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This adds the derived class FunctionalPacket to fix a long standing
deficiency in the Packet class where it was unable to handle finding data to
partially satisfy a functional access. Made this a derived class as
functional accesses are used only in certain contexts and to not add any
additional overhead to the existing Packet class.
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This patch rpovides functional access support in Ruby. Currently only
the M5Port of RubyPort supports functional accesses. The support for
functional through the PioPort will be added as a separate patch.
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The packet now identifies whether static or dynamic data has been allocated and
is used by Ruby to determine whehter to copy the data pointer into the ruby
request. Subsequently, Ruby can be told not to update phys memory when
receiving packets.
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This step makes it easy to replace the accessor functions
(which still access a global variable) with ones that access
per-thread curTick values.
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If we write back an exclusive copy, we now mark it
as such, so the cache receiving the writeback can
mark its copy as exclusive. This avoids some
unnecessary upgrade requests when a cache later
tries to re-acquire exclusive access to the block.
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Corrects an oversight in cset f97b62be544f. The fix there only
failed queued SCUpgradeReq packets that encountered an
invalidation, which meant that the upgrade had to reach the L2
cache. To handle pending requests in the L1 we must similarly
fail StoreCondReq packets too.
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Added support so that ruby can determine the outcome of store conditional
operations and reflect that outcome to M5 physical memory and cpus.
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Requires new "SCUpgradeReq" message that marks upgrades
for store conditionals, so downstream caches can fail
these when they run into invalidations.
See http://www.m5sim.org/flyspray/task/197
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Only set the dirty bit when we actually write to a block
(not if we thought we might but didn't, as in a failed
SC or CAS). This requires makeing sure the dirty bit
stays set when we get an exclusive (writable) copy
in a cache-to-cache transfer from another owner, which
n turn requires copying the mem-inhibit flag from
timing-mode requests to their associated responses.
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--HG--
rename : src/sim/host.hh => src/base/types.hh
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This frees up needed space for more public flags. Also:
- remove unused Request accessor methods
- make Packet use public Request accessors, so it need not be a friend
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I did some of the flags and assertions wrong. Thanks to Brad Beckmann
for pointing this out. I should have run the opt regressions instead
of the fast. I also screwed up some of the logical functions in the Flags
class.
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memory range.
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when the Packet is deleted, since the requester
can't possibly do it.
--HG--
extra : convert_revision : 8571b144ecb3c70efc06d09faa8b3161fb58352d
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--HG--
extra : convert_revision : 02775cfb460afe6df0df0938c62cccd93a71e775
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where we defer a response to a read from a far-away cache A, then later
defer a ReadExcl from a cache B on the same bus as us. We'll assert
MemInhibit in both cases, but in the latter case MemInhibit will keep
the invalidation from reaching cache A. This special response tells
cache A that it gets the block to satisfy its read, but must immediately
invalidate it.
--HG--
extra : convert_revision : f85c8b47bb30232da37ac861b50a6539dc81161b
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--HG--
extra : convert_revision : 7eadf9b7db8c0289480f771271b6efe2400006d4
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--HG--
extra : convert_revision : 73b753e57c355b7e6873f047ddc8cb371c3136b7
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--HG--
extra : convert_revision : cc73b9aaf73e9dacf52f3350fa591e67ca4ccee6
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--HG--
extra : convert_revision : f0a2947ccc49e0d18bc17a59371fa396d9ebd6c0
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--HG--
extra : convert_revision : 4916fa9721d727d8416ad8c07df3a8171d02b2b4
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based on following Packet senderState links.
--HG--
extra : convert_revision : 9027d59bd7242aa0e4275bf94d8b1fb27bd59d79
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Turns out DeferredSnoop isn't quite the right bit of info
we needed... see new comment in cache_impl.hh.
--HG--
extra : convert_revision : a38de8c1677a37acafb743b7074ef88b21d3b7be
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- Add "deferred snoop" flag to Packet so upper-level caches
can distinguish whether lower-level cache request was
in-service or not at the time of the original snoop.
- Revamp response handling to properly handle deferred snoops
on non-cache-fill requests (i.e. upgrades).
- Make sure forwarded writebacks are kept in write buffer at
lower-level caches so they get snooped properly.
--HG--
extra : convert_revision : 17f8a3772a1ae31a16991a53f8225ddf54d31fc9
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Atomic mode seems to work. Timing is closer but not there yet.
--HG--
extra : convert_revision : 0dea5c3d4b973d009e9d4a4c21b9cad15961d56f
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--HG--
extra : convert_revision : 2fcf99f050d73e007433c1db2475f2893c5961a0
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Handled by Packet::checkFunctional() now.
--HG--
extra : convert_revision : 63642254e2789c80a369ac269f317ec054ffe3c0
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now encoded in cmd field.
--HG--
extra : convert_revision : d67819b7e3ee4b9a5bf08541104de0a89485e90b
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src/cpu/memtest/memtest.cc:
Need to set packet source field so that response from cache
doesn't run into assertion failure when copying source to dest.
src/mem/packet.hh:
Copy source field when copying packets.
Assert that source is valid before copying it to dest
when turning packets around.
--HG--
extra : convert_revision : 09e3cfda424aa89fe170e21e955b295746832bf8
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into vm1.(none):/home/stever/bk/newmem-cache2
--HG--
extra : convert_revision : 9002940097a166c8442ae1adf41b974227968920
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configs/example/memtest.py:
Add progress interval option.
src/base/traceflags.py:
Add MemTest flag.
src/cpu/memtest/memtest.cc:
Clean up tracing.
src/cpu/memtest/memtest.hh:
Get rid of unused code.
--HG--
extra : convert_revision : 92bd8241a6c90bfb6d908e5a5132cbdb500cbb87
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don't spend so much time calling malloc()
--HG--
extra : convert_revision : a946564eee46ed7d2aed41c32d488ca7f036c32f
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timing mode still broken.
configs/example/memtest.py:
Revamp options.
src/cpu/memtest/memtest.cc:
No need for memory initialization.
No need to make atomic response... memory system should do that now.
src/cpu/memtest/memtest.hh:
MemTest really doesn't want to snoop.
src/mem/bridge.cc:
checkFunctional() cleanup.
src/mem/bus.cc:
src/mem/bus.hh:
src/mem/cache/base_cache.cc:
src/mem/cache/base_cache.hh:
src/mem/cache/cache.cc:
src/mem/cache/cache.hh:
src/mem/cache/cache_blk.hh:
src/mem/cache/cache_builder.cc:
src/mem/cache/cache_impl.hh:
src/mem/cache/coherence/coherence_protocol.cc:
src/mem/cache/coherence/coherence_protocol.hh:
src/mem/cache/coherence/simple_coherence.hh:
src/mem/cache/miss/SConscript:
src/mem/cache/miss/mshr.cc:
src/mem/cache/miss/mshr.hh:
src/mem/cache/miss/mshr_queue.cc:
src/mem/cache/miss/mshr_queue.hh:
src/mem/cache/prefetch/base_prefetcher.cc:
src/mem/cache/tags/fa_lru.cc:
src/mem/cache/tags/fa_lru.hh:
src/mem/cache/tags/iic.cc:
src/mem/cache/tags/iic.hh:
src/mem/cache/tags/lru.cc:
src/mem/cache/tags/lru.hh:
src/mem/cache/tags/split.cc:
src/mem/cache/tags/split.hh:
src/mem/cache/tags/split_lifo.cc:
src/mem/cache/tags/split_lifo.hh:
src/mem/cache/tags/split_lru.cc:
src/mem/cache/tags/split_lru.hh:
src/mem/packet.cc:
src/mem/packet.hh:
src/mem/physical.cc:
src/mem/physical.hh:
src/mem/tport.cc:
More major reorg. Seems to work for atomic mode now,
timing mode still broken.
--HG--
extra : convert_revision : 7e70dfc4a752393b911880ff028271433855ae87
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into vm1.(none):/home/stever/bk/newmem-cache2
--HG--
extra : convert_revision : 6f462916cb0eb309b6799e94fbf07629abb50eba
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--HG--
extra : convert_revision : 24c00ec4904d9fb4d6e39521e0ff8b8f60d60f6a
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src/mem/cache/cache_impl.hh:
src/mem/cache/coherence/simple_coherence.hh:
Get rid of old invalidate propagation logic in preparation
for new multilevel snoop protocol.
src/mem/cache/coherence/coherence_protocol.cc:
L2 cache now has protocol, so protocol must handle ReadExReq
coming in from the CPU side.
src/mem/cache/miss/mshr_queue.cc:
Assertion is failing, so let's take it out for now.
src/mem/packet.cc:
src/mem/packet.hh:
Add WritebackAck command.
Reorganize enum to put responses next to corresponding requests.
Get rid of unused WriteReqNoAck.
--HG--
extra : convert_revision : 24c519846d161978123f9aa029ae358a41546c73
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