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authorBeth Flanagan <elizabeth.flanagan@intel.com>2011-08-03 12:31:08 -0700
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-08-05 17:15:59 +0100
commitb525fc13063a6d681a14c871580efaab458dd370 (patch)
treea1d3f303afd07053032f65ca2e2d62a9e6df6ebb /meta/recipes-devtools/autoconf/autoconf.inc
parent17e8d8558dbabe2540860ecf1232214dfdf90ff0 (diff)
downloadpoky-b525fc13063a6d681a14c871580efaab458dd370.tar.gz
buildstats.bbclass: Adding disk io measurement
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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