Differences

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--- searchwing-pi-datarate [2019/11/27 17:06]
beckmanf http transfer
+++ searchwing-pi-datarate [2020/01/08 21:41]
beckmanf [Julian tests] added channel remark
@@ Line 483: / Line 483: @@
 The results for the wget transfer time are 0.8s for the 1MB file, 1.1s for the 3MB file and 30s for teh 100MB file. However, these measurements were made at 19.00, i.e. there is quite some traffic on channel 1 now...
-The transfer times for the 100MB were 30s, 24s, 25s, 26s. This corresponds to a transfer rate of 30 MBit/s.
+The transfer times for the 100MB were 30s, 24s, 25s, 26s. This corresponds to a transfer rate of 30 MBit/s. Some times for the 1MB file were: 0.2 0.2 0.2 0.9 0.3 0.7 0.7 0.2 -> There is heavy congestion on channel 1.
+Based on the 0.2s for the 1 MB File, this translates to **5 MB/s = 40 MBit/s** rate for an undisturbed channel for a transfer via http. This is again exactly the achieved iperf rate as shown above.
+==== Julian tests ====
+  * WIFI Only datatransfer
+  * Router: FritzBox 7430 AW
+  * Placement: Pi Zero and Laptop placed 10cm above router.
+  * data ammount: 540 MByte
+  * ** Laptop and Raspberry Pi share the same Wifi channel => Each packet goes from Pi to AP and from AP to Laptop. => Congestion on the Wifi Channel. **
+=== wget ===
+  * time=213sek
+  * rate=2.53 Mbyte/sek
+  * cpuusage=70%
+=== ftp ===
+  * time=361sek
+  * rate=1.495 Mbyte/sek
+  * cpuusage=50-60%
 ==== Results ====