[pypy-commit] stmgc c8-adaptive-trx-length-prolonged-backoff: Set exponential base back to two because the effect was insignificant

[tobweber]

Author: Tobias Weber <tobias_webe...@gmx.de>
Branch: c8-adaptive-trx-length-prolonged-backoff
Changeset: r2057:8170562e2157
Date: 2017-05-05 11:39 +0200
http://bitbucket.org/pypy/stmgc/changeset/8170562e2157/

Log:    Set exponential base back to two because the effect was
        insignificant

diff --git a/c8/stm/nursery.c b/c8/stm/nursery.c
--- a/c8/stm/nursery.c
+++ b/c8/stm/nursery.c
@@ -17,13 +17,13 @@
 #define DEFAULT_FILL_MARK_NURSERY_BYTES (NURSERY_SIZE / 4)
 // just double the size at max
 // #define LARGE_FILL_MARK_NURSERY_BYTES   DEFAULT_FILL_MARK_NURSERY_BYTES
-#define LARGE_FILL_MARK_NURSERY_BYTES   0x1000000000000L
+#define LARGE_FILL_MARK_NURSERY_BYTES   0x1000000000L
 // #define LARGE_FILL_MARK_NURSERY_BYTES   0x1000000000000000L
 
 uintptr_t stm_fill_mark_nursery_bytes = DEFAULT_FILL_MARK_NURSERY_BYTES;
 // uintptr_t stm_fill_mark_nursery_bytes = LARGE_FILL_MARK_NURSERY_BYTES;
 
-#define STM_MIN_RELATIVE_TRANSACTION_LENGTH (0.000000001f)
+#define STM_MIN_RELATIVE_TRANSACTION_LENGTH (0.000001f)
 static float stm_relative_transaction_length = 
STM_MIN_RELATIVE_TRANSACTION_LENGTH;
 static int stm_increase_transaction_length_backoff = 0;
 
@@ -42,7 +42,7 @@
 }
 
 static float get_new_transaction_length(bool aborts, float previous) {
-    const int multiplier = 1000;
+    const int multiplier = 2;
     float new = previous;
     if (aborts) {
         reset_or_decrease_backoff(true); // reset backoff
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