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path: root/src/svm/message_queue.c
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2023-08-09session: async rx event notificationsFlorin Coras1-5/+5
Move from synchronous flushing of io and ctrl events from transports to applications to an async model via a new session_input input node that runs in interrupt mode. Events are coalesced per application worker. On the one hand, this helps by minimizing message queue locking churn. And on the other, it opens the possibility for further optimizations of event message generation, obviates need for rx rescheduling rpcs and is a first step towards a fully async data/io rx path. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Id6bebcb65fc9feef8aa02ddf1af6d9ba6f6745ce
2022-04-21session svm: fix mq producer wait on q and ringFlorin Coras1-5/+32
Make sure producer drops lock when it waits for empty ring slot. Type: fix Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Id77d54ee8c01bed20c9eaf5ad372ed4b1e9fa712
2021-03-30svm: cleanup mq private data on fifo segment cleanupFlorin Coras1-1/+10
Type: fix Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I65373f2cd5a33381da1e51ed7ab7a8b1358cef29
2021-03-29svm session vcl: per app rx message queuesFlorin Coras1-1/+1
Add option to use per app private segments for app to vpp message queues, as opposed to exposing internal message queues segment. When so configured, internal message queues are still polled by the session queue node but external app message queues are handled by a new input node (appsl-rx-mqs-input) that runs in interrupt state. Signaling of the node, when mqs receive new messages, is done through eventfds epolled by worker epoll input nodes. Type: feature Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Iffe8ce5a9944a56a14e6d0f492a850cb9e392d16
2021-03-25svm: add producer wait functionFlorin Coras1-11/+36
Type: refactor Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I9488ad7e045c908b60b5821d9c48583f6d513c2f
2021-03-25svm: fix producer deadlock in svm_msg_q_wait()nandfan1-5/+9
1. When producer invokes svm_msg_q_wait() in svm_msg_q_lock_and_alloc_msg_w_ring(), queue mutex is held by itself. 2. Sometimes, svm msg queue is not full and ring is full, svm_msg_q_wait() do nothing with mutex held, consumer will blocking at svm_msg_q_send_signal(). Type: fix Signed-off-by: nandfan <fanyufei521@outlook.com> Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ib90b87ab76534cd42e9a4c3e11703e80d93ca678
2021-02-15svm: fix mq coverity warningFlorin Coras1-2/+7
Type: fix Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I1914366c17fa05305d57d842793fad372319256a
2021-02-05session svm: non blocking mqFlorin Coras1-59/+118
Avoid synchronizing producers and the consumer. Instead, only use mutex or spinlock (if eventfds are configured) to synchronize producers. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ie2aafbdc2e07fced5d5e46ee2df6b30a186faa2f
2021-01-25svm: add custom q implementation for mqFlorin Coras1-32/+237
Add separate queue implementation for the message queue as it's custom tailored for fifo segments as opposed to binary api. Also move eventfds to the private data structures. Type: refactor Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I6df0c824ecd94c7904516373f92a9fffc6b04736
2020-12-29svm: allow mq attachments at random offsetsFlorin Coras1-64/+72
Type: feature Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ic373cd2c11272da539eb4b0db27227f36f2f9688
2020-12-23svm: remove fifo segment heapFlorin Coras1-20/+57
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I518e096fe13847759806ff62009e73fd8f7451b7
2019-12-30svm: broadcast on raw dequeues and full ringsFlorin Coras1-0/+6
Type: fix Change-Id: I0cac9001290e7ed4e2e318ae62c56e97ec75a3db Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-12-11session: Add mq debug cliNathan Skrzypczak1-0/+14
Type: feature This add a `show app message queue` cli command that shows mq size per app & thread. Change-Id: I5c6ce024b149fb7a47d899bc514c5a4887429982 Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
2019-09-20session: fix msg freeing on errorNathan Skrzypczak1-5/+0
Type: fix Change-Id: I0807f84737d5e98e69e9ed27a1de6813b2ddd138 Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
2019-07-29session: fix vpp to app msg generationFlorin Coras1-2/+4
Type:fix Freeing mq messages in vpp (producer), if enqueueing fails, invalidates consumer assumption that messages can be freed without a lock. Change-Id: I748a33b8846597bdad865945d8e899346d482434 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Tal Saiag <tal.saiag@gmail.com>
2019-06-18session: fix memory out of bound issueLijian.Zhang1-1/+1
Ring data space is following ring vec_header_t and ring elements immediately. Add verification code in session_test. Type: fix Change-Id: I0bfa096a9f459128a588821d99b5cdb4f10ede38 Signed-off-by: Lijian Zhang <Lijian.Zhang@arm.com> Reviewed-by: Sirshak Das <Sirshak.Das@arm.com>
2018-10-19vppinfra: add atomic macros for __sync builtinsSirshak Das1-3/+3
This is first part of addition of atomic macros with only macros for __sync builtins. - Based on earlier patch by Damjan (https://gerrit.fd.io/r/#/c/10729/) Additionally - clib_atomic_release macro added and used in the absence of any memory barrier. - clib_atomic_bool_cmp_and_swap added Change-Id: Ie4e48c1e184a652018d1d0d87c4be80ddd180a3b Original-patch-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Sirshak Das <sirshak.das@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com> Reviewed-by: Steve Capper <steve.capper@arm.com>
2018-09-12vcl: improve read and fifo event handlingFlorin Coras1-2/+2
Change-Id: Ic1c51818b8aa8dbd164e70bb3b7471868e5af6f6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-08-10vcl: support for eventfd mq signalingFlorin Coras1-0/+33
- support eventfd based mq signaling. Based on configuration, vcl epoll/select can use either condvars or epoll on mq eventfds. - add vcl support for memfd segments - vpp explicitly registers cut-through segments with apps/vcl - if using eventfd, make ldp allow one call to libc_epoll_create. Needed for the message queue epfd - update svm_queue_t to allow blocking calls with eventfd signaling. Change-Id: I064151ac370bbe29bb16c968bf4e3659c8286bea Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-08-03svm: add support for eventfd signaling to queueFlorin Coras1-7/+9
Support the use of eventfds to signal queue updates between consumer and producer pairs. Change-Id: Idb6133be2b731fff78ed520daf9d2e0399642aab Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-27vcl: use events for epoll/select/read/writeFlorin Coras1-11/+11
Have vcl poll and wait on the event message queues as opposed to constantly polling the session fifos. This also adds event signaling to cut through sessions. On the downside, because we can't wait on multiple condvars, i.e., when we have multiple message queues because of cut-through registrations, we do timed waits. Change-Id: I29ade95dba449659fe46008bb1af502276a7c5fd Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-18svm: make message queue more compactFlorin Coras1-16/+29
Change-Id: Id45957163c2b95a2300a8ac9104fc92b9cc928ed Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-17session: send ctrl msg over mqFlorin Coras1-1/+2
Change-Id: I242056bc46ddb671064665916b2687860292dcb2 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-17session: use msg queue for eventsFlorin Coras1-18/+84
Change-Id: I3c58367eec2243fe19b75be78a175c5261863e9e Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-08session/svm: fix coverity warningsFlorin Coras1-2/+5
Change-Id: Ic5daed1f6c23d9561a04e235dcbf257f190d066a Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-06svm: add unidirectional message queueFlorin Coras1-0/+159
Meant for single reader/writer message exchanges. Supports multiple message rings. Change-Id: I925de9a6ae19226c5c39a63caff76424ed123a13 Signed-off-by: Florin Coras <fcoras@cisco.com>