You could try to figure out which version of BSD supports socket watermarking and run a test with that. I strongly suspect that excessive returns from epoll are the cause here. Socket watermarking does not work on Linux. http://lkml.iu.edu/hypermail/linux/kernel/0412.1/0680.html --- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/20#issuecomment-158479186 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1