Errata Table For Mac Download
Errata, Mahler Study Aids for Exam MAS-1, 2018 HCM, 11/13/18 Page 1 1, p. 2, in Table Contents put in bold: Stationary Distributions of Markov Chains 1, p. 18.97, the first row second column of the matrix should be 0.10. The tables below. Errata fixed in this step. Short Description. MAC provides incorrect status and corrupts frames when.
Errata Table For Mac Os
Slawek Kaplonski 2018-06-14 09:32:46 UTC +++ This bug was initially created as a clone of +++ We need to increase the default OpenvSwitch mac table size (2048) to something that works better with busy environments. Ovs-vsctl set bridge other-config:mac-table-size=50000 +++ This bug was initially created as a clone of +++ Description of problem: the CPU utilization of ovs-vswitchd is high without DPDK enabled PID USER PR NI VIRT RES SHR S%CPU%MEM TIME+ COMMAND 1512 root 10 - 78 R 1101 0.3 15810:26 ovs-vswitchd at the same time we were observing failures to send packets (ICMP) over VXLAN tunnel, we think this might be related to high CPU usage. --- Additional comment from Jiri Benc on 2018-05-31 14:03:36 EDT --- I managed to reproduce and analyze this. First, the reproduction steps. It's actually surprisingly simple once you explore all the blind alleys.
Create an ovs bridge: ------ ovs-vsctl add-br ovs0 ip l s ovs0 up ------ Save this to a file named 'reproducer.py': ------ #!/usr/bin/python from scapy.all import * data = [(str(RandMAC()), str(RandIP())) for i in range(int(sys.argv[1]))] s = conf.L2socket(iface='ovs0') while True: for mac, ip in data: p = Ether(src=mac, dst=mac)/IP(src=ip, dst=ip) s.send(p) ------ Run the reproducer:./reproducer.py 5000 --- Additional comment from Jiri Benc on 2018-05-31 14:26:26 EDT --- The problem is how flow revalidation works in ovs. There are several 'revalidator' threads launched. They should normally sleep (modulo waking every 0.5 second just to do nothing) and they wake if anything of interest happens (udpif_revalidator => poll_block). On every wake up, each revalidator thread checks whether flow revalidation is needed and if it is, it does the revalidation. The revalidation is very costly with high number of flows.
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