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diff --git a/Documentation/nvme-predictable-lat-log.txt b/Documentation/nvme-predictable-lat-log.txt new file mode 100644 index 0000000..f0b2ad3 --- /dev/null +++ b/Documentation/nvme-predictable-lat-log.txt @@ -0,0 +1,70 @@ +nvme-predictable-lat-log(1) +=========================== + +NAME +---- +nvme-predictable-lat-log - Send Predictable latency per NVM set log page request, +returns result and log + +SYNOPSIS +-------- +[verse] +'nvme predictable-lat-log' <device> [--nvmset-id=<nvmset_id> | -i <nvmset_id>] + [--raw-binary | -b] + [--output-format=<fmt> | -o <fmt>] [--verbose | -v] + +DESCRIPTION +----------- +Retrieves the NVMe Predictable latency per NVM set log page from an NVMe device +and provides the returned structure. + +The <device> parameter is mandatory and may be either the NVMe character +device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). + +On success, the returned Predictable latency per NVM set log structure +may be returned in one of several ways depending on the option flags; the +structure may parsed by the program and printed in a readable format or +the raw buffer may be printed to stdout for another program to parse. + +OPTIONS +------- +-i <nvmset_id>:: +--nvmset-id=<nvmset_id>:: + Retrieve the Predictable latency per NVM set log for the given nvmset id. + This argument is mandatory and its success may depend on the device's + statistics to provide this log For More details see NVM Express 1.4 Spec. + Section 5.14.1.10. The default nvmset id to use is 1 for the device. + +-b:: +--raw-binary:: + Print the raw Predictable latency per NVM set log buffer to stdout. + +-o <fmt>:: +--output-format=<fmt>:: + Set the reporting format to 'normal', 'json' or 'binary'. Only one + output format can be used at a time. + +-v:: +--verbose:: + Increase the information detail in the output. + +EXAMPLES +-------- +* Print the Predictable latency per NVM set log page in a human readable format: ++ +------------ +# nvme predictable-lat-log /dev/nvme0 +------------ ++ + +* Print the raw Predictable latency per NVM set log to a file: ++ +------------ +# nvme predictable-lat-log /dev/nvme0 --raw-binary > nvmset_log.raw +------------ ++ +It is probably a bad idea to not redirect stdout when using this mode. + +NVME +---- +Part of the nvme-user suite |