I’m experimenting with moving the interrupt controller (cchip) up the memory
hierarchy to be much closer to the CPUs for faster access. But when I
assign the cchip to be connected to the l2bus, m5 panics immediately with
this error:
command line: ../../build/ALPHA_FS/m5.opt fs1.py -b thread_scaletest32 -k
vmlinux.expbackoff -t -n 4 --caches --l2cache -m 1500000000
warning: overwriting port tsunami.cchip.pio value iobus.port[1] with
tol2bus.port[1]
Global frequency set at 1000000000000 ticks per second
warn: kernel located at:
/n/poolfs/z/home/blakeg/m5-dev/binaries/vmlinux.expbackoff
0: system.tsunami.io.rtc: Real-time clock set to Thu Jan 1 00:00:00
2009
Listening for system connection on port 3456
panic: pio port already connected to.
@ cycle 0
[getPort:build/ALPHA_FS/dev/io_device.hh, line 210]
Program aborted at cycle 0
Aborted (core dumped)
Looking in config.ini, the cchip is connected twice, once to the l2bus *and*
to the iobus, which is causing the panic and before hand the warning. I
can’t find where the cchip is being always assigned to the iobus, especially
after I override it by connecting it to the l2bus in fs.py. Any ideas?
Thanks,
Geoff
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