From 29b1ab34861f689ad1fe4d796b4229750d72a948 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcel=20L=C3=BCtke=20Dreimann?=
 <marcel.luetkedreimann@uos.de>
Date: Thu, 19 Jan 2023 09:20:01 +0100
Subject: [PATCH] cfs: fix fairness for later created vgpus

---
 .../src/virt/strategies/cfs.cc                   | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/repos/dde_uos-intel-gpgpu/src/virt/strategies/cfs.cc b/repos/dde_uos-intel-gpgpu/src/virt/strategies/cfs.cc
index cf9d2e2757..e02ff97425 100644
--- a/repos/dde_uos-intel-gpgpu/src/virt/strategies/cfs.cc
+++ b/repos/dde_uos-intel-gpgpu/src/virt/strategies/cfs.cc
@@ -21,7 +21,23 @@ static unsigned long long int rdtsc()
 
 void CompletlyFair::addVGPU(VGpu* vgpu)
 {
+    // create new entry
     cfs_entry* ce = new (_global_gpgpu_genode->getAlloc()) cfs_entry(vgpu);
+
+    // find current min
+    cfs_entry* min = nullptr;
+    _run_list.head([&min](cfs_entry& ce){
+        min = &ce;
+    });
+    _run_list.for_each([&min](cfs_entry& ce){
+        if(ce.runtime < min->runtime)
+        {
+            min = &ce;
+        }
+    });
+
+    // add new entry with minimum runtime
+    ce->runtime = min->runtime;
     _run_list.enqueue(*ce);
 }