On 01/09/2014 11:46 PM, Sam Varshavchik wrote: > Lenz Weber writes: > >> I'm currently investigating some serious performance problems when using >> courier-0.66.1ubuntu4 in combination with >> gnutls-3.0.11+really2.12.14-5ubuntu3.5, which would be the usual >> combination if one were to compile courier using the --with-gnutls >> config flag in the lastest Ubuntu LTS version 12.04. [...] > However, I happened to have sources of 3.2.7 handy, and from poking > around, those syscalls appear to be coming out of > wrap_nettle_rnd_refresh() in lib/nettle/rnd.c, which appears to have > something to do with reseeding an internal random number pool. It looks > like there's a lot of work happening here; and I don't quite follow why > that needs to be done for each call to gnutls_record_send(); but that's > as far as I could go, with what I know.
the ubuntu version Lenz mentioned is "really2.12.14", which means it's
built against gcrypt, not nettle, iiuc. sorry i don't have more help to
offer on this at the moment, but just wanted to avoid anyone doing a
goose chase down into the nettle code for this situation.
--dkg
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