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| author | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-02-02 16:05:06 +0000 |
|---|---|---|
| committer | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-02-02 16:06:36 +0000 |
| commit | f3f7da624de546c8f4e6b236d364377b19c49d78 (patch) | |
| tree | 54d0b09728402ac3a794e80467c4d44d07c8590b /src/common | |
| parent | performance_tests: remove add_arg call stray extra param (diff) | |
| download | monero-f3f7da624de546c8f4e6b236d364377b19c49d78.tar.xz | |
perf_timer: rewrite to make it clear there is no division by zero
It could have happened if epee::misc_utils::get_ns_count
is buggy, at a push
Coverity 182561
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/perf_timer.cpp | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/common/perf_timer.cpp b/src/common/perf_timer.cpp index 41e23130d..16abdfd99 100644 --- a/src/common/perf_timer.cpp +++ b/src/common/perf_timer.cpp @@ -49,16 +49,15 @@ namespace #ifdef __x86_64__ uint64_t get_ticks_per_ns() { - uint64_t t0 = epee::misc_utils::get_ns_count(); + uint64_t t0 = epee::misc_utils::get_ns_count(), t1; uint64_t r0 = get_tick_count(); while (1) { - uint64_t t = epee::misc_utils::get_ns_count(); - if (t - t0 > 1*1000000000) break; // work one second + t1 = epee::misc_utils::get_ns_count(); + if (t1 - t0 > 1*1000000000) break; // work one second } - uint64_t t1 = epee::misc_utils::get_ns_count(); uint64_t r1 = get_tick_count(); uint64_t tpns256 = 256 * (r1 - r0) / (t1 - t0); return tpns256 ? tpns256 : 1; |