Re: [PATCH] net/iavf:fix slow memory allocation

[David Marchand <david.marchand@redhat.com>]

Hello,

On Tue, Dec 27, 2022 at 7:06 AM You, KaisenX <kaisenx.you@intel.com> wrote:
> > > > > > > I tried to play a bit with a E810 nic on a dual numa and I
> > > > > > > can't see anything wrong for now.
> > > > > > > Can you provide a simple and small reproducer of your issue?
> > > > > > >
> > > > > > > Thanks.
> > > > > > >
> > > > > > This is my environment:
> > > > > > Enter "lscpu" on the command line:
> > > > > > NUMA:
> > > > > >         NUMA node(s): 2
> > > > > >         NUMA node0 CPU(S) : 0-27,56-83
> > > > > >         NUMA node1 CPU(S) : 28-55,84-111
> > > > > >
> > > > > > List the steps to reproduce the issue:
> > > > > >
> > > > > > 1. create vf and blind to dpdk
> > > > > > echo 1 > /sys/bus/pci/devices/0000\:ca\:00.0/sriov_ numvfs
> > > > > > ./usertools/dpdk-devbind. py -b vfio-pci 0000:ca:01.0 2. launch
> > > > > > testpmd ./x86_ 64-native-linuxapp-clang/app/dpdk-testpmd -l
> > > > > > 28-48 -n 4 -a 0000:ca:01.0 --file-prefix=dpdk_ 525342_
> > > > > > 20221104042659 -- -i
> > > > > > --rxq=256 --txq=256
> > > > > > --total-num-mbufs=500000
> > > > > >
> > > > > > Parameter Description:
> > > > > >  "-l 28-48":The range of parameter values after "-l" must be on
> > > > > > "NUMA
> > > > > node1 CPU(S)"
> > > > > >  "0000:ca:01.0":inset on node1
> > > > > - Back to your topic.
> > > > > Can you try this simple hack:
> > > > >
> > > > > diff --git a/lib/eal/common/eal_common_thread.c
> > > > > b/lib/eal/common/eal_common_thread.c
> > > > > index c5d8b4327d..92160c7fa6 100644
> > > > > --- a/lib/eal/common/eal_common_thread.c
> > > > > +++ b/lib/eal/common/eal_common_thread.c
> > > > > @@ -253,6 +253,7 @@ static void *ctrl_thread_init(void *arg)
> > > > >         void *routine_arg = params->arg;
> > > > >
> > > > >         __rte_thread_init(rte_lcore_id(), cpuset);
> > > > > +       RTE_PER_LCORE(_socket_id) = SOCKET_ID_ANY;
> > > > >         params->ret = pthread_setaffinity_np(pthread_self(),
> > > sizeof(*cpuset),
> > > > >                 cpuset);
> > > > >         if (params->ret != 0) {
> > > > >
> > > > Thanks for your advice.
> > > >
> > > > But this issue still exists after I tried.
> > >
> > > Ok, I think I understand what is wrong... but I am still guessing as I
> > > am not sure what your "issue" is.
> > > Can you have a try with:
> > > https://patchwork.dpdk.org/project/dpdk/patch/20221221104858.296530-
> > 1-
> > > david.marchand@redhat.com/
> > >
> > > Thanks.
> > >
> > I think this issue is similar to the description in the patch you gave me.
> >
> > when the DPDK application is started only on one numa node, Interrupt
> > thread find memory on another numa node. This leads to a whole set of
> > memory allocation/release operations every time when "rte_malloc" is called.
> > This is the root cause of this issue.
> >
> > This issue can be solved after I tried.
> > Thanks for your advice.
>
> After further testing in a different environment, we found the issue still
> existed in your last patch.  After troubleshooting, it is found that in the
> "malloc_get_numa_socket()" API, if the return value of "rte_socket_id()"
> is "SOCKET_ID_ANY" (- 1), the API will return
> "rte_lcore_to_socket_id (rte_get_main_lcore())";
> Otherwise, "malloc_get_numa_socket()" API will directly return
> "the return value of rte_socket_id()",in this case, the issue cannot be solved.
>
> And the return value of "rte_socket_id()" is modified by the solution you
> suggested in your last email (RTE_PER_LCORE (_socket_id)=SOCKET_ ID_ ANY;).
> Therefore, I think merging your two suggestions together could completely solve this issue.
>
> Can you please update your accordingly?

Please try the last revision and report back.
https://patchwork.dpdk.org/project/dpdk/list/?series=26362

Thanks.

-- 
David Marchand