Re: [Valgrind-users] increase 32G limit?

[Maurice v. S. <ma...@bl...>]

Hi Julian, 

I have run valgrind 3.8.1 with your patch successfully on a job that neared 64G in memory allocation. 

Thanks again. 



][ Maurice van Swaaij ][ 


----- Original Message -----



Hi Julian, 

I have been running valgrind 3.8.1 with your patch but for various reasons (unrelated to valgrind) I haven't been able to keep that large job that needs more than 32G running long enough to arrive at a significant memory use. I'll let you know when it does. 

On a smaller job (using 18G) I do still get these messages: 

==15201== Warning: set address range perms: large range [0x247cd5040, 0x267cd5040) (undefined) 
==15201== Warning: set address range perms: large range [0x247cd5028, 0x267cd5058) (noaccess) 

but I understand they are not interfering with valgrind's operation. 

Thanks again for your help. 




][ Maurice van Swaaij ][ 


----- Original Message -----



Thanks, I'll try it out with 3.8.1 and let you know if it works. 




][ Maurice van Swaaij ][ 


----- Original Message -----


On Wednesday, January 02, 2013, Maurice van Swaaij wrote: 

> Now for my question: is it possible to go beyond the 32G memory allocation 
> limit? 

The patch below allows it to use up to 64G, that is, it doubles the 
available memory. If someone would test it properly, it might get 
committed; but so far we have had (AFAIK) no definitive "it works" 
feedback. 

J 

Index: memcheck/mc_main.c 
=================================================================== 
--- memcheck/mc_main.c (revision 13179) 
+++ memcheck/mc_main.c (working copy) 
@@ -167,10 +167,10 @@ 

#else 

-/* Just handle the first 32G fast and the rest via auxiliary 
+/* Just handle the first 64G fast and the rest via auxiliary 
primaries. If you change this, Memcheck will assert at startup. 
See the definition of UNALIGNED_OR_HIGH for extensive comments. */ 
-# define N_PRIMARY_BITS 19 
+# define N_PRIMARY_BITS 20 

#endif 

@@ -6524,11 +6524,11 @@ 
tl_assert(sizeof(Addr) == 8); 
tl_assert(sizeof(UWord) == 8); 
tl_assert(sizeof(Word) == 8); 
- tl_assert(MAX_PRIMARY_ADDRESS == 0x7FFFFFFFFULL); 
- tl_assert(MASK(1) == 0xFFFFFFF800000000ULL); 
- tl_assert(MASK(2) == 0xFFFFFFF800000001ULL); 
- tl_assert(MASK(4) == 0xFFFFFFF800000003ULL); 
- tl_assert(MASK(8) == 0xFFFFFFF800000007ULL); 
+ tl_assert(MAX_PRIMARY_ADDRESS == 0xFFFFFFFFFULL); 
+ tl_assert(MASK(1) == 0xFFFFFFF000000000ULL); 
+ tl_assert(MASK(2) == 0xFFFFFFF000000001ULL); 
+ tl_assert(MASK(4) == 0xFFFFFFF000000003ULL); 
+ tl_assert(MASK(8) == 0xFFFFFFF000000007ULL); 
# endif 
} 

Index: coregrind/m_aspacemgr/aspacemgr-linux.c 
=================================================================== 
--- coregrind/m_aspacemgr/aspacemgr-linux.c (revision 13179) 
+++ coregrind/m_aspacemgr/aspacemgr-linux.c (working copy) 
@@ -1649,7 +1649,7 @@ 
aspacem_minAddr = (Addr) 0x04000000; // 64M 

# if VG_WORDSIZE == 8 
- aspacem_maxAddr = (Addr)0x800000000 - 1; // 32G 
+ aspacem_maxAddr = (Addr)0x1000000000ULL - 1; // 64G 
# ifdef ENABLE_INNER 
{ Addr cse = VG_PGROUNDDN( sp_at_startup ) - 1; 
if (aspacem_maxAddr > cse) 



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