From dc16c1ceb806135dddb8c79ef4d5ecf1336f21bc Mon Sep 17 00:00:00 2001 From: Michael LeBeane Date: Wed, 26 Oct 2016 22:48:40 -0400 Subject: dev: Add m5 op to toggle synchronization for dist-gem5. This patch adds the ability for an application to request dist-gem5 to begin/ end synchronization using an m5 op. When toggling on sync, all nodes agree on the next sync point based on the maximum of all nodes' ticks. CPUs are suspended until the sync point to avoid sending network messages until sync has been enabled. Toggling off sync acts like a global execution barrier, where all CPUs are disabled until every node reaches the toggle off point. This avoids tricky situations such as one node hitting a toggle off followed by a toggle on before the other nodes hit the first toggle off. --- src/sim/pseudo_inst.hh | 1 + 1 file changed, 1 insertion(+) (limited to 'src/sim/pseudo_inst.hh') diff --git a/src/sim/pseudo_inst.hh b/src/sim/pseudo_inst.hh index 5f0b700c6..d9b981f94 100644 --- a/src/sim/pseudo_inst.hh +++ b/src/sim/pseudo_inst.hh @@ -88,6 +88,7 @@ void debugbreak(ThreadContext *tc); void switchcpu(ThreadContext *tc); void workbegin(ThreadContext *tc, uint64_t workid, uint64_t threadid); void workend(ThreadContext *tc, uint64_t workid, uint64_t threadid); +void togglesync(ThreadContext *tc); } // namespace PseudoInst -- cgit v1.2.3