On 8/28/15 7:14 PM, xiakaixu wrote:
Right, this is just a little example. Actually, I have tested this
ability on kernel side and user space side, that is kprobe and uprobe.
great to hear.
At this time i wish to get your comment on the current chosen implementation.
Now the struct perf_event_
δΊ 2015/8/29 9:28, Alexei Starovoitov ει:
> On 8/27/15 3:42 AM, Kaixu Xia wrote:
>> An example is pasted at the bottom of this cover letter. In that example,
>> we can get the cpu_cycles and exception taken in sys_write.
>>
>> $ cat /sys/kernel/debug/tracing/trace_pipe
>> $ ./perf record --event
On 8/27/15 3:42 AM, Kaixu Xia wrote:
An example is pasted at the bottom of this cover letter. In that example,
we can get the cpu_cycles and exception taken in sys_write.
$ cat /sys/kernel/debug/tracing/trace_pipe
$ ./perf record --event perf-bpf.o ls
...
cat-1653 [003
According to the discussions on this subject
https://lkml.org/lkml/2015/5/27/1027,
we want to give eBPF programs the ability to access hardware PMU counter
and use this ability with perf.
Now the kernel side patch set 'bpf: Introduce the new ability of eBPF
programs to access hardware PMU counter
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