[NSWI131] HW 7: clock_gettime

[Karel Maděra]

Hello,




I know it is after deadline for HW7, but I just can't get it to work and I 
would like to finish it anyway.




How do you measure time in your pintool?




I tried to use clock_gettime, which is declared in the PIN headers, so it 
compiles just fine, but when I run

pin with the tool it crashes when dynamic loader cannot find implementation 
in the PIN CRT.




It writes the following error:

Unable to load home/07-pin-maderak/obj-intel64/write_throughput.so: dlopen 
failed: cannot locate symbol "clock_gettime" referenced by "home/07-pin-
maderak/obj-intel64/write_throughput.so"...





I used the makefile from the PIN simple examples and I checked that it is 
linking and loading the correct libraries.





The I looked at the exported symbols of the PIN CRT libraries and could not 
find any mention of clock_gettime,

so is it just me and the version of PIN I downloaded or is it really not 
implemented?




Clock_gettime seemed like the right choice for the measurement we are trying
to do, so I just tried to make 


it work with no success.


Should I use something like rdtscp or gettimeofday ?




Karel Madera
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