commit 50863bb3d82fcf9126983e8519cc28f1b78a4715
author philippe <philippe@a5019735-40e9-0310-863c-91ae7b9d1cf9> Thu Jan 17 23:57:35 2013 +0000
committer philippe <philippe@a5019735-40e9-0310-863c-91ae7b9d1cf9> Thu Jan 17 23:57:35 2013 +0000
tree b42f1c5b917c3dfde4cc6be4b1e6ed280d682557
parent cafe50502ae73d6d6d0f214e06a4619e6cb1b278

Change the size of the hash table used to cache IP -> debuginfo to a prime nr

This change is based on rumours/legends/oral transmission of experience/...
that prime nrs are good to use for hash table size :).

If someone has a (short) explanation about why this is useful, 
that will be welcome.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13237 a5019735-40e9-0310-863c-91ae7b9d1cf9

coregrind/m_debuginfo/debuginfo.c

diff --git a/coregrind/m_debuginfo/debuginfo.c b/coregrind/m_debuginfo/debuginfo.c
index 95e1ea0..0a42325 100644
--- a/coregrind/m_debuginfo/debuginfo.c
+++ b/coregrind/m_debuginfo/debuginfo.c
@@ -2245,7 +2245,8 @@
    records are added all at once, when the debuginfo for an object is
    read, and is not changed ever thereafter. */
 
-#define N_CFSI_CACHE 511
+// Prime number, giving about 3K cache on 32 bits, 6K cache on 64 bits.
+#define N_CFSI_CACHE 509
 
 typedef
    struct { Addr ip; DebugInfo* di; Word ix; }