put pdcp on extra thread for improved real-time operation (no impact on simulation/emulation)

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4068 818b1a75-f10b-46b9-bf7c-635c3b92a50f

openair2/LAYER2/MAC/eNB_scheduler.c

@@ -55,8 +55,8 @@
 #include "RRC/LITE/extern.h"
 #include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
 
-
 //#include "LAYER2/MAC/pre_processor.c"
+#include "pdcp.h"
 
 double snr_mcs[28]={-4.1130, -3.3830, -2.8420, -2.0480, -1.3230, -0.6120, 0.1080, 0.977, 1.7230, 2.7550, 3.1960, 3.8080, 4.6870, 5.6840, 6.6550, 7.7570, 8.3730, 9.3040, 9.5990, 10.9020, 11.7220, 12.5950, 13.4390, 14.8790, 15.8800, 16.4800, 17.8690, 18.7690};
 int cqi_mcs[3][16] = {{0, 0, 0, 2, 4, 6, 8, 11, 13, 15, 18, 20, 22, 25, 27, 27},{0, 0, 0, 2, 4, 6, 8, 11, 13, 15, 18, 20, 22, 25, 27, 27},{0, 0, 0, 2, 4, 6, 8, 11, 13, 15, 18, 19, 22, 24, 26, 27}};
@@ -4199,7 +4199,27 @@ void eNB_dlsch_ulsch_scheduler(u8 Mod_id,u8 cooperation_flag, u32 frame, u8 subf
 
   //if (subframe%5 == 0)
 #ifdef EXMIMO 
-  pdcp_run(frame, 1, 0, Mod_id);
+  //pdcp_run(frame, 1, 0, Mod_id);
+ 
+  if (pthread_mutex_lock (&pdcp_mutex) != 0) {
+    LOG_E(PDCP,"Cannot lock mutex\n");
+    //return(-1);
+  }
+  else {
+    pdcp_instance_cnt++;
+    pthread_mutex_unlock(&pdcp_mutex);
+        
+    if (pdcp_instance_cnt == 0) {
+      if (pthread_cond_signal(&pdcp_cond) != 0) {
+	LOG_E(PDCP,"pthread_cond_signal unsuccessfull\n");
+	//return(-1);
+      }
+    }
+    else {
+      LOG_W(PDCP,"PDCP thread busy!!! inst_cnt=%d\n",pdcp_instance_cnt);
+    }
+  }
+  
 #endif
 #ifdef CELLULAR
   rrc_rx_tx(Mod_id, frame, 0, 0);

openair2/LAYER2/MAC/ue_procedures.c

@@ -35,6 +35,10 @@
 
 */
 
+#ifdef EXMIMO
+#include <pthread.h>
+#endif
+
 #include "extern.h"
 #include "defs.h"
 #ifdef PHY_EMUL
@@ -54,6 +58,7 @@
 #ifdef PHY_EMUL
 #include "SIMULATION/simulation_defs.h"
 #endif
+#include "pdcp.h"
 
 #define DEBUG_HEADER_PARSING 1
 #define ENABLE_MAC_PAYLOAD_DEBUG
@@ -1211,7 +1216,27 @@ UE_L2_STATE_t ue_scheduler(u8 Mod_id,u32 frame, u8 subframe, lte_subframe_t dire
   //Rrc_xface->Frame_index=Mac_rlc_xface->frame;
   //if (subframe%5 == 0)
 #ifdef EXMIMO
-  pdcp_run(frame, 0, Mod_id, eNB_index);
+  //pdcp_run(frame, 0, Mod_id, eNB_index);
+  
+  if (pthread_mutex_lock (&pdcp_mutex) != 0) {
+    LOG_E(PDCP,"Cannot lock mutex\n");
+    //return(-1);
+  }
+  else {
+    pdcp_instance_cnt++;
+    pthread_mutex_unlock(&pdcp_mutex);
+        
+    if (pdcp_instance_cnt == 0) {
+      if (pthread_cond_signal(&pdcp_cond) != 0) {
+	LOG_E(PDCP,"pthread_cond_signal unsuccessfull\n");
+	//return(-1);
+      }
+    }
+    else {
+      LOG_W(PDCP,"PDCP thread busy!!! inst_cnt=%d\n",pdcp_instance_cnt);
+    }
+  }
+  
 #endif 
   UE_mac_inst[Mod_id].frame = frame;
   UE_mac_inst[Mod_id].subframe = subframe;

openair2/LAYER2/Makefile.inc

@@ -26,6 +26,7 @@ SOURCES_L2 +=  $(PDCP_DIR)/pdcp_fifo.c
 SOURCES_L2 +=  $(PDCP_DIR)/pdcp_sequence_manager.c
 SOURCES_L2 +=  $(PDCP_DIR)/pdcp_primitives.c
 SOURCES_L2 +=  $(PDCP_DIR)/pdcp_util.c
+SOURCES_L2 +=  $(PDCP_DIR)/pdcp_thread.c
 
 SOURCES_L2 +=  $(RLC_AM_DIR)/rlc_am.c
 SOURCES_L2 +=  $(RLC_AM_DIR)/rlc_am_init.c

openair2/LAYER2/PDCP_v10.1.0/pdcp.h

@@ -84,6 +84,17 @@
 
 #define FALSE (0x00)
 #define TRUE  !(FALSE)
+
+extern pthread_t pdcp_thread;
+extern pthread_attr_t pdcp_thread_attr;
+extern pthread_mutex_t pdcp_mutex;
+extern pthread_cond_t pdcp_cond;
+extern int pdcp_instance_cnt;
+
+static void *pdcp_thread_main(void* param);
+int init_pdcp_thread(u8 eNB_flag);
+void cleanup_pdcp_thread(void);
+
 typedef unsigned char BOOL;
 
 public_pdcp(unsigned int Pdcp_stats_tx[NB_MODULES_MAX][NB_CNX_CH][NB_RAB_MAX]);

openair2/LAYER2/PDCP_v10.1.0/pdcp_thread.c

@@ -0,0 +1,154 @@
+/*******************************************************************************
+
+  Eurecom OpenAirInterface
+  Copyright(c) 1999 - 2011 Eurecom
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information
+  Openair Admin: openair_admin@eurecom.fr
+  Openair Tech : openair_tech@eurecom.fr
+  Forums       : http://forums.eurecom.fsr/openairinterface
+  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France
+
+*******************************************************************************/
+
+/*! \file pdcp_thread.c
+* \brief
+* \author F. Kaltenberger
+* \date 2013
+* \version 0.1
+* \company Eurecom
+* \email: florian.kaltenberger@eurecom.fr
+* \note
+* \warning
+*/
+#include <pthread.h>
+//#include <inttypes.h>
+
+#include "pdcp.h"
+#include "PHY/extern.h" //for PHY_vars
+#include "UTIL/LOG/log.h"
+#include "UTIL/LOG/vcd_signal_dumper.h"
+
+#define OPENAIR_THREAD_STACK_SIZE    8192
+#define OPENAIR_THREAD_PRIORITY        255
+
+extern int oai_exit;
+
+pthread_t pdcp_thread;
+pthread_attr_t pdcp_thread_attr;
+pthread_mutex_t pdcp_mutex;
+pthread_cond_t pdcp_cond;
+int pdcp_instance_cnt;
+
+static void *pdcp_thread_main(void* param) {
+
+  u8 eNB_flag = *((u8*)param);
+
+  while (!oai_exit) {
+
+    if (pthread_mutex_lock(&pdcp_mutex) != 0) {
+        LOG_E(PDCP,"Error locking mutex.\n");
+    }
+    else {
+        while (pdcp_instance_cnt < 0) {
+            pthread_cond_wait(&pdcp_cond,&pdcp_mutex);
+        }
+        if (pthread_mutex_unlock(&pdcp_mutex) != 0) {	
+            LOG_E(PDCP,"Error unlocking mutex.\n");
+        }
+    }
+
+    if (oai_exit) break;
+
+    if (eNB_flag) {
+      pdcp_run(PHY_vars_eNB_g[0]->frame, eNB_flag, PHY_vars_eNB_g[0]->Mod_id, 0);
+      //LOG_I(PDCP,"Calling pdcp_run (eNB) for frame %d\n",PHY_vars_eNB_g[0]->frame);
+    }
+    else  {
+      pdcp_run(PHY_vars_UE_g[0]->frame, eNB_flag, 0, PHY_vars_UE_g[0]->Mod_id);
+      //LOG_I(PDCP,"Calling pdcp_run (UE) for frame %d\n",PHY_vars_UE_g[0]->frame);
+    }
+
+
+    if (pthread_mutex_lock(&pdcp_mutex) != 0) {
+      LOG_E(PDCP,"Error locking mutex.\n");
+    }
+    else {
+        pdcp_instance_cnt--;
+        if (pthread_mutex_unlock(&pdcp_mutex) != 0) {	
+	  LOG_E(PDCP,"Error unlocking mutex.\n");
+        }
+    }
+  }
+  return(NULL);
+}
+
+
+
+int init_pdcp_thread(u8 eNB_flag) {
+
+    int error_code;
+    struct sched_param p;
+
+    pthread_attr_init (&pdcp_thread_attr);
+    pthread_attr_setstacksize(&pdcp_thread_attr,OPENAIR_THREAD_STACK_SIZE);
+    //attr_dlsch_threads.priority = 1;
+    
+    p.sched_priority = OPENAIR_THREAD_PRIORITY;
+    pthread_attr_setschedparam  (&pdcp_thread_attr, &p);
+#ifndef RTAI_ISNT_POSIX
+    pthread_attr_setschedpolicy (&pdcp_thread_attr, SCHED_FIFO);
+#endif
+    pthread_mutex_init(&pdcp_mutex,NULL);
+    pthread_cond_init(&pdcp_cond,NULL);
+
+    pdcp_instance_cnt = -1;
+    LOG_I(PDCP,"Allocating PDCP thread\n");
+    error_code = pthread_create(&pdcp_thread,
+				&pdcp_thread_attr,
+				pdcp_thread_main,
+				(void*)(&eNB_flag));
+      
+    if (error_code!= 0) {
+      LOG_I(PDCP,"Could not allocate PDCP thread, error %d\n",error_code);
+      return(error_code);
+    }
+    else {
+      LOG_I(PDCP,"Allocate PDCP thread successful\n");
+    }
+       
+    return(0);
+}
+
+void cleanup_pdcp_thread(void) {
+  void *status;
+
+  LOG_I(PDCP,"Scheduling PDCP thread to exit\n");
+  
+  pdcp_instance_cnt = 0;
+  if (pthread_cond_signal(&pdcp_cond) != 0)
+    LOG_I(PDCP,"ERROR pthread_cond_signal\n");
+  else
+    LOG_I(PDCP,"Signalled PDCP thread to exit\n");
+
+  pthread_join(pdcp_thread,&status);
+  LOG_I(PDCP,"PDCP thread exited\n");
+  pthread_cond_destroy(&pdcp_cond);
+  pthread_mutex_destroy(&pdcp_mutex);
+}

openair2/LAYER2/RLC/UM_v9.3.0/rlc_um_dar.c

@@ -364,14 +364,14 @@ void rlc_um_try_reassembly(rlc_um_entity_t *rlcP, u32_t frame, u8_t eNB_flag, si
                             rlcP->reassembly_missing_sn_detected = 0;
                             break;
                         default:
+                            LOG_W(RLC, "[MSC_NBOX][FRAME %05d][RLC_UM][MOD %02d][RB %02d][Missing SN detected][RLC_UM][MOD %02d][RB %02d]\n",
+                                  frame, rlcP->module_id,rlcP->rb_id, rlcP->module_id,rlcP->rb_id);
 #ifdef USER_MODE
                             assert(1 != 1);
 #endif
                         	rlcP->stat_rx_data_pdu_dropped += 1;
                         	rlcP->stat_rx_data_bytes_dropped += tb_ind->size;
 
-                            LOG_W(RLC, "[MSC_NBOX][FRAME %05d][RLC_UM][MOD %02d][RB %02d][Missing SN detected][RLC_UM][MOD %02d][RB %02d]\n",
-                                  frame, rlcP->module_id,rlcP->rb_id, rlcP->module_id,rlcP->rb_id);
                             rlcP->reassembly_missing_sn_detected = 1;
                     }
                 }
@@ -381,8 +381,8 @@ void rlc_um_try_reassembly(rlc_um_entity_t *rlcP, u32_t frame, u8_t eNB_flag, si
             rlcP->dar_buffer[sn] = NULL;
         } else {
             rlcP->last_reassemblied_missing_sn = sn;
-            LOG_W(RLC, "[MSC_NBOX][FRAME %05d][RLC_UM][MOD %02d][RB %02d][Missing SN %04d detected, clearing RX SDU][RLC_UM][MOD %02d][RB %02d]\n",
+            LOG_D(RLC, "[MSC_NBOX][FRAME %05d][RLC_UM][MOD %02d][RB %02d][Missing SN %04d detected, clearing RX SDU][RLC_UM][MOD %02d][RB %02d]\n",
-                                      frame, rlcP->module_id,rlcP->rb_id, sn, rlcP->module_id,rlcP->rb_id);
+		  frame, rlcP->module_id,rlcP->rb_id, sn, rlcP->module_id,rlcP->rb_id);
             rlcP->reassembly_missing_sn_detected = 1;
             rlc_um_clear_rx_sdu(rlcP);
         }

openair2/RRC/LITE/defs.h

@@ -461,6 +461,7 @@ void rrc_eNB_process_MeasurementReport(u8 Mod_id,u16 UE_index,MeasResults_t	 *me
 //void rrc_ue_process_ueCapabilityEnquiry(uint8_t Mod_id,uint32_t frame,UECapabilityEnquiry_t *UECapabilityEnquiry,uint8_t eNB_index);
 //void rrc_ue_process_securityModeCommand(uint8_t Mod_id,uint32_t frame,SecurityModeCommand_t *securityModeCommand,uint8_t eNB_index);
 
+void rrc_remove_UE (u8 Mod_id, u8 UE_id);
 
 #endif
 

targets/RTAI/USER/lte-softmodem.c

@@ -1391,6 +1391,10 @@ int main(int argc, char **argv) {
     //  }
 #endif
 
+#ifdef OPENAIR2
+    init_pdcp_thread(!UE_flag);
+#endif
+
     number_of_cards = openair0_num_detected_cards;
     if (p_exmimo_id->board_exmimoversion==1) //ExpressMIMO1
       openair_daq_vars.timing_advance = 138;
@@ -1665,6 +1669,10 @@ int main(int argc, char **argv) {
 #endif
   }
 
+#ifdef OPENAIR2
+  cleanup_pdcp_thread();
+#endif
+
 #ifdef RTAI
   stop_rt_timer();
 #endif