From 5421a4d1725d96211a3050b5fa9a01a7fff9742f Mon Sep 17 00:00:00 2001 From: Robert Schmidt Date: Mon, 12 Feb 2024 18:42:49 +0100 Subject: [PATCH] O-RAN 7.2/doc: Update info on L1_tx_thread (diff d.txt ../graphs/_dijkstraData.txt ) --- doc/ORAN_FHI7.2_Tutorial.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/doc/ORAN_FHI7.2_Tutorial.md b/doc/ORAN_FHI7.2_Tutorial.md index 61b329fed1..2ef96895f6 100644 --- a/doc/ORAN_FHI7.2_Tutorial.md +++ b/doc/ORAN_FHI7.2_Tutorial.md @@ -91,7 +91,7 @@ Your server could be: DPDK, OAI and kernel threads require to be properly allocated to extract maximum real-time performance for your use case. -1. **NOTE**: Currently the default OAI 7.2 configuration file requires isolated **CPUs 0,2,4** for DPDK/libXRAN, **CPU 6** for `ru_thread` and **CPU 8** for `L1_rx_thread`. It is preferrable to have all these threads on the same socket. +1. **NOTE**: Currently the default OAI 7.2 configuration file requires isolated **CPUs 0,2,4** for DPDK/libXRAN, **CPU 6** for `ru_thread`, **CPU 8** for `L1_rx_thread` and **CPU 10** for `L1_tx_thread`. It is preferrable to have all these threads on the same socket. 2. Allocating CPUs to the OAI nr-softmodem is done using the `--thread-pool` option. Allocating 4 CPUs is the minimal configuration but we recommend to allocate at least **8** CPUs. And they can be on a different socket as the DPDK threads. 3. And to avoid kernel preempting these allocated CPUs, it is better to force the kernel to use un-allocated CPUs. @@ -102,6 +102,7 @@ Let summarize for example on a `32-CPU` single NUMA node system, regardless of t |XRAN DPDK usage |0,2,4 | |OAI `ru_thread` |6 | |OAI `L1_rx_thread` |8 | +|OAI `L1_tx_thread` |10 | |OAI `nr-softmodem` |1,3,5,7,9,11,13,15| |kernel |16-31 | @@ -602,6 +603,7 @@ Edit the sample OAI gNB configuration file and check following parameters: * `L1s` section * Set an isolated core for L1 thread `L1_rx_thread_core`, in our environment we are using CPU 8 + * Set an isolated core for L1 thread `L1_tx_thread_core`, in our environment we are using CPU 10 * `phase_compensation` should be set to 0 to disable when it is performed in the RU and set to 1 when it should be performed on the DU side * `RUs` section