Hi, embedded users sometimes have to trace to tmpfs (e.g. streaming in not an option due to missing network connectivity).
Ramdisks of 16M to 128M size are created and as long as the ram disk does not get full, tracing works fine. Unfortunately if the disk gets full things fall apart: PERROR: Error in file write: No space left on device [in lttng_consumer_on_read_subbuffer_mmap() at consumer.c:1367] The consumer daemon will not be able to write the metadata channel and therefore the trace data set will be unusable (cannot be read with babeltrace). -rwxrwxrwx 1 testuser users 0 Nov 16 11:22 metadata -rwxrwxrwx 1 testuser users 15728640 Nov 16 11:22 myevents_0 -rwxrwxrwx 1 testuser users 4096 Nov 16 11:22 myevents_1 Is it possible to somehow reserve the file size (fallocate) for metadata so that in case the disk gets full at least the metadata gets written and the resulting trace set is readable with babeltrace ? I wonder if that is possible at all. The consumer daemon doesn't know upfront how much would need to be reserved for metadata, right ? Any ideas ? Thanks, Paul -- Paul Woegerer | SW Development Engineer http://go.mentor.com/sourceryanalyzer Mentor Embedded(tm) | Prinz Eugen Straße 72/2/4, Vienna, 1040 Austria Nucleus® | Linux® | Android(tm) | Services | UI | Multi-OS Android is a trademark of Google Inc. Use of this trademark is subject to Google Permissions. Linux is the registered trademark of Linus Torvalds in the U.S. and other countries. _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
