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38 #include <sys/types.h>
43 #include <sys/queue.h>
46 #include <rte_memory.h>
47 #include <rte_memzone.h>
48 #include <rte_launch.h>
49 #include <rte_common.h>
50 #include <rte_cycles.h>
52 #include <rte_per_lcore.h>
53 #include <rte_lcore.h>
54 #include <rte_atomic.h>
55 #include <rte_debug.h>
56 #include <rte_spinlock.h>
57 #include <rte_branch_prediction.h>
59 #include <rte_mempool.h>
61 #include "eal_private.h"
63 #define LOG_ELT_SIZE 2048
65 #define LOG_HISTORY_MP_NAME "log_history"
67 STAILQ_HEAD(log_history_list, log_history);
70 * The structure of a message log in the log history.
73 STAILQ_ENTRY(log_history) next;
78 static struct rte_mempool *log_history_mp = NULL;
79 static unsigned log_history_size = 0;
80 static struct log_history_list log_history;
82 /* global log structure */
83 struct rte_logs rte_logs = {
85 .level = RTE_LOG_DEBUG,
89 static rte_spinlock_t log_dump_lock = RTE_SPINLOCK_INITIALIZER;
90 static rte_spinlock_t log_list_lock = RTE_SPINLOCK_INITIALIZER;
91 static FILE *default_log_stream;
92 static int history_enabled = 1;
95 * This global structure stores some informations about the message
96 * that is currently beeing processed by one lcore
99 uint32_t loglevel; /**< log level - see rte_log.h */
100 uint32_t logtype; /**< log type - see rte_log.h */
104 static RTE_DEFINE_PER_LCORE(struct log_cur_msg, log_cur_msg);
109 rte_log_add_in_history(const char *buf, size_t size)
111 struct log_history *hist_buf = NULL;
112 static const unsigned hist_buf_size = LOG_ELT_SIZE - sizeof(*hist_buf);
115 if (history_enabled == 0)
118 rte_spinlock_lock(&log_list_lock);
120 /* get a buffer for adding in history */
121 if (log_history_size > RTE_LOG_HISTORY) {
122 hist_buf = STAILQ_FIRST(&log_history);
124 STAILQ_REMOVE_HEAD(&log_history, next);
129 if (rte_mempool_mc_get(log_history_mp, &obj) < 0)
135 if (hist_buf == NULL) {
136 rte_spinlock_unlock(&log_list_lock);
140 /* not enough room for msg, buffer go back in mempool */
141 if (size >= hist_buf_size) {
142 rte_mempool_mp_put(log_history_mp, hist_buf);
143 rte_spinlock_unlock(&log_list_lock);
148 memcpy(hist_buf->buf, buf, size);
149 hist_buf->buf[size] = hist_buf->buf[hist_buf_size-1] = '\0';
150 hist_buf->size = size;
151 STAILQ_INSERT_TAIL(&log_history, hist_buf, next);
153 rte_spinlock_unlock(&log_list_lock);
159 rte_log_set_history(int enable)
161 history_enabled = enable;
164 /* Change the stream that will be used by logging system */
166 rte_openlog_stream(FILE *f)
169 rte_logs.file = default_log_stream;
175 /* Set global log level */
177 rte_set_log_level(uint32_t level)
179 rte_logs.level = (uint32_t)level;
182 /* Get global log level */
184 rte_get_log_level(void)
186 return rte_logs.level;
189 /* Set global log type */
191 rte_set_log_type(uint32_t type, int enable)
194 rte_logs.type |= type;
196 rte_logs.type &= (~type);
199 /* Get global log type */
201 rte_get_log_type(void)
203 return rte_logs.type;
206 /* get the current loglevel for the message beeing processed */
207 int rte_log_cur_msg_loglevel(void)
209 return RTE_PER_LCORE(log_cur_msg).loglevel;
212 /* get the current logtype for the message beeing processed */
213 int rte_log_cur_msg_logtype(void)
215 return RTE_PER_LCORE(log_cur_msg).logtype;
218 /* Dump log history to file */
220 rte_log_dump_history(FILE *out)
222 struct log_history_list tmp_log_history;
223 struct log_history *hist_buf;
226 /* only one dump at a time */
227 rte_spinlock_lock(&log_dump_lock);
229 /* save list, and re-init to allow logging during dump */
230 rte_spinlock_lock(&log_list_lock);
231 tmp_log_history = log_history;
232 STAILQ_INIT(&log_history);
233 log_history_size = 0;
234 rte_spinlock_unlock(&log_list_lock);
236 for (i=0; i<RTE_LOG_HISTORY; i++) {
238 /* remove one message from history list */
239 hist_buf = STAILQ_FIRST(&tmp_log_history);
241 if (hist_buf == NULL)
244 STAILQ_REMOVE_HEAD(&tmp_log_history, next);
246 /* write on stdout */
247 if (fwrite(hist_buf->buf, hist_buf->size, 1, out) == 0) {
248 rte_mempool_mp_put(log_history_mp, hist_buf);
252 /* put back message structure in pool */
253 rte_mempool_mp_put(log_history_mp, hist_buf);
257 rte_spinlock_unlock(&log_dump_lock);
261 * Generates a log message The message will be sent in the stream
262 * defined by the previous call to rte_openlog_stream().
265 rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
268 FILE *f = rte_logs.file;
270 if ((level > rte_logs.level) || !(logtype & rte_logs.type))
273 /* save loglevel and logtype in a global per-lcore variable */
274 RTE_PER_LCORE(log_cur_msg).loglevel = level;
275 RTE_PER_LCORE(log_cur_msg).logtype = logtype;
277 ret = vfprintf(f, format, ap);
283 * Generates a log message The message will be sent in the stream
284 * defined by the previous call to rte_openlog_stream().
285 * No need to check level here, done by rte_vlog().
288 rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
293 va_start(ap, format);
294 ret = rte_vlog(level, logtype, format, ap);
300 * called by environment-specific log init function to initialize log
304 rte_eal_common_log_init(FILE *default_log)
306 STAILQ_INIT(&log_history);
308 /* reserve RTE_LOG_HISTORY*2 elements, so we can dump and
309 * keep logging during this time */
310 log_history_mp = rte_mempool_create(LOG_HISTORY_MP_NAME, RTE_LOG_HISTORY*2,
314 SOCKET_ID_ANY, MEMPOOL_F_NO_PHYS_CONTIG);
316 if ((log_history_mp == NULL) &&
317 ((log_history_mp = rte_mempool_lookup(LOG_HISTORY_MP_NAME)) == NULL)){
318 RTE_LOG(ERR, EAL, "%s(): cannot create log_history mempool\n",
323 default_log_stream = default_log;
324 rte_openlog_stream(default_log);
326 #if RTE_LOG_LEVEL >= RTE_LOG_DEBUG
327 RTE_LOG(NOTICE, EAL, "Debug logs available - lower performance\n");