Re: [PATCH v4 3/3] samples/bpf: add lpm-trie benchmark
From: Alexei Starovoitov <hidden>
Date: 2017-01-22 23:02:11
On Sat, Jan 21, 2017 at 05:26:13PM +0100, Daniel Mack wrote:
From: David Herrmann <redacted>
Extend the map_perf_test_{user,kern}.c infrastructure to stress test
lpm-trie lookups. We hook into the kprobe on sys_gettid() and measure
the latency depending on trie size and lookup count.
On my Intel Haswell i7-6400U, a single gettid() syscall with an empty
bpf program takes roughly 6.5us on my system. Lookups in empty tries
take ~1.8us on first try, ~0.9us on retries. Lookups in tries with 8192
entries take ~7.1us (on the first _and_ any subsequent try).
Signed-off-by: David Herrmann <redacted>
Reviewed-by: Daniel Mack <daniel@zonque.org>Acked-by: Alexei Starovoitov <ast@kernel.org> Thank you for all the hard work you've put into these patches. All looks great to me.