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openairinterface5g/openair2/LAYER2/NR_MAC_gNB/main.c
T
Robert Schmidt 31a1003349 Introduce mutex for MAC scheduler 
Different threads (e.g., RRC, DU tasks) might access the scheduler at
the same time as the thread that drivers the scheduler itself
(ru_thread). To avoid data races, introduce this mutex.

Most functions of the scheduler are only used internally and have been
marked static in the previous commit. The remaining ones, in this
commit, either lock the scheduler mutex sched_lock, or a comment has
been added of the assumption of how such function is to be locked (e.g.,
if it might be called from different places, or if it is called by a
function that already locks the scheduler).
2023-05-03 13:40:22 +02:00

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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file main.c
* \brief top init of Layer 2
* \author Navid Nikaein and Raymond Knopp, WEI-TAI CHEN
* \date 2010 - 2014, 2018
* \version 1.0
* \company Eurecom, NTUST
* \email: navid.nikaein@eurecom.fr, kroempa@gmail.com
* @ingroup _mac
*/
#include "NR_MAC_gNB/mac_proto.h"
#include "NR_MAC_COMMON/nr_mac_extern.h"
#include "assertions.h"
#include "nr_pdcp/nr_pdcp_oai_api.h"
#include "RRC/NR/nr_rrc_defs.h"
#include "common/utils/LOG/log.h"
#include "nr_rlc/nr_rlc_oai_api.h"
#include "RRC/NR/MESSAGES/asn1_msg.h"
//#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "common/ran_context.h"
#include "executables/softmodem-common.h"
extern RAN_CONTEXT_t RC;
#define MACSTATSSTRLEN 16000
void *nrmac_stats_thread(void *arg) {
gNB_MAC_INST *gNB = (gNB_MAC_INST *)arg;
char output[MACSTATSSTRLEN] = {0};
const char *end = output + MACSTATSSTRLEN;
FILE *file = fopen("nrMAC_stats.log","w");
AssertFatal(file!=NULL,"Cannot open nrMAC_stats.log, error %s\n",strerror(errno));
while (oai_exit == 0) {
char *p = output;
NR_SCHED_LOCK(&gNB->sched_lock);
p += dump_mac_stats(gNB, p, end - p, false);
NR_SCHED_UNLOCK(&gNB->sched_lock);
p += snprintf(p, end - p, "\n");
p += print_meas_log(&gNB->eNB_scheduler, "DL & UL scheduling timing", NULL, NULL, p, end - p);
p += print_meas_log(&gNB->schedule_dlsch, "dlsch scheduler", NULL, NULL, p, end - p);
p += print_meas_log(&gNB->rlc_data_req, "rlc_data_req", NULL, NULL, p, end - p);
p += print_meas_log(&gNB->rlc_status_ind, "rlc_status_ind", NULL, NULL, p, end - p);
fwrite(output, p - output, 1, file);
fflush(file);
sleep(1);
fseek(file,0,SEEK_SET);
}
fclose(file);
return NULL;
}
void clear_mac_stats(gNB_MAC_INST *gNB) {
UE_iterator(gNB->UE_info.list, UE) {
memset(&UE->mac_stats,0,sizeof(UE->mac_stats));
}
}
size_t dump_mac_stats(gNB_MAC_INST *gNB, char *output, size_t strlen, bool reset_rsrp)
{
int num = 1;
const char *begin = output;
const char *end = output + strlen;
/* this function is called from gNB_dlsch_ulsch_scheduler(), so assumes the
* scheduler to be locked*/
NR_SCHED_ENSURE_LOCKED(&gNB->sched_lock);
NR_SCHED_LOCK(&gNB->UE_info.mutex);
UE_iterator(gNB->UE_info.list, UE) {
NR_UE_sched_ctrl_t *sched_ctrl = &UE->UE_sched_ctrl;
NR_mac_stats_t *stats = &UE->mac_stats;
const int avg_rsrp = stats->num_rsrp_meas > 0 ? stats->cumul_rsrp / stats->num_rsrp_meas : 0;
output += snprintf(output,
end - output,
"UE RNTI %04x (%d) PH %d dB PCMAX %d dBm, average RSRP %d (%d meas)\n",
UE->rnti,
num++,
sched_ctrl->ph,
sched_ctrl->pcmax,
avg_rsrp,
stats->num_rsrp_meas);
output += snprintf(output,
end - output,
"UE %04x: CQI %d, RI %d, PMI (%d,%d)\n",
UE->rnti,
sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.wb_cqi_1tb,
sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.ri+1,
sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.pmi_x1,
sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.pmi_x2);
if (stats->srs_stats[0] != '\0') {
output += snprintf(output, end - output, "UE %04x: %s\n", UE->rnti, stats->srs_stats);
}
output += snprintf(output,
end - output,
"UE %04x: dlsch_rounds ", UE->rnti);
output += snprintf(output, end - output, "%"PRIu64, stats->dl.rounds[0]);
for (int i = 1; i < gNB->dl_bler.harq_round_max; i++)
output += snprintf(output, end - output, "/%"PRIu64, stats->dl.rounds[i]);
output += snprintf(output,
end - output,
", dlsch_errors %"PRIu64", pucch0_DTX %d, BLER %.5f MCS %d\n",
stats->dl.errors,
stats->pucch0_DTX,
sched_ctrl->dl_bler_stats.bler,
sched_ctrl->dl_bler_stats.mcs);
if (reset_rsrp) {
stats->num_rsrp_meas = 0;
stats->cumul_rsrp = 0;
}
output += snprintf(output,
end - output,
"UE %04x: dlsch_total_bytes %"PRIu64"\n",
UE->rnti, stats->dl.total_bytes);
output += snprintf(output,
end - output,
"UE %04x: ulsch_rounds ", UE->rnti);
output += snprintf(output, end - output, "%"PRIu64, stats->ul.rounds[0]);
for (int i = 1; i < gNB->ul_bler.harq_round_max; i++)
output += snprintf(output, end - output, "/%"PRIu64, stats->ul.rounds[i]);
output += snprintf(output,
end - output,
", ulsch_DTX %d, ulsch_errors %"PRIu64", BLER %.5f MCS %d\n",
stats->ulsch_DTX,
stats->ul.errors,
sched_ctrl->ul_bler_stats.bler,
sched_ctrl->ul_bler_stats.mcs);
output += snprintf(output,
end - output,
"UE %04x: ulsch_total_bytes_scheduled %"PRIu64", ulsch_total_bytes_received %"PRIu64"\n",
UE->rnti,
stats->ulsch_total_bytes_scheduled, stats->ul.total_bytes);
for (int lc_id = 0; lc_id < 63; lc_id++) {
if (stats->dl.lc_bytes[lc_id] > 0)
output += snprintf(output,
end - output,
"UE %04x: LCID %d: %"PRIu64" bytes TX\n",
UE->rnti,
lc_id,
stats->dl.lc_bytes[lc_id]);
if (stats->ul.lc_bytes[lc_id] > 0)
output += snprintf(output,
end - output,
"UE %04x: LCID %d: %"PRIu64" bytes RX\n",
UE->rnti,
lc_id,
stats->ul.lc_bytes[lc_id]);
}
}
NR_SCHED_UNLOCK(&gNB->UE_info.mutex);
return output - begin;
}
static void mac_rrc_init(gNB_MAC_INST *mac, ngran_node_t node_type)
{
switch (node_type) {
case ngran_gNB_CU:
AssertFatal(1 == 0, "nothing to do for CU\n");
break;
case ngran_gNB_DU:
mac_rrc_ul_f1ap_init(&mac->mac_rrc);
break;
case ngran_gNB:
mac_rrc_ul_direct_init(&mac->mac_rrc);
break;
default:
AssertFatal(0 == 1, "Unknown node type %d\n", node_type);
break;
}
}
void mac_top_init_gNB(ngran_node_t node_type)
{
module_id_t i;
gNB_MAC_INST *nrmac;
LOG_I(MAC, "[MAIN] Init function start:nb_nr_macrlc_inst=%d\n",RC.nb_nr_macrlc_inst);
if (RC.nb_nr_macrlc_inst > 0) {
RC.nrmac = (gNB_MAC_INST **) malloc16(RC.nb_nr_macrlc_inst *sizeof(gNB_MAC_INST *));
AssertFatal(RC.nrmac != NULL,"can't ALLOCATE %zu Bytes for %d gNB_MAC_INST with size %zu \n",
RC.nb_nr_macrlc_inst * sizeof(gNB_MAC_INST *),
RC.nb_nr_macrlc_inst, sizeof(gNB_MAC_INST));
for (i = 0; i < RC.nb_nr_macrlc_inst; i++) {
RC.nrmac[i] = (gNB_MAC_INST *) malloc16(sizeof(gNB_MAC_INST));
AssertFatal(RC.nrmac != NULL,"can't ALLOCATE %zu Bytes for %d gNB_MAC_INST with size %zu \n",
RC.nb_nr_macrlc_inst * sizeof(gNB_MAC_INST *),
RC.nb_nr_macrlc_inst, sizeof(gNB_MAC_INST));
LOG_D(MAC,"[MAIN] ALLOCATE %zu Bytes for %d gNB_MAC_INST @ %p\n",sizeof(gNB_MAC_INST), RC.nb_nr_macrlc_inst, RC.mac);
bzero(RC.nrmac[i], sizeof(gNB_MAC_INST));
RC.nrmac[i]->Mod_id = i;
RC.nrmac[i]->tag = (NR_TAG_t*)malloc(sizeof(NR_TAG_t));
memset((void*)RC.nrmac[i]->tag,0,sizeof(NR_TAG_t));
RC.nrmac[i]->ul_handle = 0;
RC.nrmac[i]->first_MIB = true;
pthread_mutex_init(&RC.nrmac[i]->sched_lock, NULL);
pthread_mutex_init(&RC.nrmac[i]->UE_info.mutex, NULL);
uid_linear_allocator_init(&RC.nrmac[i]->UE_info.uid_allocator);
if (get_softmodem_params()->phy_test) {
RC.nrmac[i]->pre_processor_dl = nr_preprocessor_phytest;
RC.nrmac[i]->pre_processor_ul = nr_ul_preprocessor_phytest;
} else {
RC.nrmac[i]->pre_processor_dl = nr_init_fr1_dlsch_preprocessor(0);
RC.nrmac[i]->pre_processor_ul = nr_init_fr1_ulsch_preprocessor(0);
}
if (!IS_SOFTMODEM_NOSTATS_BIT)
threadCreate(&RC.nrmac[i]->stats_thread, nrmac_stats_thread, (void*)RC.nrmac[i], "MAC_STATS", -1, sched_get_priority_min(SCHED_OAI)+1 );
mac_rrc_init(RC.nrmac[i], node_type);
}//END for (i = 0; i < RC.nb_nr_macrlc_inst; i++)
AssertFatal(rlc_module_init(1) == 0,"Could not initialize RLC layer\n");
// These should be out of here later
if (get_softmodem_params()->usim_test == 0 ) nr_pdcp_layer_init();
if(IS_SOFTMODEM_NOS1 && get_softmodem_params()->phy_test) {
// get default noS1 configuration
NR_RadioBearerConfig_t *rbconfig = NULL;
NR_RLC_BearerConfig_t *rlc_rbconfig = NULL;
fill_nr_noS1_bearer_config(&rbconfig, &rlc_rbconfig);
NR_RLC_BearerConfig_t *rlc_rbconfig_list[1] = {rlc_rbconfig};
struct NR_CellGroupConfig__rlc_BearerToAddModList rlc_bearer_list = {
.list = { .array = rlc_rbconfig_list, .count = 1, .size = 1, }
};
/* Note! previously, in nr_DRB_preconfiguration(), we passed ENB_FLAG_NO
* if ENB_NAS_USE_TUN was *not* set. It seems to me that we could not set
* this flag anywhere in the code, hence we would always configure PDCP
* with ENB_FLAG_NO in nr_DRB_preconfiguration(). This makes sense for
* noS1, because the result of passing ENB_FLAG_NO to PDCP is that PDCP
* will output the packets at a local interface, which is in line with
* the noS1 mode. Hence, below, we simply hardcode ENB_FLAG_NO */
// setup PDCP, RLC
nr_pdcp_add_drbs(ENB_FLAG_NO, 0x1234, 0, rbconfig->drb_ToAddModList, 0, NULL, NULL, &rlc_bearer_list);
nr_rlc_add_drb(0x1234, rbconfig->drb_ToAddModList->list.array[0]->drb_Identity, rlc_rbconfig);
// free memory
free_nr_noS1_bearer_config(&rbconfig, &rlc_rbconfig);
}
} else {
RC.nrmac = NULL;
}
// Initialize Linked-List for Active UEs
for (i = 0; i < RC.nb_nr_macrlc_inst; i++) {
nrmac = RC.nrmac[i];
nrmac->if_inst = NR_IF_Module_init(i);
memset(&nrmac->UE_info, 0, sizeof(nrmac->UE_info));
}
srand48(0);
}
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