2023-koji: Add scaling notes

diff --git a/2023-hardware/notes.txt b/2023-hardware/notes.txt
index c13f6d7..62bcdb3 100644 (file)
--- a/2023-hardware/notes.txt
+++ b/2023-hardware/notes.txt
@@ -187,3 +187,8 @@ A few tips to make TCG run (a bit) fast(er):
  - Software TLB
 
  - Fast vs slow jumps
+
+ - Performance scales almost linearly with # vCPUs
+
+    * I compared 4 vCPU vs 16 vCPU virtual machine, and parallelized
+      build speed inside the guest increased by 3.3x, which is almost linear