From fc5bf6713f191047e07f33a788d099b2bbd9faf4 Mon Sep 17 00:00:00 2001 From: Gabor Dozsa Date: Wed, 15 Jul 2015 19:53:50 -0500 Subject: dev: add support for multi gem5 runs Multi gem5 is an extension to gem5 to enable parallel simulation of a distributed system (e.g. simulation of a pool of machines connected by Ethernet links). A multi gem5 run consists of seperate gem5 processes running in parallel (potentially on different hosts/slots on a cluster). Each gem5 process executes the simulation of a component of the simulated distributed system (e.g. a multi-core board with an Ethernet NIC). The patch implements the "distributed" Ethernet link device (dev/src/multi_etherlink.[hh.cc]). This device will send/receive (simulated) Ethernet packets to/from peer gem5 processes. The interface to talk to the peer gem5 processes is defined in dev/src/multi_iface.hh and in tcp_iface.hh. There is also a central message server process (util/multi/tcp_server.[hh,cc]) which acts like an Ethernet switch and transfers messages among the gem5 peers. A multi gem5 simulations can be kicked off by the util/multi/gem5-multi.sh wrapper script. Checkpoints are supported by multi-gem5. The checkpoint must be initiated by a single gem5 process. E.g., the gem5 process with rank 0 can take a checkpoint from the bootscript just before it invokes 'mpirun' to launch an MPI test. The message server process will notify all the other peer gem5 processes and make them take a checkpoint, too (after completing a global synchronisation to ensure that there are no inflight messages among gem5). --- src/dev/SConscript | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/dev/SConscript') diff --git a/src/dev/SConscript b/src/dev/SConscript index 416e5052f..3936210a6 100644 --- a/src/dev/SConscript +++ b/src/dev/SConscript @@ -60,6 +60,10 @@ Source('etherdevice.cc') Source('etherdump.cc') Source('etherint.cc') Source('etherlink.cc') +Source('multi_packet.cc') +Source('multi_iface.cc') +Source('multi_etherlink.cc') +Source('tcp_iface.cc') Source('etherpkt.cc') Source('ethertap.cc') Source('i2cbus.cc') @@ -85,6 +89,8 @@ DebugFlag('DiskImageWrite') DebugFlag('DMA') DebugFlag('DMACopyEngine') DebugFlag('Ethernet') +DebugFlag('MultiEthernet') +DebugFlag('MultiEthernetPkt') DebugFlag('EthernetCksum') DebugFlag('EthernetDMA') DebugFlag('EthernetData') -- cgit v1.2.3