[dpdk-dev] [Bug 186] Huge testpmd startup time without --legacy-mem option

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=186

            Bug ID: 186
           Summary: Huge testpmd startup time without --legacy-mem option
           Product: DPDK
           Version: 18.05
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev at dpdk.org
          Reporter: maxime.coquelin at redhat.com
  Target Milestone: ---

Doing PVP testing, we noticed that testpmd startup time
is noticeably increased when not passing --legacy-mem option.

With 1G hugepages and below command lines, we measure ~2 seconds
with --legacy-mem option, and 13 seconds without:

testpmd -c 7 -n 4 --socket-mem 2048 0 -w 0000:00:02.0 --legacy-mem -- --burst
64 -i --rxq=2 --txq=2 --rxd=4096 --txd=1024 --coremask=6 --auto-start
--port-topology=chained --forward-mode=macswap

testpmd -c 7 -n 4 --socket-mem 2048 0 -w 0000:00:02.0 -- --burst 64 -i --rxq=2
--txq=2 --rxd=4096 --txd=1024 --coremask=6 --auto-start --port-topology=chained
--forward-mode=macswap

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