refs #5672 #5742 suppress race we know about on size_current/size_evicting,...

refs #5672 #5742 suppress race we know about on size_current/size_evicting, suppress more warnings from that helgrind bug

git-svn-id: file:///svn/toku/tokudb@50725 c7de825b-a66e-492c-adef-691d508d4ae1

ft/cachetable-internal.h

@@ -400,7 +400,12 @@ private:
     void decrease_size_evicting(long size_evicting_estimate);
     bool should_sleeping_clients_wakeup();
     bool eviction_needed();
-    
+
+    // We have some intentional races with these variables because we're ok with reading something a little bit old.
+    // Provide some hooks for reading variables in an unsafe way so that there are function names we can stick in a valgrind suppression.
+    int64_t unsafe_read_size_current(void) const;
+    int64_t unsafe_read_size_evicting(void) const;
+
     pair_list* m_pl;
     int64_t m_size_current;            // the sum of the sizes of the pairs in the cachetable
     // changes to these two values are protected

ft/cachetable.cc

@@ -3453,8 +3453,6 @@ static void *eviction_thread(void *evictor_v) {
 //
 void evictor::init(long _size_limit, pair_list* _pl, KIBBUTZ _kibbutz, uint32_t eviction_period) {
     TOKU_VALGRIND_HG_DISABLE_CHECKING(&m_ev_thread_is_running, sizeof m_ev_thread_is_running);
-    TOKU_VALGRIND_HG_DISABLE_CHECKING(&m_size_current, sizeof m_size_current);
-    TOKU_VALGRIND_HG_DISABLE_CHECKING(&m_size_evicting, sizeof m_size_evicting);
 
     m_low_size_watermark = _size_limit;
     // these values are selected kind of arbitrarily right now as 
@@ -3984,7 +3982,7 @@ void evictor::signal_eviction_thread() {
 // the values may be a little off, but we think that is tolerable.
 //
 bool evictor::should_client_thread_sleep(){
-    return m_size_current > m_high_size_watermark;
+    return unsafe_read_size_current() > m_high_size_watermark;
 }
 
 //
@@ -3996,7 +3994,7 @@ bool evictor::should_client_thread_sleep(){
 // the values may be a little off, but we think that is tolerable.
 //
 bool evictor::should_sleeping_clients_wakeup() {
-    return m_size_current <= m_high_size_hysteresis;
+    return unsafe_read_size_current() <= m_high_size_hysteresis;
 }
 
 // 
@@ -4012,9 +4010,9 @@ bool evictor::should_sleeping_clients_wakeup() {
 // calling this function.
 //
 bool evictor::should_client_wake_eviction_thread() {
-    return 
+    return
         !m_ev_thread_is_running &&
-        ((m_size_current - m_size_evicting) > m_low_size_hysteresis);
+        ((unsafe_read_size_current() - unsafe_read_size_evicting()) > m_low_size_hysteresis);
 }
 
 //
@@ -4026,6 +4024,15 @@ bool evictor::eviction_needed() {
     return (m_size_current - m_size_evicting) > m_low_size_watermark;
 }
 
+inline int64_t evictor::unsafe_read_size_current(void) const {
+    return m_size_current;
+}
+
+inline int64_t evictor::unsafe_read_size_evicting(void) const {
+    return m_size_evicting;
+}
+
+
 void evictor::fill_engine_status() {
     STATUS_VALUE(CT_SIZE_CURRENT)           = m_size_current;
     STATUS_VALUE(CT_SIZE_LIMIT)             = m_low_size_hysteresis;

src/tests/drd.suppressions

@@ -89,3 +89,13 @@
    drd:ConflictingAccess
    fun:_ZNK4toku8locktree46unsafe_read_single_txnid_optimization_possibleEv
 }
+{
+   unsafe_read_size_evicting
+   drd:ConflictingAccess
+   fun:_ZNK7evictor25unsafe_read_size_evictingEv
+}
+{
+   unsafe_read_size_current
+   drd:ConflictingAccess
+   fun:_ZNK7evictor24unsafe_read_size_currentEv
+}

src/tests/helgrind.suppressions

@@ -40,20 +40,20 @@
    fun:_ZNK4toku8locktree46unsafe_read_single_txnid_optimization_possibleEv
 }
 {
-   kde_bug_307082_cond_destroy_without_signal
-   Helgrind:Misc
-   ...
-   fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
-   fun:_ZN4toku12lock_request7destroyEv
-   fun:_Z22toku_db_get_range_lockP9__toku_dbP13__toku_db_txnPK10__toku_dbtS5_N4toku12lock_request4typeE
+   unsafe_read_size_evicting
+   Helgrind:Race
+   fun:_ZNK7evictor25unsafe_read_size_evictingEv
+}
+{
+   unsafe_read_size_current
+   Helgrind:Race
+   fun:_ZNK7evictor24unsafe_read_size_currentEv
 }
 {
    kde_bug_307082_cond_destroy_without_signal
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
    ...
    fun:_ZL14ctpair_destroyP6ctpair
 }
@@ -62,7 +62,7 @@
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_ZL14rwlock_destroyP6rwlock
    fun:_ZL16nb_mutex_destroyP8nb_mutex
    fun:_Z23toku_blocktable_destroyPP11block_table
@@ -72,7 +72,7 @@
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_Z11bjm_destroyP29background_job_manager_struct
 }
 {
@@ -80,28 +80,23 @@
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_Z24toku_txn_manager_destroyP11txn_manager
-   fun:_Z17toku_logger_closePP10tokulogger
 }
 {
    kde_bug_307082_cond_destroy_without_signal
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_Z24toku_thread_pool_destroyPP16toku_thread_pool
-   fun:_Z31toku_ft_serialize_layer_destroyv
-   fun:_Z21toku_ft_layer_destroyv
-   fun:_Z16toku_ydb_destroyv
-   fun:_ZL17libtokudb_destroyv
 }
 {
    kde_bug_307082_cond_destroy_without_signal
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_Z22toku_minicron_shutdownP8minicron
 }
 {
@@ -109,7 +104,7 @@
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_ZN4toku12lock_request7destroyEv
 }
 {
@@ -117,6 +112,6 @@
    Helgrind:Misc
    ...
    fun:pthread_cond_destroy@*
-   fun:_ZL17toku_cond_destroyP9toku_cond
+   ...
    fun:_Z17toku_logger_closePP10tokulogger
 }