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Message-ID: <87pnouwyg9.fsf@concordia.ellerman.id.au> Date: Tue, 07 May 2019 16:49:58 +1000 From: Michael Ellerman <mpe@...erman.id.au> To: Daniel Borkmann <daniel@...earbox.net> Cc: bpf@...r.kernel.org, netdev@...r.kernel.org Subject: Re: selftests/bpf/test_tag takes ~30 minutes? Daniel Borkmann <daniel@...earbox.net> writes: > On 04/30/2019 03:21 PM, Michael Ellerman wrote: >> Hi Daniel, >> >> I'm running selftests/bpf/test_tag and it's taking roughly half an hour >> to complete, is that expected? >> >> I don't really grok what the test is doing TBH, but it does appear to be >> doing it 5 times :) >> >> for (i = 0; i < 5; i++) { >> do_test(&tests, 2, -1, bpf_gen_imm_prog); >> do_test(&tests, 3, fd_map, bpf_gen_map_prog); >> } >> >> Could we make it just do one iteration by default? That would hopefully >> reduce the runtime by quite a bit. It could take a parameter to run the >> longer version perhaps? > > On my 2.5 years old laptop it's taking 16 seconds. ;) Hrm. I guess I need to dig into why it's taking so long then :) Today it takes 10s on the same machine :/ Is it affected by the BPF JIT being enabled/disabled? cheers
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