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path: root/src/vppinfra/bihash_template.h
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2020-08-17vppinfra: fix RC in bihash instantiationNathan Skrzypczak1-3/+3
There can be a race condition in the case a thread tries to do a bihash_search while another instantiates the bihash. Type: fix Change-Id: Ic61b590763beb409e112957c43a5a66cd10afb28 Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
2020-08-06vppinfra: harmonize function namesDave Barach1-2/+2
Type: fix Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Icce7eab4510785e15bdcf97e4d1881b0f46f6899
2020-04-23vppinfra: more bihash optimizatonsDamjan Marion1-12/+34
* Avoid doing expensive bit extraction for most likely case where bucket .log2_page_size == 0 and .linear_search == 0, saves 3-5 cycles for lookup, data_prefetch and add operation * use bextr instruction when available (x86 BMI instruction set) Type: improvement Change-Id: I163df36a29287482c5f133be8b21d62a2f7440de Signed-off-by: Damjan Marion <damarion@cisco.com>
2020-04-22vppinfra: fix potential race in bihash bucket lockDamjan Marion1-11/+9
Type: improvement Change-Id: Ia04bd26ecd689894753e036e52920316de611910 Signed-off-by: Damjan Marion <damarion@cisco.com>
2020-04-22vppinfra: improve bihash add/del performanceDamjan Marion1-7/+9
Measured improvement is from 439 to 167 clocks for add operation in 16_8 case... Type: improvement Change-Id: I975ff46ff30b983a3ec80a5cde25ccb68d7fa03b Signed-off-by: Damjan Marion <damarion@cisco.com>
2020-04-21vppinfra: bihash improvementsDave Barach1-13/+40
Template instances can allocate BIHASH_KVP_PER_PAGE data records tangent to the bucket, to remove a dependent read / prefetch. Template instances can ask for immediate memory allocation, to avoid several branches in the lookup path. Clean up l2 fib, gpb plugin codes: use clib_bihash_get_bucket(...) Use hugepages for bihash allocation arenas Type: improvement Signed-off-by: Dave Barach <dave@barachs.net> Signed-off-by: Damjan Marion <damarion@cisco.com> Change-Id: I92fc11bc58e48d84e2d61f44580916dd1c56361c
2020-03-27vppinfra: add clib_bihash_get_bucketDamjan Marion1-14/+11
Type: improvement Change-Id: I073bb7bea2a55eabbb6c253b003966f0a821e4a3 Signed-off-by: Damjan Marion <damarion@cisco.com>
2019-12-16vppinfra: bihash walk cb typedef and continue/stop controlsNeale Ranns1-1/+9
Type: feature Change-Id: I28f7a658be3f3beec9ea32635b60d1d3a10d9b06 Signed-off-by: Neale Ranns <nranns@cisco.com>
2019-09-03vppinfra: add bihash_init2Dave Barach1-0/+13
Add controls to list / not list a specific bihash in clib_all_bihashes, to immediately initialize a bihash. clib_bihash_init2 is now the primary API. It takes a typical args_t structure. clib_bihash_init becomes a compatibility widget. It fabricates an args_t and calls init2... Type: refactor Ticket: VPP-1758 Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Ib3e1304884997cf7025af20bdc67a7dda290f15b
2019-08-01vppinfra: make first bihash add thread-safeDave Barach1-0/+1
Type: fix Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Ie37ff66faba79e3b8f46c7a704137f9ef2acc773
2019-07-09vppinfra: allocate bihash virtual space on demandDave Barach1-0/+14
Reduces the vpp image virtual size by multiple gigabytes Add a "show bihash" command which displays configured and current virtual space in use by bihash tables. Modify the .py test framework to call "show bihash" on test tear-down Type: refactor Change-Id: Ifc1b7e2c43d29bbef645f6802fa29ff8ef09940c Signed-off-by: Dave Barach <dave@barachs.net>
2019-05-07Add bihash statistics hookDave Barach1-5/+63
Example / unit-test in .../src/plugins/unittest/bihash_test.c Change-Id: I23fd0ba742d65291667a755965aee1a3d3477ca2 Signed-off-by: Dave Barach <dave@barachs.net>
2018-09-19bihash template: reinstate the check for the available memory in the arenaAndrew Yourtchenko1-2/+2
ffb14b9554afa1e58c3657e0c91dda3135008274 has changed the semantics of alloc_arena_next to become an offset off alloc_arena, but in the available memory check in BV (alloc_aligned) it still treats it as a virtual address, resulting in the check always succeeding, thus over a prolonged period bihash arena allocator potentially overwriting whatever is following the arena. Change-Id: I18882c5f340ca767a389e15cca2696a0a97ef015 Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
2018-09-11bihash 32/64 bit shared memory interopDave Barach1-6/+6
This patch makes 32/64 bit interoperable shared memory bihash tables work regardless of where they're mapped. Change-Id: If5b4a37ccdaa75410eba755c7d7195633de1b30b Signed-off-by: Dave Barach <dave@barachs.net>
2018-08-2832/64 shmem bihash interoperabilityDave Barach1-13/+83
Move the binary api segment above 4gb Change-Id: I40e8aa7a97722a32397f5a538b5ff8344c50d408 Signed-off-by: Dave Barach <dave@barachs.net>
2018-08-23bihash: remove unused countersDamjan Marion1-3/+0
Change-Id: I1f0aae16e4ace850d7d79b9c2c644a3e0d002636 Signed-off-by: Damjan Marion <damarion@cisco.com>
2018-08-22bihash: add support for reuse of expired entry when bucket is full (VPP-1272)Matus Fabian1-0/+6
Applications such as NAT that dynamically create entries require these entries to expire after some time. Bihash user can now lazily delete expired entries. When inserting and bucket is full, expired entry is overwritten. Change-Id: I6852305df399b546159407f1729c856afde5a634 Signed-off-by: Matus Fabian <matfabia@cisco.com>
2018-07-20bihash: give hint to CPU that we are spinlockingDamjan Marion1-3/+5
Change-Id: I78c0a6da5d8fc63c1ced43589c42abc15ab12b16 Signed-off-by: Damjan Marion <damarion@cisco.com>
2018-07-20Fine-grained add / delete lockingDave Barach1-187/+33
Add a bucket-level lock bit. Use a spinlock only when actually allocating, freeing, or splitting a bucket. Should improve multi-thread add/del performance. Change-Id: I3e40e2a8371685457f340d6584dea14e3207f2b0 Signed-off-by: Dave Barach <dave@barachs.net>
2018-07-18vppinfra: increase max bihash arena size to 512GBDamjan Marion1-7/+17
Change-Id: Ic636297df4c03303fdcb176669f0268d80e22123 Signed-off-by: Damjan Marion <damarion@cisco.com>
2018-06-14Add clib_bihash_search_inline_2_with_hash to bihash templateAndrew Yourtchenko1-5/+15
Use similar approach as in the clib_bihash_search_inline_with_hash to be able to do the hash calculation and lookup separately. Change-Id: Ief79aa0f9f1e42b0af88be4807ca01fac30a80d7 Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
2018-02-23Add prefetch inlines, update bi-hash doc tagsDave Barach1-6/+47
Change-Id: I2e9d01ccba5288e89b886464436097d3cb7d2d18 Signed-off-by: Dave Barach <dave@barachs.net>
2018-02-22bihash table size perf/scale improvementsDave Barach1-4/+10
Directly allocate and carve cache-line-aligned chunks of virtual memory. To a first approximation, bihash wasn't using clib_mem_free(...). We eliminate mheap object header/trailers, which improves space efficiency. We also eliminate the 4gb bihash table size limit. An 8_8 bihash w/ 100 million random entries uses 3.8 Gbytes. Change-Id: Icf925fdf99bce7d6ac407ac4edd30560b8f04808 Signed-off-by: Dave Barach <dave@barachs.net>
2018-02-08Minimize bihash memory consumptionDave Barach1-16/+16
Reference-count the number of entries in each bucket. If the reference count goes to zero, free the backing store. Add long-term churn-testing to test_bihash_template.c, thanks to Andrew Yourtchenko for the initial implementation. Change-Id: I4fbd9229cacfaba8027a85cbf87b74afdead6e39 Signed-off-by: Dave Barach <dave@barachs.net>
2018-01-24Adding a format function for bihash init routine to format the key, value, ↵Vijayabhaskar Katamreddy1-0/+8
when verbose option is used Change-Id: Ib63ead4525332f897b8a1d8a4cf5a0eb1da1e7f3 Signed-off-by: Vijayabhaskar Katamreddy <vkatamre@cisco.com>
2017-08-31Fix BIHASH_KVP_CACHE_SIZE == 0 caseDave Barach1-2/+23
Setting the bucket-level LRU cache size to zero removes the bucket-level LRU cache code. Change-Id: Idf2e63d0d508675e957366515863766f79a3479c Signed-off-by: Dave Barach <dbarach@cisco.com>
2017-07-23Atomic bucket lockDave Barach1-28/+44
Change-Id: I84908b9ad30d7555024e98b69ed37b111f31c27a Signed-off-by: Dave Barach <dbarach@cisco.com>
2017-07-19Add a bihash prefetchable bucket-level cacheDave Barach1-23/+183
According to Maciek, the easiest way to leverage the csit "performance trend" job is to actually merge the patch once verified. Manual testing indicates that the patch improves l2 path performance. Other use-cases are TBD. It's possible that we'll need to back out the patch depending on what happens. Change-Id: Ic0a0363de35ef9be953ad7709c57c3936b73fd5a Signed-off-by: Dave Barach <dave@barachs.net>
2017-05-18VPP-847: improve bihash template memory allocator performanceDave Barach1-0/+1
Particularly in the DCLIB_VEC64=1 case, using vectors vs. raw clib_mem_alloc'ed memory causes abysmal memory allocator performance. Change-Id: I07a4dec0cd69ca357445385e2671cdf23c59b95d Signed-off-by: Dave Barach <dave@barachs.net>
2017-01-02Handle execessive hash collisions, VPP-555Dave Barach1-12/+19
Change-Id: I55dad7b5cfb3d38c22b1105f7d2d61e7449410ea Signed-off-by: Dave Barach <dave@barachs.net>
2016-12-28Reorganize source tree to use single autotools instanceDamjan Marion1-0/+214
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>