We always read system uptime before log start time. So the uptime
should be always smaller number, except it includes system suspend
time. It seems better to ask for --rel and exit() than try to be
smart and try to recovery from this situation or generate huge
messy graphs.
---
src/bootchart/bootchart.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/bootchart/bootchart.c b/src/bootchart/bootchart.c
index 909ef46..22c66ba 100644
--- a/src/bootchart/bootchart.c
+++ b/src/bootchart/bootchart.c
@@ -350,6 +350,14 @@ int main(int argc, char *argv[]) {
log_uptime();
+ if (graph_start < 0.0) {
+ fprintf(stderr,
+ "Failed to setup graph start time.\n\nThe system
uptime "
+ "probably includes time that the system was suspended.
"
+ "Use --rel to bypass this issue.\n");
+ exit (EXIT_FAILURE);
+ }
+
has_procfs = access("/proc/vmstat", F_OK) == 0;
LIST_HEAD_INIT(head);
--
1.9.3
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