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author | Gabor Dozsa <gabor.dozsa@arm.com> | 2016-01-07 16:33:47 -0600 |
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committer | Gabor Dozsa <gabor.dozsa@arm.com> | 2016-01-07 16:33:47 -0600 |
commit | 5dec4e07b89786aa67ce64aadeeb14c81b3977b3 (patch) | |
tree | 44535119ad1f458cbe2a26b56c8c8377a25fe0ff /src/dev/net/dist_packet.hh | |
parent | e67749426054d8ddb7f11b53a89741d4808f3acb (diff) | |
download | gem5-5dec4e07b89786aa67ce64aadeeb14c81b3977b3.tar.xz |
dev: Distributed Ethernet link for distributed gem5 simulations
Distributed gem5 (abbreviated dist-gem5) is the result of the
convergence effort between multi-gem5 and pd-gem5 (from Univ. of
Wisconsin). It relies on the base multi-gem5 infrastructure for packet
forwarding, synchronisation and checkpointing but combines those with
the elaborated network switch model from pd-gem5.
--HG--
rename : src/dev/net/multi_etherlink.cc => src/dev/net/dist_etherlink.cc
rename : src/dev/net/multi_etherlink.hh => src/dev/net/dist_etherlink.hh
rename : src/dev/net/multi_iface.cc => src/dev/net/dist_iface.cc
rename : src/dev/net/multi_iface.hh => src/dev/net/dist_iface.hh
rename : src/dev/net/multi_packet.hh => src/dev/net/dist_packet.hh
Diffstat (limited to 'src/dev/net/dist_packet.hh')
-rw-r--r-- | src/dev/net/dist_packet.hh | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/dev/net/dist_packet.hh b/src/dev/net/dist_packet.hh new file mode 100644 index 000000000..4c079c44a --- /dev/null +++ b/src/dev/net/dist_packet.hh @@ -0,0 +1,106 @@ +/* + * Copyright (c) 2015 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Gabor Dozsa + */ + +/* @file + * Header packet class for dist-gem5 runs. + * + * For a high level description about dist-gem5 see comments in + * header file dist_iface.hh. + * + * The DistHeaderPkt class defines the format of message headers + * sent among gem5 processes during a dist gem5 simulation. A header packet + * can either carry the description of data packet (i.e. a simulated Ethernet + * packet) or a synchronisation related control command. In case of + * data packet description, the corresponding data packet always follows + * the header packet back-to-back. + */ +#ifndef __DEV_DIST_PACKET_HH__ +#define __DEV_DIST_PACKET_HH__ + +#include <cstring> + +#include "base/types.hh" + +class DistHeaderPkt +{ + private: + DistHeaderPkt() {} + ~DistHeaderPkt() {} + + public: + enum class ReqType { immediate, collective, pending, none }; + /** + * The msg type defines what information a dist header packet carries. + */ + enum class MsgType + { + dataDescriptor, + cmdSyncReq, + cmdSyncAck, + unknown + }; + + struct Header + { + /** + * The msg type field is valid for all header packets. + * + * @note senderRank is used with data packets while collFlags are used + * by sync ack messages to trigger collective ckpt or exit events. + */ + MsgType msgType; + Tick sendTick; + union { + Tick sendDelay; + Tick syncRepeat; + }; + union { + /** + * Actual length of the simulated Ethernet packet. + */ + unsigned dataPacketLength; + struct { + ReqType needCkpt; + ReqType needExit; + }; + }; + }; +}; + +#endif |