RE: Re:RE: Re:RE: [EXTERNAL] [PATCH] graph: optimize graph search when scheduling nodes

[Jerin Jacob <jerinj@marvell.com>]

> -----Original Message-----
> From: Huichao Cai <chcchc88@163.com>
> Sent: Wednesday, November 13, 2024 2:52 PM
> To: Jerin Jacob <jerinj@marvell.com>
> Cc: David Marchand <david.marchand@redhat.com>; Kiran Kumar
> Kokkilagadda <kirankumark@marvell.com>; Nithin Kumar Dabilpuram
> <ndabilpuram@marvell.com>; yanzhirun_163@163.com; dev@dpdk.org;
> Thomas Monjalon <thomas@monjalon.net>; Robin Jarry <rjarry@redhat.com>
> Subject: Re:RE: Re:RE: [EXTERNAL] [PATCH] graph: optimize graph search when
> scheduling nodes
> 
> > [main] [dpdk. org] $ git diff > diff --git
> > a/lib/graph/rte_graph_worker_common. h
> > b/lib/graph/rte_graph_worker_common. h > index a518af2b2a. . 
> > ec9a82186d 100644 > --- a/lib/graph/rte_graph_worker_common. h > +++
> > b/lib/graph/rte_graph_worker_common. h
> 
> > [main] [dpdk.org] $ git diff
> > diff --git a/lib/graph/rte_graph_worker_common.h
> > b/lib/graph/rte_graph_worker_common.h
> > index a518af2b2a..ec9a82186d 100644
> > --- a/lib/graph/rte_graph_worker_common.h
> > +++ b/lib/graph/rte_graph_worker_common.h
> > @@ -104,6 +104,7 @@ struct __rte_cache_aligned rte_node {
> >         /** Original process function when pcap is enabled. */
> >         rte_node_process_t original_process;
> 
> > +       alignas(RTE_CACHE_LINE_MIN_SIZE)
> >         union {
> 
> Hi, Jerin
> The C++standard cannot align anonymous unions. Do we need to fill in reserved
> fields in order to maintain union alignment with RTE-CAHE_LINE_LIN_SIZE
> bytes?


You can bring it inside the structure.

> 
> >                 /* Fast schedule area for mcore dispatch model */
> >                 struct {
> > @@ -112,6 +113,7 @@ struct __rte_cache_aligned rte_node {
> >                         uint64_t total_sched_fail; /**< Number of scheduled failure. */
> >                 } dispatch;
> >         };
> > +       alignas(RTE_CACHE_LINE_MIN_SIZE)
> >         rte_graph_off_t xstat_off; /**< Offset to xstat counters. */
> >         /* Fast path area  */
> >         __extension__ struct __rte_cache_aligned {
> 
> 
> FAILED: buildtools/chkincs/chkincs-cpp.p/meson-
> generated_rte_graph_worker.cpp.o
> ccache c++ -Ibuildtools/chkincs/chkincs-cpp.p -Ibuildtools/chkincs -
> I../buildtools/chkincs -Iexamples/l3fwd -I../examples/l3fwd -
> I../examples/common -Idrivers/bus/vdev -I../drivers/bus/vdev -I. -I.. -Iconfig -
> I../config -Ilib/eal/include -I../lib/eal/include -Ilib/eal/linux/include -
> I../lib/eal/linux/include -Ilib/eal/x86/include -I../lib/eal/x86/include -
> I../kernel/linux -Ilib/eal/common -I../lib/eal/common -Ilib/eal -I../lib/eal -
> Ilib/kvargs -I../lib/kvargs -Ilib/log -I../lib/log -Ilib/metrics -I../lib/metrics -
> Ilib/telemetry -I../lib/telemetry -Idrivers/bus/pci -I../drivers/bus/pci -
> I../drivers/bus/pci/linux -Ilib/pci -I../lib/pci -Idrivers/bus/vmbus -
> I../drivers/bus/vmbus -I../drivers/bus/vmbus/linux -Ilib/argparse -
> I../lib/argparse -Ilib/ptr_compress -I../lib/ptr_compress -Ilib/ring -I../lib/ring -
> Ilib/rcu -I../lib/rcu -Ilib/mempool -I../lib/mempool -Ilib/mbuf -I../lib/mbuf -
> Ilib/net -I../lib/net -Ilib/meter -I../lib/meter -Ilib/ethdev -I../lib/ethdev -
> Ilib/cmdline -I../lib/cmdline -Ilib/hash -I../lib/hash -Ilib/timer -I../lib/timer -
> Ilib/acl -I../lib/acl -Ilib/bbdev -I../lib/bbdev -Ilib/bitratestats -I../lib/bitratestats -
> Ilib/bpf -I../lib/bpf -Ilib/cfgfile -I../lib/cfgfile -Ilib/compressdev -
> I../lib/compressdev -Ilib/cryptodev -I../lib/cryptodev -Ilib/distributor -
> I../lib/distributor -Ilib/dmadev -I../lib/dmadev -Ilib/efd -I../lib/efd -Ilib/eventdev
> -I../lib/eventdev -Ilib/dispatcher -I../lib/dispatcher -Ilib/gpudev -I../lib/gpudev -
> Ilib/gro -I../lib/gro -Ilib/gso -I../lib/gso -Ilib/ip_frag -I../lib/ip_frag -Ilib/jobstats -
> I../lib/jobstats -Ilib/latencystats -I../lib/latencystats -Ilib/lpm -I../lib/lpm -
> Ilib/member -I../lib/member -Ilib/pcapng -I../lib/pcapng -Ilib/power -
> I../lib/power -Ilib/rawdev -I../lib/rawdev -Ilib/regexdev -I../lib/regexdev -
> Ilib/mldev -I../lib/mldev -Ilib/rib -I../lib/rib -Ilib/reorder -I../lib/reorder -
> Ilib/sched -I../lib/sched -Ilib/security -I../lib/security -Ilib/stack -I../lib/stack -
> Ilib/vhost -I../lib/vhost -Ilib/ipsec -I../lib/ipsec -Ilib/pdcp -I../lib/pdcp -Ilib/fib -
> I../lib/fib -Ilib/port -I../lib/port -Ilib/pdump -I../lib/pdump -Ilib/table -I../lib/table
> -Ilib/pipeline -I../lib/pipeline -Ilib/graph -I../lib/graph -Ilib/node -I../lib/node -
> fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -
> Wnon-virtual-dtor -Wextra -Werror -g -include rte_config.h -march=corei7 -
> mrtm -MD -MQ buildtools/chkincs/chkincs-cpp.p/meson-
> generated_rte_graph_worker.cpp.o -MF buildtools/chkincs/chkincs-
> cpp.p/meson-generated_rte_graph_worker.cpp.o.d -o
> buildtools/chkincs/chkincs-cpp.p/meson-generated_rte_graph_worker.cpp.o -c
> buildtools/chkincs/chkincs-cpp.p/rte_graph_worker.cpp
> In file included from
> /home/runner/work/dpdk/dpdk/lib/graph/rte_graph_model_rtc.h:6,
>                  from
> /home/runner/work/dpdk/dpdk/lib/graph/rte_graph_worker.h:9,
>                  from buildtools/chkincs/chkincs-cpp.p/rte_graph_worker.cpp:1:
> /home/runner/work/dpdk/dpdk/lib/graph/rte_graph_worker_common.h:108:1
> 5: error: attribute ignored in declaration of ‘union rte_node::<unnamed>’ [-
> Werror=attributes]
>   108 |         union {
>       |               ^
> /home/runner/work/dpdk/dpdk/lib/graph/rte_graph_worker_common.h:108:1
> 5: note: attribute for ‘union rte_node::<unnamed>’ must follow the ‘union’
> keyword
> cc1plus: all warnings being treated as errors [5410/6569] Compiling C++ object
> buildtools/chkincs/chkincs-cpp.p/meson-generated_rte_table_lpm.cpp.o
> [5411/6569] Compiling C++ object buildtools/chkincs/chkincs-cpp.p/meson-
> generated_rte_port_in_action.cpp.o
> [5412/6569] Compiling C++ object buildtools/chkincs/chkincs-cpp.p/meson-
> generated_rte_pipeline.cpp.o
> [5413/6569] Compiling C++ object buildtools/chkincs/chkincs-cpp.p/meson-
> generated_rte_table_action.cpp.o
> [5414/6569] Compiling C++ object buildtools/chkincs/chkincs-cpp.p/meson-
> generated_rte_swx_ipsec.cpp.o
> ninja: build stopped: subcommand failed.