src/lib/libmemstat, branch release/10.3.0 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=release%2F10.3.0 2013-06-18T04:50:20Z Refine UMA bucket allocation to reduce space consumption and improve 2013-06-18T04:50:20Z Jeff Roberson jeff@FreeBSD.org 2013-06-18T04:50:20Z urn:sha1:fc03d22b177ff18f9ce8ef220480581fdcadb298 performance. - Always free to the alloc bucket if there is space. This gives LIFO allocation order to improve hot-cache performance. This also allows for zones with a single bucket per-cpu rather than a pair if the entire working set fits in one bucket. - Enable per-cpu caches of buckets. To prevent recursive bucket allocation one bucket zone still has per-cpu caches disabled. - Pick the initial bucket size based on a table driven maximum size per-bucket rather than the number of items per-page. This gives more sane initial sizes. - Only grow the bucket size when we face contention on the zone lock, this causes bucket sizes to grow more slowly. - Adjust the number of items per-bucket to account for the header space. This packs the buckets more efficiently per-page while making them not quite powers of two. - Eliminate the per-zone free bucket list. Always return buckets back to the bucket zone. This ensures that as zones grow into larger bucket sizes they eventually discard the smaller sizes. It persists fewer buckets in the system. The locking is slightly trickier. - Only switch buckets in zalloc, not zfree, this eliminates pathological cases where we ping-pong between two buckets. - Ensure that the thread that fills a new bucket gets to allocate from it to give a better upper bound on allocation time. Sponsored by: EMC / Isilon Storage Division Const-ify the zone name argument to uma_zcreate(9). 2012-10-26T17:51:05Z Matthew D Fleming mdf@FreeBSD.org 2012-10-26T17:51:05Z urn:sha1:bb196eb4805e3df02e4ce377f918ff94bde40c1a MFC after: 3 days Fix various typos in manual pages. 2012-02-25T14:31:25Z Glen Barber gjb@FreeBSD.org 2012-02-25T14:31:25Z urn:sha1:3102cfe2e21aaea969dcc5245c0b70d9ae643e34 Submitted by: amdmi3 PR: 165431 MFC after: 1 week Cosmetic cleanup: remove #define LIBMEMSTAT used to prevent a nested 2011-09-02T14:10:42Z Sergey Kandaurov pluknet@FreeBSD.org 2011-09-02T14:10:42Z urn:sha1:cfc9e655bacc58c2098f47f52302884beb1453c1 include of opt_vmpage.h from vm/vm_page.h. opt_vmpage.h was retired before 7.0 together with options PQ_NOOPT. Approved by: re (kib) MFC after: 3 days Get rid of MAXCPU knowledge used for internal needs only. Switch to 2011-08-01T09:43:35Z Sergey Kandaurov pluknet@FreeBSD.org 2011-08-01T09:43:35Z urn:sha1:1882360b9b0fbd7f4ddcd6fb35674ec309b2a738 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) Revert r222363, as bde@ pointed out the initial solution was far more 2011-05-31T20:59:53Z Attilio Rao attilio@FreeBSD.org 2011-05-31T20:59:53Z urn:sha1:1de471dfee9267dde6b33dd262faefffb2b71bc9 correct. Style fix: cast to size_t rather than u_long when comparing to sizeof() 2011-05-27T16:01:51Z Attilio Rao attilio@FreeBSD.org 2011-05-27T16:01:51Z urn:sha1:d361ed4b1ca199522f067ecf7b9fd66d10642d1e rets. Requested by: kib Sync with -CURRENT 2011-05-10T18:01:53Z Attilio Rao attilio@FreeBSD.org 2011-05-10T18:01:53Z urn:sha1:d40d5f64a2f17d7f00658f6f04c8b65b746ee3fa Fix a mismerge. 2011-05-08T14:45:53Z Attilio Rao attilio@FreeBSD.org 2011-05-08T14:45:53Z urn:sha1:be720a4061f9da8e1844da27b17fbb50322a293b Revert MAXCPU introduction. In userland it is always 1. 2011-05-08T14:29:25Z Attilio Rao attilio@FreeBSD.org 2011-05-08T14:29:25Z urn:sha1:34e4a6f408ae92e30d943f1083807e2932497371 Noted by: marcel