Gentle Reminder. Anybody can tell me how to test the JIT compiler ? Best, Shubham Bansal
On Thu, Mar 30, 2017 at 7:34 PM, Shubham Bansal <illusionist....@gmail.com> wrote: > Thanks Daniel. > > Can you tell me how to test the eBPF JIT compiler? It would be great > if you could tell me starting from compiling to proper testing. > Best, > Shubham Bansal > > > On Wed, Mar 29, 2017 at 5:30 AM, Daniel Borkmann <dan...@iogearbox.net> wrote: >> Hi Shubham, >> >> On 03/28/2017 10:49 PM, Shubham Bansal wrote: >> [...] >>> >>> Do you have any document to understand the working of tail calls? I >>> looked at your presentations but it seemed confusing to me. Anything >>> simple would be great, just about the tail calls. I don't think I need >>> examples, I can get them from your presentations. I just need a very >>> general idea. May be you know the code in kernel where it is >>> implemented. >> >> >> Sure, it's in __bpf_prog_run(), see the JMP_TAIL_CALL (kernel/bpf/core.c >> +1019). >> That's effectively what JITs implement. [1] page 3 has a high-level >> description >> as well, hope that helps. >> >> Thanks, >> Daniel >> >> [1] >> http://www.netdevconf.org/1.1/proceedings/papers/On-getting-tc-classifier-fully-programmable-with-cls-bpf.pdf
