mbox series

[0/2,v3] xfs: improve transaction rate scalability

Message ID 20200519222310.2576434-1-david@fromorbit.com (mailing list archive)
Headers show
Series xfs: improve transaction rate scalability | expand

Message

Dave Chinner May 19, 2020, 10:23 p.m. UTC 
Hi folks,

This is the third version of the patchset to improve the transaction
rate on higher CPU count machines. The previous versions can be found
here:

https://lore.kernel.org/linux-xfs/20200512025949.1807131-1-david@fromorbit.com/
https://lore.kernel.org/linux-xfs/20200512092811.1846252-1-david@fromorbit.com/

Changes for v3 are:
- completely reorganise the struct xfs_mount, not just a subset of
  the variables. This seems to improve performance even more than
  the original version. (Christoph requested this.)
- remove the m_active_trans counter rather than convert it to percpu
  as Darrick suggested.

Results are just as good or better than previous versions, passes
fstests without regressions on both low PCU count and high CPU count
test VMs.

Cheers,

Dave.