1.. SPDX-License-Identifier: GPL-2.0 2 3SIGINT BEHAVIOR 4=============== 5 6On the first SIGINT, RTLA exits after collecting all outstanding samples up to 7the point of receiving the signal. 8 9When receiving more than one SIGINT, RTLA discards any outstanding samples, and 10exits while displaying only samples that have already been processed. 11 12If SIGINT is received during RTLA cleanup, RTLA exits immediately via 13the default signal handler. 14 15Note: For the purpose of SIGINT behavior, the expiry of duration specified via 16the -d/--duration option is treated as equivalent to receiving a SIGINT. For 17example, a SIGINT received after duration expired but samples have not been 18processed yet will drop any outstanding samples. 19 20Also note that when using the timerlat tool in BPF mode, samples are processed 21in-kernel; RTLA only copies them out to display them to the user. A second 22SIGINT does not affect in-kernel sample aggregation. 23 24EXIT STATUS 25=========== 26 27:: 28 29 0 Passed: the test did not hit the stop tracing condition 30 1 Error: invalid argument 31 2 Failed: the test hit the stop tracing condition 32 129 Help: either user requested help or incorrect option was specified 33 34REPORTING BUGS 35============== 36Report bugs to <linux-kernel@vger.kernel.org> 37and <linux-trace-devel@vger.kernel.org> 38 39LICENSE 40======= 41**rtla** is Free Software licensed under the GNU GPLv2 42 43COPYING 44======= 45Copyright \(C) 2021 Red Hat, Inc. Free use of this software is granted under 46the terms of the GNU Public License (GPL). 47