Support has been added for SDMA RLC queues which are used for host to
device and device to host "memcpy" calls. Previously the SDMA engine was
disabled which caused GPU BLIT kernels to be called. This removes the
environment variable disabling SDMAs which has two main benefits:
- It will be much easier to debug host/device transfer by using SDMA
debug flag.
- Simulation time is improved since we no longer need detailed GPU
simulation to copy data and instead are doing a simple large DMA
Change-Id: I7524245731d301b5c26394318f2156ed6b4c983a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/62717
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
The environment variable HSA_ENABLE_INTERRUPT controls if Interrupt or
busy wait signals are used in the ROCm runtime. Interrupts are not being
sent in gem5 causing simulations to hang indefinitely in certain
situations. To fix this, always disable interrupts to fall back to busy
wait signals. Using interrupts is an old and simple optimization to not
waste CPU cycles, but from the perspective of simulation this is not
important. Disabling interrupt-based HSA signals therefore increases the
number of applications working within gem5.
Change-Id: I1ae21d7ee01548a4d00a8972642079b90278f9a2
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/61652
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
