src/lib/libmemstat/memstat.h, branch releng/11.3

Revert r330897:

2018-03-29T02:50:57Z

This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code. Revert with prejudice. This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes. Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes. Requested by: gjb (re)

Partial merge of the SPDX changes

2018-03-14T03:19:51Z

These changes are incomplete but are making it difficult to determine what other changes can/should be merged. No objections from: pfg

Expose real size of UMA allocations via libmemstat(3).

2014-02-10T20:09:10Z

Get rid of MAXCPU knowledge used for internal needs only. Switch to

2011-08-01T09:43:35Z

dynamic memory allocation to hold per-CPU memory types data (sized to mp_maxid for UMA, and to mp_maxcpus for malloc to match the kernel). That fixes libmemstat with arbitrary large MAXCPU values and therefore eliminates MEMSTAT_ERROR_TOOMANYCPUS error type. Reviewed by: jhb Approved by: re (kib)

Add a new column to the output of vmstat -z to indicate the number

2010-06-15T19:28:37Z

of times the system was forced to sleep when requesting a new allocation. Expand the debugger hook, db_show_uma, to display these results as well. This has proven to be very useful in out of memory situations when it is not known why systems have become sluggish or fail in odd ways. Reviewed by: rwatson alc Approved by: scottl (mentor) peter Obtained from: Yahoo Inc.

Fix a comment in memstat.h: errors are associated with memory type lists,

2007-03-15T10:44:18Z

not individual types. Submitted by: Bryan Venteicher MFC after: 3 days

Increase the number of CPUs to 32 to suit sun4v.

2006-07-26T07:46:32Z

Reviewed by: rwatson@

Teach libmemstat(3) how to extract malloc(9) statistics using kvm(3),

2005-08-06T13:54:03Z

so that libmemstat can be used to view full memory statistics from kernel core dumps and /dev/mem. This is provided via a new query function, memstat_kvm_malloc(), which is also automatically invoked by memstat_kvm_all(). A kvm handle must be passed in. This will allow malloc(9)-specific code to be removed from vmstat(8).

Add memstat_kvm_uma(), an implementation of a libmemstat(3) query routine

2005-08-01T19:07:39Z

that knows how to extract UMA(9) allocator statistics from a core dump or live memory image using kvm(3). The caller is expected to provide the necessary kvm_t handle, which is then used by libmemstat(3). With these changes, it is trivially straight forward to re-introduce vmstat -z support on core dumps, which was lost when UMA was introduced. In the short term, this requires including vm/ include files that are not intended for extra-kernel use, requiring in turn some ugliness.

Having decided not to provide a libmemstat(3) error number to text

2005-07-24T01:41:47Z

conversion routine, now change my mind and add one, memstat_strerror(3), which returns a const char * pointer to a string describing the error, to be used on the results of memstat_mtl_geterror(). While here, also correct a minor typo in the HISTORY man page. Pointers on improving ease of internationalization would be appreciated. MFC after: 1 day