standard sysfs interface. I don't think it makes much sense to
display the offset values as part of the output of "sensors" (it
would even probably confuse people) but having support for these
in libsensors makes it possible to adjust the offsets in
sensors.conf, which is convenient.
This closes ticket #2248.
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to add more "standard" feature types such as current or power,
we want to give them numbers that immediately follow the fan, voltage
and temperature features, so that the code is as simple as possible.
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* We don't need to compute the mapping during the first pass: this
field is overwritten when renumbering the features anyway.
* Only main features have features mapping to them.
* Only subfeatures have mappings, so we can stop the scan at the next
main feature.
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from its type, there's no need to store this scaling factor. We can
instead compute it at runtime. This saves some memory (about 10 kB
in my real-world test), and the runtime overhead is totally
negligible.
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idea is to have separate indexing for subfeatures with a compute
mapping and for subfeatures without it. They still follow each
other in the big table but this avoids wasting memory due to the
numbering gap between them.
This cuts the amount of memory (temporarily) allocated by
sensors_read_dynamic_chip() almost by half, and also speeds it up
a little as it now takes less iterations to walk the sparse array.
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position N in the array. This allows for O(1) look-ups, as opposed
to O(N) before. This makes sensors_lookup_feature_nr() 2.4 times
faster in my real-world tests, resulting in a 6% performance boost
on average in the runtime part of "sensors".
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feature number as the logical mapping. This means that the compute
mapping can be turned into a simple boolean flag. Doing so makes
struct sensors_feature_data smaller, which saves some memory (about
17 kB in my tests.)
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we need to add "_input" to get the correct sysfs file name. This is
much faster. This is still a ugly hack I'd like to get rid of, but at
least now the slowdown is acceptable.
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sensors_bus_id. This prevents wasting space with padding on 64-bit
systems, saving some memory (128 bytes for sensors_bus_id, nothing
yet for sensors_feature_data but it will come later).
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MAX_SUB_FEATURES in the process.) This value could change in the
future so it's not safe to make it part of the libsensors API.
And it isn't needed either, applications shouldn't need to use
this value.
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caller select which subset of chips it wants. This is slightly better
size-wise than letting all applications do the filtering by themselves.
This will change the way the command line parameters of "sensors" are
interpreted. Beforehand, the chips were always returned in the order
in which they were listed by the library. Also, each chip could be listed
only once. From now on, the chips will be listed in the order in which
they are passed on the command line, which I think makes more sense. A
side effect is that chips can be listed more than once, if that's what
the user asks for. Not very useful though.
This change makes it possible to make sensors_match_chip() internal
to the library. Filtering the list of chips returned by
sensors_get_detected_chips() was the last known external use for this
function.
This patch looks much bigger than it really is, but the largest part is
really only code reindentation.
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Instead, the application will have to call sensors_exit() explicitly
before calling sensors_init() again. Most applications don't offer
any way to reload the configuration file, so better optimize for the
initial load.
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SPI bus statements in the configuration file are not yet supported, as
SPI buses don't have a name attribute yet, it's not possible to identify
them and thus no substitution is possible.
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i2c-centric. Make it more neutral so that we can cleanly support
additional bus types such as SPI or One-Wire.
This second part updates sensors_bus to use sensors_bus_id. Thanks
to Mark M. Hoffman for showing me how the configuration file
parser could be modified to support that change.
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i2c-centric. Make it more neutral so that we can cleanly support
additional bus types such as SPI or One-Wire.
This first part introduces sensors_bus_id, and updates
sensors_chip_name to use it.
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rewrite sensors_parse_chip_name() with a simpler algorithm. The new
code is smaller by about one third, and twice as fast on average
(5 times as fast in the most frequent case "foo-*".)
This closes ticket #2221.
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sensors_parse_chip_name(). sensors_snprintf_chip_name() converts
a chip name from its internal representation to a human readable
string. So far, each user program had to reimplement this function.
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Mark M. Hoffman