tsan/ts_stats.h

/* Copyright (c) 2008-2010, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// This file is part of ThreadSanitizer, a dynamic data race detector.
// Author: Konstantin Serebryany.
// Author: Timur Iskhodzhanov.
#ifndef TS_STATS_
#define TS_STATS_

#include "dynamic_annotations.h"
#include "ts_util.h"

// Statistic counters for each thread.
// For stats accessed concurrently from different threads
// we don't want to use global stats to avoid cache line ping-pong.
struct ThreadLocalStats {
  ThreadLocalStats() { Clear(); }
  void Clear() {
    memset(this, 0, sizeof(*this));
  }
  uintptr_t memory_access_sizes[18];
  uintptr_t events[LAST_EVENT];
  uintptr_t unlocked_access_ok;
  uintptr_t n_fast_access1, n_fast_access2, n_fast_access4, n_fast_access8,
            n_slow_access1, n_slow_access2, n_slow_access4, n_slow_access8,
            n_very_slow_access, n_access_slow_iter;

  uintptr_t mops_per_trace[16];
  uintptr_t locks_per_trace[16];
  uintptr_t locked_access[8];
  uintptr_t history_uses_same_segment, history_creates_new_segment,
            history_reuses_segment, history_uses_preallocated_segment;

  uintptr_t msm_branch_count[16];

  uintptr_t access_to_first_1g;
  uintptr_t access_to_first_2g;
  uintptr_t access_to_first_4g;
};

// Statistic counters for the entire tool, including aggregated
// ThreadLocalStats (which are made private so that one can not
// increment them using the global stats object).
struct Stats : private ThreadLocalStats {
  Stats() {
    memset(this, 0, sizeof(*this));
    ANNOTATE_BENIGN_RACE(&vts_clone, "Race on vts_clone");
    ANNOTATE_BENIGN_RACE(&ignore_below_cache_miss,
                         "Race on ignore_below_cache_miss");
    ANNOTATE_BENIGN_RACE_SIZED(msm_branch_count, sizeof(msm_branch_count),
                               "Race on msm_branch_count[]");
  }

  void Add(const ThreadLocalStats &s) {
    uintptr_t *p1 = (uintptr_t*)this;
    uintptr_t *p2 = (uintptr_t*)&s;
    size_t n = sizeof(s) / sizeof(uintptr_t);
    for (size_t i = 0; i < n; i++) {
      p1[i] += p2[i];
    }
  }

  void PrintStats() {
    PrintEventStats();
    Printf("   VTS: created small/big: %'ld / %'ld; "
           "deleted small/big: %'ld / %'ld; cloned: %'ld\n",
           vts_create_small, vts_create_big,
           vts_delete_small, vts_delete_big, vts_clone);
    Printf("   vts_total_create  = %'ld; avg=%'ld; delete = %'ld\n",
           vts_total_create,
           vts_total_create / (vts_create_small + vts_create_big + 1),
           vts_total_delete);
    Printf("   n_seg_hb        = %'ld\n", n_seg_hb);
    Printf("   n_vts_hb        = %'ld\n", n_vts_hb);
    Printf("   n_vts_hb_cached = %'ld\n", n_vts_hb_cached);
    Printf("   memory access:\n"
           "     1: %'ld / %'ld\n"
           "     2: %'ld / %'ld\n"
           "     4: %'ld / %'ld\n"
           "     8: %'ld / %'ld\n"
           "     s: %'ld\n",
           n_fast_access1, n_slow_access1,
           n_fast_access2, n_slow_access2,
           n_fast_access4, n_slow_access4,
           n_fast_access8, n_slow_access8,
           n_very_slow_access);
    PrintStatsForCache();
//    Printf("   Mops:\n"
//           "    total  = %'ld\n"
//           "    unique = %'ld\n",
//           mops_total, mops_uniq);
    Printf("   Publish: set: %'ld; get: %'ld; clear: %'ld\n",
           publish_set, publish_get, publish_clear);

    Printf("   PcTo: all: %'ld\n", pc_to_strings);

    Printf("   StackTrace: create: %'ld; delete %'ld\n",
           stack_trace_create, stack_trace_delete);

    Printf("   History segments: same: %'ld; reuse: %'ld; "
           "preallocated: %'ld; new: %'ld\n",
           history_uses_same_segment, history_reuses_segment,
           history_uses_preallocated_segment, history_creates_new_segment);
    Printf("   Forget all history: %'ld\n", n_forgets);

    PrintStatsForSeg();
    PrintStatsForSS();
    PrintStatsForLS();
  }

  void PrintStatsForSS() {
    Printf("   SegmentSet: created: %'ld; reused: %'ld;"
           " find: %'ld; recycle: %'ld\n",
           ss_create, ss_reuse, ss_find, ss_recycle);
    Printf("        sizes: 2: %'ld; 3: %'ld; 4: %'ld; other: %'ld\n",
           ss_size_2, ss_size_3, ss_size_4, ss_size_other);

    // SSEq is called at least (ss_find + ss_recycle) times since
    // FindExistingOrAlocateAndCopy calls map_.find()
    // and RecycleOneSegmentSet calls map_.erase(it)
    // Both find() and erase(it) require at least one call to SSHash and SSEq.
    //
    // Apart from SSHash call locations mentioned above,
    // SSHash is called for each AllocateAndCopy (ss_create + ss_reuse) times
    // for insert() AFTER it has already been called
    // by FindExistingOrAlocateAndCopy in case find() returned map_.end().
    // Hence the factor of 2.
    uintptr_t sseq_estimated = ss_find + ss_recycle,
            sshash_estimated = sseq_estimated + 2 * (ss_create + ss_reuse);
    Printf("   SSHash called %12ld times (vs. %12ld = +%d%%)\n"
           "   SSEq   called %12ld times (vs. %12ld = +%d%%)\n",
            sshash_calls, sshash_estimated,
            (sshash_calls - sshash_estimated)/(sshash_estimated/100 + 1),
            sseq_calls,   sseq_estimated,
            (sseq_calls   - sseq_estimated  )/(sseq_estimated/100 + 1));
  }
  void PrintStatsForCache() {
    Printf("   Cache:\n"
           "    new       = %'ld\n"
           "    delete    = %'ld\n"
           "    fetch     = %'ld\n"
           "    storage   = %'ld\n",
           cache_new_line,
           cache_delete_empty_line, cache_fetch,
           cache_max_storage_size);
  }

  void PrintStatsForSeg() {
    Printf("   Segment: created: %'ld; reused: %'ld\n",
           seg_create, seg_reuse);
  }

  void PrintStatsForLS() {
    Printf("   LockSet add: 0: %'ld; 1 : %'ld; n : %'ld\n",
           ls_add_to_empty, ls_add_to_singleton, ls_add_to_multi);
    Printf("   LockSet rem: 1: %'ld; n : %'ld\n",
           ls_remove_from_singleton, ls_remove_from_multi);
    Printf("   LockSet cache: add : %'ld; rem : %'ld; fast: %'ld\n",
           ls_add_cache_hit, ls_rem_cache_hit, ls_cache_fast);
    Printf("   LockSet size: 2: %'ld 3: %'ld 4: %'ld 5: %'ld other: %'ld\n",
           ls_size_2, ls_size_3, ls_size_4, ls_size_5, ls_size_other);
  }

  void PrintEventStats() {
    uintptr_t total = 0;
    for (int i = 0; i < LAST_EVENT; i++) {
      if (events[i]) {
        Printf("  %25s: %'ld\n", Event::TypeString((EventType)i),
               events[i]);
      }
      total += events[i];
    }
    Printf("  %25s: %'ld\n", "Total", total);
    for (size_t i = 0; i < TS_ARRAY_SIZE(memory_access_sizes); i++) {
      if (memory_access_sizes[i]) {
        Printf("  mop[%d]: %'ld\n", i, memory_access_sizes[i]);
      }
    }
    for (size_t i = 0; i < TS_ARRAY_SIZE(mops_per_trace); i++) {
      Printf("  mops_per_trace[%d] = %'ld\n", i, mops_per_trace[i]);
    }
    for (size_t i = 0; i < TS_ARRAY_SIZE(locks_per_trace); i++) {
      Printf("  locks_per_trace[%d] = %'ld\n", i, locks_per_trace[i]);
    }

    uintptr_t total_locks = 0;
    for (size_t i = 0; i < TS_ARRAY_SIZE(lock_sites); i++) {
      if(lock_sites[i] == 0) continue;
      Printf("lock_sites[%ld]=%ld\n", i, lock_sites[i]);
      total_locks += lock_sites[i];
    }
    Printf("lock_sites[*]=%ld\n", total_locks);
    Printf("futex_wait   =%ld\n", futex_wait);
    Printf("unlocked_access_ok =%'ld\n", unlocked_access_ok);
    uintptr_t all_locked_access = 0;
    for (size_t i = 0; i < TS_ARRAY_SIZE(locked_access); i++) {
      uintptr_t t = locked_access[i];
      if (t) Printf("locked_access[%ld]   =%'ld\n", i, t);
      all_locked_access += t;
    }
    Printf("locked_access[*]   =%'ld\n", all_locked_access);
    Printf("try_acquire_line_spin =%ld\n", try_acquire_line_spin);
    Printf("access to first 1/2/4 G: %'ld %'ld %'ld\n",
           access_to_first_1g, access_to_first_2g, access_to_first_4g);


    for (size_t i = 0; i < TS_ARRAY_SIZE(tleb_flush); i++) {
      if(tleb_flush[i] == 0) continue;
      Printf("tleb_flush[%ld]=%ld\n", i, tleb_flush[i]);
    }
    Printf("IgnoreBelowCache miss=%ld\n", ignore_below_cache_miss);
    for (size_t i = 0; i < TS_ARRAY_SIZE(msm_branch_count); i++) {
      if (msm_branch_count[i])
        Printf("msm_branch_count[%02d] = %'ld\n", i, msm_branch_count[i]);
    }
    if (read_proc_self_stats)
      Printf("read_proc_self_stats   =%ld\n", read_proc_self_stats);
  }



  uintptr_t n_vts_hb;
  uintptr_t n_vts_hb_cached;
  uintptr_t n_seg_hb;

  uintptr_t ls_add_to_empty, ls_add_to_singleton, ls_add_to_multi,
            ls_remove_from_singleton, ls_remove_from_multi,
            ls_add_cache_hit, ls_rem_cache_hit,
            ls_cache_fast,
            ls_size_2, ls_size_3, ls_size_4, ls_size_5, ls_size_other;

  uintptr_t cache_new_line;
  uintptr_t cache_delete_empty_line;
  uintptr_t cache_fetch;
  uintptr_t cache_max_storage_size;

  uintptr_t mops_total;
  uintptr_t mops_uniq;

  uintptr_t vts_create_big, vts_create_small,
            vts_clone, vts_delete_small, vts_delete_big,
            vts_total_delete, vts_total_create;

  uintptr_t ss_create, ss_reuse, ss_find, ss_recycle;
  uintptr_t ss_size_2, ss_size_3, ss_size_4, ss_size_other;

  uintptr_t sshash_calls, sseq_calls;

  uintptr_t seg_create, seg_reuse;

  uintptr_t publish_set, publish_get, publish_clear;

  uintptr_t pc_to_strings;

  uintptr_t stack_trace_create, stack_trace_delete;

  uintptr_t n_forgets;

  uintptr_t lock_sites[20];

  uintptr_t tleb_flush[10];

  uintptr_t ignore_below_cache_miss;

  uintptr_t try_acquire_line_spin;
  uintptr_t futex_wait;
  uintptr_t read_proc_self_stats;
};


// end. {{{1
#endif  // TS_STATS_
// vim:shiftwidth=2:softtabstop=2:expandtab:tw=80