Re: [PATCH] bpf: enable program stats

2019-03-01 Thread Guenter Roeck
On Fri, Mar 01, 2019 at 02:17:40PM -0800, Eric Dumazet wrote: > > > On 03/01/2019 02:03 PM, Guenter Roeck wrote: > > Hi, > > > > On Mon, Feb 25, 2019 at 02:28:39PM -0800, Alexei Starovoitov wrote: > >> JITed BPF programs are indistinguishable from kernel functions, but unlike > >> kernel code BP

Re: [PATCH] bpf: enable program stats

2019-03-01 Thread Eric Dumazet
On 03/01/2019 02:03 PM, Guenter Roeck wrote: > Hi, > > On Mon, Feb 25, 2019 at 02:28:39PM -0800, Alexei Starovoitov wrote: >> JITed BPF programs are indistinguishable from kernel functions, but unlike >> kernel code BPF code can be changed often. >> Typical approach of "perf record" + "perf rep

Re: [PATCH] bpf: enable program stats

2019-03-01 Thread Eric Dumazet
On 03/01/2019 02:03 PM, Guenter Roeck wrote: > Hi, > > On Mon, Feb 25, 2019 at 02:28:39PM -0800, Alexei Starovoitov wrote: >> JITed BPF programs are indistinguishable from kernel functions, but unlike >> kernel code BPF code can be changed often. >> Typical approach of "perf record" + "perf rep

Re: [PATCH] bpf: enable program stats

2019-03-01 Thread Guenter Roeck
Hi, On Mon, Feb 25, 2019 at 02:28:39PM -0800, Alexei Starovoitov wrote: > JITed BPF programs are indistinguishable from kernel functions, but unlike > kernel code BPF code can be changed often. > Typical approach of "perf record" + "perf report" profiling and tuning of > kernel code works just as