diff options
| -rw-r--r-- | tools/misc/xenpm.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/tools/misc/xenpm.c b/tools/misc/xenpm.c index f07a53967f..65876fe370 100644 --- a/tools/misc/xenpm.c +++ b/tools/misc/xenpm.c @@ -351,8 +351,12 @@ static void signal_int_handler(int signo) for ( i = 0; i < max_cpu_nr; i++ ) if ( !get_cxstat_by_cpuid(xc_handle, i, &cxstat_end[i]) ) for ( j = 0; j < cxstat_end[i].nr; j++ ) - sum_cx[i] += cxstat_end[i].residencies[j] - - cxstat_start[i].residencies[j]; + { + int64_t diff = (int64_t)cxstat_end[i].residencies[j] - + (int64_t)cxstat_start[i].residencies[j]; + if ( diff >=0 ) + sum_cx[i] += diff; + } } if ( get_pxstat_by_cpuid(xc_handle, 0, NULL) != -ENODEV ) @@ -379,8 +383,10 @@ static void signal_int_handler(int signo) { for ( j = 0; j < cxstat_end[i].nr; j++ ) { - res = cxstat_end[i].residencies[j] - - cxstat_start[i].residencies[j]; + int64_t diff = (int64_t)cxstat_end[i].residencies[j] - + (int64_t)cxstat_start[i].residencies[j]; + + res = ( diff >= 0 ) ? diff : 0; triggers = cxstat_end[i].triggers[j] - cxstat_start[i].triggers[j]; avg_res = (triggers==0) ? 0: (double)res/triggers/1000000.0; |