src/usr.bin/vmstat, branch release/8.1.0

MFC 198620:

2009-11-06T20:33:40Z

When fetching sum stats (vmstat -s) from a crash dump, fetch per-CPU counts and sum them to form the total counts.

Utilize calloc() instead of bzero'ing manually.

2009-02-21T03:43:20Z

Fix comment typo that managed to sneak in when I copy pasted some

2008-11-04T18:20:54Z

comments & code from iostat.

Repeat vmstat header after window.rows instead of a hardcoded 20.

2008-11-04T18:02:35Z

Use ioctl() to get the window size in vmstat(8), and force a new header to be prepended to the output every time the current window size changes. Change the number of lines before each header to the current lines of the terminal when the terminal is resized, so that the full terminal length can be used for output lines. Inspired by: svn change 175562 (same feature for iostat) Reviewed by: ru (who fixed some of my bugs too) MFC after: 1 week

Use kvm_getcptime(3) to fetch the global CPU time stats from a crashdump

2008-08-19T21:33:09Z

since the 'cp_time' symbol doesn't exist in recent kernels. This fixes iostat and vmstat on crash dumps. MFC after: 1 week

Add forgotten -H, -h, and -P to usage().

2008-04-10T09:56:57Z

Fix some boolean logic errors. && vs & and other sillyness. blush

2008-01-18T22:09:44Z

This would prevent it from skipping non-present cpus in -P output. Submitted by: Pieter de Goeje

Add the -H, -h and -P flags to vmstat. -P causes per-cpu output of

2007-12-13T02:36:11Z

user/system/idle stats. -h feeds the memory column through humanize_number() to reduce the amount of column overflowing. -H turns this off. -h is turned on by default if stdout is a tty.

Add a counter for the total number of pages cached and support for

2007-07-27T20:01:22Z

reporting the value of this counter in the program "vmstat". Approved by: re (rwatson)

- Revert signedness type changes to "struct vmtotal"; by making

2006-11-28T12:46:02Z

them unsigned I made the possible overflows hard to detect, and it only saved 1 bit which isn't principal, even less now that the underlying issue with the total of virtual memory has been fixed. (For the record, it will overflow with >=2T of VM total, with 32-bit ints used to keep counters in pages.) - While here, fix printing of other "struct vmtotal" members such as t_rq, t_dw, t_pw, and t_sw as they are also signed. Reviewed by: bde MFC after: 3 days