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This commit adds disk-io statistics functionality on a build
and per-task basis.
It pulls measurements for whatever partition TMPDIR exists on.
This data could be off if SSTATE_DIR and DL_DIR exist on
a different partition/volume.
Notes on what this pulls:
ReadsComp: Total number of reads complete
ReadsMerged: Total number of adjacent reads merged
SectRead: Total number of sectors read
TimeReads: Total number of m/s spent reading
WritesComp: Total number of writes completed
SectWrite: Total number of sectors written
TimeWrite: Total number of m/s spent writing
IOinProgress: Total amount of IO in progress at the time of
we look at /proc/diskstats.
TimeIO: Total number of m/s spent doing IO
WTimeIO: Weighted time doing I/O. From iostats.txt:
"This field is incremented at each I/O start, I/O completion, I/O
merge, or read of these stats by the number of I/Os in progress
(field 9) times the number of milliseconds spent doing I/O since the
last update of this field. This can provide an easy measure of both
I/O completion time and the backlog that may be accumulating."
(From OE-Core rev: eeebcebf0d695358e72f3aed753f66cddd5e0e61)
Signed-off-by: Beth Flanagan <elizabeth.flanagan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Instead of using subprocess which is problematic, we should use platform
instead.
Signed-off-by: Beth Flanagan <elizabeth.flanagan@intel.com>
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Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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breaking runqueue somehow
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Used to track some basic build metrics by build and task/event level.
Signed-off-by: Beth Flanagan <elizabeth.flanagan@intel.com>
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