[tor-dev] Hogging of second_elapsed_callback()

[Linus Nordberg <linus@xxxxxxxxxxxxxx>]

Hi,

How long time can we spend signing status documents before tor gets sad?

I ask because I'm planning on putting dirauth signing keys on a
sloooooow HSM and would like to understand if I'd have to make
format_networkstatus_vote() and networkstatus_compute_consensus() (and
their callers) be "restartable", much like dirvote_act() is
"restartable".

Current measurements indicate a worst case figure of 6.5 seconds for a
hashing and signing operation. This may even increase some over
time. (It may also shrink considerably with some optimisations but this
is where we are today.)
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