Add preemption_logger benchmark, make target, and fix d82c60c

Benchmark supports:
=> Spinning on-GPU until some number of preemptions have occured
=> Monitoring GPU scheduling by logging preempt and resume times
=> Logging the above as raw GPU, or converted CPU, times
=> Measuring launch overheads

Also imports task_host_utilities.cu from cuda_scheduling_examiner
as of commit 9fc0ca898ef64b82cbc3734c60405723650bc66f. This is
needed for timing logic used in both preemption_logger and
mon_cross_ctx_copies, thus the latter would not compile prior to
this commit.

Also adds a new testbench helper, and a .gitignore for binaries.

1 files changed, 3 insertions, 0 deletions

diff --git a/testbench.h b/testbench.h
index 28d7f77..5b47bd4 100644
--- a/testbench.h
+++ b/testbench.h
@@ -11,4 +11,7 @@
 
 #define s2ns(s) ((s)*1000l*1000l*1000l)
 #define ns2ms(s) ((s)/(1000l*1000l))
+
+// Return the difference between two timestamps in nanoseconds
 #define timediff(start, end) ((s2ns((end).tv_sec) + (end).tv_nsec) - (s2ns((start).tv_sec) + (start).tv_nsec))
+#define time2ns(time) (s2ns((time).tv_sec) + (time).tv_nsec)