commit 586afd762bfa149f5ca167bd5fd5a0cd59ce94fe
author Damjan Marion <damarion@cisco.com> Wed Apr 05 19:18:20 2017 +0200
committer Dave Barach <openvpp@barachs.net> Thu Apr 06 11:31:39 2017 +0000
tree 808b57c61e0fe1a181871bb1ad94398c5ba42671
parent bc799c92d761a2d45105aa6a1685b3663687d2a4

Use thread local storage for thread index

This patch deprecates stack-based thread identification,
Also removes requirement that thread stacks are adjacent.

Finally, possibly annoying for some folks, it renames
all occurences of cpu_index and cpu_number with thread
index. Using word "cpu" is misleading here as thread can
be migrated ti different CPU, and also it is not related
to linux cpu index.

Change-Id: I68cdaf661e701d2336fc953dcb9978d10a70f7c1
Signed-off-by: Damjan Marion <damarion@cisco.com>

src/vnet/ipsec/esp.h

diff --git a/src/vnet/ipsec/esp.h b/src/vnet/ipsec/esp.h
index 50cac80..799003b 100644
--- a/src/vnet/ipsec/esp.h
+++ b/src/vnet/ipsec/esp.h
@@ -282,8 +282,8 @@
 	   u8 * data, int data_len, u8 * signature, u8 use_esn, u32 seq_hi)
 {
   esp_main_t *em = &esp_main;
-  u32 cpu_index = os_get_cpu_number ();
-  HMAC_CTX *ctx = &(em->per_thread_data[cpu_index].hmac_ctx);
+  u32 thread_index = vlib_get_thread_index ();
+  HMAC_CTX *ctx = &(em->per_thread_data[thread_index].hmac_ctx);
   const EVP_MD *md = NULL;
   unsigned int len;
 
@@ -292,10 +292,10 @@
   if (PREDICT_FALSE (em->esp_integ_algs[alg].md == 0))
     return 0;
 
-  if (PREDICT_FALSE (alg != em->per_thread_data[cpu_index].last_integ_alg))
+  if (PREDICT_FALSE (alg != em->per_thread_data[thread_index].last_integ_alg))
     {
       md = em->esp_integ_algs[alg].md;
-      em->per_thread_data[cpu_index].last_integ_alg = alg;
+      em->per_thread_data[thread_index].last_integ_alg = alg;
     }
 
   HMAC_Init (ctx, key, key_len, md);