From 3c608bf76535dc1f08a9563b417b5c6fadeab3ff Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Wed, 9 May 2007 18:20:24 -0400 Subject: add a backoff algorithm when nacks are received by devices add seperate response buffers and request queue sizes in bus bridge add delay to respond to a nack in the bus bridge src/dev/i8254xGBe.cc: src/dev/ide_ctrl.cc: src/dev/ns_gige.cc: src/dev/pcidev.hh: src/dev/sinic.cc: add backoff delay parameters src/dev/io_device.cc: src/dev/io_device.hh: add a backoff algorithm when nacks are received. src/mem/bridge.cc: src/mem/bridge.hh: add seperate response buffers and request queue sizes add a new parameters to specify how long before a nack in ready to go after a packet that needs to be nacked is received src/mem/cache/cache_impl.hh: assert on the src/mem/tport.cc: add a friendly assert to make sure the packet was inserted into the list --HG-- extra : convert_revision : 3595ad932015a4ce2bb72772da7850ad91bd09b1 --- src/mem/cache/cache_impl.hh | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'src/mem/cache') diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index 0a528aa5d..c70f10151 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -1192,6 +1192,8 @@ template bool Cache::CpuSidePort::recvTiming(PacketPtr pkt) { + assert(pkt->result != Packet::Nacked); + if (!pkt->req->isUncacheable() && pkt->isInvalidate() && !pkt->isRead() && !pkt->isWrite()) { @@ -1249,6 +1251,12 @@ template bool Cache::MemSidePort::recvTiming(PacketPtr pkt) { + // this needs to be fixed so that the cache updates the mshr and sends the + // packet back out on the link, but it probably won't happen so until this + // gets fixed, just panic when it does + if (pkt->result == Packet::Nacked) + panic("Need to implement cache resending nacked packets!\n"); + if (pkt->isRequest() && blocked) { DPRINTF(Cache,"Scheduling a retry while blocked\n"); -- cgit v1.2.3