Messages in this thread | | | Date | Thu, 30 May 2019 14:07:10 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCHv3 00/12] perf tools: Display eBPF code in intel_pt trace |
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On Thu, May 30, 2019 at 06:54:39PM +0800, Leo Yan wrote: > Hi Jiri, > > On Wed, May 08, 2019 at 03:19:58PM +0200, Jiri Olsa wrote: > > hi, > > this patchset adds dso support to read and display > > bpf code in intel_pt trace output. I had to change > > some of the kernel maps processing code, so hopefully > > I did not break too many things ;-) > > > > It's now possible to see bpf code flow via: > > > > # perf-with-kcore record pt -e intel_pt//ku -- sleep 1 > > # perf-with-kcore script pt --insn-trace --xed > > This is very interesting work for me! > > I want to verify this feature with Arm CoreSight trace, I have one > question so that I have more direction for the tesing: > > What's the bpf program you are suing for the testing? e.g. some > testing program under the kernel's folder $kernel/samples/bpf? > Or you uses perf command to launch bpf program?
for this I was using tools/testing/selftests/bpf/test_verifier
I isolated some tests and ran the perf on top of them, like:
# perf-with-kcore record pt -e intel_pt//ku -- ./test_verifier ...
I had to add some small sleep before the test_verifier exit, so the perf bpf thread could catch up and download the program details before test_verifier exited.
jirka
> > [...] > > Thanks > Leo Yan
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