kernel_optimize_test/arch/sparc
Sowmini Varadhan f1600e549b sparc: Make sparc64 use scalable lib/iommu-common.c functions
In iperf experiments running linux as the Tx side (TCP client) with
10 threads results in a severe performance drop when TSO is disabled,
indicating a weakness in the software that can be avoided by using
the scalable IOMMU arena DMA allocation.

Baseline numbers before this patch:
   with default settings (TSO enabled) :    9-9.5 Gbps
   Disable TSO using ethtool- drops badly:  2-3 Gbps.

After this patch, iperf client with 10 threads, can give a
throughput of at least 8.5 Gbps, even when TSO is disabled.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-16 12:44:56 -07:00
..
boot
configs
crypto crypto: sparc64/md5 - fix module description 2015-01-13 22:30:48 +11:00
include sparc: Make sparc64 use scalable lib/iommu-common.c functions 2015-04-16 12:44:56 -07:00
kernel sparc: Make sparc64 use scalable lib/iommu-common.c functions 2015-04-16 12:44:56 -07:00
lib sparc64: Fix several bugs in memmove(). 2015-03-23 09:22:10 -07:00
math-emu
mm sparc: Fix /proc/kcore 2015-03-18 19:15:28 -07:00
net module: remove mod arg from module_free, rename module_memfree(). 2015-01-20 11:38:33 +10:30
oprofile
power Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-10-11 20:36:34 -04:00
prom sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
Kbuild
Kconfig sparc: expose number of page table levels 2015-04-14 16:49:02 -07:00
Kconfig.debug
Makefile