Hi, Am 05.04.2016 um 10:17 schrieb Nenad Merdanovic:
I am not sure, as I haven't even be able to reliably reproduce it on 1.5 (though we are running with some backports from 1.6) as it seems to be traffic-pattern related. On one workload I exhibit instant and constant jump in CPU usage (from 40% to 80-100%, about 50:50 sys:usr), but on other, there are just some very short spikes to 100%.
I've played around with an unscientific testcase (single session, large 10MB response), perf and ltrace, and while the number of SSL_Write calls are the same, OpenSSL seems to be doing more low level stuff in functions like _x86_DES_encrypt and _x86_DES_decrypt.
So this commit does make OpenSSL uncomfortable in some way, although it is probably
not related to the number of SSL_write calls. Not sure if this is helpful. cheers, lukas
