powerpc/dpaa_1588: optimization for 1588 performance

In case of overloading the slaves, the performace will get worse
since there are more and more outdated timestamps accumulated in
Tx buffer, so we introduce a way to remove those older timestamps
between the current matched one and the tail if they are more than
TS_ACCUMULATION_THRESHOLD. In addition, we update the buffer size
to 256 which is enough according to stress tests.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Change-Id: I761dcabf71f27d47627ca835daf28562bfa37319
Reviewed-on: http://git.am.freescale.net:8181/1146
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>

0 files changed, 0 insertions, 0 deletions