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fixes to ctrl call stack lookup path

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This commit is contained in:
Ryan Fleury
2025-06-18 13:26:45 -07:00
parent df901b2497
commit 0ff246d13f
1 changed files with 8 additions and 7 deletions
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src/ctrl/ctrl_core.c
+8 -7
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@@ -3413,7 +3413,7 @@ ctrl_call_stack_from_thread(CTRL_Scope *scope, CTRL_EntityCtx *entity_ctx, CTRL_
B32 can_request = !ins_atomic_u64_eval(&ctrl_state->ctrl_thread_run_state); B32 can_request = !ins_atomic_u64_eval(&ctrl_state->ctrl_thread_run_state);
for(;;) for(;;)
{ {
//- rjf: step 1: [read-only] try to look for current call stack; wait if working //- rjf: [read-only] try to look for current call stack; wait if working
B32 node_exists = 0; B32 node_exists = 0;
B32 node_stale = 1; B32 node_stale = 1;
B32 node_working = 0; B32 node_working = 0;
@@ -3431,7 +3431,7 @@ ctrl_call_stack_from_thread(CTRL_Scope *scope, CTRL_EntityCtx *entity_ctx, CTRL_
break; break;
} }
} }
if(node_exists && (!node_stale || os_now_microseconds() >= endt_us)) if(node_exists && (!can_request || !node_stale || os_now_microseconds() >= endt_us))
{ {
call_stack = node->call_stack; call_stack = node->call_stack;
ctrl_scope_touch_call_stack_node__stripe_r_guarded(scope, stripe, node); ctrl_scope_touch_call_stack_node__stripe_r_guarded(scope, stripe, node);
@@ -3447,9 +3447,10 @@ ctrl_call_stack_from_thread(CTRL_Scope *scope, CTRL_EntityCtx *entity_ctx, CTRL_
} }
} }
//- rjf: step 2: [write] node does not exist => create; request if new or stale //- rjf: [write] node does not exist => create; request if new or stale
B32 need_request = (!node_exists || node_stale);
CTRL_CallStackCacheNode *node_to_request = 0; CTRL_CallStackCacheNode *node_to_request = 0;
if(!node_exists || node_stale) OS_MutexScopeW(stripe->rw_mutex) if(can_request && need_request) OS_MutexScopeW(stripe->rw_mutex)
{ {
CTRL_CallStackCacheNode *node = 0; CTRL_CallStackCacheNode *node = 0;
for(CTRL_CallStackCacheNode *n = slot->first; n != 0; n = n->next) for(CTRL_CallStackCacheNode *n = slot->first; n != 0; n = n->next)
@@ -3466,14 +3467,14 @@ ctrl_call_stack_from_thread(CTRL_Scope *scope, CTRL_EntityCtx *entity_ctx, CTRL_
DLLPushBack(slot->first, slot->last, node); DLLPushBack(slot->first, slot->last, node);
node->thread = thread->handle; node->thread = thread->handle;
} }
if(can_request && node->working_count == 0) if(node->working_count == 0)
{ {
node->working_count += 1; node->working_count += 1;
node_to_request = node; node_to_request = node;
} }
} }
//- rjf: step 3: request if needed //- rjf: request if needed
if(node_to_request != 0) if(node_to_request != 0)
{ {
if(ctrl_u2csb_enqueue_req(thread->handle, endt_us)) if(ctrl_u2csb_enqueue_req(thread->handle, endt_us))
@@ -3486,7 +3487,7 @@ ctrl_call_stack_from_thread(CTRL_Scope *scope, CTRL_EntityCtx *entity_ctx, CTRL_
} }
} }
//- rjf: step 4: out of time => exit //- rjf: out of time => exit
if(os_now_microseconds() >= endt_us) if(os_now_microseconds() >= endt_us)
{ {
break; break;