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top: extend scaled process memory range to include PiB

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The recent change to task area memory scaling was just
a little short of optimum in its consistency and upper
limits. In fact, top could only scale memory fields up
to a maximum of 99.9999 TiB (with VIRT a little more).

While that seems like more than enough it was actually
artificially low, due to an unnecessary decimal place.

So, this commit standardizes both precision and widths
to achieve a minimum amount of scaling beyond the user
requested target plus reclaim some horizontal spacing.

. VIRT & DATA are now 7 bytes wide (not eight and six)
. other memory fields are 6 wide (were formerly seven)
. as before, KiB shows whole numbers only (no decimal)
. MiB, for its precision, shows a single decimal place
. all other memory ranges display three decimal places

The net result is a more homogeneous display with less
forced scaling and the recovery of three lost columns.

(now that we know a '.' + 2 spaces is squeezed to one)
(everything's perfectly justified, but it's just luck)

Reference(s);
http://www.freelists.org/post/procps/top-enhancements-i-hope,1

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner
2012-12-18 00:00:00 -06:00
committed by Craig Small
parent e6cb40235e
commit 2e7adced74
2 changed files with 19 additions and 16 deletions
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top/top.1
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@@ -857,7 +857,7 @@ depending on the context in which they are issued.
.Bd -literal
4a.\fI Global-Commands \fR
<Ent/Sp> ?, =, 0,
A, B, d, E, g, h, H, I, k, q, r, s, W, X, Y, Z
A, B, d, E, e, g, h, H, I, k, q, r, s, W, X, Y, Z
4b.\fI Summary-Area-Commands \fR
C, l, t, 1, m
4c.\fI Task-Area-Commands \fR
@@ -971,13 +971,15 @@ By raising the scaling factor, such truncation can be avoided.
.TP 7
\ \ \'\fBe\fR\' :\fIExtend-Memory-Scale\fR in Task Windows
With this command you can cycle through the available \*(TW memory scaling
which ranges from KiB (kibibytes or 1,024 bytes) through TiB (tebibytes or
1,099,511,627,776 bytes).
which ranges from KiB (kibibytes or 1,024 bytes) through PiB (pebibytes or
1,125,899,906,842,624 bytes).
While \*(We will try to honor the selected target range, additional
scaling might still be necessary in order to accommodate current values.
If you wish to see a more homogeneous result in the memory columns,
raising the scaling range will usually accomplish that goal.
Raising it too high, however, is likely to produce an all zero result
which cannot be suppressed with the '0' \*(CI.
.TP 7
\ \ \'\fBg\fR\' :\fIChoose-Another-Window/Field-Group \fR