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Diffstat (limited to 'cmd')
| -rw-r--r-- | cmd/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/cmd/Kconfig b/cmd/Kconfig index dcf63f423fd..5fcf37e67b9 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1308,12 +1308,23 @@ config CMD_IO config CMD_IOTRACE bool "iotrace - Support for tracing I/O activity" + depends on IO_TRACE help Provides an 'iotrace' command which supports recording I/O reads and writes in a trace buffer in memory . It also maintains a checksum of the trace records (even if space is exhausted) so that the sequence of I/O accesses can be verified. + Example output from the 'iotrace stats' command is below. + + iotrace is enabled + Start: 10000000 (buffer start address) + Size: 00010000 (buffer size) + Offset: 00000120 (current buffer offset) + Output: 10000120 (start + offset) + Count: 00000018 (number of trace records) + CRC32: 9526fb66 (CRC32 of all trace records) + When debugging drivers it is useful to see what I/O accesses were done and in what order. |