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MOESI_CMP_token: Fixed dma persistent lockdown bugs

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This commit is contained in:
Brad Beckmann 2010-08-20 11:46:12 -07:00
parent 808701a10c
commit 9fb4381ddc
1 changed files with 62 additions and 12 deletions
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74
src/mem/protocol/MOESI_CMP_token-dir.sm
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@ -63,6 +63,7 @@ machine(Directory, "Token protocol")
L_O_W, desc="transitioning to Locked, waiting for memory read, could eventually return to O";
L_NO_W, desc="transitioning to Locked, waiting for memory read, eventually return to NO";
DR_L_W, desc="transitioning to Locked underneath a DMA read, waiting for memory data";
DW_L_W, desc="transitioning to Locked underneath a DMA write, waiting for memory ack";
NO_W, desc="transitioning to Not Owner, waiting for memory read";
O_DW_W, desc="transitioning to Owner, waiting for memory before DMA ack";
O_DR_W, desc="transitioning to Owner, waiting for memory before DMA data";
@ -291,13 +292,19 @@ machine(Directory, "Token protocol")
// React to the message based on the current state of the table
if (persistentTable.isLocked(in_msg.Address)) {
trigger(Event:Lockdown, in_msg.Address); // locked
if (persistentTable.findSmallest(in_msg.Address) == machineID) {
trigger(Event:Own_Lock_or_Unlock, in_msg.Address);
} else {
trigger(Event:Lockdown, in_msg.Address); // locked
}
} else {
trigger(Event:Unlockdown, in_msg.Address); // unlocked
}
}
else {
if (in_msg.Type == PersistentRequestType:GETX_PERSISTENT) {
if (persistentTable.findSmallest(in_msg.Address) == machineID) {
trigger(Event:Own_Lock_or_Unlock, in_msg.Address);
} else if (in_msg.Type == PersistentRequestType:GETX_PERSISTENT) {
trigger(Event:Lockdown, in_msg.Address); // locked
} else if (in_msg.Type == PersistentRequestType:GETS_PERSISTENT) {
trigger(Event:Lockdown, in_msg.Address); // locked
@ -685,6 +692,10 @@ machine(Directory, "Token protocol")
}
}
action(aat_assertAllTokens, "aat", desc="assert that we have all tokens") {
assert(getDirectoryEntry(address).Tokens == max_tokens());
}
action(j_popIncomingRequestQueue, "j", desc="Pop incoming request queue") {
requestNetwork_in.dequeue();
}
@ -746,6 +757,16 @@ machine(Directory, "Token protocol")
}
}
action(rs_resetScheduleTimeout, "rs", desc="Reschedule Schedule Timeout") {
//
// currently only support a fixed timeout latency
//
if (reissueTimerTable.isSet(address)) {
reissueTimerTable.unset(address);
reissueTimerTable.set(address, fixed_timeout_latency);
}
}
action(st_scheduleTimeout, "st", desc="Schedule Timeout") {
//
// currently only support a fixed timeout latency
@ -885,6 +906,10 @@ machine(Directory, "Token protocol")
k_popIncomingResponseQueue;
}
transition({O, NO}, Unlockdown) {
l_popIncomingPersistentQueue;
}
//
// transitioning to Owner, waiting for memory before DMA ack
// All other events should recycle/stall
@ -1060,7 +1085,7 @@ machine(Directory, "Token protocol")
j_popIncomingRequestQueue;
}
transition({L, DW_L, DR_L, L_O_W, L_NO_W, DR_L_W}, Lockdown) {
transition({L, DW_L, DR_L, L_O_W, L_NO_W, DR_L_W, DW_L_W}, Lockdown) {
l_popIncomingPersistentQueue;
}
@ -1100,11 +1125,11 @@ machine(Directory, "Token protocol")
l_popMemQueue;
}
transition(L_O_W, {Unlockdown, Own_Lock_or_Unlock}, O_W) {
transition(L_O_W, Unlockdown, O_W) {
l_popIncomingPersistentQueue;
}
transition(L_NO_W, {Unlockdown, Own_Lock_or_Unlock}, NO_W) {
transition(L_NO_W, Unlockdown, NO_W) {
l_popIncomingPersistentQueue;
}
@ -1113,15 +1138,27 @@ machine(Directory, "Token protocol")
l_popMemQueue;
}
transition(DW_L_W, Memory_Ack, L) {
aat_assertAllTokens;
da_sendDmaAck;
s_deallocateTBE;
dd_sendDataWithAllTokensToStarver;
l_popMemQueue;
}
transition(DW_L, {Unlockdown, Own_Lock_or_Unlock}, NO_DW) {
l_popIncomingPersistentQueue;
}
transition(DR_L_W, {Unlockdown, Own_Lock_or_Unlock}, O_DR_W) {
transition(DR_L_W, Unlockdown, O_DR_W) {
l_popIncomingPersistentQueue;
}
transition({DW_L, DR_L_W}, Request_Timeout) {
transition(DW_L_W, Unlockdown, O_DW_W) {
l_popIncomingPersistentQueue;
}
transition({DW_L, DR_L_W, DW_L_W}, Request_Timeout) {
ut_unsetReissueTimer;
px_tryIssuingPersistentGETXRequest;
}
@ -1143,23 +1180,32 @@ machine(Directory, "Token protocol")
l_popMemQueue;
}
transition({O, NO, L, O_DW, NO_DW, NO_DR}, Own_Lock_or_Unlock) {
transition({O, NO, O_DW, NO_DW, NO_DR}, Own_Lock_or_Unlock) {
l_popIncomingPersistentQueue;
}
// Blocked states
transition({NO_W, O_W, L_O_W, L_NO_W, DR_L_W, O_DW_W, O_DR_W, O_DW, NO_DW, NO_DR}, {GETX, GETS}) {
transition({NO_W, O_W, L_O_W, L_NO_W, DR_L_W, DW_L_W, O_DW_W, O_DR_W, O_DW, NO_DW, NO_DR}, {GETX, GETS}) {
z_recycleRequest;
}
transition({NO_W, O_W, L_O_W, L_NO_W, DR_L_W, O_DW_W, O_DR_W, O_DW, NO_DW, NO_DR, L, DW_L, DR_L}, {DMA_READ, DMA_WRITE}) {
transition({NO_W, O_W, L_O_W, L_NO_W, DR_L_W, DW_L_W, O_DW_W, O_DR_W, O_DW, NO_DW, NO_DR, L, DW_L, DR_L}, {DMA_READ, DMA_WRITE, DMA_WRITE_All_Tokens}) {
y_recycleDmaRequestQueue;
}
transition({NO_W, O_W, L_O_W, L_NO_W, DR_L_W, O_DW_W, O_DR_W}, {Data_Owner, Ack_Owner, Tokens, Ack_All_Tokens}) {
transition({NO_W, O_W, L_O_W, L_NO_W, DR_L_W, DW_L_W, O_DW_W, O_DR_W}, {Data_Owner, Ack_Owner, Tokens, Ack_All_Tokens}) {
kz_recycleResponse;
}
//
// If we receive a request timeout while waiting for memory, it is likely that
// the request will be satisfied and issuing a presistent request will do us
// no good. Just wait.
//
transition({O_DW_W, O_DR_W}, Request_Timeout) {
rs_resetScheduleTimeout;
}
transition(NO_W, Lockdown, L_NO_W) {
l_popIncomingPersistentQueue;
}
@ -1172,7 +1218,11 @@ machine(Directory, "Token protocol")
l_popIncomingPersistentQueue;
}
transition({NO_W, O_W, O_DR_W}, {Unlockdown, Own_Lock_or_Unlock}) {
transition(O_DW_W, Lockdown, DW_L_W) {
l_popIncomingPersistentQueue;
}
transition({NO_W, O_W, O_DR_W, O_DW_W}, {Unlockdown, Own_Lock_or_Unlock}) {
l_popIncomingPersistentQueue;
}
}