296 lines
7.2 KiB
C
296 lines
7.2 KiB
C
/*-
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* Public Domain 2008-2012 WiredTiger, Inc.
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*
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* This is free and unencumbered software released into the public domain.
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*
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* Anyone is free to copy, modify, publish, use, compile, sell, or
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* distribute this software, either in source code form or as a compiled
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* binary, for any purpose, commercial or non-commercial, and by any
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* means.
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*
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* In jurisdictions that recognize copyright laws, the author or authors
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* of this software dedicate any and all copyright interest in the
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* software to the public domain. We make this dedication for the benefit
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* of the public at large and to the detriment of our heirs and
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* successors. We intend this dedication to be an overt act of
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* relinquishment in perpetuity of all present and future rights to this
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* software under copyright law.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "thread.h"
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static void print_stats(u_int);
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static void *reader(void *);
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static void *writer(void *);
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typedef struct {
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int remove; /* cursor.remove */
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int update; /* cursor.update */
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int reads; /* cursor.search */
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} STATS;
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static STATS *run_stats;
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/*
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* r --
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* Return a 32-bit pseudo-random number.
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*
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* This is an implementation of George Marsaglia's multiply-with-carry pseudo-
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* random number generator. Computationally fast, with reasonable randomness
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* properties.
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*/
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static inline uint32_t
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r(void)
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{
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static uint32_t m_w = 0, m_z = 0;
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if (m_w == 0) {
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struct timeval t;
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(void)gettimeofday(&t, NULL);
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m_w = (uint32_t)t.tv_sec;
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m_z = (uint32_t)t.tv_usec;
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}
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m_z = 36969 * (m_z & 65535) + (m_z >> 16);
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m_w = 18000 * (m_w & 65535) + (m_w >> 16);
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return (m_z << 16) + (m_w & 65535);
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}
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int
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rw_start(u_int readers, u_int writers)
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{
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struct timeval start, stop;
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double seconds;
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pthread_t *tids;
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u_int i;
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int ret;
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void *thread_ret;
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/* Create statistics and thread structures. */
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if ((run_stats = calloc(
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(size_t)(readers + writers), sizeof(*run_stats))) == NULL ||
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(tids = calloc((size_t)(readers + writers), sizeof(*tids))) == NULL)
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die("calloc", errno);
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(void)gettimeofday(&start, NULL);
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/* Create threads. */
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for (i = 0; i < readers; ++i)
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if ((ret = pthread_create(
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&tids[i], NULL, reader, (void *)(uintptr_t)i)) != 0)
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die("pthread_create", ret);
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for (; i < readers + writers; ++i) {
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if ((ret = pthread_create(
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&tids[i], NULL, writer, (void *)(uintptr_t)i)) != 0)
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die("pthread_create", ret);
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}
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/* Wait for the threads. */
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for (i = 0; i < readers + writers; ++i)
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(void)pthread_join(tids[i], &thread_ret);
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(void)gettimeofday(&stop, NULL);
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seconds = (stop.tv_sec - start.tv_sec) +
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(stop.tv_usec - start.tv_usec) * 1e-6;
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fprintf(stderr, "timer: %.2lf seconds (%d ops/second)\n",
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seconds, (int)(((readers + writers) * nops) / seconds));
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print_stats(readers + writers);
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free(run_stats);
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free(tids);
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return (0);
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}
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/*
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* reader_op --
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* Read operation.
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*/
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static inline void
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reader_op(WT_CURSOR *cursor)
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{
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WT_ITEM *key, _key;
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u_int keyno;
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int ret;
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char keybuf[64];
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key = &_key;
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keyno = r() % nkeys;
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if (ftype == ROW) {
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key->data = keybuf;
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key->size = (uint32_t)
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snprintf(keybuf, sizeof(keybuf), "%017u", keyno);
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cursor->set_key(cursor, key);
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} else
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cursor->set_key(cursor, (uint32_t)keyno);
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if ((ret = cursor->search(cursor)) != 0 && ret != WT_NOTFOUND)
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die("cursor.search", ret);
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}
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/*
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* reader --
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* Reader thread start function.
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*/
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static void *
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reader(void *arg)
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{
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STATS *s;
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WT_CURSOR *cursor;
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WT_SESSION *session;
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pthread_t tid;
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u_int i;
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int id, ret;
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id = (int)(uintptr_t)arg;
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tid = pthread_self();
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printf(" read thread %2d starting: tid: %p\n", id, (void *)tid);
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sched_yield(); /* Get all the threads created. */
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s = &run_stats[id];
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if (session_per_op) {
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for (i = 0; i < nops; ++i, ++s->reads, sched_yield()) {
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if ((ret = conn->open_session(
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conn, NULL, NULL, &session)) != 0)
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die("conn.open_session", ret);
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if ((ret = session->open_cursor(
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session, FNAME, NULL, NULL, &cursor)) != 0)
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die("session.open_cursor", ret);
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reader_op(cursor);
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if ((ret = session->close(session, NULL)) != 0)
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die("session.close", ret);
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}
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} else {
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if ((ret = conn->open_session(
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conn, NULL, NULL, &session)) != 0)
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die("conn.open_session", ret);
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if ((ret = session->open_cursor(
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session, FNAME, NULL, NULL, &cursor)) != 0)
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die("session.open_cursor", ret);
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for (i = 0; i < nops; ++i, ++s->reads, sched_yield())
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reader_op(cursor);
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if ((ret = session->close(session, NULL)) != 0)
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die("session.close", ret);
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}
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return (NULL);
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}
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/*
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* writer_op --
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* Write operation.
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*/
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static inline void
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writer_op(WT_CURSOR *cursor, STATS *s)
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{
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WT_ITEM *key, _key, *value, _value;
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u_int keyno;
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int ret;
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char keybuf[64], valuebuf[64];
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key = &_key;
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value = &_value;
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keyno = r() % nkeys;
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if (ftype == ROW) {
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key->data = keybuf;
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key->size = (uint32_t)
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snprintf(keybuf, sizeof(keybuf), "%017u", keyno);
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cursor->set_key(cursor, key);
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} else
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cursor->set_key(cursor, (uint32_t)keyno);
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if (keyno % 5 == 0) {
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++s->remove;
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if ((ret =
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cursor->remove(cursor)) != 0 && ret != WT_NOTFOUND)
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die("cursor.remove", ret);
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} else {
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++s->update;
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value->data = valuebuf;
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if (ftype == FIX)
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cursor->set_value(cursor, 0x10);
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else {
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value->size = (uint32_t)snprintf(
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valuebuf, sizeof(valuebuf), "XXX %37u", keyno);
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cursor->set_value(cursor, value);
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}
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if ((ret = cursor->update(cursor)) != 0)
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die("cursor.update", ret);
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}
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}
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/*
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* writer --
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* Writer thread start function.
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*/
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static void *
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writer(void *arg)
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{
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STATS *s;
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WT_CURSOR *cursor;
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WT_SESSION *session;
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pthread_t tid;
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u_int i;
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int id, ret;
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id = (int)(uintptr_t)arg;
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tid = pthread_self();
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printf("write thread %2d starting: tid: %p\n", id, (void *)tid);
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sched_yield(); /* Get all the threads created. */
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s = &run_stats[id];
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if (session_per_op) {
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for (i = 0; i < nops; ++i, sched_yield()) {
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if ((ret = conn->open_session(
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conn, NULL, NULL, &session)) != 0)
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die("conn.open_session", ret);
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if ((ret = session->open_cursor(
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session, FNAME, NULL, NULL, &cursor)) != 0)
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die("session.open_cursor", ret);
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writer_op(cursor, s);
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if ((ret = session->close(session, NULL)) != 0)
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die("session.close", ret);
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}
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} else {
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if ((ret = conn->open_session(
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conn, NULL, NULL, &session)) != 0)
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die("conn.open_session", ret);
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if ((ret = session->open_cursor(
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session, FNAME, NULL, NULL, &cursor)) != 0)
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die("session.open_cursor", ret);
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for (i = 0; i < nops; ++i, sched_yield())
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writer_op(cursor, s);
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if ((ret = session->close(session, NULL)) != 0)
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die("session.close", ret);
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}
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return (NULL);
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}
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/*
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* print_stats --
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* Display reader/writer thread stats.
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*/
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static void
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print_stats(u_int nthreads)
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{
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STATS *s;
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u_int id;
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s = run_stats;
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for (id = 0; id < nthreads; ++id, ++s)
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printf("%3d: read %6d, remove %6d, update %6d\n",
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id, s->reads, s->remove, s->update);
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}
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