Bug #9082

Add ZFS performance test targeting ZIL latency

Added by John Kennedy 12 months ago. Updated 7 months ago.

Status:ClosedStart date:2018-02-08
Priority:NormalDue date:
Assignee:John Kennedy% Done:


Target version:-
Difficulty:Medium Tags:needs-triage


Work by Prakash Surya.

This adds a new test to measure ZIL performance.

- A new DTrace collection script to measure latency, and another to collect stacks of threads scheduled off a cpu for creation of flamegraphs.
- Enhances the io.d collection script to produce histograms
- Adds the ability to induce IO delays with zinject
- Adds a new variable (PERF_NTHREADS_PER_FS) to allow fio threads to be distributed to individual file systems as opposed to all IO going to one, as happens elsewhere.
- Refactoring of do_fio_run


#1 Updated by Electric Monk 7 months ago

  • % Done changed from 0 to 100
  • Status changed from New to Closed

git commit c373aa8be7dba4bca17e8db696f27412617604b9

commit  c373aa8be7dba4bca17e8db696f27412617604b9
Author: John Wren Kennedy <john.kennedy@delphix.com>
Date:   2018-06-18T17:32:39.000Z

    9082 Add ZFS performance test targeting ZIL latency
    Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
    Reviewed by: Matthew Ahrens <mahrens@delphix.com>
    Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
    Reviewed by: Tony Nguyen <tony.nguyen@delphix.com>
    Approved by: Matt Ahrens <mahrens@delphix.com>

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