top: with new 'X' command, WCHAN becomes fixed-width
This 'Sleeping in function' field was made variable width because the length of current kernel symbols usually exceeded the former top's 9 character limit. As a variable width field it would steal valuable horizontal display positions from other, more likely, displayed fields such as COMMAND or CGROUPS. With the advent of the new 'X' toggle, no fixed-width non-scalable field need suffer permanent truncation. Thus, WCHAN is being made fixed width with a default size of 10 characters. Signed-off-by: Jim Warner <james.warner@comcast.net> top/top.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
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top/top.1
11
top/top.1
@ -718,13 +718,6 @@ By displaying this field, \*(We's own working set could be increased by over
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Should that occur, your only means of reducing that overhead will be to stop
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and restart \*(We.
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\*(NT The 'WCHAN' field, unlike most columns, is not fixed-width.
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When displayed, it plus any other variable width columns will be allocated
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all remaining screen width (up to the maximum \*(WX characters).
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Even so, such variable width fields could still suffer truncation.
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\*(XT 5c. SCROLLING a Window for additional information on accessing
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any truncated data.
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.TP 4
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37.\fB nDRT \*(Em Dirty Pages Count \fR
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The number of pages that have been modified since they were last
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@ -973,8 +966,8 @@ by a '+' in the last position.
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This \*(CI can be used to alter the widths for the following fields:
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.Bd -literal
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\fI field default field default \fR
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GID 5 GROUP 8
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\fI field default field default field default \fR
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GID 5 GROUP 8 WCHAN 10
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RUID 5 RUSER 8
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SUID 5 SUSER 8
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UID 5 USER 8
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@ -1382,7 +1382,7 @@ static FLD_t Fieldstab[] = {
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{ 4, SK_no, A_right, SF(DRT), L_statm },
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{ 1, -1, A_right, SF(STA), L_EITHER },
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{ -1, -1, A_left, SF(CMD), L_EITHER },
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{ -1, -1, A_left, SF(WCH), L_stat },
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{ 10, -1, A_left, SF(WCH), L_stat },
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{ 8, -1, A_left, SF(FLG), L_stat },
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{ -1, -1, A_left, SF(CGR), L_CGROUP },
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{ -1, -1, A_left, SF(SGD), L_status },
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@ -1901,6 +1901,8 @@ static void zap_fieldstab (void) {
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= Rc.fixed_widest ? 8 + Rc.fixed_widest : 8;
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Fieldstab[P_TTY].width
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= Rc.fixed_widest ? 8 + Rc.fixed_widest : 8;
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Fieldstab[P_WCH].width
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= Rc.fixed_widest ? 10 + Rc.fixed_widest : 10;
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// lastly, ensure we've got proper column headers...
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calibrate_fields();
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@ -3955,7 +3957,7 @@ static const char *task_show (const WIN_t *q, const proc_t *p) {
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u = hex_make(p->wchan, 0);
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else
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u = lookup_wchan(p->wchan, p->tid);
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makeVAR(u);
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cp = make_str(u, W, Js);
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}
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break;
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default: // keep gcc happy
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