[stgt] [PATCH 1/2] Add infrastructure for statistics on SCSI device level

Or Gerlitz ogerlitz at mellanox.com
Sun Jul 1 10:21:09 CEST 2012


On 27/06/2012 16:14, FUJITA Tomonori wrote:
> You guys really need this fine granularity. I feel that it's too
> much. Linux kernel doesn't provide such?

Just to further clarify here, the kernel can help only for the "L" part 
of ITL and mostly for luns based on block devices. Where generally, luns 
are many times based on ram based sources (tmpfs, ramfs, etc) or even 
null which is critical when one attempts to measure the performance of 
the SAN (e.g iscsi/iser) protocol part of TGT.

Or.
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