> * Elena Reshetova <elena.reshet...@intel.com> wrote: > > > 2) Andy's tests, misc-tests: ./timing_test_64 10M sys_enosys > > base: 10000000 loops in 1.62224s > > = 162.22 nsec / loop > > random_offset (prandom_u32() every syscall): 10000000 loops in 1.64660s > > = > 166.26 nsec / loop > > Stupid question, how did you manage to buil timing_test_64? Here it fails > with a bog standard gcc 7.3.0 x86-64 distro toolchain: > > dagon:~/luto-misc-tests.git> make timing_test_64 > g++ -m64 -o timing_test_64 -O2 -g -std=gnu++11 -pthread -Wall > timing_test.cc -lrt - > ldl > /usr/bin/ld: /tmp/cc8VRkuV.o: relocation R_X86_64_32S against > `.text.startup' can > not be used when making a PIE object; recompile with -fPIC > /usr/bin/ld: final link failed: Nonrepresentable section on outputcollect2: > error: ld > returned 1 exit status > Makefile:39: recipe for target 'timing_test_64' failed
I used -no-pie on CFLAGS/CCFLAGS for the whole set of tools. Unfortunately, this was only the first problem. After it complains about rdwrgsbase asm case... That one I didn't quite understand, but because I could see that this case wasn't used for particular measurements I was doing, I just commented that particular case out. > > > I'm using cb7f9f0592f8, which is like 1.5 years old - is this still the > latest and greatest: > > git://git.kernel.org/pub/scm/linux/kernel/git/luto/misc-tests.git Yes, same for me. Best Regards, Elena.
