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> From: David Marchand <david.marchand@redhat.com></div>
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> Sent: Thursday, October 3, 2024 10:13 AM</div>
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> To: Mattias Rönnblom <mattias.ronnblom@ericsson.com>; Van Haaren, Harry <harry.van.haaren@intel.com></div>
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> Cc: dev@dpdk.org <dev@dpdk.org>; stephen@networkplumber.org <stephen@networkplumber.org>; suanmingm@nvidia.com <suanmingm@nvidia.com>; thomas@monjalon.net <thomas@monjalon.net>; stable@dpdk.org <stable@dpdk.org>; Tyler Retzlaff <roretzla@linux.microsoft.com>;
Aaron Conole <aconole@redhat.com></div>
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> Subject: Re: [PATCH v2] service: fix deadlock on worker lcore exit</div>
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> </div>
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> On Thu, Oct 3, 2024 at 8:57 AM David Marchand <david.marchand@redhat.com> wrote:</div>
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> ></div>
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> > From: Mattias Rönnblom <mattias.ronnblom@ericsson.com></div>
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> ></div>
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> > Calling rte_exit() from a worker lcore thread causes a deadlock in</div>
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> > rte_service_finalize().</div>
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> ></div>
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> > This patch makes rte_service_finalize() deadlock-free by avoiding the</div>
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> > need to synchronize with service lcore threads, which in turn is</div>
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> > achieved by moving service and per-lcore state from the heap to being</div>
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> > statically allocated.</div>
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> ></div>
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> > The BSS segment increases with ~156 kB (on x86_64 with default</div>
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> > RTE_MAX_LCORE and RTE_SERVICE_NUM_MAX).</div>
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> ></div>
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> > According to the service perf autotest, this change also results in a</div>
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> > slight reduction of service framework overhead.</div>
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> ></div>
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> > Fixes: 33666b448f15 ("service: fix crash on exit")</div>
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> > Cc: stable@dpdk.org</div>
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> ></div>
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> > Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com></div>
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> > Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com></div>
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> > ---</div>
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> > Changes since v1:</div>
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> > - rebased,</div>
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> I can't merge this patch in its current state.</div>
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> At the moment, two CI report a problem with the</div>
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> eal_flags_file_prefix_autotest unit test.</div>
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> -------------------------------------stdout-------------------------------------</div>
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> RTE>>eal_flags_file_prefix_autotest</div>
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> Running binary with argv[]:'/home/zhoumin/gh_dpdk/build/app/dpdk-test'</div>
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> '--proc-type=secondary' '-m' '18' '--file-prefix=memtest'</div>
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> Running binary with argv[]:'/home/zhoumin/gh_dpdk/build/app/dpdk-test'</div>
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> '-m' '18' '--file-prefix=memtest1'</div>
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> Error - hugepage files for memtest1 were not deleted!</div>
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> Test Failed</div>
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> RTE>></div>
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> Can you have a look?</div>
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<br>
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Not sure how the code change in question is relating to the eal-flags failure, but I can reproduce the failure here.</div>
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Reproducing issue on *all* of the below tags; this indicates its likely a board-config issue, and not a true issue (unless its been there since 23.11??).</div>
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<br>
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Tested commits were all bad:</div>
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b3485f4293 (HEAD, tag: v24.07) version: 24.07.0</div>
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a9778aad62 (HEAD, tag: v24.03) version: 24.03.0</div>
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eeb0605f11 (HEAD, tag: v23.11) version: 23.11.0</div>
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So I'm pretty sure this is a board/runner config issue, with the error output as follows here:</div>
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RTE>>eal_flags_file_prefix_autotest</div>
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Running binary with argv[]:'./app/test/dpdk-test' '--proc-type=secondary' '-m' '18' '--file-prefix=memtest'</div>
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EAL: Detected CPU lcores: 64</div>
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EAL: Detected NUMA nodes: 2</div>
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EAL: Detected static linkage of DPDK</div>
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EAL: Cannot open '/var/run/dpdk/memtest/config' for rte_mem_config</div>
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EAL: FATAL: Cannot init config</div>
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EAL: Cannot init config</div>
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FAIL:</div>
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DPDK_TEST=eal_flags_file_prefix_autotest ./app/test/dpdk-test --no-pci</div>
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PASS:</div>
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DPDK_TEST=eal_flags_file_prefix_autotest ./app/test/dpdk-test </div>
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So seems like the eal-flags test is NOT able to handle args like "--no-pci"? I tend to run tests in no PCI mode to speed up things :)</div>
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In short, this service-cores patch is not the root cause. Perhaps some of the CI folks can confirm if there's extra args passed to the runner?</div>
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Regards, -Harry</div>
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