This patchset adds a new "PMD cyclecount" test mode for test-crypto-perf
application. This mode is intended to measure hardware acceleration
cost (in terms of cycle count) more accurately than throughput test.
The general idea is the following:
- Measure build-alloc-free cycle separately
- Alloc and build ops
- Measure completely filling up the TX ring
- Wait until ops are processed
- Measure completely draining the RX ring
- Free all allocated ops
In order to make measurements more accurate, the enqueue/dequeue is
still done in bursts of specified size, but all of the bursts are now
part of a "superburst" of size equal to number of descriptors
configured for the device. So, if the number of descriptors configured
was 2048 (the default), then 2048 ops will be enqueued and dequeued,
in bursts of size specified by test command line.
The following command-line switch will run the test:
--ptest=pmd-cyclecount
In addition to a new mode, two mode command line switches are added:
- --desc-nb - configure number of cryptodev descriptors. This value was
previously hardcoded to 2048, but is now configurable and set
to 2048 by default (so existing behavior is unchanged).
- --pmd-cyclecount-delay-ms - pmd-cyclecount-specific parameter that
configures the delay (in milliseconds) between TX and RX
superbursts, to allow hardware to process ops. Set to 0 by
default, and it is expected that each user will tune it for
every device. This has no effect on other benchmark modes.
PMD cyclecount mode can be used to benchmark software cryptodev drivers
as well, but the results will be far less accurate for smaller burst
sizes.
v2: squashed documentation patches into relevant commits
fixed documentation
fixed commit messages
formatting and naming fixes
Anatoly Burakov (2):
app/crypto-perf: add nb-desc parameter
app/crypto-perf: add new PMD benchmarking mode
app/test-crypto-perf/Makefile | 1 +
app/test-crypto-perf/cperf_options.h | 10 +-
app/test-crypto-perf/cperf_options_parsing.c | 54 ++
app/test-crypto-perf/cperf_test_pmd_cyclecount.c | 675 +++++++++++++++++++++++
app/test-crypto-perf/cperf_test_pmd_cyclecount.h | 61 ++
app/test-crypto-perf/main.c | 11 +-
doc/guides/rel_notes/release_17_11.rst | 6 +
doc/guides/tools/cryptoperf.rst | 14 +-
8 files changed, 828 insertions(+), 4 deletions(-)
create mode 100644 app/test-crypto-perf/cperf_test_pmd_cyclecount.c
create mode 100644 app/test-crypto-perf/cperf_test_pmd_cyclecount.h
--
2.7.4
