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1 /* SPDX-License-Identifier: GPL-2.0 */
14  * total_lost tells exactly how many events the kernel in fact lost, i.e. it is
18  * PERF_RECORD_LOST_SAMPLES event. The number of lost-samples events is stored
20  * exactly how many samples the kernel in fact dropped, i.e. it is the sum of
24  * The BPF program can discard samples according to the filter expressions given
26  * record in a PERF_RECORD_LOST_SAMPLES event.  To differentiate it from other
28  * header.misc field.  The number of dropped-samples events is stored in
30  * exactly how many samples the BPF program in fact dropped, i.e. it is the sum
34  * The total_period is needed because by default auto-freq is used, so
35  * multiplying nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
36  * the total number of low level events, it is necessary to sum all struct