Add side files of personal study

Q&A.md

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+# Q&A:
+
+- What RTAI (Real-Time Application Interface) is? 
+	- parece ser um concorrente do pthread
+- O que é OPP?
+- O que é VCD e os sinais em vcd_signal_dumper.c servem para que?
+- O que é o DEAD_LINE_SCHEDULER? e qual está habilitado por defaul?

lte_softmodem.md

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+
+# Functions of the lte_softmode:
+
+* void signal_handler(int sig)
+* void reset_stats(FL_OBJECT *button, long arg)
+* static void *scope_thread(void *arg)
+* void* gps_thread (void *arg)
+* void *emos_thread (void *arg)
+* static void wait_system_ready (char *message, volatile int *start_flag)
+* void *l2l1_task(void *arg)
+* void do_OFDM_mod_rt(int subframe,PHY_VARS_eNB *phy_vars_eNB)
+* static void* eNB_thread_tx( void* param )
+* static void* eNB_thread_rx( void* param )
+* void init_eNB_proc(void)
+* void kill_eNB_proc(void)
+* static void* eNB_thread( void* arg )
+* static void get_options (int argc, char **argv)
+* int setup_eNB_buffers(PHY_VARS_eNB **phy_vars_eNB, openair0_config_t * *openair0_cfg, openair0_rf_map rf_map[MAX_NUM_CCs])
+* void reset_opp_meas(void) {
+* void print_opp_meas(void) {
+
+# Where threads are created? and what they do?
+
+* In init_eNB_proc:
+	* eNB_thread_tx : created @ 1641, defined @ 1064 - 1064+295
+		* Configure the thread affinity
+		* Do mutex and condition stuff
+		* phy_procedures_eNB_TX() @ 1255 => ???
+		* do_OFDM_mod_rt() @ 1273 => ???
+	* eNB_thread_rx : created @ 1642, defined @ 1367
+		* Configure the thread affinity
+		* Do mutex and condition stuff
+		* when subframe == S_FS 
+			* phy_procedures_eNB_S_RX
+		* when subframe == S_UL 
+			* phy_procedures_eNB_RX
+* In main:
+	* scope_thread : created @ 3666, defined @ 550
+	* emos_thread  : created @ 3677, defined @ 719
+	* gps_thread   : created @ 3679, defined @ 649
+	* UE_thread    : created @ 3717, defined @ extern
+	* eNB_thread   : created @ 3750, defined @ 1770 - 1770+542
+		* Get/Send Samples to the RF frontend
+		* process the mutex lock
+		* Execute Debug and Log procedures
+
+# Main function from 2863 - 3916 :
+
+```
+	Initial Setup of parameters:
+	logInit() => ???
+	Get Command Line Parametes
+	T_init() => ???
+	set_glog() => Initialize the logs, see log.h for details
+	set_taus_seed() => 
+	set_comp_log() => ??? 
+		::: for HW, PHY, OPT ...
+	vcd_signal_dumper() => ??? 
+		::: /tmp/openair_dump_UE.vcd and /tmp/openair_dump_eNB.vcd
+	reset_opp_meas() => ???
+
+lte_softmodem.c:3004 TODO: continue
+```
+