在 2017/2/7 下午2:46, Eric Dumazet 写道: > On Mon, Feb 6, 2017 at 10:21 PM, panxinhui <xin...@linux.vnet.ibm.com> wrote: > >> hi all >> I do some netperf tests and get some benchmark results. >> I also attach my test script and netperf-result(Excel) >> HI, all I use loopback interface to run netperf tests, #tc qd add dev lo root pfifo limit 10000 #ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc pfifo state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
and put the result in netperf.xlsx(excel) It is a 32 vcpus P8 machine, with 32Gib memory. This time spinlock is the best one, qspinlock > pvqspinlock. So sad. thanks xinhui >> There are two machine. one runs netserver and the other runs netperf >> benchmark. 1000Mbps network is connected with them. >> >> #ip link infomation >> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state >> UNKNOWN mode DEFAULT group default qlen 1000 >> link/ether ba:68:9c:14:32:02 brd ff:ff:ff:ff:ff:ff >> >> According to the results, there is not much performance gap with each other. >> And as we are only testing the throughput, the pvqspinlock shows the >> overhead of its pv stuff. but qspinlock shows a little improvement than >> spinlock. My simple summary in this testcase is >> qspinlock > spinlock > pvqspinlock. >> >> when run 200 concurrent netperf, I paste the total throughput here. >> >> concurrent runners| total throughput | variance >> ------------------------------------------- >> spinlock | 199 | 66882.8 | 89.93 >> ------------------------------------------- >> qspinlock | 199 | 66350.4 | 72.0239 >> ------------------------------------------- >> pvqspinlock | 199 | 64740.5 | 85.7837 >> >> You could see more data in nerperf.xlsx >> >> thanks >> xinhui > > > Hi xinhui > > 1Gbit NIC is too slow for this use case. I would try a 10Gbit NIC at least... > > Alternatively, you could use loopback interface. (netperf -H 127.0.0.1) > > tc qd add dev lo root pfifo limit 10000 >
netperf.xlsx
Description: MS-Excel 2007 spreadsheet