On 2015/8/29 10:49, Alexei Starovoitov wrote:
On 8/28/15 7:36 PM, Wangnan (F) wrote:
For current patch 32/32, I think it is useful enough for some simple
cases,
and we have already start using it internally. What about keep it as
what it
is now and create a independent method for your usecase
On 8/28/15 7:36 PM, Wangnan (F) wrote:
For current patch 32/32, I think it is useful enough for some simple cases,
and we have already start using it internally. What about keep it as
what it
is now and create a independent method for your usecase?
well, though the patch is small and contained,
On 2015/8/29 10:22, Alexei Starovoitov wrote:
On 8/28/15 7:15 PM, Wangnan (F) wrote:
I'd like to see whether it is possible to create dynamic tracepoints so
different receivers can listen on different tracepoints.
see my proposal A. I think ftrace instances might work for this.
I'm not sure
On 8/28/15 7:15 PM, Wangnan (F) wrote:
I'd like to see whether it is possible to create dynamic tracepoints so
different receivers can listen on different tracepoints.
see my proposal A. I think ftrace instances might work for this.
I'm not sure about 'format' part though. Kernel side shouldn'
On 2015/8/29 9:34, Alexei Starovoitov wrote:
On 8/28/15 6:19 PM, Wangnan (F) wrote:
For me, I use bpf_output_trace_data() to output information like PMU
count
value. Perf is the only receiver, so global collector is perfect.
Could you
please describe your usecase in more detail?
there is a
On 8/28/15 6:19 PM, Wangnan (F) wrote:
For me, I use bpf_output_trace_data() to output information like PMU count
value. Perf is the only receiver, so global collector is perfect. Could you
please describe your usecase in more detail?
there is a special receiver in user space that only wants th
On 2015/8/29 8:45, Alexei Starovoitov wrote:
On 8/28/15 12:06 AM, Wang Nan wrote:
his patch adds a new trace event to establish infrastruction for bpf to
output data to perf. Userspace perf tools can detect and use this event
as using the existing tracepoint events.
New bpf trace event entry
On 8/28/15 12:06 AM, Wang Nan wrote:
his patch adds a new trace event to establish infrastruction for bpf to
output data to perf. Userspace perf tools can detect and use this event
as using the existing tracepoint events.
New bpf trace event entry in debugfs:
/sys/kernel/debug/tracing/eve
From: He Kuang
There're scenarios that we need an eBPF program to record not only
kprobe point args, but also the PMU counters, time latencies or the
number of cache misses between two probe points and other information
when the probe point is entered.
This patch adds a new trace event to establ
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