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GH-118093: Fix off-by-one errors in tier-up thresholds #124447

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Merged
merged 1 commit into from
Sep 27, 2024
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GH-118093: Fix off-by-one errors in tier-up thresholds #124447

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4 changes: 2 additions & 2 deletions Include/internal/pycore_backoff.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand All @@ -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
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