On Wed, 14 Feb, at 10:46:20PM, Matt Fleming wrote: > On Mon, 12 Feb, at 04:16:42PM, Peter Zijlstra wrote: > > On Fri, Feb 09, 2018 at 05:59:12PM +0000, Jon Maloy wrote: > > > Command for TCP: > > > "netperf TCP_STREAM (netperf -n 4 -f m -c 4 -C 4 -P 1 -H 10.0.0.1 -t > > > TCP_STREAM -l 10 -- -O THROUGHPUT)" > > > Command for TIPC: > > > "netperf TIPC_STREAM (netperf -n 4 -f m -c 4 -C 4 -P 1 -H 10.0.0.1 -t > > > TCP_STREAM -l 10 -- -O THROUGHPUT)" > > > > That looks like identical tests to me. And my netperf (debian testing) > > doesn't appear to have -t TIPC_STREAM. > > > > Please try a coherent report and I'll have another look. Don't (again) > > forget to mention what kind of setup you're running this on. > > > > > > On my IVB-EP (2 sockets, 10 cores, 2 threads), performance cpufreq, > > PTI=n RETPOLINE=n, I get: > > Here's some more numbers. This is with RETPOLINE=y but you'll see it > doesn't make much of a difference. Oh, this is also with powersave > cpufreq governor.
Feh, I was wrong. The differences in performance I see are entirely due to CONFIG_RETPOLINE and CONFIG_PAGE_TABLE_ISOLATION being enabled.
