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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Team / Jerin, I am trying to use DPDK Trace Library functionality in my DPDK application.= I've successfully observed the trace files being generated by invoking rt= e_trace_save(), particularly when utilizing the EAL option '--trace=3D.*' I found following statement in the programmer guide, The trace memory will be allocated through an internal function __rte_trace= _mem_per_thread_alloc(). The trace memory will be allocated per thread to e= nable lock less trace-emit function. For non lcore threads, the trace memory is allocated on the first trace emi= ssion. For lcore threads, if trace points are enabled through a EAL option, the tr= ace memory is allocated when the threads are known of DPDK (rte_eal_init fo= r EAL lcores, rte_thread_register for non-EAL lcores). Otherwise, when trac= e points are enabled later in the life of the application, the behavior is = the same as non lcore threads and the trace memory is allocated on the firs= t trace emission. I attempted to enable trace points at runtime using the 'rte_trace_regexp("= lib.mempool.*", true)' API, though I'm unsure if this is the correct approa= ch. While the call appears to succeed, I'm puzzled by the absence of any tr= ace files being generated even after invoking rte_trace_save(). When adding a new trace point in my application code as per the documentati= on, I used rte_trace_regexp("myapp.trace.test", true) to enable it. However= , I encountered a failure when attempting to look up the API. Apr 22 09:53:07.486 [USDP] [DPDK] EAL: rte_trace_regexp():207 NAG1:inside r= te_trace_regexp Apr 22 09:53:07.486 [USDP] [DPDK] EAL: rte_trace_regexp():212 NAG2:inside r= te_trace_regexp Apr 22 09:53:07.486 [USDP] [DPDK] EAL: rte_trace_regexp():231 NAG4:inside r= te_trace_regexp Apr 22 09:53:07.486 [USDP] ***NAG***: DPDK-TRACE:rte_trace_regexp failed I have the following queries, 1. How to enable/disable the trace files runtime in a dpdk applicatio= n? 2. How to trigger new trace points added in the application code? Regards, Nagendra --_000_DM6PR10MB412433B99D325702745D584C961A2DM6PR10MB4124namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Team / Jerin,

 

I am trying to use DPDK Trace Library functionality = in my DPDK application.  I've successfully observed the trace files be= ing generated by invoking rte_trace_save(), particularly when util= izing the EAL option '--trace=3D.*'


I found following statement in the programmer guide,

The trace memory wi= ll be allocated through an internal function __rte_trace_mem_per_thread_all= oc(). The trace memory will be allocated per thread to enable lock less tra= ce-emit function.

For non lcore threa= ds, the trace memory is allocated on the first trace emission.

For lcore threads, = if trace points are enabled through a EAL option, the trace memory is alloc= ated when the threads are known of DPDK (rte_eal_init for EAL lcores, rte_t= hread_register for non-EAL lcores). Otherwise, when = trace points are enabled later in the life of the application, t= he behavior is the same as non lcore threads and the trace memory is alloca= ted on the first trace emission.

I attempted to enable trace points at runtime using = the 'rte_trace_regexp("lib.mempool.*", true)' API, though = I'm unsure if this is the correct approach. While the call appears to succe= ed, I'm puzzled by the absence of any trace files being generated even after invoking rte_trace_save().

When adding a new trace point in my application code as per the documentati= on, I used rte_trace_regexp("myapp.trace.test", true) to enable it. H= owever, I encountered a failure when attempting to look up the API.


Apr 22 09:53:07.486 [USDP] [DPDK] EAL: rte_trace_regexp():207 NAG1:i= nside rte_trace_regexp

Apr 22 09:53:07.486 [USDP] [DPDK] EAL: rte_trace_= regexp():212 NAG2:inside rte_trace_regexp

Apr 22 09:53:07.486 [USDP] [DPDK] EAL: rte_trace_= regexp():231 NAG4:inside rte_trace_regexp

Apr 22 09:53:07.486 [USDP] ***NAG***: DPDK-TRACE:rte= _trace_regexp failed

I have the following queries,

 

1.     &= nbsp; How to enable/disable the trace files runtime in a = dpdk application?

2.     &= nbsp; How to trigger new trace points added in the applic= ation code?

 

Regards,
Nagendra

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