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pespin gerrit-no-reply at lists.osmocom.orgpespin has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/19442 )
Change subject: WIP: vty: Introduce support to set cpu-affinity and scheduler policy
......................................................................
WIP: vty: Introduce support to set cpu-affinity and scheduler policy
Process willing to support this kind of configuration through VTY simply
need to call "osmo_sched_vty_init(tall_ctx);" during startup to register
the commands.
For multithreaded processes, new threads willing to get their
cpu-affinity mask according to VTY config should call
osmo_sched_vty_apply_localthread() (potentially after
setting the thread name through pthread_setname_np()).
Related: SYS#4986
Change-Id: If76a4bd2cc7b3c7adf5d84790a944d78be70e10a
---
M include/Makefile.am
M include/osmocom/vty/command.h
A include/osmocom/vty/sched_vty.h
M src/vty/Makefile.am
A src/vty/sched_vty.c
5 files changed, 600 insertions(+), 1 deletion(-)
git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/42/19442/1
diff --git a/include/Makefile.am b/include/Makefile.am
index 7af7e01..097f34d 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -164,6 +164,7 @@
osmocom/vty/vector.h \
osmocom/vty/vty.h \
osmocom/vty/ports.h \
+ osmocom/vty/sched_vty.h \
osmocom/vty/tdef_vty.h \
osmocom/ctrl/control_vty.h
endif
diff --git a/include/osmocom/vty/command.h b/include/osmocom/vty/command.h
index 29206ce..338400f 100644
--- a/include/osmocom/vty/command.h
+++ b/include/osmocom/vty/command.h
@@ -97,6 +97,7 @@
L_CS7_SCCPADDR_NODE, /*!< SS7 SCCP Address */
L_CS7_SCCPADDR_GT_NODE, /*!< SS7 SCCP Global Title */
+ L_SCHED_NODE, /*!< CPU Sched related options node */
/*
* When adding new nodes to the libosmocore project, these nodes can be
* used to avoid ABI changes for unrelated projects.
diff --git a/include/osmocom/vty/sched_vty.h b/include/osmocom/vty/sched_vty.h
new file mode 100644
index 0000000..6de2914
--- /dev/null
+++ b/include/osmocom/vty/sched_vty.h
@@ -0,0 +1,37 @@
+/*! \file sched_vty.h
+ * API to CPU / Threading / Scheduler properties from VTY configuration.
+ */
+/* (C) 2020 by sysmocom - s.f.m.c. GmbH <info at sysmocom.de>
+ *
+ * Author: Pau Espin Pedrol <pespin at sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#pragma once
+
+#include <osmocom/vty/command.h>
+
+/*! \defgroup sched_VTY Configuration
+ * @{
+ * \file sched_vty.h
+ */
+
+void osmo_sched_vty_init(void *tall_ctx);
+int osmo_sched_vty_apply_localthread(void);
+
+/*! @} */
diff --git a/src/vty/Makefile.am b/src/vty/Makefile.am
index 35350cc..5527449 100644
--- a/src/vty/Makefile.am
+++ b/src/vty/Makefile.am
@@ -12,7 +12,7 @@
libosmovty_la_SOURCES = buffer.c command.c vty.c vector.c utils.c \
telnet_interface.c logging_vty.c stats_vty.c \
fsm_vty.c talloc_ctx_vty.c \
- tdef_vty.c
+ sched_vty.c tdef_vty.c
libosmovty_la_LDFLAGS = -version-info $(LIBVERSION) -no-undefined
libosmovty_la_LIBADD = $(top_builddir)/src/libosmocore.la $(TALLOC_LIBS)
endif
diff --git a/src/vty/sched_vty.c b/src/vty/sched_vty.c
new file mode 100644
index 0000000..54d7f2a
--- /dev/null
+++ b/src/vty/sched_vty.c
@@ -0,0 +1,560 @@
+/*! \file sched_vty.c
+ * Implementation to CPU / Threading / Scheduler properties from VTY configuration.
+ */
+/* (C) 2020 by sysmocom - s.f.m.c. GmbH <info at sysmocom.de>
+ *
+ * Author: Pau Espin Pedrol <pespin at sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPLv2+
+ */
+
+#define _GNU_SOURCE
+
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include <unistd.h>
+#include <sched.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <pthread.h>
+#include <inttypes.h>
+
+#include <osmocom/vty/vty.h>
+#include <osmocom/vty/command.h>
+#include <osmocom/vty/tdef_vty.h>
+#include <osmocom/core/tdef.h>
+#include <osmocom/core/fsm.h>
+#include <osmocom/core/linuxlist.h>
+
+/*! \addtogroup Tdef_VTY
+ *
+ * CPU Scheduling related VTY API.
+ *
+ * @{
+ * \file sched_vty.c
+ */
+
+enum sched_vty_thread_id {
+ SCHED_VTY_THREAD_SELF,
+ SCHED_VTY_THREAD_ALL,
+ SCHED_VTY_THREAD_ID,
+ SCHED_VTY_THREAD_NAME,
+ SCHED_VTY_THREAD_UNKNOWN,
+};
+
+struct cpu_affinity_it {
+ struct llist_head entry;
+ enum sched_vty_thread_id tid_type;
+ char bufname[64];
+ unsigned long mask;
+ bool delay;
+};
+
+struct sched_vty_opts {
+ void *tall_ctx;
+ int sched_rr_prio;
+ struct llist_head cpu_affinity_li;
+ pthread_mutex_t cpu_affinity_li_mutex;
+};
+
+
+static struct sched_vty_opts *sched_vty_opts;
+
+static struct cmd_node sched_node = {
+ L_SCHED_NODE,
+ "%s(config-sched)# ",
+ 1,
+};
+
+static bool proc_tid_exists(pid_t tid)
+{
+ DIR *proc_dir;
+ struct dirent *entry;
+ char dirname[100];
+ int tid_it;
+ bool found = false;
+
+ snprintf(dirname, sizeof(dirname), "/proc/%ld/task", (long int)getpid());
+ proc_dir = opendir(dirname);
+ if (!proc_dir)
+ return false; /*FIXME; print error */
+
+ while ((entry = readdir(proc_dir)))
+ {
+ if(entry->d_name[0] == '.')
+ continue;
+ tid_it = atoi(entry->d_name);
+ if (tid_it == tid) {
+ found = true;
+ break;
+ }
+ }
+
+ closedir(proc_dir);
+ return found;
+}
+
+static bool proc_name_exists(const char *name, pid_t *res_pid)
+{
+ DIR *proc_dir;
+ struct dirent *entry;
+ char path[100];
+ char buf[17]; /* 15 + \n + \0 */
+ int tid_it;
+ int fd;
+ pid_t mypid = getpid();
+ bool found = false;
+ int rc;
+
+ *res_pid = 0;
+
+ snprintf(path, sizeof(path), "/proc/%ld/task", (long int)mypid);
+ proc_dir = opendir(path);
+ if (!proc_dir)
+ return false;
+
+ while ((entry = readdir(proc_dir)))
+ {
+ if(entry->d_name[0] == '.')
+ continue;
+
+ tid_it = atoi(entry->d_name);
+ snprintf(path, sizeof(path), "/proc/%ld/task/%ld/comm", (long int)mypid, (long int) tid_it);
+ if ((fd = open(path, O_RDONLY)) == -1)
+ continue;
+ rc = read(fd, buf, sizeof(buf));
+ if (rc >= 0) {
+ /* Last char contain a '\n', get rid of it */
+ buf[rc-1] = '\0';
+ buf[rc] = '\0';
+ if (strcmp(name, buf) == 0) {
+ *res_pid = tid_it;
+ found = true;
+ }
+ }
+ close(fd);
+
+ if (found)
+ break;
+ }
+
+ closedir(proc_dir);
+ return found;
+}
+
+static enum sched_vty_thread_id procname2pid(pid_t *res_pid, const char *str, bool applynow)
+{
+ size_t i, len;
+ char *end;
+ bool is_pid = true;
+
+ if (strcmp(str, "all") == 0) {
+ *res_pid = 0;
+ return SCHED_VTY_THREAD_ALL;
+ }
+
+ if (strcmp(str, "self") == 0) {
+ *res_pid = 0;
+ return SCHED_VTY_THREAD_SELF;
+ }
+
+ len = strlen(str);
+ for (i = 0; i < len; i++) {
+ if (!isdigit(str[i])) {
+ is_pid = false;
+ break;
+ }
+ }
+ if (is_pid) {
+ errno = 0;
+ *res_pid = strtoul(str, &end, 0);
+ if ((errno == ERANGE && *res_pid == ULONG_MAX) || (errno && !*res_pid) ||
+ str == end) {
+ return SCHED_VTY_THREAD_UNKNOWN;
+ }
+ if (!applynow || proc_tid_exists(*res_pid))
+ return SCHED_VTY_THREAD_ID;
+ else
+ return SCHED_VTY_THREAD_UNKNOWN;
+ }
+
+ if (len > 15) {
+ /* Thread names only allow up to 15+1 null chars, see man pthread_setname_np */
+ return SCHED_VTY_THREAD_UNKNOWN;
+ }
+
+ if (applynow) {
+ if (proc_name_exists(str, res_pid))
+ return SCHED_VTY_THREAD_NAME;
+ else
+ return SCHED_VTY_THREAD_UNKNOWN;
+ } else {
+ /* assume a thread will be named after it */
+ *res_pid = 0;
+ return SCHED_VTY_THREAD_NAME;
+ }
+}
+
+int my_sched_setaffinity(enum sched_vty_thread_id tid_type, pid_t pid, unsigned long mask)
+{
+ DIR *proc_dir;
+ struct dirent *entry;
+ char dirname[100];
+ int tid_it;
+ int rc = 0;
+ unsigned long mask_tmp;
+ cpu_set_t *cpuset;
+ size_t cpuset_size;
+ unsigned int cpu_i = 0;
+
+ cpuset = CPU_ALLOC(64);
+ cpuset_size = CPU_ALLOC_SIZE(64);
+ CPU_ZERO_S(cpuset_size, cpuset);
+ mask_tmp = mask;
+ while (mask_tmp) {
+ if (mask_tmp & 0x01)
+ CPU_SET_S(cpu_i, cpuset_size, cpuset);
+ mask_tmp >>= 1;
+ cpu_i++;
+ }
+
+ if (tid_type != SCHED_VTY_THREAD_ALL) {
+ LOGP(DLGLOBAL, LOGL_NOTICE, "Setting CPU affinity mask for tid %lu to: 0x%lx\n",
+ (unsigned long) pid, mask);
+
+ rc = sched_setaffinity(pid, sizeof(cpu_set_t), cpuset);
+ CPU_FREE(cpuset);
+ return rc;
+ }
+
+ snprintf(dirname, sizeof(dirname), "/proc/%ld/task", (long int)getpid());
+ proc_dir = opendir(dirname);
+ if (!proc_dir) {
+ CPU_FREE(cpuset);
+ return -EINVAL;
+ }
+
+ while ((entry = readdir(proc_dir)))
+ {
+ if(entry->d_name[0] == '.')
+ continue;
+ tid_it = atoi(entry->d_name);
+ LOGP(DLGLOBAL, LOGL_NOTICE, "Setting CPU affinity mask for tid %lu to: 0x%lx\n",
+ (unsigned long) tid_it, mask);
+
+ rc = sched_setaffinity(tid_it, sizeof(cpu_set_t), cpuset);
+ if (rc == -1)
+ break;
+ }
+
+ closedir(proc_dir);
+ CPU_FREE(cpuset);
+ return rc;
+
+}
+
+DEFUN(cfg_sched_cpu_affinity, cfg_sched_cpu_affinity_cmd,
+ "cpu-affinity (self|all|<0-4294967295>|THREADNAME) <0x00-0xffffffffffffffff> [delay]", /* Allow up to 64 CPUs */
+ "Set Target thread to apply the CPU affinty mask\n"
+ "Set CPU affinity mask of the thread\n"
+ "CPU affinity mask\n"
+ "If set, delay applying the affinity mask now and let the app handle it at a later point\n")
+{
+ unsigned long mask;
+ const char* str_who = argv[0];
+ const char *str_mask = argv[1];
+ bool applynow = (argc != 3);
+ char *end;
+ int rc;
+ pid_t pid;
+ enum sched_vty_thread_id tid_type;
+ struct cpu_affinity_it *it, *it_next;
+
+ tid_type = procname2pid(&pid, str_who, applynow);
+ if (tid_type == SCHED_VTY_THREAD_UNKNOWN) {
+ vty_out(vty, "%% Failed parsing target thread %s%s",
+ str_who, VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ if (tid_type == SCHED_VTY_THREAD_ID && !applynow) {
+ vty_out(vty, "%% It makes no sense to delay applying cpu-affinity on tid %lu%s",
+ (unsigned long)pid, VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+ if (tid_type == SCHED_VTY_THREAD_ALL && !applynow) {
+ vty_out(vty, "%% It makes no sense to delay applying cpu-affinity on all threads%s",
+ VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ errno = 0;
+ mask = strtoul(str_mask, &end, 0);
+ if ((errno == ERANGE && mask == ULONG_MAX) || (errno && !mask) ||
+ str_mask == end) {
+ vty_out(vty, "%% Failed parsing CPU Affinity Mask %s%s",
+ str_mask, VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ if (applynow) {
+ rc = my_sched_setaffinity(tid_type, pid, mask);
+ if (rc == -1) {
+ vty_out(vty, "%% Failed setting sched CPU Affinity Mask 0x%lx: %s%s",
+ mask, strerror(errno), VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+ }
+
+ /* Keep history of cmds applied to be able to rewrite config. If PID was passed
+ directly it makes no sense to store it since PIDs are temporary */
+ if (tid_type == SCHED_VTY_THREAD_SELF ||
+ tid_type == SCHED_VTY_THREAD_ALL ||
+ tid_type == SCHED_VTY_THREAD_NAME) {
+ pthread_mutex_lock(&sched_vty_opts->cpu_affinity_li_mutex);
+
+ /* Drop previous entries matching, since they will be overwritten */
+ llist_for_each_entry_safe(it, it_next, &sched_vty_opts->cpu_affinity_li, entry) {
+ if (strcmp(it->bufname, str_who) == 0) {
+ llist_del(&it->entry);
+ talloc_free(it);
+ break;
+ }
+ }
+ it = talloc_zero(sched_vty_opts->tall_ctx, struct cpu_affinity_it);
+ OSMO_STRLCPY_ARRAY(it->bufname, str_who);
+ it->tid_type = tid_type;
+ it->mask = mask;
+ it->delay = !applynow;
+ llist_add_tail(&it->entry, &sched_vty_opts->cpu_affinity_li);
+
+ pthread_mutex_unlock(&sched_vty_opts->cpu_affinity_li_mutex);
+ }
+
+ return CMD_SUCCESS;
+}
+
+static int set_sched_rr(unsigned int prio)
+{
+ struct sched_param param;
+ int rc;
+ memset(¶m, 0, sizeof(param));
+ param.sched_priority = prio;
+ LOGP(DLGLOBAL, LOGL_NOTICE, "Setting SCHED_RR priority %d\n", param.sched_priority);
+ rc = sched_setscheduler(getpid(), SCHED_RR, ¶m);
+ if (rc == -1) {
+ LOGP(DLGLOBAL, LOGL_FATAL, "Setting SCHED_RR priority %d failed: %s\n",
+ param.sched_priority, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+DEFUN(cfg_sched_policy, cfg_sched_policy_cmd,
+ "policy rr <1-32>",
+ "Set the scheduling policy to use for the process\n"
+ "Use the SCHED_RR real-time scheduling algorithm\n"
+ "Use the SCHED_RR real-time priority\n"
+ "Real time priority\n")
+{
+ sched_vty_opts->sched_rr_prio = atoi(argv[0]);
+
+ if (set_sched_rr(sched_vty_opts->sched_rr_prio) < 0) {
+ vty_out(vty, "%% Failed setting SCHED_RR priority %d%s",
+ sched_vty_opts->sched_rr_prio, VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ return CMD_SUCCESS;
+}
+
+DEFUN(cfg_sched,
+ cfg_sched_cmd,
+ "sched", "Configure CPU Scheduler related settings")
+{
+ vty->index = NULL;
+ vty->node = L_SCHED_NODE;
+
+ return CMD_SUCCESS;
+}
+
+DEFUN(show_sched_threads, show_sched_threads_cmd,
+ "show sched threads",
+ SHOW_STR
+ "Show Sched section information\n"
+ "Show information about running threads)\n")
+{
+ DIR *proc_dir;
+ struct dirent *entry;
+ char path[100];
+ char buf[16];
+ int tid_it;
+ int fd;
+ pid_t mypid = getpid();
+ int rc;
+ uint64_t mask;
+ cpu_set_t *cpuset;
+ unsigned int cpu_i;
+
+ vty_out(vty, "Thread list for PID %lu:%s", (unsigned long) mypid, VTY_NEWLINE);
+
+ snprintf(path, sizeof(path), "/proc/%ld/task", (long int)mypid);
+ proc_dir = opendir(path);
+ if (!proc_dir) {
+ vty_out(vty, "%% Failed opening dir%s%s", buf, VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ while ((entry = readdir(proc_dir)))
+ {
+ if(entry->d_name[0] == '.')
+ continue;
+
+ tid_it = atoi(entry->d_name);
+ snprintf(path, sizeof(path), "/proc/%ld/task/%ld/comm", (long int)mypid, (long int) tid_it);
+ if ((fd = open(path, O_RDONLY)) != -1) {
+ rc = read(fd, buf, sizeof(buf));
+ if (rc >= 0) {
+ /* Last char contain a '\n', get rid of it */
+ buf[rc-1] = '\0';
+ }
+ close(fd);
+ } else {
+ buf[0] = '\0';
+ }
+
+ mask = 0;
+ cpuset = CPU_ALLOC(64);
+ CPU_ZERO_S(CPU_ALLOC_SIZE(64), cpuset);
+ if (sched_getaffinity(tid_it, CPU_ALLOC_SIZE(64), cpuset) == 0) {
+ for (cpu_i = 0; cpu_i < 64; cpu_i++) {
+ if (CPU_ISSET(cpu_i, cpuset))
+ mask |= (1 << cpu_i);
+ }
+ }
+ CPU_FREE(cpuset);
+
+ vty_out(vty, " TID: %lu, NAME: '%s', cpu-affinity: 0x%" PRIx64 "%s", (unsigned long) tid_it, buf, mask, VTY_NEWLINE);
+ }
+
+ closedir(proc_dir);
+ return CMD_SUCCESS;
+}
+
+static int config_write_sched(struct vty *vty)
+{
+ struct cpu_affinity_it *it;
+
+ /* Only add the node if there's something to write under it */
+ if (sched_vty_opts->sched_rr_prio || !llist_empty(&sched_vty_opts->cpu_affinity_li))
+ vty_out(vty, "sched%s", VTY_NEWLINE);
+
+ if (sched_vty_opts->sched_rr_prio)
+ vty_out(vty, " policy rr %d%s", sched_vty_opts->sched_rr_prio, VTY_NEWLINE);
+
+ llist_for_each_entry(it, &sched_vty_opts->cpu_affinity_li, entry) {
+ vty_out(vty, " cpu-affinity %s 0x%lx%s%s", it->bufname, it->mask,
+ it->delay ? " delay" : "", VTY_NEWLINE);
+ }
+
+ return CMD_SUCCESS;
+}
+
+/*! Initialize sched VTY nodes
+ * \param[in] vty VTY context for vty_out() of error messages.
+ * \param[in] tdefs Array of timer definitions to look up T timer.
+ * \param[in] T_str Argument string. It is not validated, expected to be checked by VTY input.
+ * \return 0 on success, non-zero on error.
+ */
+int osmo_sched_vty_init(void *tall_ctx)
+{
+ OSMO_ASSERT(!sched_vty_opts); /* assert only called once */
+
+ sched_vty_opts = talloc_zero(tall_ctx, struct sched_vty_opts);
+ sched_vty_opts->tall_ctx = tall_ctx;
+ INIT_LLIST_HEAD(&sched_vty_opts->cpu_affinity_li);
+ pthread_mutex_init(&sched_vty_opts->cpu_affinity_li_mutex, NULL);
+
+ install_element(CONFIG_NODE, &cfg_sched_cmd);
+ install_node(&sched_node, config_write_sched);
+
+ install_element(L_SCHED_NODE, &cfg_sched_policy_cmd);
+ install_element(L_SCHED_NODE, &cfg_sched_cpu_affinity_cmd);
+
+ install_element_ve(&show_sched_threads_cmd);
+ return 0;
+}
+
+/*! Apply cpu-affinity on calling thread based on VTY configuration
+ * \return 0 on success, non-zero on error.
+ */
+int osmo_sched_vty_apply_localthread(void)
+{
+ struct cpu_affinity_it *it;
+ char name[17]; /* 15 + \n + \0 */
+ bool has_name = false;
+ bool mask_found = false;
+ unsigned long mask;
+ int rc;
+
+ /* Assert subsystem was inited and structs are preset */
+ OSMO_ASSERT(sched_vty_opts);
+
+ if (pthread_getname_np(pthread_self(), name, sizeof(name)) == 0)
+ has_name = true;
+
+ /* Get latest matching mask for the thread */
+ pthread_mutex_lock(&sched_vty_opts->cpu_affinity_li_mutex);
+ llist_for_each_entry(it, &sched_vty_opts->cpu_affinity_li, entry) {
+ switch (it->tid_type) {
+ case SCHED_VTY_THREAD_SELF:
+ continue; /* self to the VTY thread, not us */
+ case SCHED_VTY_THREAD_ALL:
+ mask_found = true;
+ mask = it->mask;
+ break;
+ case SCHED_VTY_THREAD_NAME:
+ if (!has_name)
+ continue;
+ if (strcmp(name, it->bufname) != 0)
+ continue;
+ mask_found = true;
+ mask = it->mask;
+ break;
+ default:
+ OSMO_ASSERT(0);
+ }
+ }
+ pthread_mutex_unlock(&sched_vty_opts->cpu_affinity_li_mutex);
+
+ if (!mask_found)
+ return 0;
+
+ rc = my_sched_setaffinity(SCHED_VTY_THREAD_SELF, 0, mask);
+ if (rc == -1)
+ LOGP(DLGLOBAL, LOGL_FATAL, "Setting cpu-affinity mask 0x%lx failed: %s\n",
+ mask, strerror(errno));
+ return rc;
+}
+
+/*! @} */
--
To view, visit https://gerrit.osmocom.org/c/libosmocore/+/19442
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: If76a4bd2cc7b3c7adf5d84790a944d78be70e10a
Gerrit-Change-Number: 19442
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
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