Matthew Poremba has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/56451 )
Change subject: configs: Allow for no DMAs in Ruby GPU tester
......................................................................
configs: Allow for no DMAs in Ruby GPU tester
If there are no DMA devices, we should not create any tester threads,
sequencers, or an IO crossbar.
Change-Id: I5762a70a064df5310e3f30d41bffc7800b53eb0b
---
M configs/example/ruby_gpu_random_test.py
1 file changed, 25 insertions(+), 7 deletions(-)
diff --git a/configs/example/ruby_gpu_random_test.py
b/configs/example/ruby_gpu_random_test.py
index a5d9a49..be6d3f7 100644
--- a/configs/example/ruby_gpu_random_test.py
+++ b/configs/example/ruby_gpu_random_test.py
@@ -234,11 +234,15 @@
#
# Make generic DMA sequencer for Ruby to use
#
-dma_devices = [TesterDma()] * n_DMAs
-system.piobus = IOXBar()
-for _, dma_device in enumerate(dma_devices):
- dma_device.pio = system.piobus.mem_side_ports
-system.dma_devices = dma_devices
+if n_DMAs > 0:
+ dma_devices = [TesterDma()] * n_DMAs
+ system.piobus = IOXBar()
+ for _, dma_device in enumerate(dma_devices):
+ dma_device.pio = system.piobus.mem_side_ports
+ system.dma_devices = dma_devices
+else:
+ # If no DMAs, we do not need a piobus
+ system.piobus = None
#
# Create the Ruby system
@@ -250,7 +254,8 @@
# size of system.cpu
cpu_list = [ system.cpu ] * args.num_cpus
Ruby.create_system(args, full_system = False,
- system = system, dma_ports = system.dma_devices,
+ system = system,
+ dma_ports = system.dma_devices if n_DMAs > 0 else [],
cpus = cpu_list)
#
@@ -275,7 +280,8 @@
for i, ruby_port in enumerate(system.ruby._cpu_ports):
ruby_port.no_retry_on_stall = True
ruby_port.using_ruby_tester = True
- ruby_port.mem_request_port = system.piobus.cpu_side_ports
+ if system.piobus is not None:
+ ruby_port.mem_request_port = system.piobus.cpu_side_ports
if i < n_CUs:
tester.cu_vector_ports = ruby_port.in_ports
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I5762a70a064df5310e3f30d41bffc7800b53eb0b
Gerrit-Change-Number: 56451
Gerrit-PatchSet: 1
Gerrit-Owner: Matthew Poremba <matthew.pore...@amd.com>
Gerrit-MessageType: newchange
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