Add statistics on SCSI cmd execution. Reads and writes are counted separately.
Total transfer in sectors and total number of commands are accummulated.
Number of commands submitted for execution to backing-store are counted
separately from the number of commands completed. This may provide some clues
on the i/o queues length, as well as some debugging information.
Stat info is requested using a new --op stat applicable to various modes.
When relevant, iscsi conn statistics (currently existing counters) is shown.
Alexander Nezhinsky (2):
Add infrastructure for statistics on SCSI device level
Show new statistics in various modes; integrate scsi and iscsi stats
where relevant
usr/driver.h | 1 +
usr/iscsi/iscsid.c | 1 +
usr/iscsi/iscsid.h | 2 +
usr/iscsi/iser.c | 1 +
usr/iscsi/target.c | 165 ++++++++++++++++++++++++++++++++++++++++++----------
usr/mgmt.c | 64 ++++++++++++++++++++
usr/scsi.c | 16 +++++-
usr/target.c | 164 +++++++++++++++++++++++++++++++++++++++++++++-------
usr/tgtadm.c | 7 ++-
usr/tgtadm.h | 2 +-
usr/tgtd.h | 36 +++++++++++-
11 files changed, 403 insertions(+), 56 deletions(-)
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