Re: [dpdk-stable] [PATCH v2] app/testpmd: support non contiguous socket ids

["Wu, Jingjing" <jingjing.wu@intel.com>]

> -----Original Message-----
> From: Shahaf Shuler [mailto:shahafs@mellanox.com]
> Sent: Sunday, May 7, 2017 2:06 PM
> To: Wu, Jingjing <jingjing.wu@intel.com>
> Cc: dev@dpdk.org; Thomas Monjalon <thomas@monjalon.net>;
> stable@dpdk.org
> Subject: RE: [PATCH v2] app/testpmd: support non contiguous socket ids
> 
> Saturday, May 6, 2017 4:41 AM, Wu, Jingjing:
> > >
> > > The test assumes the socket ids are contiguous. This is not
> > > necessarily the case on all servers and may cause mempool creation to fail.
> > >
> > > Fixing it by detecting the list of valid socket ids and use it for
> > > the mempool creation.
> > >
> > > Fixes: 7acf894d07d1 ("app/testpmd: detect numa socket count")
> > >
> > > CC: stable@dpdk.org
> > > Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
> > > ---
> > > on v2:
> > >  * fix minor typo on commit message : be->by.
> > > ---
> > >  app/test-pmd/parameters.c | 38 ++++++++++++++++++++++++++++-----
> > -----
> > >  app/test-pmd/testpmd.c    | 38 +++++++++++++++++++++++++++++------
> > ---
> > >  app/test-pmd/testpmd.h    |  4 +++-
> > >  3 files changed, 60 insertions(+), 20 deletions(-)
> > >
> 
> [..]
> 
> > > diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index
> > > dfe64427d..a556a8aff 100644
> > > --- a/app/test-pmd/testpmd.c
> > > +++ b/app/test-pmd/testpmd.c
> 
> [..]
> 
> > > +/*
> > >   * Setup default configuration.
> > >   */
> > >  static void
> > > @@ -388,12 +405,14 @@ set_default_fwd_lcores_config(void)
> > >
> > >  	nb_lc = 0;
> > >  	for (i = 0; i < RTE_MAX_LCORE; i++) {
> > > -		sock_num = rte_lcore_to_socket_id(i) + 1;
> > > -		if (sock_num > max_socket) {
> > > -			if (sock_num > RTE_MAX_NUMA_NODES)
> > > -				rte_exit(EXIT_FAILURE, "Total sockets
> > greater
> > > than %u\n", RTE_MAX_NUMA_NODES);
> > > -			max_socket = sock_num;
> > > +		sock_num = rte_lcore_to_socket_id(i);
> > +1 is missed?
> 
> I don't think so.
> On previous implementation this logic was meant to find the max_socket.
> max_socket was the first invalid socket_id and was used, for example :
> 
> if (socket_id >= max_socket) {
> 
> or
> 
> for (i = 0; i < max_socket; i++)
> 
> now, on above logic, we list the valid socket id. Therefore
> rte_lcore_to_socket_id return a valid id and not need to add 1.
> 
> 
OK, but at list the following check "if (sock_num > RTE_MAX_NUMA_NODES)"
Should be "if (sock_num +1 > RTE_MAX_NUMA_NODES)", right?

One more thing, if this patch is fixing a bug, I think "fix" should be added in title.

Thanks
Jingjing