[Xorp-hackers] Question of FEA strace

[Pavlin Radoslavov]

Ben Greear <greearb at candelatech.com> wrote:

> Any idea what is causing those writev messages?  It seems they are not
> passing much information, but doing so very often...  Having a hard
> time grepping through the code to see the originator...

Those are from the XRL mechanism.
I believe there are periodic keepalives between the XRL Finder and
each process that is controlled by that Finder, but they should be
on the order of once every few seconds or so.

Regards,
Pavlin

> 11:32:24.043438 writev(31, [{"Finder 0.2\nMsgType r\nSeqNo 5825\nMsgData 100 / \n", 47}], 1) = 47
> 11:32:24.043570 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
> 11:32:24.043644 rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
> 11:32:24.043705 writev(32, [{"Finder 0.2\nMsgType r\nSeqNo 5828\nMsgData 100 / \n", 47}], 1) = 47
> 11:32:24.043843 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
> 11:32:24.043910 clock_gettime(CLOCK_MONOTONIC, {768671, 208128378}) = 0
> 11:32:24.043957 clock_gettime(CLOCK_MONOTONIC, {768671, 208173677}) = 0
> 11:32:24.044004 select(68, [15 16 17 26 27 28 29 30 31 32 33 34 35 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 57 58 59 60 61 62 63 64 65 66 67], [28 30], [], {1, 397070}) = 2 (out [28 30], left {1, 397070})
> 11:32:24.044102 clock_gettime(CLOCK_MONOTONIC, {768671, 208318973}) = 0
> 11:32:24.044250 rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
> 11:32:24.044400 writev(28, [{"Finder 0.2\nMsgType r\nSeqNo 5835\nMsgData 100 / \n", 47}], 1) = 47
> 11:32:24.044514 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
> 11:32:24.044641 rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
> 11:32:24.044722 writev(30, [{"Finder 0.2\nMsgType r\nSeqNo 5832\nMsgData 100 / \n", 47}], 1) = 47
> 11:32:24.044864 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
> 11:32:24.044937 clock_gettime(CLOCK_MONOTONIC, {768671, 209152611}) = 0
> 
> Thanks,
> Ben
> 
> -- 
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
> 
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