vpp_lite: add cpu pinning support (VPP-467)

Proper cpu pinning in vpp_lite platform, like in normal vpp image.
Extended “show threads” command to show propper information.
Changed handling of coreID and socketID for threads in "show threads"
CLI, pthread_getaffinity is used instead of info stored in DPDK.

Change-Id: Ic8299ec5e284472bb10a37a95fadeed57b6edae8
Signed-off-by: Pavel Kotucek <pkotucek@cisco.com>

1 files changed, 18 insertions, 1 deletions

diff --git a/vpp/conf/startup.conf b/vpp/conf/startup.conf
index 84a026474c9..bce002027bf 100644
--- a/vpp/conf/startup.conf
+++ b/vpp/conf/startup.conf
@@ -14,13 +14,30 @@ api-segment {
 }
 
 cpu {
+	## In the VPP there is one main thread and optionally the user can create worker(s)
+	## The main thread and worker thread(s) can be pinned to CPU core(s) manually or automatically
+
+	## Manual pinning of thread(s) to CPU core(s)
+
 	## Set logical CPU core where main thread runs
 	# main-core 1
 
 	## Set logical CPU core(s) where worker threads are running
-	## by default there is no worker threads started
 	# corelist-workers 2-3,18-19
 
+	## Automatic pinning of thread(s) to CPU core(s)
+
+	## Sets number of CPU core(s) to be skipped (1 ... N-1)
+	## Skipped CPU core(s) are not used for pinning main thread and working thread(s).
+	## The main thread is automatically pinned to the first available CPU core and worker(s)
+	## are pinned to next free CPU core(s) after core assigned to main thread
+	# skip-cores 4
+
+	## Specify a number of workers to be created
+	## Workers are pinned to N consecutive CPU cores while skipping "skip-cores" CPU core(s)
+	## and main thread's CPU core
+	# workers 2
+
 	## Set scheduling policy and priority of main and worker threads
 
 	## Scheduling policy options are: other (SCHED_OTHER), batch (SCHED_BATCH)