ceph/src/dpdk/examples/performance-thread/common/lthread_diag_api.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #ifndef LTHREAD_DIAG_API_H_
  34 #define LTHREAD_DIAG_API_H_
  35
  36 #include <stdint.h>
  37 #include <inttypes.h>
  38
  39 /*
  40  * Enable diagnostics
  41  * 0 = conditionally compiled out
  42  * 1 = compiled in and maskable at run time, see below for details
  43  */
  44 #define LTHREAD_DIAG 0
  45
  46 /**
  47  *
  48  * @file lthread_diag_api.h
  49  *
  50  * @warning
  51  * @b EXPERIMENTAL: this API may change without prior notice
  52  *
  53  * lthread diagnostic interface
  54  *
  55  * If enabled via configuration file option ( tbd ) the lthread subsystem
  56  * can generate selected trace information, either RTE_LOG  (INFO) messages,
  57  * or else invoke a user supplied callback function when any of the events
  58  * listed below occur.
  59  *
  60  * Reporting of events can be selectively masked, the bit position in the
  61  * mask is determined by the corresponding event identifier listed below.
  62  *
  63  * Diagnostics are enabled by registering the callback function and mask
  64  * using the API lthread_diagnostic_enable().
  65  *
  66  * Various interesting parameters are passed to the callback, including the
  67  * time in cpu clks, the lthread id, the diagnostic event id, a user ref value,
  68  * event text string, object being traced, and two context dependent parameters
  69  * (p1 and p2). The meaning of the two parameters p1 and p2 depends on
  70  * the specific event.
  71  *
  72  * The events LT_DIAG_LTHREAD_CREATE, LT_DIAG_MUTEX_CREATE and
  73  * LT_DIAG_COND_CREATE are implicitly enabled if the event mask includes any of
  74  * the LT_DIAG_LTHREAD_XXX, LT_DIAG_MUTEX_XXX or LT_DIAG_COND_XXX events
  75  * respectively.
  76  *
  77  * These create events may also be included in the mask discreetly if it is
  78  * desired to monitor only create events.
  79  *
  80  * @param  time
  81  *  The time in cpu clks at which the event occurred
  82  *
  83  * @param  lthread
  84  *  The current lthread
  85  *
  86  * @param diag_event
  87  *  The diagnostic event id (bit position in the mask)
  88  *
  89  * @param  diag_ref
  90  *
  91  * For LT_DIAG_LTHREAD_CREATE, LT_DIAG_MUTEX_CREATE or LT_DIAG_COND_CREATE
  92  * this parameter is not used and set to 0.
  93  * All other events diag_ref contains the user ref value returned by the
  94  * callback function when lthread is created.
  95  *
  96  * The diag_ref values assigned to mutex and cond var can be retrieved
  97  * using the APIs lthread_mutex_diag_ref(), and lthread_cond_diag_ref()
  98  * respectively.
  99  *
 100  * @param p1
 101  *  see below
 102  *
 103  * @param p1
 104  *  see below
 105  *
 106  * @returns
 107  * For LT_DIAG_LTHREAD_CREATE, LT_DIAG_MUTEX_CREATE or LT_DIAG_COND_CREATE
 108  * expects a user diagnostic ref value that will be saved in the lthread, mutex
 109  * or cond var.
 110  *
 111  * For all other events return value is ignored.
 112  *
 113  *      LT_DIAG_SCHED_CREATE - Invoked when a scheduler is created
 114  *              p1 = the scheduler that was created
 115  *              p2 = not used
 116  *              return value will be ignored
 117  *
 118  *      LT_DIAG_SCHED_SHUTDOWN - Invoked when a shutdown request is received
 119  *              p1 = the scheduler to be shutdown
 120  *              p2 = not used
 121  *              return value will be ignored
 122  *
 123  *      LT_DIAG_LTHREAD_CREATE - Invoked when a thread is created
 124  *              p1 = the lthread that was created
 125  *              p2 = not used
 126  *              return value will be stored in the lthread
 127  *
 128  *      LT_DIAG_LTHREAD_EXIT - Invoked when a lthread exits
 129  *              p2 = 0 if the thread was already joined
 130  *              p2 = 1 if the thread was not already joined
 131  *              return val ignored
 132  *
 133  *      LT_DIAG_LTHREAD_JOIN - Invoked when a lthread exits
 134  *              p1 = the lthread that is being joined
 135  *              p2 = 0 if the thread was already exited
 136  *              p2 = 1 if the thread was not already exited
 137  *              return val ignored
 138  *
 139  *      LT_DIAG_LTHREAD_CANCELLED - Invoked when an lthread is cancelled
 140  *              p1 = not used
 141  *              p2 = not used
 142  *              return val ignored
 143  *
 144  *      LT_DIAG_LTHREAD_DETACH - Invoked when an lthread is detached
 145  *              p1 = not used
 146  *              p2 = not used
 147  *              return val ignored
 148  *
 149  *      LT_DIAG_LTHREAD_FREE - Invoked when an lthread is freed
 150  *              p1 = not used
 151  *              p2 = not used
 152  *              return val ignored
 153  *
 154  *      LT_DIAG_LTHREAD_SUSPENDED - Invoked when an lthread is suspended
 155  *              p1 = not used
 156  *              p2 = not used
 157  *              return val ignored
 158  *
 159  *      LT_DIAG_LTHREAD_YIELD - Invoked when an lthread explicitly yields
 160  *              p1 = not used
 161  *              p2 = not used
 162  *              return val ignored
 163  *
 164  *      LT_DIAG_LTHREAD_RESCHEDULED - Invoked when an lthread is rescheduled
 165  *              p1 = not used
 166  *              p2 = not used
 167  *              return val ignored
 168  *
 169  *      LT_DIAG_LTHREAD_RESUMED - Invoked when an lthread is resumed
 170  *              p1 = not used
 171  *              p2 = not used
 172  *              return val ignored
 173  *
 174  *      LT_DIAG_LTHREAD_AFFINITY - Invoked when an lthread is affinitised
 175  *              p1 = the destination lcore_id
 176  *              p2 = not used
 177  *              return val ignored
 178  *
 179  *      LT_DIAG_LTHREAD_TMR_START - Invoked when an lthread starts a timer
 180  *              p1 = address of timer node
 181  *              p2 = the timeout value
 182  *              return val ignored
 183  *
 184  *      LT_DIAG_LTHREAD_TMR_DELETE - Invoked when an lthread deletes a timer
 185  *              p1 = address of the timer node
 186  *              p2 = 0 the timer and the was successfully deleted
 187  *              p2 = not usee
 188  *              return val ignored
 189  *
 190  *      LT_DIAG_LTHREAD_TMR_EXPIRED - Invoked when an lthread timer expires
 191  *              p1 = address of scheduler the timer expired on
 192  *              p2 = the thread associated with the timer
 193  *              return val ignored
 194  *
 195  *      LT_DIAG_COND_CREATE - Invoked when a condition variable is created
 196  *              p1 = address of cond var that was created
 197  *              p2 = not used
 198  *              return diag ref value will be stored in the condition variable
 199  *
 200  *      LT_DIAG_COND_DESTROY - Invoked when a condition variable is destroyed
 201  *              p1 = not used
 202  *              p2 = not used
 203  *              return val ignored
 204  *
 205  *      LT_DIAG_COND_WAIT - Invoked when an lthread waits on a cond var
 206  *              p1 = the address of the condition variable
 207  *              p2 = not used
 208  *              return val ignored
 209  *
 210  *      LT_DIAG_COND_SIGNAL - Invoked when an lthread signals a cond var
 211  *              p1 = the address of the cond var
 212  *              p2 = the lthread that was signalled, or error code
 213  *              return val ignored
 214  *
 215  *      LT_DIAG_COND_BROADCAST - Invoked when an lthread broadcasts a cond var
 216  *              p1 = the address of the condition variable
 217  *              p2 = the lthread(s) that are signalled, or error code
 218  *
 219  *      LT_DIAG_MUTEX_CREATE - Invoked when a mutex is created
 220  *              p1 = address of muex
 221  *              p2 = not used
 222  *              return diag ref value will be stored in the mutex variable
 223  *
 224  *      LT_DIAG_MUTEX_DESTROY - Invoked when a mutex is destroyed
 225  *              p1 = address of mutex
 226  *              p2 = not used
 227  *              return val ignored
 228  *
 229  *      LT_DIAG_MUTEX_LOCK - Invoked when a mutex lock is obtained
 230  *              p1 = address of mutex
 231  *              p2 = function return value
 232  *              return val ignored
 233  *
 234  *      LT_DIAG_MUTEX_BLOCKED  - Invoked when an lthread blocks on a mutex
 235  *              p1 = address of mutex
 236  *              p2 = function return value
 237  *              return val ignored
 238  *
 239  *      LT_DIAG_MUTEX_TRYLOCK - Invoked when a mutex try lock is attempted
 240  *              p1 = address of mutex
 241  *              p2 = the function return value
 242  *              return val ignored
 243  *
 244  *      LT_DIAG_MUTEX_UNLOCKED - Invoked when a mutex is unlocked
 245  *              p1 = address of mutex
 246  *              p2 = the thread that was unlocked, or error code
 247  *              return val ignored
 248  */
 249 typedef uint64_t (*diag_callback) (uint64_t time, struct lthread *lt,
 250                                   int diag_event, uint64_t diag_ref,
 251                                 const char *text, uint64_t p1, uint64_t p2);
 252
 253 /*
 254  * Set user diagnostic callback and mask
 255  * If the callback function pointer is NULL the default
 256  * callback handler will be restored.
 257  */
 258 void lthread_diagnostic_enable(diag_callback cb, uint64_t diag_mask);
 259
 260 /*
 261  * Set diagnostic mask
 262  */
 263 void lthread_diagnostic_set_mask(uint64_t mask);
 264
 265 /*
 266  * lthread diagnostic callback
 267  */
 268 enum lthread_diag_ev {
 269         /* bits 0 - 14 lthread flag group */
 270         LT_DIAG_LTHREAD_CREATE,         /* 00 mask 0x00000001 */
 271         LT_DIAG_LTHREAD_EXIT,           /* 01 mask 0x00000002 */
 272         LT_DIAG_LTHREAD_JOIN,           /* 02 mask 0x00000004 */
 273         LT_DIAG_LTHREAD_CANCEL,         /* 03 mask 0x00000008 */
 274         LT_DIAG_LTHREAD_DETACH,         /* 04 mask 0x00000010 */
 275         LT_DIAG_LTHREAD_FREE,           /* 05 mask 0x00000020 */
 276         LT_DIAG_LTHREAD_SUSPENDED,      /* 06 mask 0x00000040 */
 277         LT_DIAG_LTHREAD_YIELD,          /* 07 mask 0x00000080 */
 278         LT_DIAG_LTHREAD_RESCHEDULED,    /* 08 mask 0x00000100 */
 279         LT_DIAG_LTHREAD_SLEEP,          /* 09 mask 0x00000200 */
 280         LT_DIAG_LTHREAD_RESUMED,        /* 10 mask 0x00000400 */
 281         LT_DIAG_LTHREAD_AFFINITY,       /* 11 mask 0x00000800 */
 282         LT_DIAG_LTHREAD_TMR_START,      /* 12 mask 0x00001000 */
 283         LT_DIAG_LTHREAD_TMR_DELETE,     /* 13 mask 0x00002000 */
 284         LT_DIAG_LTHREAD_TMR_EXPIRED,    /* 14 mask 0x00004000 */
 285         /* bits 15 - 19 conditional variable flag group */
 286         LT_DIAG_COND_CREATE,            /* 15 mask 0x00008000 */
 287         LT_DIAG_COND_DESTROY,           /* 16 mask 0x00010000 */
 288         LT_DIAG_COND_WAIT,              /* 17 mask 0x00020000 */
 289         LT_DIAG_COND_SIGNAL,            /* 18 mask 0x00040000 */
 290         LT_DIAG_COND_BROADCAST,         /* 19 mask 0x00080000 */
 291         /* bits 20 - 25 mutex flag group */
 292         LT_DIAG_MUTEX_CREATE,           /* 20 mask 0x00100000 */
 293         LT_DIAG_MUTEX_DESTROY,          /* 21 mask 0x00200000 */
 294         LT_DIAG_MUTEX_LOCK,             /* 22 mask 0x00400000 */
 295         LT_DIAG_MUTEX_TRYLOCK,          /* 23 mask 0x00800000 */
 296         LT_DIAG_MUTEX_BLOCKED,          /* 24 mask 0x01000000 */
 297         LT_DIAG_MUTEX_UNLOCKED,         /* 25 mask 0x02000000 */
 298         /* bits 26 - 27 scheduler flag group - 8 bits */
 299         LT_DIAG_SCHED_CREATE,           /* 26 mask 0x04000000 */
 300         LT_DIAG_SCHED_SHUTDOWN,         /* 27 mask 0x08000000 */
 301         LT_DIAG_EVENT_MAX
 302 };
 303
 304 #define LT_DIAG_ALL 0xffffffffffffffff
 305
 306
 307 /*
 308  * Display scheduler stats
 309  */
 310 void
 311 lthread_sched_stats_display(void);
 312
 313 /*
 314  * return the diagnostic ref val stored in a condition var
 315  */
 316 uint64_t
 317 lthread_cond_diag_ref(struct lthread_cond *c);
 318
 319 /*
 320  * return the diagnostic ref val stored in a mutex
 321  */
 322 uint64_t
 323 lthread_mutex_diag_ref(struct lthread_mutex *m);
 324
 325 #endif                          /* LTHREAD_DIAG_API_H_ */