.o:(jail_errmsg)
>>> defined at FreeBSDProcessList.c
>>> freebsd/FreeBSDProcessList.o:(.bss+0x90)
Signed-off-by: Tobias Kortkamp <t@tobik.me>
New meter displays same ARC stats as FreeBSD top(1).
Can be extended to other platforms that support ZFS.
Pulling kstat.zfs.misc.arcstats.c_max as the meter
total, so the meter has a meaningful value to work
up to.
The Text meter displays, first, the maximum
ARC size (Meter.total), then second, the total
ARC used, using the difference between Meter.maxItems
and Meter.curItems to "hide" the used value from the
Bar and Graph drawing functions by using an index
in Meter.values[] that is beyond curItems - 1, but
less than maxItems - 1.
Zev Weiss