>However, the cost seems to include overhead from valgrind itself, such >as malloc & other hooks. >(I see in the call graph that malloc calls "malloc_hook_ini" >once with a >cost of around 60,000 Ir. >Having only one a few mallocs in a particluar algorithm this overhead >greatly distorts test results. > >A second problem are symbol resolutions in the C library. Apparently >'_dl_runtime_resolve' is called once for each symbol used from >the C lib >(such as sprintf). This is also unwanted overhead.
Are you sure these hooks are from valgrind ? I think there are rather from glibc and similar, and callgrind properly shows that your code (indirectly) implies these calls. (I did a grep for malloc_hook_ini on recent Valgrind sources, and found no hit in .c or .h files). Philippe ____ This message and any files transmitted with it are legally privileged and intended for the sole use of the individual(s) or entity to whom they are addressed. If you are not the intended recipient, please notify the sender by reply and delete the message and any attachments from your system. Any unauthorised use or disclosure of the content of this message is strictly prohibited and may be unlawful. Nothing in this e-mail message amounts to a contractual or legal commitment on the part of EUROCONTROL, unless it is confirmed by appropriately signed hard copy. Any views expressed in this message are those of the sender. ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
