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-rw-r--r--tools/perf/builtin-top.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index c0f69e80b2cc..2d8806bac258 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -870,8 +870,6 @@ static unsigned int mmap_read_head(struct mmap_data *md)
870 return head; 870 return head;
871} 871}
872 872
873struct timeval last_read, this_read;
874
875static void mmap_read_counter(struct mmap_data *md) 873static void mmap_read_counter(struct mmap_data *md)
876{ 874{
877 unsigned int head = mmap_read_head(md); 875 unsigned int head = mmap_read_head(md);
@@ -879,8 +877,6 @@ static void mmap_read_counter(struct mmap_data *md)
879 unsigned char *data = md->base + page_size; 877 unsigned char *data = md->base + page_size;
880 int diff; 878 int diff;
881 879
882 gettimeofday(&this_read, NULL);
883
884 /* 880 /*
885 * If we're further behind than half the buffer, there's a chance 881 * If we're further behind than half the buffer, there's a chance
886 * the writer will bite our tail and mess up the samples under us. 882 * the writer will bite our tail and mess up the samples under us.
@@ -891,14 +887,7 @@ static void mmap_read_counter(struct mmap_data *md)
891 */ 887 */
892 diff = head - old; 888 diff = head - old;
893 if (diff > md->mask / 2 || diff < 0) { 889 if (diff > md->mask / 2 || diff < 0) {
894 struct timeval iv; 890 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
895 unsigned long msecs;
896
897 timersub(&this_read, &last_read, &iv);
898 msecs = iv.tv_sec*1000 + iv.tv_usec/1000;
899
900 fprintf(stderr, "WARNING: failed to keep up with mmap data."
901 " Last read %lu msecs ago.\n", msecs);
902 891
903 /* 892 /*
904 * head points to a known good entry, start there. 893 * head points to a known good entry, start there.
@@ -906,8 +895,6 @@ static void mmap_read_counter(struct mmap_data *md)
906 old = head; 895 old = head;
907 } 896 }
908 897
909 last_read = this_read;
910
911 for (; old != head;) { 898 for (; old != head;) {
912 event_t *event = (event_t *)&data[old & md->mask]; 899 event_t *event = (event_t *)&data[old & md->mask];
913 900