Attention is currently required from: Hoernchen. neels has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/30610 )
Change subject: logging: rework the macros ...................................................................... Patch Set 1: Code-Review-2 (2 comments) File include/osmocom/core/logging.h: https://gerrit.osmocom.org/c/libosmocore/+/30610/comment/3b84c434_dcbbf700 PS1, Line 64: if (log_check_level(ss, level)) \ it is a hugely important performance decision to do log_check_level() in the macro, *before* passing the varargs to logp2(). That is the entire point why log_check_level() was introduced in this way: if no logging target will print this log message, we can skip all of the string composition for the log message entirely. For example, in this: LOGP(DMAIN, LOGL_DEBUG, "data: %s\n", osmo_hexdump(data, len)); we skip calling osmo_hexdump() when DMAIN's DEBUG is not enabled anywhere. With your code changes, we would first call osmo_hexdump(), pass the result to logp2_with_check(), and only then discard the log message. That would be a massive performance dip for loaded sites where DEBUG logging is switched off. Now, because log_check_level() is called first, we need to check whether logging was initialized and redirect to logp_stub() even before that -- log_check_level() just aborts the program, with assert(osmo_log_info) File src/logging.c: https://gerrit.osmocom.org/c/libosmocore/+/30610/comment/afc179d9_a081d87a PS1, Line 87: struct log_info *osmo_log_info; (undoing part of earlier patch) -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/30610 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I03efa954cb9e991d2c3da4b61b12aac651e0efa2 Gerrit-Change-Number: 30610 Gerrit-PatchSet: 1 Gerrit-Owner: Hoernchen <ew...@sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanits...@sysmocom.de> Gerrit-Reviewer: neels <nhofm...@sysmocom.de> Gerrit-Attention: Hoernchen <ew...@sysmocom.de> Gerrit-Comment-Date: Thu, 15 Dec 2022 02:32:45 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: Yes Gerrit-MessageType: comment
