I'm not sure it will help you at those levels, but have you tried boom?
https://github.com/rakyll/boom
On 06/08/2016 19:03, Eugene Grosbein wrote:
Hi!
Is there any high performance benchmark acting as http client for
outer http server
capable to receive 40Gbps without overwhelming CPU with insane number
of syscalls?
I've tried benchmarks/wrk version 4.0.2 and it works just fine upto
20Gbps
for my hardware: two 6-core (HT disabled) Intel(R) Xeon(R) CPU E5-2620
v3 @ 2.40GHz
with two dual-port ix(4) 82599ES 10-Gigabit SFI/SFP+ Network Connection
combined to single lagg interface (lagghash l4).
But each worker pthread of wrk generates too many kqueue() system calls
polling for incoming data and eats 100% of its CPU core and cannot
receive more.
Or, it may be some kqueue() kernel level lock contention, I do not know.
More worker threads, more overloaded CPU cores, no increase of
transfer over about 20Gbps.
I transfer 1MByte-sized files for the benchmark (tried 8MB-sized too).
I set sysctl net.inet.tcp.recvspace=4194304 (4MB).
I've even patched wrk to to use read buffer sized 4MB instead of its
compiled-in
default 8k, as it does not change default socket options other than
TCP_NODELAY:
--- src/wrk.h.orig 2016-08-06 23:20:16.205906000 +0700
+++ src/wrk.h 2016-08-06 23:20:20.460579000 +0700
@@ -18,7 +18,7 @@
#include "ae.h"
#include "http_parser.h"
-#define RECVBUF 8192
+#define RECVBUF 4194304
#define MAX_THREAD_RATE_S 10000000
#define SOCKET_TIMEOUT_MS 2000
Nothing helps to decrease consumed system time and ktrace(1) assures
that's because of kevent() calls.
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