darshan-posix.c 29.5 KB
Newer Older
1
/*
Shane Snyder's avatar
Shane Snyder committed
2 3 4
 * Copyright (C) 2015 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
5 6
 */

7
#include "darshan-runtime-config.h"
8 9 10 11 12 13 14 15 16 17 18 19 20 21
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/uio.h>
#include <sys/mman.h>
#include <search.h>
#include <assert.h>
22
#include <libgen.h>
23
#include <aio.h>
24
#define __USE_GNU
25
#include <pthread.h>
26

27
#include "uthash.h"
28
#include "darshan.h"
29
#include "darshan-posix-log-format.h"
30

31
#ifndef HAVE_OFF64_T
32 33
typedef int64_t off64_t;
#endif
34 35 36
#ifndef HAVE_AIOCB64
#define aiocb64 aiocb
#endif
37

38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
#ifdef DARSHAN_PRELOAD
#define __USE_GNU
#include <dlfcn.h>
#include <stdlib.h>

#define DARSHAN_FORWARD_DECL(name,ret,args) \
  ret (*__real_ ## name)args = NULL;

#define DARSHAN_DECL(__name) __name

#define DARSHAN_MPI_CALL(func) __real_ ## func

#define MAP_OR_FAIL(func) \
    if (!(__real_ ## func)) \
    { \
        __real_ ## func = dlsym(RTLD_NEXT, #func); \
        if(!(__real_ ## func)) { \
           fprintf(stderr, "Darshan failed to map symbol: %s\n", #func); \
           exit(1); \
       } \
    }

#else
61

62 63 64 65 66
#define DARSHAN_FORWARD_DECL(name,ret,args) \
  extern ret __real_ ## name args;

#define DARSHAN_DECL(__name) __wrap_ ## __name

67 68
#define DARSHAN_MPI_CALL(func) func

69 70
#define MAP_OR_FAIL(func)

71 72
#endif

73 74
/* TODO: more libc, fgetc, etc etc etc. */

75 76
DARSHAN_FORWARD_DECL(open, int, (const char *path, int flags, ...));
DARSHAN_FORWARD_DECL(open64, int, (const char *path, int flags, ...));
77 78 79 80 81 82 83 84 85 86
DARSHAN_FORWARD_DECL(creat, int, (const char* path, mode_t mode));
DARSHAN_FORWARD_DECL(creat64, int, (const char* path, mode_t mode));
DARSHAN_FORWARD_DECL(read, ssize_t, (int fd, void *buf, size_t count));
DARSHAN_FORWARD_DECL(write, ssize_t, (int fd, const void *buf, size_t count));
DARSHAN_FORWARD_DECL(pread, ssize_t, (int fd, void *buf, size_t count, off_t offset));
DARSHAN_FORWARD_DECL(pwrite, ssize_t, (int fd, const void *buf, size_t count, off_t offset));
DARSHAN_FORWARD_DECL(pread64, ssize_t, (int fd, void *buf, size_t count, off64_t offset));
DARSHAN_FORWARD_DECL(pwrite64, ssize_t, (int fd, const void *buf, size_t count, off64_t offset));
DARSHAN_FORWARD_DECL(readv, ssize_t, (int fd, const struct iovec *iov, int iovcnt));
DARSHAN_FORWARD_DECL(writev, ssize_t, (int fd, const struct iovec *iov, int iovcnt));
87 88
DARSHAN_FORWARD_DECL(close, int, (int fd));

89
struct posix_file_runtime
90
{
91
    struct darshan_posix_file* file_record;
92 93 94
    double last_meta_end;
    double last_read_end;
    double last_write_end;
95
    UT_hash_handle hlink;
96
};
97

98
struct posix_file_runtime_ref
99
{
100
    struct posix_file_runtime* file;
101 102 103 104 105 106
    int fd;
    UT_hash_handle hlink;
};

struct posix_runtime
{
107
    struct posix_file_runtime* file_runtime_array;
108
    struct darshan_posix_file* file_record_array;
109
    int file_array_size;
110
    int file_array_ndx;
111 112
    struct posix_file_runtime* file_hash;
    struct posix_file_runtime_ref* fd_hash;
113 114
    void *red_buf;
    int shared_rec_count;
115 116
};

117
static struct posix_runtime *posix_runtime = NULL;
118
static pthread_mutex_t posix_runtime_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
Shane Snyder's avatar
Shane Snyder committed
119
static int instrumentation_disabled = 0;
120
static int my_rank = -1;
121

122
/* TODO: I'm sure these should be applied on all modules */
123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
/* these are paths that we will not trace */
static char* exclusions[] = {
"/etc/",
"/dev/",
"/usr/",
"/bin/",
"/boot/",
"/lib/",
"/opt/",
"/sbin/",
"/sys/",
"/proc/",
NULL
};

138
static void posix_runtime_initialize(void);
139 140 141
static struct posix_file_runtime* posix_file_by_name(const char *name);
static struct posix_file_runtime* posix_file_by_name_setfd(const char* name, int fd);
static struct posix_file_runtime* posix_file_by_fd(int fd);
142 143
static void posix_file_close_fd(int fd);

Shane Snyder's avatar
Shane Snyder committed
144
static void posix_disable_instrumentation(void);
145 146
static void posix_prepare_for_reduction(darshan_record_id *shared_recs,
    int *shared_rec_count, void **send_buf, void **recv_buf, int *rec_size);
147
static void posix_record_reduction_op(void* infile_v, void* inoutfile_v,
148 149
    int *len, MPI_Datatype *datatype);
static void posix_get_output_data(void **buffer, int *size);
150
static void posix_shutdown(void);
151

152 153
#define POSIX_LOCK() pthread_mutex_lock(&posix_runtime_mutex)
#define POSIX_UNLOCK() pthread_mutex_unlock(&posix_runtime_mutex)
154

155
#define POSIX_SET(__file, __counter, __value) do {\
156
    (__file)->file_record->counters[__counter] = __value; \
157 158 159
} while(0)

#define POSIX_F_SET(__file, __counter, __value) do {\
160
    (__file)->file_record->fcounters[__counter] = __value; \
161 162 163
} while(0)

#define POSIX_INC(__file, __counter, __value) do {\
164
    (__file)->file_record->counters[__counter] += __value; \
165 166 167
} while(0)

#define POSIX_F_INC(__file, __counter, __value) do {\
168
    (__file)->file_record->fcounters[__counter] += __value; \
169 170 171 172 173 174 175 176 177 178 179 180
} while(0)

#define POSIX_F_INC_NO_OVERLAP(__file, __tm1, __tm2, __last, __counter) do { \
    if(__tm1 > __last) \
        POSIX_F_INC(__file, __counter, (__tm2-__tm1)); \
    else \
        POSIX_F_INC(__file, __counter, (__tm2 - __last)); \
    if(__tm2 > __last) \
        __last = __tm2; \
} while(0)

#define POSIX_VALUE(__file, __counter) \
181
    ((__file)->file_record->counters[__counter])
182 183

#define POSIX_F_VALUE(__file, __counter) \
184
    ((__file)->file_record->fcounters[__counter])
185 186

#define POSIX_MAX(__file, __counter, __value) do {\
187
    if((__file)->file_record->counters[__counter] < __value) \
188
    { \
189
        (__file)->file_record->counters[__counter] = __value; \
190 191 192
    } \
} while(0)

193
#define POSIX_RECORD_OPEN(__ret, __path, __mode, __stream_flag, __tm1, __tm2) do { \
194
    struct posix_file_runtime* file; \
195 196 197 198 199 200 201 202 203
    char* exclude; \
    int tmp_index = 0; \
    if(__ret < 0) break; \
    while((exclude = exclusions[tmp_index])) { \
        if(!(strncmp(exclude, __path, strlen(exclude)))) \
            break; \
        tmp_index++; \
    } \
    if(exclude) break; \
204
    file = posix_file_by_name_setfd(__path, __ret); \
205
    if(!file) break; \
206
    /* CP_STAT_FILE(file, __path, __ret); */ \
207
    file->file_record->rank = my_rank; \
208
    if(__mode) \
209 210 211 212
        POSIX_SET(file, POSIX_MODE, __mode); \
    /* file->offset = 0; */ \
    /* file->last_byte_written = 0; */ \
    /* file->last_byte_read = 0; */ \
213
    if(__stream_flag)\
214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292
        POSIX_INC(file, POSIX_FOPENS, 1); \
    else \
        POSIX_INC(file, POSIX_OPENS, 1); \
    if(POSIX_F_VALUE(file, POSIX_F_OPEN_TIMESTAMP) == 0) \
        POSIX_F_SET(file, POSIX_F_OPEN_TIMESTAMP, __tm1); \
    POSIX_F_INC_NO_OVERLAP(file, __tm1, __tm2, file->last_meta_end, POSIX_F_META_TIME); \
} while(0)

#define POSIX_RECORD_READ(__ret, __fd, __pread_flag, __pread_offset, __aligned, __stream_flag, __tm1, __tm2) do{ \
    /* size_t stride; \
    int64_t this_offset; */ \
    struct posix_file_runtime* file; \
    /* int64_t file_alignment; */ \
    double __elapsed = __tm2-__tm1; \
    if(__ret < 0) break; \
    file = posix_file_by_fd(__fd); \
    if(!file) break; \
    /* if(__pread_flag) \
        this_offset = __pread_offset; \
    else \
        this_offset = file->offset; \
    file_alignment = CP_VALUE(file, CP_FILE_ALIGNMENT); \
    if(this_offset > file->last_byte_read) \
        CP_INC(file, CP_SEQ_READS, 1); \
    if(this_offset == (file->last_byte_read + 1)) \
        CP_INC(file, CP_CONSEC_READS, 1); \
    if(this_offset > 0 && this_offset > file->last_byte_read \
        && file->last_byte_read != 0) \
        stride = this_offset - file->last_byte_read - 1; \
    else \
        stride = 0; \
    file->last_byte_read = this_offset + __ret - 1; \
    file->offset = this_offset + __ret; \
    CP_MAX(file, CP_MAX_BYTE_READ, (this_offset + __ret -1)); \
    CP_INC(file, CP_BYTES_READ, __ret); */\
    if(__stream_flag)\
        POSIX_INC(file, POSIX_FREADS, 1); \
    else\
        POSIX_INC(file, POSIX_READS, 1); \
    /* CP_BUCKET_INC(file, CP_SIZE_READ_0_100, __ret); \
    cp_access_counter(file, stride, CP_COUNTER_STRIDE); \
    if(!__aligned) \
        CP_INC(file, CP_MEM_NOT_ALIGNED, 1); \
    if(file_alignment > 0 && (this_offset % file_alignment) != 0) \
        CP_INC(file, CP_FILE_NOT_ALIGNED, 1); \
    cp_access_counter(file, __ret, CP_COUNTER_ACCESS); \
    if(file->last_io_type == CP_WRITE) \
        CP_INC(file, CP_RW_SWITCHES, 1); \
    file->last_io_type = CP_READ; */ \
    POSIX_F_INC_NO_OVERLAP(file, __tm1, __tm2, file->last_read_end, POSIX_F_READ_TIME);  \
    if(POSIX_F_VALUE(file, POSIX_F_READ_START_TIMESTAMP) == 0) \
        POSIX_F_SET(file, POSIX_F_READ_START_TIMESTAMP, __tm1); \
    POSIX_F_SET(file, POSIX_F_READ_END_TIMESTAMP, __tm2); \
    if(POSIX_F_VALUE(file, POSIX_F_MAX_READ_TIME) < __elapsed){ \
        POSIX_F_SET(file, POSIX_F_MAX_READ_TIME, __elapsed); \
        POSIX_SET(file, POSIX_MAX_READ_TIME_SIZE, __ret); } \
} while(0)

#define POSIX_RECORD_WRITE(__ret, __fd, __pwrite_flag, __pwrite_offset, __aligned, __stream_flag, __tm1, __tm2) do{ \
    /* size_t stride; \
    int64_t this_offset; */ \
    struct posix_file_runtime* file; \
    /* int64_t file_alignment; */ \
    double __elapsed = __tm2-__tm1; \
    if(__ret < 0) break; \
    file = posix_file_by_fd(__fd); \
    if(!file) break; \
    /* if(__pwrite_flag) \
        this_offset = __pwrite_offset; \
    else \
        this_offset = file->offset; \
    file_alignment = CP_VALUE(file, CP_FILE_ALIGNMENT); \
    if(this_offset > file->last_byte_written) \
        CP_INC(file, CP_SEQ_WRITES, 1); \
    if(this_offset == (file->last_byte_written + 1)) \
        CP_INC(file, CP_CONSEC_WRITES, 1); \
    if(this_offset > 0 && this_offset > file->last_byte_written \
        && file->last_byte_written != 0) \
        stride = this_offset - file->last_byte_written - 1; \
293
    else \
294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319
        stride = 0; \
    file->last_byte_written = this_offset + __ret - 1; \
    file->offset = this_offset + __ret; \
    CP_MAX(file, CP_MAX_BYTE_WRITTEN, (this_offset + __ret -1)); \
    CP_INC(file, CP_BYTES_WRITTEN, __ret); */ \
    if(__stream_flag) \
        POSIX_INC(file, POSIX_FWRITES, 1); \
    else \
        POSIX_INC(file, POSIX_WRITES, 1); \
    /* CP_BUCKET_INC(file, CP_SIZE_WRITE_0_100, __ret); \
    cp_access_counter(file, stride, CP_COUNTER_STRIDE); \
    if(!__aligned) \
        CP_INC(file, CP_MEM_NOT_ALIGNED, 1); \
    if(file_alignment > 0 && (this_offset % file_alignment) != 0) \
        CP_INC(file, CP_FILE_NOT_ALIGNED, 1); \
    cp_access_counter(file, __ret, CP_COUNTER_ACCESS); \
    if(file->last_io_type == CP_READ) \
        CP_INC(file, CP_RW_SWITCHES, 1); \
    file->last_io_type = CP_WRITE; */ \
    POSIX_F_INC_NO_OVERLAP(file, __tm1, __tm2, file->last_write_end, POSIX_F_WRITE_TIME); \
    if(POSIX_F_VALUE(file, POSIX_F_WRITE_START_TIMESTAMP) == 0) \
        POSIX_F_SET(file, POSIX_F_WRITE_START_TIMESTAMP, __tm1); \
    POSIX_F_SET(file, POSIX_F_WRITE_END_TIMESTAMP, __tm2); \
    if(POSIX_F_VALUE(file, POSIX_F_MAX_WRITE_TIME) < __elapsed){ \
        POSIX_F_SET(file, POSIX_F_MAX_WRITE_TIME, __elapsed); \
        POSIX_SET(file, POSIX_MAX_WRITE_TIME_SIZE, __ret); } \
320
} while(0)
321

322
int DARSHAN_DECL(open)(const char *path, int flags, ...)
323 324 325 326 327
{
    int mode = 0;
    int ret;
    double tm1, tm2;

328 329
    MAP_OR_FAIL(open);

330
    if(flags & O_CREAT) 
331 332 333 334 335 336
    {
        va_list arg;
        va_start(arg, flags);
        mode = va_arg(arg, int);
        va_end(arg);

337
        tm1 = darshan_core_wtime();
338
        ret = __real_open(path, flags, mode);
339
        tm2 = darshan_core_wtime();
340 341 342
    }
    else
    {
343
        tm1 = darshan_core_wtime();
344
        ret = __real_open(path, flags);
345
        tm2 = darshan_core_wtime();
346 347
    }

348 349
    POSIX_LOCK();
    posix_runtime_initialize();
350
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
351
    POSIX_UNLOCK();
352 353 354 355

    return(ret);
}

Shane Snyder's avatar
Shane Snyder committed
356 357 358 359 360 361
int DARSHAN_DECL(open64)(const char *path, int flags, ...)
{
    int mode = 0;
    int ret;
    double tm1, tm2;

362
    MAP_OR_FAIL(open64);
Shane Snyder's avatar
Shane Snyder committed
363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383

    if(flags & O_CREAT)
    {
        va_list arg;
        va_start(arg, flags);
        mode = va_arg(arg, int);
        va_end(arg);

        tm1 = darshan_core_wtime();
        ret = __real_open64(path, flags, mode);
        tm2 = darshan_core_wtime();
    }
    else
    {
        tm1 = darshan_core_wtime();
        ret = __real_open64(path, flags);
        tm2 = darshan_core_wtime();
    }

    POSIX_LOCK();
    posix_runtime_initialize();
384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

int DARSHAN_DECL(creat)(const char* path, mode_t mode)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(creat);

    tm1 = darshan_core_wtime();
    ret = __real_creat(path, mode);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

int DARSHAN_DECL(creat64)(const char* path, mode_t mode)
{
    int ret;
    double tm1, tm2;

    MAP_OR_FAIL(creat64);
Shane Snyder's avatar
Shane Snyder committed
415

416 417 418 419 420 421
    tm1 = darshan_core_wtime();
    ret = __real_creat64(path, mode);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
Shane Snyder's avatar
Shane Snyder committed
422 423 424 425 426 427
    POSIX_RECORD_OPEN(ret, path, mode, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613
ssize_t DARSHAN_DECL(read)(int fd, void *buf, size_t count)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(write);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_read(fd, buf, count);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_READ(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(write)(int fd, const void *buf, size_t count)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(write);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_write(fd, buf, count);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_WRITE(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pread)(int fd, void *buf, size_t count, off_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pread);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pread(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_READ(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pwrite)(int fd, const void *buf, size_t count, off_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pwrite);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pwrite(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_WRITE(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pread64)(int fd, void *buf, size_t count, off64_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pread64);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pread64(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_READ(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(pwrite64)(int fd, const void *buf, size_t count, off64_t offset)
{
    ssize_t ret;
    int aligned_flag = 0;
    double tm1, tm2;

    MAP_OR_FAIL(pwrite64);

    /* if((unsigned long)buf % darshan_mem_alignment == 0) aligned_flag = 1; */

    tm1 = darshan_core_wtime();
    ret = __real_pwrite64(fd, buf, count, offset);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
    POSIX_RECORD_WRITE(ret, fd, 1, offset, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(readv)(int fd, const struct iovec *iov, int iovcnt)
{
    ssize_t ret;
    int aligned_flag = 0;
    /* int aligned_flag = 1; */
    int i;
    double tm1, tm2;

    MAP_OR_FAIL(readv);
/*
    for(i=0; i<iovcnt; i++)
    {
        if(((unsigned long)iov[i].iov_base % darshan_mem_alignment) != 0)
            aligned_flag = 0;
    }*/

    tm1 = darshan_core_wtime();
    ret = __real_readv(fd, iov, iovcnt);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    POSIX_RECORD_READ(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

ssize_t DARSHAN_DECL(writev)(int fd, const struct iovec *iov, int iovcnt)
{
    ssize_t ret;
    int aligned_flag = 0;
    /* int aligned_flag = 1; */
    int i;
    double tm1, tm2;

    MAP_OR_FAIL(writev);
/*
    for(i=0; i<iovcnt; i++)
    {
        if(((unsigned long)iov[i].iov_base % darshan_mem_alignment) != 0)
            aligned_flag = 0;
    }*/

    tm1 = darshan_core_wtime();
    ret = __real_writev(fd, iov, iovcnt);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    POSIX_RECORD_WRITE(ret, fd, 0, 0, aligned_flag, 0, tm1, tm2);
    POSIX_UNLOCK();

    return(ret);
}

614 615
int DARSHAN_DECL(close)(int fd)
{
616
    struct posix_file_runtime* file;
617 618 619 620 621 622 623 624 625 626 627
    double tm1, tm2;
    int ret;

    MAP_OR_FAIL(close);

    tm1 = darshan_core_wtime();
    ret = __real_close(fd);
    tm2 = darshan_core_wtime();

    POSIX_LOCK();
    posix_runtime_initialize();
Shane Snyder's avatar
Shane Snyder committed
628 629 630
    file = posix_file_by_fd(fd);
    if(file)
    {
631 632 633 634
        /* file->last_byte_written = 0; */
        /* file->last_byte_read = 0; */
        POSIX_F_SET(file, POSIX_F_CLOSE_TIMESTAMP, darshan_core_wtime());
        POSIX_F_INC_NO_OVERLAP(file, tm1, tm2, file->last_meta_end, POSIX_F_META_TIME);
Shane Snyder's avatar
Shane Snyder committed
635 636
        posix_file_close_fd(fd);
    }
637 638 639 640 641 642
    POSIX_UNLOCK();    

    return(ret);
}

/* ***************************************************** */
643

644
static void posix_runtime_initialize()
645
{
646 647 648
    int mem_limit;
    struct darshan_module_funcs posix_mod_fns =
    {
Shane Snyder's avatar
Shane Snyder committed
649
        .disable_instrumentation = &posix_disable_instrumentation,
650
        .prepare_for_reduction = &posix_prepare_for_reduction,
651
        .record_reduction_op = &posix_record_reduction_op,
652
        .get_output_data = &posix_get_output_data,
653
        .shutdown = &posix_shutdown
654
    };
655

Shane Snyder's avatar
Shane Snyder committed
656 657
    /* don't do anything if already initialized or instrumenation is disabled */
    if(posix_runtime || instrumentation_disabled)
658
        return;
659

660 661
    /* register the posix module with darshan core */
    darshan_core_register_module(
662
        DARSHAN_POSIX_MOD,
663 664 665 666 667 668 669 670 671 672 673 674 675 676
        &posix_mod_fns,
        &mem_limit);

    /* return if no memory assigned by darshan core */
    if(mem_limit == 0)
        return;

    posix_runtime = malloc(sizeof(*posix_runtime));
    if(!posix_runtime)
        return;
    memset(posix_runtime, 0, sizeof(*posix_runtime));

    /* set maximum number of file records according to max memory limit */
    /* NOTE: maximum number of records is based on the size of a posix file record */
677
    /* TODO: should we base memory usage off file record or total runtime structure sizes? */
678
    posix_runtime->file_array_size = mem_limit / sizeof(struct darshan_posix_file);
679
    posix_runtime->file_array_ndx = 0;
680 681

    /* allocate array of runtime file records */
682
    posix_runtime->file_runtime_array = malloc(posix_runtime->file_array_size *
683
                                               sizeof(struct posix_file_runtime));
684 685 686
    posix_runtime->file_record_array = malloc(posix_runtime->file_array_size *
                                              sizeof(struct darshan_posix_file));
    if(!posix_runtime->file_runtime_array || !posix_runtime->file_record_array)
687 688 689 690
    {
        posix_runtime->file_array_size = 0;
        return;
    }
691
    memset(posix_runtime->file_runtime_array, 0, posix_runtime->file_array_size *
692
           sizeof(struct posix_file_runtime));
693 694
    memset(posix_runtime->file_record_array, 0, posix_runtime->file_array_size *
           sizeof(struct darshan_posix_file));
695

Shane Snyder's avatar
Shane Snyder committed
696 697
    /* TODO: can we move this out of here? perhaps register_module returns rank? */
    DARSHAN_MPI_CALL(PMPI_Comm_rank)(MPI_COMM_WORLD, &my_rank);
698

699 700
    return;
}
701

702
static struct posix_file_runtime* posix_file_by_name(const char *name)
703
{
704
    struct posix_file_runtime *file = NULL;
705
    char *newname = NULL;
706
    darshan_record_id file_id;
707

Shane Snyder's avatar
Shane Snyder committed
708
    if(!posix_runtime || instrumentation_disabled)
709
        return(NULL);
710

711
    newname = darshan_clean_file_path(name);
712
    if(!newname)
713
        newname = (char*)name;
714

715
    /* get a unique id for this file from darshan core */
Shane Snyder's avatar
Shane Snyder committed
716
    darshan_core_register_record(
717 718 719
        (void*)newname,
        strlen(newname),
        1,
720
        DARSHAN_POSIX_MOD,
721
        &file_id);
722

723
    /* search the hash table for this file record, and return if found */
724
    HASH_FIND(hlink, posix_runtime->file_hash, &file_id, sizeof(darshan_record_id), file);
725
    if(file)
726
    {
727
        if(newname != name)
728
            free(newname);
729
        return(file);
730 731
    }

732 733 734 735 736 737
    if(posix_runtime->file_array_ndx < posix_runtime->file_array_size);
    {
        /* no existing record, assign a new file record from the global array */
        file = &(posix_runtime->file_runtime_array[posix_runtime->file_array_ndx]);
        file->file_record = &(posix_runtime->file_record_array[posix_runtime->file_array_ndx]);
        file->file_record->f_id = file_id;
738

739
        /* add new record to file hash table */
740
        HASH_ADD(hlink, posix_runtime->file_hash, file_record->f_id, sizeof(darshan_record_id), file);
741

742 743
        posix_runtime->file_array_ndx++;
    }
744 745

    if(newname != name)
746
        free(newname);
747 748 749
    return(file);
}

750
static struct posix_file_runtime* posix_file_by_name_setfd(const char* name, int fd)
751
{
752 753
    struct posix_file_runtime* file;
    struct posix_file_runtime_ref* ref;
754

Shane Snyder's avatar
Shane Snyder committed
755
    if(!posix_runtime || instrumentation_disabled)
756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781
        return(NULL);

    /* find file record by name first */
    file = posix_file_by_name(name);

    if(!file)
        return(NULL);

    /* search hash table for existing file ref for this fd */
    HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
    if(ref)
    {
        /* we have a reference.  Make sure it points to the correct file
         * and return it
         */
        ref->file = file;
        return(file);
    }

    /* if we hit this point, then we don't have a reference for this fd
     * in the table yet.  Add it.
     */
    ref = malloc(sizeof(*ref));
    if(!ref)
        return(NULL);
    memset(ref, 0, sizeof(*ref));
Shane Snyder's avatar
Shane Snyder committed
782

783 784 785 786 787 788 789
    ref->file = file;
    ref->fd = fd;    
    HASH_ADD(hlink, posix_runtime->fd_hash, fd, sizeof(int), ref);

    return(file);
}

790
static struct posix_file_runtime* posix_file_by_fd(int fd)
Shane Snyder's avatar
Shane Snyder committed
791
{
792
    struct posix_file_runtime_ref* ref;
Shane Snyder's avatar
Shane Snyder committed
793 794 795 796 797 798 799 800 801 802 803 804

    if(!posix_runtime || instrumentation_disabled)
        return(NULL);

    /* search hash table for existing file ref for this fd */
    HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
    if(ref)
        return(ref->file);

    return(NULL);
}

805 806
static void posix_file_close_fd(int fd)
{
807
    struct posix_file_runtime_ref* ref;
808

Shane Snyder's avatar
Shane Snyder committed
809
    if(!posix_runtime || instrumentation_disabled)
810 811 812 813
        return;

    /* search hash table for this fd */
    HASH_FIND(hlink, posix_runtime->fd_hash, &fd, sizeof(int), ref);
814
    if(ref)
815 816 817 818 819 820 821
    {
        /* we have a reference, delete it */
        HASH_DELETE(hlink, posix_runtime->fd_hash, ref);
        free(ref);
    }

    return;
822 823
}

824 825 826 827 828 829 830 831 832 833 834 835 836
static int posix_file_compare(const void* a, const void* b)
{
    const struct darshan_posix_file* f_a = a;
    const struct darshan_posix_file* f_b = b;

    if(f_a->rank < f_b->rank)
        return 1;
    if(f_a->rank > f_b->rank)
        return -1;

    return 0;
}

837 838
/* ***************************************************** */

Shane Snyder's avatar
Shane Snyder committed
839
static void posix_disable_instrumentation()
840
{
841 842
    assert(posix_runtime);

Shane Snyder's avatar
Shane Snyder committed
843 844 845
    POSIX_LOCK();
    instrumentation_disabled = 1;
    POSIX_UNLOCK();
846

Shane Snyder's avatar
Shane Snyder committed
847 848 849
    return;
}

850 851 852 853 854 855 856
static void posix_prepare_for_reduction(
    darshan_record_id *shared_recs,
    int *shared_rec_count,
    void **send_buf,
    void **recv_buf,
    int *rec_size)
{
857
    struct posix_file_runtime *file;
858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893
    int i;

    assert(posix_runtime);

    /* necessary initialization of shared records (e.g., change rank to -1) */
    for(i = 0; i < *shared_rec_count; i++)
    {
        HASH_FIND(hlink, posix_runtime->file_hash, &shared_recs[i],
            sizeof(darshan_record_id), file);
        assert(file);

        /* TODO: any initialization before reduction */
        file->file_record->rank = -1;
    }

    /* sort the array of files descending by rank so that we get all of the 
     * shared files (marked by rank -1) in a contiguous portion at end 
     * of the array
     */
    qsort(posix_runtime->file_record_array, posix_runtime->file_array_ndx,
        sizeof(struct darshan_posix_file), posix_file_compare);

    /* make *send_buf point to the shared files at the end of sorted array */
    *send_buf =
        &(posix_runtime->file_record_array[posix_runtime->file_array_ndx-(*shared_rec_count)]);

    /* allocate memory for the reduction output on rank 0 */
    if(my_rank == 0)
    {
        *recv_buf = malloc(*shared_rec_count * sizeof(struct darshan_posix_file));
        if(!(*recv_buf))
            return;
    }

    *rec_size = sizeof(struct darshan_posix_file);

Shane Snyder's avatar
Shane Snyder committed
894
    /* TODO: cleaner way to do this? */
895 896 897 898 899 900 901
    if(my_rank == 0)
        posix_runtime->red_buf = *recv_buf;
    posix_runtime->shared_rec_count = *shared_rec_count;

    return;
}

902
static void posix_record_reduction_op(
903 904 905 906
    void* infile_v,
    void* inoutfile_v,
    int *len,
    MPI_Datatype *datatype)
Shane Snyder's avatar
Shane Snyder committed
907
{
908 909 910 911
    struct darshan_posix_file tmp_file;
    struct darshan_posix_file *infile = infile_v;
    struct darshan_posix_file *inoutfile = inoutfile_v;
    int i;
912
    int j;
913 914 915

    assert(posix_runtime);

916
    for(i=0; i<*len; i++)
917 918 919 920 921 922
    {
        memset(&tmp_file, 0, sizeof(struct darshan_posix_file));

        tmp_file.f_id = infile->f_id;
        tmp_file.rank = -1;

923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
        /* sum */
        for(j=POSIX_OPENS; j<=POSIX_FWRITES; j++)
        {
            tmp_file.counters[j] = infile->counters[j] + inoutfile->counters[j];
        }

        tmp_file.counters[POSIX_MODE] = infile->counters[POSIX_MODE];

        /* min non-zero (if available) value */
        for(j=POSIX_F_OPEN_TIMESTAMP; j<=POSIX_F_WRITE_START_TIMESTAMP; j++)
        {
            if(infile->fcounters[j] > inoutfile->fcounters[j] && inoutfile->fcounters[j] > 0)
                tmp_file.fcounters[j] = inoutfile->fcounters[j];
            else
                tmp_file.fcounters[j] = infile->fcounters[j];
        }

        /* max */
        for(j=POSIX_F_READ_END_TIMESTAMP; j<=POSIX_F_CLOSE_TIMESTAMP; j++)
        {
            if(infile->fcounters[j] > inoutfile->fcounters[j])
                tmp_file.fcounters[j] = infile->fcounters[j];
            else
                tmp_file.fcounters[j] = inoutfile->fcounters[j];
        }

        /* sum */
        for(j=POSIX_F_READ_TIME; j<=POSIX_F_META_TIME; j++)
        {
            tmp_file.fcounters[j] = infile->fcounters[j] + inoutfile->fcounters[j];
        }

        /* max (special case) */
        if(infile->fcounters[POSIX_F_MAX_READ_TIME] >
            inoutfile->fcounters[POSIX_F_MAX_READ_TIME])
        {
            tmp_file.fcounters[POSIX_F_MAX_READ_TIME] =
                infile->fcounters[POSIX_F_MAX_READ_TIME];
            tmp_file.counters[POSIX_MAX_READ_TIME_SIZE] =
                infile->counters[POSIX_MAX_READ_TIME_SIZE];
        }
964
        else
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
        {
            tmp_file.fcounters[POSIX_F_MAX_READ_TIME] =
                inoutfile->fcounters[POSIX_F_MAX_READ_TIME];
            tmp_file.counters[POSIX_MAX_READ_TIME_SIZE] =
                inoutfile->counters[POSIX_MAX_READ_TIME_SIZE];
        }

        if(infile->fcounters[POSIX_F_MAX_WRITE_TIME] >
            inoutfile->fcounters[POSIX_F_MAX_WRITE_TIME])
        {
            tmp_file.fcounters[POSIX_F_MAX_WRITE_TIME] =
                infile->fcounters[POSIX_F_MAX_WRITE_TIME];
            tmp_file.counters[POSIX_MAX_WRITE_TIME_SIZE] =
                infile->counters[POSIX_MAX_WRITE_TIME_SIZE];
        }
980
        else
981 982 983 984 985 986
        {
            tmp_file.fcounters[POSIX_F_MAX_WRITE_TIME] =
                inoutfile->fcounters[POSIX_F_MAX_WRITE_TIME];
            tmp_file.counters[POSIX_MAX_WRITE_TIME_SIZE] =
                inoutfile->counters[POSIX_MAX_WRITE_TIME_SIZE];
        }
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002

        /* update pointers */
        *inoutfile = tmp_file;
        inoutfile++;
        infile++;
    }

    return;
}

static void posix_get_output_data(
    void **buffer,
    int *size)
{
    assert(posix_runtime);

Shane Snyder's avatar
Shane Snyder committed
1003
    /* TODO: cleaner way to do this? */
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015
    /* clean up reduction state */
    if(my_rank == 0)
    {
        int tmp_ndx = posix_runtime->file_array_ndx - posix_runtime->shared_rec_count;
        memcpy(&(posix_runtime->file_record_array[tmp_ndx]), posix_runtime->red_buf,
            posix_runtime->shared_rec_count * sizeof(struct darshan_posix_file));
        free(posix_runtime->red_buf);
    }
    else
    {
        posix_runtime->file_array_ndx -= posix_runtime->shared_rec_count;
    }
1016 1017 1018

    *buffer = (void *)(posix_runtime->file_record_array);
    *size = posix_runtime->file_array_ndx * sizeof(struct darshan_posix_file);
1019

1020
    return;
1021 1022
}

1023
static void posix_shutdown()
1024
{
1025
    struct posix_file_runtime_ref *ref, *tmp;
1026 1027 1028 1029 1030 1031

    HASH_ITER(hlink, posix_runtime->fd_hash, ref, tmp)
    {
        HASH_DELETE(hlink, posix_runtime->fd_hash, ref);
        free(ref);
    }
1032

1033
    HASH_CLEAR(hlink, posix_runtime->file_hash); /* these entries are freed all at once below */
1034 1035 1036 1037 1038

    free(posix_runtime->file_runtime_array);
    free(posix_runtime->file_record_array);
    free(posix_runtime);
    posix_runtime = NULL;
1039 1040

    return;
1041 1042
}

1043 1044 1045 1046 1047 1048 1049 1050
/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ts=8 sts=4 sw=4 expandtab
 */