diff options
Diffstat (limited to 'src/msg/async/rdma/RDMAStack.cc')
| -rw-r--r-- | src/msg/async/rdma/RDMAStack.cc | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/src/msg/async/rdma/RDMAStack.cc b/src/msg/async/rdma/RDMAStack.cc new file mode 100644 index 00000000..f63a8e7d --- /dev/null +++ b/src/msg/async/rdma/RDMAStack.cc @@ -0,0 +1,610 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2016 XSKY <haomai@xsky.com> + * + * Author: Haomai Wang <haomaiwang@gmail.com> + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#include <poll.h> +#include <errno.h> +#include <sys/time.h> +#include <sys/resource.h> + +#include "include/str_list.h" +#include "include/compat.h" +#include "common/Cycles.h" +#include "common/deleter.h" +#include "common/Tub.h" +#include "RDMAStack.h" + +#define dout_subsys ceph_subsys_ms +#undef dout_prefix +#define dout_prefix *_dout << "RDMAStack " + +RDMADispatcher::~RDMADispatcher() +{ + ldout(cct, 20) << __func__ << " destructing rdma dispatcher" << dendl; + polling_stop(); + + ceph_assert(qp_conns.empty()); + ceph_assert(num_qp_conn == 0); + ceph_assert(dead_queue_pairs.empty()); + ceph_assert(num_dead_queue_pair == 0); + + delete async_handler; +} + +RDMADispatcher::RDMADispatcher(CephContext* c, RDMAStack* s) + : cct(c), async_handler(new C_handle_cq_async(this)), lock("RDMADispatcher::lock"), + w_lock("RDMADispatcher::for worker pending list"), stack(s) +{ + PerfCountersBuilder plb(cct, "AsyncMessenger::RDMADispatcher", l_msgr_rdma_dispatcher_first, l_msgr_rdma_dispatcher_last); + + plb.add_u64_counter(l_msgr_rdma_polling, "polling", "Whether dispatcher thread is polling"); + plb.add_u64_counter(l_msgr_rdma_inflight_tx_chunks, "inflight_tx_chunks", "The number of inflight tx chunks"); + plb.add_u64_counter(l_msgr_rdma_rx_bufs_in_use, "rx_bufs_in_use", "The number of rx buffers that are holding data and being processed"); + plb.add_u64_counter(l_msgr_rdma_rx_bufs_total, "rx_bufs_total", "The total number of rx buffers"); + + plb.add_u64_counter(l_msgr_rdma_tx_total_wc, "tx_total_wc", "The number of tx work comletions"); + plb.add_u64_counter(l_msgr_rdma_tx_total_wc_errors, "tx_total_wc_errors", "The number of tx errors"); + plb.add_u64_counter(l_msgr_rdma_tx_wc_retry_errors, "tx_retry_errors", "The number of tx retry errors"); + plb.add_u64_counter(l_msgr_rdma_tx_wc_wr_flush_errors, "tx_wr_flush_errors", "The number of tx work request flush errors"); + + plb.add_u64_counter(l_msgr_rdma_rx_total_wc, "rx_total_wc", "The number of total rx work completion"); + plb.add_u64_counter(l_msgr_rdma_rx_total_wc_errors, "rx_total_wc_errors", "The number of total rx error work completion"); + plb.add_u64_counter(l_msgr_rdma_rx_fin, "rx_fin", "The number of rx finish work request"); + + plb.add_u64_counter(l_msgr_rdma_total_async_events, "total_async_events", "The number of async events"); + plb.add_u64_counter(l_msgr_rdma_async_last_wqe_events, "async_last_wqe_events", "The number of last wqe events"); + + plb.add_u64_counter(l_msgr_rdma_handshake_errors, "handshake_errors", "The number of handshake errors"); + + + plb.add_u64_counter(l_msgr_rdma_created_queue_pair, "created_queue_pair", "Active queue pair number"); + plb.add_u64_counter(l_msgr_rdma_active_queue_pair, "active_queue_pair", "Created queue pair number"); + + perf_logger = plb.create_perf_counters(); + cct->get_perfcounters_collection()->add(perf_logger); + Cycles::init(); +} + +void RDMADispatcher::polling_start() +{ + // take lock because listen/connect can happen from different worker threads + Mutex::Locker l(lock); + + if (t.joinable()) + return; // dispatcher thread already running + + get_stack()->get_infiniband().get_memory_manager()->set_rx_stat_logger(perf_logger); + + tx_cc = get_stack()->get_infiniband().create_comp_channel(cct); + ceph_assert(tx_cc); + rx_cc = get_stack()->get_infiniband().create_comp_channel(cct); + ceph_assert(rx_cc); + tx_cq = get_stack()->get_infiniband().create_comp_queue(cct, tx_cc); + ceph_assert(tx_cq); + rx_cq = get_stack()->get_infiniband().create_comp_queue(cct, rx_cc); + ceph_assert(rx_cq); + + t = std::thread(&RDMADispatcher::polling, this); + ceph_pthread_setname(t.native_handle(), "rdma-polling"); +} + +void RDMADispatcher::polling_stop() +{ + { + Mutex::Locker l(lock); + done = true; + } + + if (!t.joinable()) + return; + + t.join(); + + tx_cc->ack_events(); + rx_cc->ack_events(); + delete tx_cq; + delete rx_cq; + delete tx_cc; + delete rx_cc; +} + +void RDMADispatcher::handle_async_event() +{ + ldout(cct, 30) << __func__ << dendl; + while (1) { + ibv_async_event async_event; + if (ibv_get_async_event(get_stack()->get_infiniband().get_device()->ctxt, &async_event)) { + if (errno != EAGAIN) + lderr(cct) << __func__ << " ibv_get_async_event failed. (errno=" << errno + << " " << cpp_strerror(errno) << ")" << dendl; + return; + } + perf_logger->inc(l_msgr_rdma_total_async_events); + // FIXME: Currently we must ensure no other factor make QP in ERROR state, + // otherwise this qp can't be deleted in current cleanup flow. + if (async_event.event_type == IBV_EVENT_QP_LAST_WQE_REACHED) { + perf_logger->inc(l_msgr_rdma_async_last_wqe_events); + uint64_t qpn = async_event.element.qp->qp_num; + ldout(cct, 10) << __func__ << " event associated qp=" << async_event.element.qp + << " evt: " << ibv_event_type_str(async_event.event_type) << dendl; + Mutex::Locker l(lock); + RDMAConnectedSocketImpl *conn = get_conn_lockless(qpn); + if (!conn) { + ldout(cct, 1) << __func__ << " missing qp_num=" << qpn << " discard event" << dendl; + } else { + ldout(cct, 1) << __func__ << " it's not forwardly stopped by us, reenable=" << conn << dendl; + conn->fault(); + if (!cct->_conf->ms_async_rdma_cm) + erase_qpn_lockless(qpn); + } + } else { + ldout(cct, 1) << __func__ << " ibv_get_async_event: dev=" << get_stack()->get_infiniband().get_device()->ctxt + << " evt: " << ibv_event_type_str(async_event.event_type) + << dendl; + } + ibv_ack_async_event(&async_event); + } +} + +void RDMADispatcher::post_chunk_to_pool(Chunk* chunk) +{ + Mutex::Locker l(lock); + get_stack()->get_infiniband().post_chunk_to_pool(chunk); + perf_logger->dec(l_msgr_rdma_rx_bufs_in_use); +} + +int RDMADispatcher::post_chunks_to_rq(int num, ibv_qp *qp) +{ + Mutex::Locker l(lock); + return get_stack()->get_infiniband().post_chunks_to_rq(num, qp); +} + +void RDMADispatcher::polling() +{ + static int MAX_COMPLETIONS = 32; + ibv_wc wc[MAX_COMPLETIONS]; + + std::map<RDMAConnectedSocketImpl*, std::vector<ibv_wc> > polled; + std::vector<ibv_wc> tx_cqe; + ldout(cct, 20) << __func__ << " going to poll tx cq: " << tx_cq << " rx cq: " << rx_cq << dendl; + RDMAConnectedSocketImpl *conn = nullptr; + uint64_t last_inactive = Cycles::rdtsc(); + bool rearmed = false; + int r = 0; + + while (true) { + int tx_ret = tx_cq->poll_cq(MAX_COMPLETIONS, wc); + if (tx_ret > 0) { + ldout(cct, 20) << __func__ << " tx completion queue got " << tx_ret + << " responses."<< dendl; + handle_tx_event(wc, tx_ret); + } + + int rx_ret = rx_cq->poll_cq(MAX_COMPLETIONS, wc); + if (rx_ret > 0) { + ldout(cct, 20) << __func__ << " rx completion queue got " << rx_ret + << " responses."<< dendl; + perf_logger->inc(l_msgr_rdma_rx_total_wc, rx_ret); + perf_logger->inc(l_msgr_rdma_rx_bufs_in_use, rx_ret); + + Mutex::Locker l(lock);//make sure connected socket alive when pass wc + + for (int i = 0; i < rx_ret; ++i) { + ibv_wc* response = &wc[i]; + Chunk* chunk = reinterpret_cast<Chunk *>(response->wr_id); + + if (response->status == IBV_WC_SUCCESS) { + ceph_assert(wc[i].opcode == IBV_WC_RECV); + conn = get_conn_lockless(response->qp_num); + if (!conn) { + ldout(cct, 1) << __func__ << " csi with qpn " << response->qp_num << " may be dead. chunk " << chunk << " will be back ? " << r << dendl; + get_stack()->get_infiniband().post_chunk_to_pool(chunk); + perf_logger->dec(l_msgr_rdma_rx_bufs_in_use); + } else { + conn->post_chunks_to_rq(1); + polled[conn].push_back(*response); + } + } else { + perf_logger->inc(l_msgr_rdma_rx_total_wc_errors); + ldout(cct, 1) << __func__ << " work request returned error for buffer(" << chunk + << ") status(" << response->status << ":" + << get_stack()->get_infiniband().wc_status_to_string(response->status) << ")" << dendl; + if (response->status != IBV_WC_WR_FLUSH_ERR) { + conn = get_conn_lockless(response->qp_num); + if (conn && conn->is_connected()) + conn->fault(); + } + get_stack()->get_infiniband().post_chunk_to_pool(chunk); + perf_logger->dec(l_msgr_rdma_rx_bufs_in_use); + } + } + for (auto &&i : polled) + i.first->pass_wc(std::move(i.second)); + polled.clear(); + } + + if (!tx_ret && !rx_ret) { + // NOTE: Has TX just transitioned to idle? We should do it when idle! + // It's now safe to delete queue pairs (see comment by declaration + // for dead_queue_pairs). + // Additionally, don't delete qp while outstanding_buffers isn't empty, + // because we need to check qp's state before sending + perf_logger->set(l_msgr_rdma_inflight_tx_chunks, inflight); + if (num_dead_queue_pair) { + Mutex::Locker l(lock); // FIXME reuse dead qp because creating one qp costs 1 ms + auto it = dead_queue_pairs.begin(); + while (it != dead_queue_pairs.end()) { + auto i = *it; + // Bypass QPs that do not collect all Tx completions yet. + if (i->get_tx_wr()) { + ldout(cct, 20) << __func__ << " bypass qp=" << i << " tx_wr=" << i->get_tx_wr() << dendl; + ++it; + } else { + ldout(cct, 10) << __func__ << " finally delete qp=" << i << dendl; + delete i; + it = dead_queue_pairs.erase(it); + perf_logger->dec(l_msgr_rdma_active_queue_pair); + --num_dead_queue_pair; + } + } + } + if (!num_qp_conn && done && dead_queue_pairs.empty()) + break; + + uint64_t now = Cycles::rdtsc(); + if (Cycles::to_microseconds(now - last_inactive) > cct->_conf->ms_async_rdma_polling_us) { + handle_async_event(); + if (!rearmed) { + // Clean up cq events after rearm notify ensure no new incoming event + // arrived between polling and rearm + tx_cq->rearm_notify(); + rx_cq->rearm_notify(); + rearmed = true; + continue; + } + + struct pollfd channel_poll[2]; + channel_poll[0].fd = tx_cc->get_fd(); + channel_poll[0].events = POLLIN | POLLERR | POLLNVAL | POLLHUP; + channel_poll[0].revents = 0; + channel_poll[1].fd = rx_cc->get_fd(); + channel_poll[1].events = POLLIN | POLLERR | POLLNVAL | POLLHUP; + channel_poll[1].revents = 0; + r = 0; + perf_logger->set(l_msgr_rdma_polling, 0); + while (!done && r == 0) { + r = TEMP_FAILURE_RETRY(poll(channel_poll, 2, 100)); + if (r < 0) { + r = -errno; + lderr(cct) << __func__ << " poll failed " << r << dendl; + ceph_abort(); + } + } + if (r > 0 && tx_cc->get_cq_event()) + ldout(cct, 20) << __func__ << " got tx cq event." << dendl; + if (r > 0 && rx_cc->get_cq_event()) + ldout(cct, 20) << __func__ << " got rx cq event." << dendl; + last_inactive = Cycles::rdtsc(); + perf_logger->set(l_msgr_rdma_polling, 1); + rearmed = false; + } + } + } +} + +void RDMADispatcher::notify_pending_workers() { + if (num_pending_workers) { + RDMAWorker *w = nullptr; + { + Mutex::Locker l(w_lock); + if (!pending_workers.empty()) { + w = pending_workers.front(); + pending_workers.pop_front(); + --num_pending_workers; + } + } + if (w) + w->notify_worker(); + } +} + +void RDMADispatcher::register_qp(QueuePair *qp, RDMAConnectedSocketImpl* csi) +{ + Mutex::Locker l(lock); + ceph_assert(!qp_conns.count(qp->get_local_qp_number())); + qp_conns[qp->get_local_qp_number()] = std::make_pair(qp, csi); + ++num_qp_conn; +} + +RDMAConnectedSocketImpl* RDMADispatcher::get_conn_lockless(uint32_t qp) +{ + auto it = qp_conns.find(qp); + if (it == qp_conns.end()) + return nullptr; + if (it->second.first->is_dead()) + return nullptr; + return it->second.second; +} + +Infiniband::QueuePair* RDMADispatcher::get_qp(uint32_t qp) +{ + Mutex::Locker l(lock); + // Try to find the QP in qp_conns firstly. + auto it = qp_conns.find(qp); + if (it != qp_conns.end()) + return it->second.first; + + // Try again in dead_queue_pairs. + for (auto &i: dead_queue_pairs) + if (i->get_local_qp_number() == qp) + return i; + + return nullptr; +} + +void RDMADispatcher::erase_qpn_lockless(uint32_t qpn) +{ + auto it = qp_conns.find(qpn); + if (it == qp_conns.end()) + return ; + ++num_dead_queue_pair; + dead_queue_pairs.push_back(it->second.first); + qp_conns.erase(it); + --num_qp_conn; +} + +void RDMADispatcher::erase_qpn(uint32_t qpn) +{ + Mutex::Locker l(lock); + erase_qpn_lockless(qpn); +} + +void RDMADispatcher::handle_tx_event(ibv_wc *cqe, int n) +{ + std::vector<Chunk*> tx_chunks; + + for (int i = 0; i < n; ++i) { + ibv_wc* response = &cqe[i]; + Chunk* chunk = reinterpret_cast<Chunk *>(response->wr_id); + ldout(cct, 25) << __func__ << " QP: " << response->qp_num + << " len: " << response->byte_len << " , addr:" << chunk + << " " << get_stack()->get_infiniband().wc_status_to_string(response->status) << dendl; + + QueuePair *qp = get_qp(response->qp_num); + if (qp) + qp->dec_tx_wr(1); + + if (response->status != IBV_WC_SUCCESS) { + perf_logger->inc(l_msgr_rdma_tx_total_wc_errors); + if (response->status == IBV_WC_RETRY_EXC_ERR) { + ldout(cct, 1) << __func__ << " connection between server and client not working. Disconnect this now" << dendl; + perf_logger->inc(l_msgr_rdma_tx_wc_retry_errors); + } else if (response->status == IBV_WC_WR_FLUSH_ERR) { + ldout(cct, 1) << __func__ << " Work Request Flushed Error: this connection's qp=" + << response->qp_num << " should be down while this WR=" << response->wr_id + << " still in flight." << dendl; + perf_logger->inc(l_msgr_rdma_tx_wc_wr_flush_errors); + } else { + ldout(cct, 1) << __func__ << " send work request returned error for buffer(" + << response->wr_id << ") status(" << response->status << "): " + << get_stack()->get_infiniband().wc_status_to_string(response->status) << dendl; + Mutex::Locker l(lock);//make sure connected socket alive when pass wc + RDMAConnectedSocketImpl *conn = get_conn_lockless(response->qp_num); + + if (conn && conn->is_connected()) { + ldout(cct, 25) << __func__ << " qp state is : " << conn->get_qp_state() << dendl; + conn->fault(); + } else { + ldout(cct, 1) << __func__ << " missing qp_num=" << response->qp_num << " discard event" << dendl; + } + } + } + + //TX completion may come either from regular send message or from 'fin' message. + //In the case of 'fin' wr_id points to the QueuePair. + if (get_stack()->get_infiniband().get_memory_manager()->is_tx_buffer(chunk->buffer)) { + tx_chunks.push_back(chunk); + } else if (reinterpret_cast<QueuePair*>(response->wr_id)->get_local_qp_number() == response->qp_num ) { + ldout(cct, 1) << __func__ << " sending of the disconnect msg completed" << dendl; + } else { + ldout(cct, 1) << __func__ << " not tx buffer, chunk " << chunk << dendl; + ceph_abort(); + } + } + + perf_logger->inc(l_msgr_rdma_tx_total_wc, n); + post_tx_buffer(tx_chunks); +} + +/** + * Add the given Chunks to the given free queue. + * + * \param[in] chunks + * The Chunks to enqueue. + * \return + * 0 if success or -1 for failure + */ +void RDMADispatcher::post_tx_buffer(std::vector<Chunk*> &chunks) +{ + if (chunks.empty()) + return ; + + inflight -= chunks.size(); + get_stack()->get_infiniband().get_memory_manager()->return_tx(chunks); + ldout(cct, 30) << __func__ << " release " << chunks.size() + << " chunks, inflight " << inflight << dendl; + notify_pending_workers(); +} + + +RDMAWorker::RDMAWorker(CephContext *c, unsigned i) + : Worker(c, i), stack(nullptr), + tx_handler(new C_handle_cq_tx(this)), lock("RDMAWorker::lock") +{ + // initialize perf_logger + char name[128]; + sprintf(name, "AsyncMessenger::RDMAWorker-%u", id); + PerfCountersBuilder plb(cct, name, l_msgr_rdma_first, l_msgr_rdma_last); + + plb.add_u64_counter(l_msgr_rdma_tx_no_mem, "tx_no_mem", "The count of no tx buffer"); + plb.add_u64_counter(l_msgr_rdma_tx_parital_mem, "tx_parital_mem", "The count of parital tx buffer"); + plb.add_u64_counter(l_msgr_rdma_tx_failed, "tx_failed_post", "The number of tx failed posted"); + + plb.add_u64_counter(l_msgr_rdma_tx_chunks, "tx_chunks", "The number of tx chunks transmitted"); + plb.add_u64_counter(l_msgr_rdma_tx_bytes, "tx_bytes", "The bytes of tx chunks transmitted", NULL, 0, unit_t(UNIT_BYTES)); + plb.add_u64_counter(l_msgr_rdma_rx_chunks, "rx_chunks", "The number of rx chunks transmitted"); + plb.add_u64_counter(l_msgr_rdma_rx_bytes, "rx_bytes", "The bytes of rx chunks transmitted", NULL, 0, unit_t(UNIT_BYTES)); + plb.add_u64_counter(l_msgr_rdma_pending_sent_conns, "pending_sent_conns", "The count of pending sent conns"); + + perf_logger = plb.create_perf_counters(); + cct->get_perfcounters_collection()->add(perf_logger); +} + +RDMAWorker::~RDMAWorker() +{ + delete tx_handler; +} + +void RDMAWorker::initialize() +{ + if (!dispatcher) { + dispatcher = &stack->get_dispatcher(); + } +} + +int RDMAWorker::listen(entity_addr_t &sa, unsigned addr_slot, + const SocketOptions &opt,ServerSocket *sock) +{ + get_stack()->get_infiniband().init(); + dispatcher->polling_start(); + RDMAServerSocketImpl *p; + if (cct->_conf->ms_async_rdma_type == "iwarp") { + p = new RDMAIWARPServerSocketImpl( + cct, &get_stack()->get_infiniband(), &get_stack()->get_dispatcher(), this, + sa, addr_slot); + } else { + p = new RDMAServerSocketImpl(cct, &get_stack()->get_infiniband(), + &get_stack()->get_dispatcher(), this, sa, + addr_slot); + } + int r = p->listen(sa, opt); + if (r < 0) { + delete p; + return r; + } + + *sock = ServerSocket(std::unique_ptr<ServerSocketImpl>(p)); + return 0; +} + +int RDMAWorker::connect(const entity_addr_t &addr, const SocketOptions &opts, ConnectedSocket *socket) +{ + get_stack()->get_infiniband().init(); + dispatcher->polling_start(); + + RDMAConnectedSocketImpl* p; + if (cct->_conf->ms_async_rdma_type == "iwarp") { + p = new RDMAIWARPConnectedSocketImpl(cct, &get_stack()->get_infiniband(), &get_stack()->get_dispatcher(), this); + } else { + p = new RDMAConnectedSocketImpl(cct, &get_stack()->get_infiniband(), &get_stack()->get_dispatcher(), this); + } + int r = p->try_connect(addr, opts); + + if (r < 0) { + ldout(cct, 1) << __func__ << " try connecting failed." << dendl; + delete p; + return r; + } + std::unique_ptr<RDMAConnectedSocketImpl> csi(p); + *socket = ConnectedSocket(std::move(csi)); + return 0; +} + +int RDMAWorker::get_reged_mem(RDMAConnectedSocketImpl *o, std::vector<Chunk*> &c, size_t bytes) +{ + ceph_assert(center.in_thread()); + int r = get_stack()->get_infiniband().get_tx_buffers(c, bytes); + ceph_assert(r >= 0); + size_t got = get_stack()->get_infiniband().get_memory_manager()->get_tx_buffer_size() * r; + ldout(cct, 30) << __func__ << " need " << bytes << " bytes, reserve " << got << " registered bytes, inflight " << dispatcher->inflight << dendl; + stack->get_dispatcher().inflight += r; + if (got >= bytes) + return r; + + if (o) { + if (!o->is_pending()) { + pending_sent_conns.push_back(o); + perf_logger->inc(l_msgr_rdma_pending_sent_conns, 1); + o->set_pending(1); + } + dispatcher->make_pending_worker(this); + } + return r; +} + + +void RDMAWorker::handle_pending_message() +{ + ldout(cct, 20) << __func__ << " pending conns " << pending_sent_conns.size() << dendl; + while (!pending_sent_conns.empty()) { + RDMAConnectedSocketImpl *o = pending_sent_conns.front(); + pending_sent_conns.pop_front(); + ssize_t r = o->submit(false); + ldout(cct, 20) << __func__ << " sent pending bl socket=" << o << " r=" << r << dendl; + if (r < 0) { + if (r == -EAGAIN) { + pending_sent_conns.push_back(o); + dispatcher->make_pending_worker(this); + return ; + } + o->fault(); + } + o->set_pending(0); + perf_logger->dec(l_msgr_rdma_pending_sent_conns, 1); + } + dispatcher->notify_pending_workers(); +} + +RDMAStack::RDMAStack(CephContext *cct, const string &t) + : NetworkStack(cct, t), ib(cct), dispatcher(cct, this) +{ + ldout(cct, 20) << __func__ << " constructing RDMAStack..." << dendl; + + unsigned num = get_num_worker(); + for (unsigned i = 0; i < num; ++i) { + RDMAWorker* w = dynamic_cast<RDMAWorker*>(get_worker(i)); + w->set_stack(this); + } + ldout(cct, 20) << " creating RDMAStack:" << this << " with dispatcher:" << &dispatcher << dendl; +} + +RDMAStack::~RDMAStack() +{ + if (cct->_conf->ms_async_rdma_enable_hugepage) { + unsetenv("RDMAV_HUGEPAGES_SAFE"); //remove env variable on destruction + } +} + +void RDMAStack::spawn_worker(unsigned i, std::function<void ()> &&func) +{ + threads.resize(i+1); + threads[i] = std::thread(func); +} + +void RDMAStack::join_worker(unsigned i) +{ + ceph_assert(threads.size() > i && threads[i].joinable()); + threads[i].join(); +} |