Achieving Top Network Performance - Red Hat Summit
Achieving Top Network Performance - Red Hat Summit Achieving Top Network Performance - Red Hat Summit
Tuning – sysctl settings●We need more buffers● net.core.netdev_max_backlog = 250000● net.core.wmem_max = 16777216● net.core.rmem_default = 16777216● net.core.wmem_default = 16777216● net.core.optmem_max = 16777216● net.ipv4.tcp_mem = 16777216 16777216 16777216● net.ipv4.tcp_rmem = 4096 87380 16777216● net.ipv4.tcp_wmem = 4096 65536 16777216● net.core.rmem_max = 16777216
Tuning – step 4●More buffers# ./netperf -l 30 -H 172.17.200.82 -T 12,12 -tTCP_SENDFILETCP SENDFILE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INETto 172.17.200.82 (172.17.200.82) port 0 AF_INET : spininterval : demo : cpu bindRecv Send SendSocket Socket Message ElapsedSize Size Size Time Throughputbytes bytes bytes secs. 10^6bits/sec87380 16384 16384 30.00 37354.41● We are done !
- Page 32 and 33: RHEL6 “tuned-adm” profiles# tun
- Page 34 and 35: Kernel Bypass Technologies - Pros a
- Page 36 and 37: Offload - Solarflare OpenOnloadAver
- Page 38 and 39: KVM Network ArchitectureVirtioConte
- Page 40 and 41: KVM Network Architecture - vhost_ne
- Page 42 and 43: Latency comparison - RHEL 6Network
- Page 44 and 45: Host CPU Consumption virtio vs vhos
- Page 46 and 47: KVM Network Architecture - PCI Devi
- Page 48 and 49: KVM Network Architecture - SR-IOV
- Page 50 and 51: KVM Architecture - Device Assignmen
- Page 52 and 53: RHEL6 - new features●●●●●
- Page 54 and 55: RHEL6 - new features●●Add getso
- Page 56 and 57: Receive Steering - improved message
- Page 58 and 59: Tuning Knobs - Overview●●●By
- Page 60 and 61: sysctl - View and set /proc/sys set
- Page 62 and 63: sysctl - TCP related settings●TCP
- Page 64 and 65: Why Bother ? - Teaser 1effect of ne
- Page 67 and 68: lspci - details# lspci -vvvs 81:00.
- Page 69 and 70: Why Bother - A quick teaser● ifco
- Page 71 and 72: Tuning- first pass bottleneck resol
- Page 73 and 74: Tuning - second pass setup●●●
- Page 75 and 76: Tuning - irqbalance disabled, netpe
- Page 77 and 78: Tuning - second pass●mpstat on th
- Page 79 and 80: Tuning - step 3●Try TCP_SENDFILE#
- Page 81: Tuning - checking ethtool -S eth4
- Page 85 and 86: Tuning - sanity check●Sometimes m
- Page 87 and 88: Throttling - cgroups in Action
- Page 89 and 90: Cgroup default mount points# cat /e
- Page 91 and 92: cgroups[root@dhcp1001950 ~]#
- Page 93 and 94: incorrect bindings
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