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Add visualization of multi-threaded waiting time with verilator_gantt (#5929)

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Bartłomiej Chmiel
2025-04-10 10:03:58 -04:00
committed by GitHub
parent fc8e1b5a2e
commit 84f26ed3d7
12 changed files with 156 additions and 69 deletions
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src/V3ExecGraph.cpp
+12
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@@ -726,7 +726,13 @@ void addMTaskToFunction(const ThreadSchedule& schedule, const uint32_t threadId,
varp->protect(false); // Do not protect as we still have references in AstText
modp->addStmtsp(varp);
// For now, reference is still via text bashing
if (v3Global.opt.profExec()) {
addStrStmt("VL_EXEC_TRACE_ADD_RECORD(vlSymsp).threadScheduleWaitBegin();\n");
}
addStrStmt("vlSelf->" + name + +".waitUntilUpstreamDone(even_cycle);\n");
if (v3Global.opt.profExec()) {
addStrStmt("VL_EXEC_TRACE_ADD_RECORD(vlSymsp).threadScheduleWaitEnd();\n");
}
}
if (v3Global.opt.profPgo()) {
@@ -878,8 +884,14 @@ void addThreadStartToExecGraph(AstExecGraph* const execGraphp,
}
V3Stats::addStatSum("Optimizations, Thread schedule total tasks", i);
if (v3Global.opt.profExec()) {
addStrStmt("VL_EXEC_TRACE_ADD_RECORD(vlSymsp).threadScheduleWaitBegin();\n");
}
addStrStmt("vlSelf->__Vm_mtaskstate_final__" + std::to_string(scheduleId) + tag
+ ".waitUntilUpstreamDone(vlSymsp->__Vm_even_cycle__" + tag + ");\n");
if (v3Global.opt.profExec()) {
addStrStmt("VL_EXEC_TRACE_ADD_RECORD(vlSymsp).threadScheduleWaitEnd();\n");
}
// Free all assigned worker indices in this section
if (!v3Global.opt.hierBlocks().empty() && last > 0) {
addStrStmt("vlSymsp->__Vm_threadPoolp->freeWorkerIndexes(indexes);\n");