Hi Shirley, Please refer the section 20.3 [Multi-Process Limitations] in DPDK Programmers Guide.
The use of function pointers between multiple processes running based of different compiled binaries is not supported, since the location of a given function in one process may be different to its location in a second. This prevents the librte_hash library from behaving properly as in a multi-threaded instance, since it uses a pointer to the hash function internally. To work around this issue, it is recommended that multi-process applications perform the hash calculations by directly calling the hashing function from the code and then using the rte_hash_add_with_hash()/ rte_hash_lookup_with_hash() functions instead of the functions which do the hashing internally, such as rte_hash_add()/rte_hash_lookup() Thanks Venkat On 10 June 2014 17:05, Neil Horman <nhorman at tuxdriver.com> wrote: > On Tue, Jun 10, 2014 at 11:02:03AM +0300, Uri Sidler wrote: > > Hi, > > I am currently using a hash table in a multi-process environment. > > the master process creates the hash table which is later used by other > > secondary processes. > > but the secondary processes fail to use the hash table since the hash > > function address actually points to a different fucntion. (this makes > sense > > since the address of the hash function is in fact different per process). > > How can I solve this issue? > > > > Thanks, > > Shirley. > > > > Use shared memory. see shmget > > Neil > >
