Brian Behlendorf 0b1401ee91 Add visibility in to txg sync behavior ... This change is an attempt to add visibility in to how txgs are being formed on a system, in real time. To do this, a list was added to the in memory SPA data structure for a pool, with each element on the list corresponding to txg. These entries are then exported through the kstat interface, which can then be interpreted in userspace. For each txg, the following information is exported: * Unique txg number (uint64_t) * The time the txd was born (hrtime_t) (*not* wall clock time; relative to the other entries on the list) * The current txg state ((O)pen/(Q)uiescing/(S)yncing/(C)ommitted) * The number of reserved bytes for the txg (uint64_t) * The number of bytes read during the txg (uint64_t) * The number of bytes written during the txg (uint64_t) * The number of read operations during the txg (uint64_t) * The number of write operations during the txg (uint64_t) * The time the txg was closed (hrtime_t) * The time the txg was quiesced (hrtime_t) * The time the txg was synced (hrtime_t) Note that while the raw kstat now stores relative hrtimes for the open, quiesce, and sync times. Those relative times are used to calculate how long each state took and these deltas and printed by output handlers. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>		2013-10-25 13:57:25 -07:00
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avl	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
nvpair	Illumos #3464	2013-09-04 16:01:24 -07:00
unicode	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
zcommon	Illumos #2882, #2883, #2900	2013-09-04 15:49:00 -07:00
zfs	Add visibility in to txg sync behavior	2013-10-25 13:57:25 -07:00
zpios	Illumos #3464	2013-09-04 16:01:24 -07:00
.gitignore	gitignore: anchor entries at their respective directory	2013-04-02 10:50:17 -07:00
Makefile.in	Add KMODDIR to install target	2013-03-06 15:46:40 -08:00