diff options
| author | Robin Murphy <[email protected]> | 2017-03-31 15:46:07 +0100 |
|---|---|---|
| committer | Joerg Roedel <[email protected]> | 2017-04-03 12:45:03 +0200 |
| commit | bb65a64c7285e7105c1a6c8a33b37770343a4e96 (patch) | |
| tree | 2efc271de7785fa95fa91c6385c6fa56a76ce7be /scripts/gdb/linux/proc.py | |
| parent | a44e6657585b15eeebf5681bfcc7ce0b002429c2 (diff) | |
iommu/dma: Plumb in the per-CPU IOVA caches
With IOVA allocation suitably tidied up, we are finally free to opt in
to the per-CPU caching mechanism. The caching alone can provide a modest
improvement over walking the rbtree for weedier systems (iperf3 shows
~10% more ethernet throughput on an ARM Juno r1 constrained to a single
650MHz Cortex-A53), but the real gain will be in sidestepping the rbtree
lock contention which larger ARM-based systems with lots of parallel I/O
are starting to feel the pain of.
Reviewed-by: Nate Watterson <[email protected]>
Tested-by: Nate Watterson <[email protected]>
Signed-off-by: Robin Murphy <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
Diffstat (limited to 'scripts/gdb/linux/proc.py')
0 files changed, 0 insertions, 0 deletions