From 97a20365923d5c642b8c33b1586dcd86991db9d9 Mon Sep 17 00:00:00 2001
From: Blinningjr <nicke.l@telia.com>
Date: Fri, 1 Jan 2021 17:31:04 +0100
Subject: [PATCH] Finished total load factor function
---
srp_analysis/src/main.rs | 37 ++++++++++++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
diff --git a/srp_analysis/src/main.rs b/srp_analysis/src/main.rs
index 4e528df..9246224 100644
--- a/srp_analysis/src/main.rs
+++ b/srp_analysis/src/main.rs
@@ -68,9 +68,44 @@ fn main() {
let tasks: Tasks = vec![t1, t2, t3];
println!("tasks {:?}", &tasks);
- // println!("tot_util {}", tot_util(&tasks));
+ println!("tot_util {}", total_load_factor(&tasks));
let (ip, tr) = pre_analysis(&tasks);
println!("ip: {:?}", ip);
println!("tr: {:?}", tr);
}
+
+
+/*
+ * Calculates the total load factor(Ltot).
+ *
+ * Note: We can compute the total CPU request (or load factor), as Ltot = sum(L(T)), T being the set of tasks.
+ */
+fn total_load_factor(tasks: &Tasks) -> f32 {
+ let mut ltot: f32 = 0.0;
+ for t in tasks {
+ ltot += cpu_load(t);
+ }
+ return ltot;
+}
+
+
+/*
+ * Calculates the cpu load of a task(L(t) where t is a task).
+ *
+ * Note: Each task t has a WCET C(t) and given (assumed) inter-arrival time A(t). The CPU request (or load) inferred by a task is L(t) = C(t)/A(t). Ask yourself, what is the consequence of C(t) > A(t)?
+ */
+fn cpu_load(task: &Task) -> f32 {
+ return (wcet(task) as f32) / (task.inter_arrival as f32)
+}
+
+
+/*
+ * Worst case execution time(WCET) of a task t(C(t)).
+ */
+fn wcet(task: &Task) -> u32 {
+ // TODO: Check if this is correct.
+ return task.trace.end.wrapping_sub(task.trace.start);
+}
+
+
--
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