Hello All,
I'm trying to get traces of IPC every 10^6 clock cycles for every core
in a 4-core setup. To do so, I've defined a new trace flag, and try
using it only once every 1000000 cycles with this:
if((uint64_t)numCycles.value() % 1000000 == 0) {
DPRINTF(IPC, "cycle: %lld, inst: %lld\n", (uint64_t)numCycles.value(),
(uint64_t)totalCommittedInsts.value() );
}
(in: template <class Impl> void FullO3CPU<Impl>::tick())
However, apparently at random, some of the DPRINTFs that I expect,
do not work (or are not invoked) and I lack some data. Moreover, this
behaviour is not synchronised between cores (CPUs).
Being new to m5, I'd really appreciate some feedback on what I may be
doing wrong and also whether there is some established method of
generating various traces.
Thanks in advance,
Bartosz Wojciechowski
PS. Below is my code and how I use it.
I've implemented this:
diff -r 2b5fbdcbfb5d src/cpu/o3/SConscript
---a/src/cpu/o3/SConscript Fri Nov 26 20:47:23 2010 -0500
+++b/src/cpu/o3/SConscript Mon Nov 29 14:45:44 2010 +0100
@@ -64,6 +64,7 @@
Source('store_set.cc')
Source('thread_context.cc')
+ TraceFlag('IPC')
TraceFlag('LSQ')
TraceFlag('LSQUnit')
TraceFlag('MemDepUnit')
diff -r 2b5fbdcbfb5d src/cpu/o3/cpu.cc
--- a/src/cpu/o3/cpu.cc Fri Nov 26 20:47:23 2010 -0500
+++ b/src/cpu/o3/cpu.cc Mon Nov 29 14:45:44 2010 +0100
@@ -502,7 +502,10 @@
++numCycles;
-// activity = false;
+ //IPC logging
+ if((uint64_t)numCycles.value() % 1000000 == 0) {
+ DPRINTF(IPC, "cycle: %lld, inst: %lld\n",
(uint64_t)numCycles.value(), (uint64_t)totalCommittedInsts.value() );
+ }
//Tick each of the stages
fetch.tick();
And run it like this:
time ../../build/ALPHA_SE/m5.opt --outdir=m5_gcc_4 --redirect-stdout \
--stdout-file=out.txt --redirect-stderr --stderr-file=err.txt \
--trace-flags=IPC ../../configs/example/se_tmp.py --detailed --caches \
--l2cache -n4 --maxinst=1000000000 --cmd="gcc;gcc;gcc;gcc" \
--options="166.i -o 466.o;167.i -o 467.o;168.i -o 468.i;169.i -o 469.o"
--
Bartosz Wojciechowski
Computer Architecture Group
Institute of Computer Engineering, Control and Robotics
Wrocław University of Technology, Wrocław, Poland
http://zak.iiar.pwr.wroc.pl/
tel.: +48 71 320 28 73
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