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[Perf] (MG_Remote/Client): The create window's shipped depth is 6, and its ceiling 8.

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BZLZHH
2026-09-26 11:26:54 +08:00
parent 1f1ece8a33
commit 102f2ca7d5
8 changed files with 123 additions and 40 deletions
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MobileGL/ConfigLoader.cpp
+14 -7
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@@ -412,12 +412,15 @@ namespace MobileGL::MG_ConfigLoader {
// xxHash64 changed since the last push are shipped.
ipc.PersistentHashSuppress = QueryEnvUint32("MOBILEGL_IPC_PERSISTENT_HASH_SUPPRESS", 1, 0, 1);
ipc.BatchWaits = QueryEnvUint32("MOBILEGL_IPC_BATCH_WAITS", 1, 0, 1);
// The create window. DEFAULT 2, and it works because a link that declares RetainsReplies
// The create window. DEFAULT 6, and it works because a link that declares RetainsReplies
// keeps a declared answer until its reader takes it - Config.h carries the three reasons it
// was inert before and the device numbers (28.66 s at 1, 17.27 s at 2, 11.02 s at 4).
// Capped at 4: the retained set is bounded by the window's own depth, and 4 is what the
// declared-answer store's capacity is written against.
ipc.CreateWindow = QueryEnvUint32("MOBILEGL_IPC_CREATE_WINDOW", 2, 1, 4);
// was inert before, the device numbers, and the sweep that put the default at 6 rather
// than 4 or 8 (the curve flattens at 6: 4->5 buys 1.92 s, 5->6 0.53 s, 6->8 nothing).
// Capped at 8: the retained set is bounded by the window's own depth, the store holds 24
// declared answers, and the device sweep showed the wall clock still falling at the old
// cap of 4 (see WireTables.cpp's kCreateWindowMax). WireTables.cpp's static_assert and
// StreamLink's crossing log are the checks on this number.
ipc.CreateWindow = QueryEnvUint32("MOBILEGL_IPC_CREATE_WINDOW", 6, 1, 8);
// The verify harness compares the pushed block against the applier per verb; a
// batched queue lets the comparer read a supplied field mid-apply, which is a
// torn read rather than a divergence. The batch is therefore off whenever the
@@ -514,12 +517,16 @@ namespace MobileGL::MG_ConfigLoader {
if (MG_Config::Transport == MG_Config::TransportMode::Monolith) return;
// One line, on the arm where these numbers decide behaviour, because every one of
// them is a number a bug report has to quote.
// CREATE-WINDOW IS IN THIS LINE BECAUSE A RUN HAS TO SAY WHICH WINDOW IT USED. It was
// missing while the value was a number nobody varied, and the moment it became one that
// changes the wall clock by seconds (the P12 sweep: 28.3 s at 1 down to 10.8 s at 6) a
// log that does not name it makes every run ambiguous about its own configuration.
MGLOG_I("Config: IPC ring=%uMiB stage=%uMiB wire-deferred=%uMiB spin=%uus event-wait=%ums "
"persistent-block=%uKiB "
"persistent-block=%uKiB create-window=%u "
"adopt-tier=%u verb-barrier=%u run-ahead=%u present-credit=%u control-timeout=%ums "
"cold-start=%ums strict=%d audit=%d role-split-state=%d affinity='%s' surface=%s",
ipc.RingMb, ipc.StageMb, ipc.WireDeferredMb, ipc.SpinUs, ipc.EventWaitMs,
ipc.PersistentBlockKb, ipc.AdoptTier,
ipc.PersistentBlockKb, ipc.CreateWindow, ipc.AdoptTier,
ipc.VerbBarrier, ipc.RunAhead, ipc.PresentCredit, ipc.ControlTimeoutMs, ipc.ColdStartMs,
static_cast<int>(ipc.StrictErrors), static_cast<int>(ipc.Audit),
static_cast<int>(ipc.RoleSplitState), ipc.ServerAffinity.c_str(),