From b3ffc745fea09622e5eb36fb8db896a896f03bcd Mon Sep 17 00:00:00 2001
From: Tom <tom.meyer@fu-berlin.de>
Date: Thu, 28 Mar 2019 12:48:23 +0100
Subject: [PATCH] todo: check overflow perf
---
kernel/sched/pb.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/kernel/sched/pb.c b/kernel/sched/pb.c
index 6117dba5aaae..7bc86a9a7099 100644
--- a/kernel/sched/pb.c
+++ b/kernel/sched/pb.c
@@ -118,9 +118,11 @@ static struct task_struct * pick_next_task_pb(struct rq *rq,
printk(KERN_WARNING "PB TASK %llu RAN %llu INSTRUCTIONS TOO SHORT\n", pb->plan[pb->c_entry].task_id, under_time);
} else if (perf_counter > pb->plan[pb->c_entry].n_instr) {
- u64 under_time = perf_counter - pb->plan[pb->c_entry].n_instr;
+ //TODO: Check if actually an overflow occurs and an another calculation is necessary
+ // (setting a flag in the perf overflow_handler could be a solution)
+ u64 over_time = perf_counter - pb->plan[pb->c_entry].n_instr;
- printk(KERN_WARNING "PB TASK %llu RAN %llu INSTRUCTIONS TOO LONG\n", pb->plan[pb->c_entry].task_id, under_time);
+ printk(KERN_WARNING "PB TASK %llu RAN %llu INSTRUCTIONS TOO LONG\n", pb->plan[pb->c_entry].task_id, over_time);
}
pb->c_entry++;
--
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