From 26a74203f08c59922b4889931c108b34c4ee8e72 Mon Sep 17 00:00:00 2001 From: Brandt Bucher Date: Fri, 27 Sep 2024 09:38:04 -0700 Subject: [PATCH] GH-118093: Fix off-by-one errors in tier-up thresholds (GH-124447) --- Include/internal/pycore_backoff.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Include/internal/pycore_backoff.h b/Include/internal/pycore_backoff.h index 3db3aa3eb77879..a9d1bce127e63d 100644 --- a/Include/internal/pycore_backoff.h +++ b/Include/internal/pycore_backoff.h @@ -108,7 +108,7 @@ backoff_counter_triggers(_Py_BackoffCounter counter) /* Initial JUMP_BACKWARD counter. * This determines when we create a trace for a loop. * Backoff sequence 16, 32, 64, 128, 256, 512, 1024, 2048, 4096. */ -#define JUMP_BACKWARD_INITIAL_VALUE 16 +#define JUMP_BACKWARD_INITIAL_VALUE 15 #define JUMP_BACKWARD_INITIAL_BACKOFF 4 static inline _Py_BackoffCounter initial_jump_backoff_counter(void) @@ -122,7 +122,7 @@ initial_jump_backoff_counter(void) * otherwise when a side exit warms up we may construct * a new trace before the Tier 1 code has properly re-specialized. * Backoff sequence 64, 128, 256, 512, 1024, 2048, 4096. */ -#define SIDE_EXIT_INITIAL_VALUE 64 +#define SIDE_EXIT_INITIAL_VALUE 63 #define SIDE_EXIT_INITIAL_BACKOFF 6 static inline _Py_BackoffCounter