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e83f937cc1
Previously, quic_connection_id were stored in a per-thread tree list. Datagram were first dispatched to the correct thread using the encoded TID before a tree lookup was done. Remove these trees and replace it with a global trees list of 256 entries. A CID is using the list index corresponding to its first byte. On datagram dispatch, CID is lookup on its tree and TID is retrieved using new member quic_connection_id.tid. As such, a read-write lock protects each list instances. With 256 entries, it is expected that contention should be reduced. A new structure quic_cid_tree served as a tree container associated with its read-write lock. An API is implemented to ensure lock safety for insert/lookup/delete operation. This patch is a step forward to be able to break the affinity between a CID and a TID encoded thread. This is required to be able to migrate a quic_conn after accept to select thread based on their load. This should be backported up to 2.7 after a period of observation.
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/*
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* AF_INET/AF_INET6 QUIC protocol layer definitions.
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*
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* Copyright 2020 Frederic Lecaille <flecaille@haproxy.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_PROTO_QUIC_H
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#define _HAPROXY_PROTO_QUIC_H
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extern struct protocol proto_quic4;
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extern struct protocol proto_quic6;
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struct quic_cid_tree {
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struct eb_root root;
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__decl_thread(HA_RWLOCK_T lock);
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};
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extern struct quic_dghdlr *quic_dghdlrs;
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extern struct quic_cid_tree *quic_cid_trees;
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#endif /* _HAPROXY_PROTO_QUIC_H */
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