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(UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: LqbC+6+Lp3eglYfrphwpaZy1VQKzDPjY1TMZuvlnYwh86n3zaybk1kk0GuUrkE8+QUbBrKr3xmiA7uPZswLB6w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR18MB5253 X-Proofpoint-GUID: 8d1ET1kM-7nn2_apnmB-RfKiOXfYxSKb X-Proofpoint-ORIG-GUID: 8d1ET1kM-7nn2_apnmB-RfKiOXfYxSKb X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-12_04,2022-10-11_02,2022-06-22_01 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org > -----Original Message----- > From: David Marchand > Sent: Tuesday, October 4, 2022 3:14 PM > To: dev@dpdk.org > Cc: skori@mavell.com; Jerin Jacob Kollanukkaran ; > stable@dpdk.org; Sunil Kumar Kori > Subject: [EXT] [PATCH v2 5/9] trace: fix dynamically enabling trace point= s >=20 > External Email >=20 > ---------------------------------------------------------------------- > Enabling trace points at runtime was not working if no trace point had be= en > enabled first at rte_eal_init() time. The reason was that trace.args refl= ected > the arguments passed to --trace=3D EAL option. >=20 > To fix this: > - the trace subsystem initialisation is updated: trace directory > creation is deferred to when traces are dumped (to avoid creating > directories that may not be used), > - per lcore memory allocation still relies on rte_trace_is_enabled() but > this helper now tracks if any trace point is enabled. The > documentation is updated accordingly, > - cleanup helpers must always be called in rte_eal_cleanup() since some > trace points might have been enabled and disabled in the lifetime of > the DPDK application, >=20 > With this fix, we can update the unit test and check that a trace point c= allback > is invoked when expected. >=20 > Note: > - the 'trace' global variable might be shadowed with the argument > passed to the functions dealing with trace point handles. > 'tp' has been used for referring to trace_point object. > Prefer 't' for referring to handles, >=20 > Fixes: 84c4fae4628f ("trace: implement operation APIs") > Cc: stable@dpdk.org >=20 > Signed-off-by: David Marchand > --- > Changes since v1: > - restored level to INFO for trace directory log message, > - moved trace_mkdir() to rte_trace_save, >=20 > --- > app/test/test_trace.c | 20 ++++++++++ > app/test/test_trace.h | 2 + > doc/guides/prog_guide/trace_lib.rst | 14 +++++-- > lib/eal/common/eal_common_trace.c | 53 ++++++++++--------------- > lib/eal/common/eal_common_trace_utils.c | 11 ++++- > lib/eal/common/eal_trace.h | 3 +- > 6 files changed, 65 insertions(+), 38 deletions(-) >=20 [snip] > diff --git a/lib/eal/common/eal_common_trace_utils.c > b/lib/eal/common/eal_common_trace_utils.c > index 2b55dbec65..7bf1c05e12 100644 > --- a/lib/eal/common/eal_common_trace_utils.c > +++ b/lib/eal/common/eal_common_trace_utils.c > @@ -314,14 +314,18 @@ trace_dir_default_path_get(char *dir_path) > return 0; > } >=20 > -int > +static int > trace_mkdir(void) > { > struct trace *trace =3D trace_obj_get(); > char session[TRACE_DIR_STR_LEN]; > + static bool already_done; > char *dir_path; > int rc; >=20 > + if (already_done) > + return 0; > + As trace_mkdir() call is being moved to rte_trace_save() so there won't be = another context which will be invoking trace_mkdir(). So is this logic still needed here ? > if (!trace->dir_offset) { > dir_path =3D calloc(1, sizeof(trace->dir)); > if (dir_path =3D=3D NULL) { > @@ -365,6 +369,7 @@ trace_mkdir(void) > } >=20 > RTE_LOG(INFO, EAL, "Trace dir: %s\n", trace->dir); > + already_done =3D true; > return 0; > } >=20 > @@ -434,6 +439,10 @@ rte_trace_save(void) > if (trace->nb_trace_mem_list =3D=3D 0) > return rc; >=20 > + rc =3D trace_mkdir(); > + if (rc < 0) > + return rc; > + > rc =3D trace_meta_save(trace); > if (rc) > return rc; [snip] > 2.37.3