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| -rw-r--r-- | config/Config-kernel.in | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/config/Config-kernel.in b/config/Config-kernel.in index e993dc0d8c..8ebe1b7070 100644 --- a/config/Config-kernel.in +++ b/config/Config-kernel.in @@ -349,6 +349,19 @@ config KERNEL_PREEMPT_TRACER enabled. This option and the irqs-off timing option can be used together or separately.) +config KERNEL_HIST_TRIGGERS + bool "Histogram triggers" + depends on KERNEL_FTRACE + help + Hist triggers allow one or more arbitrary trace event fields to be + aggregated into hash tables and dumped to stdout by reading a + debugfs/tracefs file. They're useful for gathering quick and dirty + (though precise) summaries of event activity as an initial guide for + further investigation using more advanced tools. + + Inter-event tracing of quantities such as latencies is also + supported using hist triggers under this option. + config KERNEL_DEBUG_KERNEL bool default n |