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GH-126795: Increase the JIT side-exit threshold from 64 to 4096 #127155

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Merged
merged 3 commits into from
Dec 4, 2024
Merged

GH-126795: Increase the JIT side-exit threshold from 64 to 4096 #127155

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89ae662
Crank the warmup up to 256
brandtbucher Nov 20, 2024
11add0f
Crank the warmup up to 1024
brandtbucher Nov 20, 2024
a8a4ed3
Crank the warmup up to 4096
brandtbucher Nov 20, 2024
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7 changes: 3 additions & 4 deletions Include/internal/pycore_backoff.h
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Original file line number Diff line number Diff line change
Expand Up @@ -115,10 +115,9 @@ initial_jump_backoff_counter(void)
/* Initial exit temperature.
* Must be larger than ADAPTIVE_COOLDOWN_VALUE,
* 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 63
#define SIDE_EXIT_INITIAL_BACKOFF 6
* a new trace before the Tier 1 code has properly re-specialized. */
#define SIDE_EXIT_INITIAL_VALUE 4095
#define SIDE_EXIT_INITIAL_BACKOFF 12

static inline _Py_BackoffCounter
initial_temperature_backoff_counter(void)
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