gettime: drop tv_valid->last_cycles and tv_valid->last_tv_valid

The two variables were set on every call to fio_gettime that uses the CPU
clock. However, these values were never read anywhere. So we should drop
them to reduce the amount of work done in the fast path.

diff --git a/gettime.c b/gettime.c
index 093b6a499df0e1549ae65b158ae578814e974778..6a50ec548d0091d0f489fb45c6310254539ed7f2 100644 (file)
--- a/gettime.c
+++ b/gettime.c
@@ -31,8 +31,6 @@ static unsigned int cycles_wrap;
 int tsc_reliable = 0;
 
 struct tv_valid {
-       uint64_t last_cycles;
-       int last_tv_valid;
        int warned;
 };
 #ifdef ARCH_HAVE_CPU_CLOCK
@@ -198,9 +196,6 @@ static void __fio_gettime(struct timespec *tp)
                nsecs = multiples * nsecs_for_max_cycles;
                nsecs += ((t & max_cycles_mask) * clock_mult) >> clock_shift;
 #endif
-               tv->last_cycles = t;
-               tv->last_tv_valid = 1;
-
                tp->tv_sec = nsecs / 1000000000ULL;
                tp->tv_nsec = nsecs % 1000000000ULL;
                break;