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into dev-traces
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This reverts commit 9c9b1341613e767f306b2b73b5b8a5317b6ee563.
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Signed-off-by: Mengchi Zhang <[email protected]>
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warnings). This makes these consistent.
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1- REEAD/WERITE buffer for DRAM
2- Fixing FETCH_ON_WRITE cahce policy bug
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https://github.rcac.purdue.edu/abdallm/gpgpu-sim_distribution into dev-purdue-integration
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[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 15760]
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//depot/gpgpu_sim_research/fermi_power/distribution/...
to //depot/gpgpu_sim_research/fermi/distribution/...
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 14723]
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replication, implemented write allocate / write back policies in L2 cache, added configurable parameters in gpgpusim.config ("W" = Write Allocate, "N" = No write allocate -> "P" = Private, "S" = shared), modified the cache configuration lines to always be separated by ":" instead of ":" and ",", and modified L1 and L2 data cache to be "Write Back" caches instead of "Read Only".
Still need to implement Ahmed's sectored cache implementation.
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 14081]
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explicit string/enum dependency. Removes a bug when doing debug priting caused by walking off the end of the named list because someone forgot to update the string array
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 11143]
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[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 10754]
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[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 9872]
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[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 9687]
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[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 8154]
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stalling to send four requests per warp into L1T tag lookup.
If L1T is really 32B blocks (as per Henry's paper), this suggests
banking of L1T needs to be modeled.
Other changes:
1. bug fix in memory access generation for texture/const cache access
2. adding back memory latency measurement for visualizer
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7913]
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passing CUDA 3.1 and ptxplus correlation, but correlation still bad (0.62)...
after debugging 1 to get it working with ptxplus, problem is very clear:
shared and constant cache accesses not occuring for operations that combine these with ALU operations.
TODO:
have a "read-operands" stage, which somehow combines operand collector
register reading with shared and const memory accesses...
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7895]
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passing CUDA 3.1 regression
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7886]
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- read only cache model with integrated mshrs (no L1D, yet); new
cache interface should be easily extendable to support texture
cache with latency fifo and separate tag/data arrays, though
this is not yet added (currently tags and data arrays are not
decoupled for texture)
- new partition model using the above
removes all old MSHRs, L1D etc...
passing CUDA 3.1 regression
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7875]
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2. moving DRAM timing parameters into memory_config class
3. removing some likely useless statistics
4. other cleaning up of code
passing CUDA 3.1 regression
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7868]
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this gives us a place to stick caches shared among shader cores but
on the shader side of the interconnect... maybe move the clock
boundary code here? after integrating booksim 2 code?
2. added a pending write table to ldst_unit rather than scoreboard
... rationale is that ld/st unit needs to process register writes
once it is done it can notify scoreboard once.
3. re-enabled shared memory delay (use pipeline within ldst_unit)
4. re-enabling operand collector writeback for all instruction types
5. disable MSHRs in this change list
passing CUDA 3.1 regression
next? texture cache, then redo mshrs?
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7845]
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2. refactor memory stage into a ld/st function unit
3. refactor memory access generation (moved into warp_inst_t class)
the above should make supporting fermi uarch much easier
passing CUDA 3.1 regression
still need to...
(a) update scoreboard to keep count of outstanding memory requests
and use operand collector for writebacks into register file
(b) add back shared memory pipeline delay
(c) remove use of MSHR's for non-cached global/local accesses
(d) replace texture cache with a split tag/data array pipe
(e) re-implement memory_partition stuff so it makes more sense
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7844]
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refactoring: create warp_inst_t that provides notion of a group of scalar instructions
traveling down the pipeline.
delete DWF
delete MIMD
delete warp_tracker
delete old writeback stage, replace it with a stub that just writes back everything
delete old pipeline model
current status: MSHR's need to change to deal with the new structure
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7814]
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cache)
2. update gpgpusim.config for Quadro to use L1 cache geometry from Henry's ISPASS paper
3. minor edit to CUDA api : add notion of fat_cubin_handle (currently not used for anything)
4. minor edits to deadlock detection message (more accurate reporting of source of deadlock)
5. other minor edits
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7809]
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[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7807]
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cleaning up
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7806]
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(i'll use "fermi" for more disruptive changes to the pipeline model such
as updating the MSHRs and getting rid of the warp tracker, ripping out DWF, etc...)
[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 7805]
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