tehnerd

ps -o pid,pcpu,cputime,lwp,wchan,psr,state,comm,maj_flt,min_flt -T -p

tehnerd

input:
tehnerd@nuke:~/projects/katran$ tcpdump -vnnr /tmp/kat_test
reading from file /tmp/kat_test, link-type EN10MB (Ethernet)
22:59:54.219198 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 43)
    192.168.1.1.31337 > 10.211.1.1.80: UDP, length 15
23:00:13.319816 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto TCP (6), length 55)
    192.168.1.1.31337 > 10.211.2.2.80: Flags [S], cksum 0x26e6 (correct), seq 0:15, win 8192, length 15: HTTP
23:01:06.842729 IP6 (hlim 64, next-header TCP (6) payload length: 35) fc00:2::1.31337 > fc00:2::11.80: Flags [.], cksum 0xfd3e (correct), seq 0:15, ack 0, win 8192, length 15: HTTP
23:01:37.319211 IP6 (hlim 64, next-header UDP (17) payload length: 23) fc00:2::1.31337 > fc00:2::33:11.80: [udp sum ok] UDP, length 15
tehnerd@nuke:~/projects/katran$

tehnerd

tehnerd@nuke:~/katran/build/katran/lib$ ./maglev_integration_test -nreals 5041 -weight 1
min freq is 13 max freq is 14
p95 w: 13
p75 w: 13
p50 w: 13
p25 w: 13
p5 w: 13
changes for affected real: 13; and for not affected 96 this is: 0.146482%
tehnerd@nuke:~/katran/build/katran/lib$ ./maglev_integration_test -nreals 5041 -weight 13
min freq is 13 max freq is 14

tehnerd

diff --git a/katran/lib/CMakeLists.txt b/katran/lib/CMakeLists.txt
index cd11504..6a86f24 100644
--- a/katran/lib/CMakeLists.txt
+++ b/katran/lib/CMakeLists.txt
@@ -9,11 +9,12 @@ set(CMAKE_CXX_COMPILER_ID "Clang")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-sign-compare -Wno-bool-compare")

tehnerd

diff --git a/katran/lib/KatranLb.cpp b/katran/lib/KatranLb.cpp
index 2b7e0c6..e09e6fd 100644
--- a/katran/lib/KatranLb.cpp
+++ b/katran/lib/KatranLb.cpp
@@ -685,7 +685,9 @@ lb_stats KatranLb::getIcmpTooBigStats() {

 lb_stats KatranLb::getLbStats(uint32_t position) {
   unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
-  lb_stats stats[nr_cpus];
+  lb_stats stats[nr_cpus<<1];

tehnerd

to run:

compile:  nvcc -o ./siphash_col ./siphash_collision.cu -O3 -std=c++11
run:
time ./siphash_col
...
hash : 12260507120865799508 collided hash 15883040871881799508
mod_hash: 1799508 mod_coll_hash: 1799508
index 3799705340
hash : 12260507120865799508 collided hash 4453885830073799508

tehnerd

trace.py -I net/sock.h 'tcp_mtup_init(struct sock* sk) "family: %u", sk->sk_family' | head
PID     TID     COMM            FUNC             -
0       0       swapper/19      tcp_mtup_init    family: 10
0       0       swapper/19      tcp_mtup_init    family: 10
0       0       swapper/19      tcp_mtup_init    family: 10
0       0       swapper/20      tcp_mtup_init    family: 10
0       0       swapper/20      tcp_mtup_init    family: 10
0       0       swapper/17      tcp_mtup_init    family: 2

tehnerd

tehnerd@ubuntu18:~/katran$ bazel test katran/lib/tests/...
INFO: Analyzed 3 targets (0 packages loaded, 0 targets configured).
INFO: Found 3 test targets...
INFO: Elapsed time: 25.338s, Critical Path: 17.21s
INFO: 9 processes: 9 linux-sandbox.
INFO: Build completed successfully, 10 total actions
//katran/lib/tests:libkatran-tests                              (cached) PASSED in 0.6s
//katran/lib/tests:chhelpers-tests                                       PASSED in 0.3s
//katran/lib/tests:iphelpers-tests                                       PASSED in 0.2s

tehnerd

See also, http://libraryofalexandria.io/cgo/

Using Go cgo

cgo has a lot of trap.
but Not "C" pkg also directory in $GOROOT/src. IDE's(vim) Goto command not works.

So, Here collect materials.

tehnerd

clang-format from clang-8.0.0 w/ default params

tehnerd@devubuntu:~/katran/katran/lib$ ../../deps/clang/clang+llvm-8.0.0-x86_64-linux-gnu-ubuntu-18.04/bin/clang-format -i KatranLb.cpp

on top of 

Author: udippant <udippant@gmail.com>
Date:   Fri Aug 9 15:15:47 2019 -0700