perf kvm: Use NSEC_PER_USEC

Following kernel practices and better documenting units of time.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-5x6p6fmzrogonpbnkkkw4usk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index a0040f74e935f0626171c23852f6b9e1b6248884..08fa88f62a246f4f309410da45379aa21949f14e 100644 (file)
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -363,7 +363,7 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
                if (!skip_event(decode)) {
                        pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
                                 sample->time, sample->pid, vcpu_record->vcpu_id,
-                                decode, time_diff/1000);
+                                decode, time_diff / NSEC_PER_USEC);
                }
        }
 
@@ -609,15 +609,15 @@ static void print_result(struct perf_kvm_stat *kvm)
                pr_info("%10llu ", (unsigned long long)ecount);
                pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
                pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
-               pr_info("%9.2fus ", (double)min / 1e3);
-               pr_info("%9.2fus ", (double)max / 1e3);
-               pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
+               pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
+               pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
+               pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
                        kvm_event_rel_stddev(vcpu, event));
                pr_info("\n");
        }
 
        pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
-               kvm->total_count, kvm->total_time / 1e3);
+               kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
 
        if (kvm->lost_events)
                pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);