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

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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
This commit is contained in:
Philippe Waroquiers 2013-01-17 23:57:35 +00:00
parent 661c1c2b7b
commit ac3eaed237
1 changed files with 2 additions and 1 deletions
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3
coregrind/m_debuginfo/debuginfo.c
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@ -2245,7 +2245,8 @@ static void find_DiCfSI ( /*OUT*/DebugInfo** diP,
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; }