Lines Matching refs:sample

30     - [Group samples into sample entries](#group-samples-into-sample-entries)
56 4. Each time a given number of events happen, the kernel dumps a sample to the mapped buffers.
75 The report-sample command: reports each sample in perf.data, used for supporting integration of
327 The record command is used to dump samples of the profiled processes. Each sample can contain
328 information like the time at which the sample was generated, the number of events since last
329 sample, the program counter of a thread, the call chain of a thread.
335 # Record on process 7394 for 10 seconds, using default event (cpu-cycles), using default sample
385 # Record with sample frequency 1000: sample 1000 times every second running.
388 # Record with sample period 100000: sample 1 time every 100000 events.
393 used for generating samples (default is 25%), and decreases the max allowed sample frequency when
398 # Record with sample frequency 10000, with max allowed cpu percent to be 50%.
479 When --trace-offcpu is used, simpleperf generates a sample when a running thread is scheduled out,
481 generated with --trace-offcpu, we use time to the next sample (instead of event counts from the
482 previous sample) as the weight of the current sample. As a result, we can get a call graph based
536 contains a table of sample entries. Each sample entry is a row in the report. The report command
537 groups samples belong to the same process, thread, library, function in the same sample entry. Then
538 sort the sample entries based on the event count a sample entry has.
541 into sample entries, and where to find profiling data and binaries.
543 Below is an example. Records are grouped into 4 sample entries, each entry is a row. There are
544 several columns, each column shows piece of information belonging to a sample entry. The first
545 column is Overhead, which shows the percentage of events inside the current sample entry in total
551 # thread name(comm), process id(pid), thread id(tid), function name(symbol), and showing sample
617 ### Group samples into sample entries
619 The report command uses --sort to decide how to group sample entries.
623 # sample entry.
627 # thread name are in the same sample entry.
631 # the same sample entry.