From c98d8a044308e3cde1de4945dbb7f5ee62ab52a5 Mon Sep 17 00:00:00 2001 From: bnewbold Date: Thu, 2 Jun 2016 21:44:52 -0400 Subject: doc: commit random notes I had sitting around --- doc/cargo_profiler.txt | 13 ++ doc/early_benchmarks.txt | 307 +++++++++++++++++++++++++++++++++++++++++++++++ doc/notes.txt | 44 +++++++ 3 files changed, 364 insertions(+) create mode 100644 doc/cargo_profiler.txt create mode 100644 doc/early_benchmarks.txt create mode 100644 doc/notes.txt (limited to 'doc') diff --git a/doc/cargo_profiler.txt b/doc/cargo_profiler.txt new file mode 100644 index 0000000..783914d --- /dev/null +++ b/doc/cargo_profiler.txt @@ -0,0 +1,13 @@ +bnewbold@eschaton$ cargo profiler callgrind --bin target/debug/ucp -- /tmp/dummy localhost:dummy --no-crypto + +Profiling ucp with callgrind... + +Total Instructions...10,403,177,656 + +2,204,020,815 (21.2%) socket.rs:socket::UtpSocket::recv +----------------------------------------------------------------------- +2,159,914,683 (20.8%) socket.rs:socket::UtpSocket::send_packet +----------------------------------------------------------------------- +936,415,826 (9.0%) ???:__GI_memset +----------------------------------------------------------------------- +[...] diff --git a/doc/early_benchmarks.txt b/doc/early_benchmarks.txt new file mode 100644 index 0000000..98a754e --- /dev/null +++ b/doc/early_benchmarks.txt @@ -0,0 +1,307 @@ + +# Early Testing, May 30, 2016 (commit ccd871880d) + +Below are some results from early benchmarking of various simple UDP and TCP +transfer tools. + +bnewbold@eschaton$ ls -lathr /tmp/dummy +-rw-r--r-- 1 bnewbold bnewbold 256M May 30 16:27 /tmp/dummy + +### SCP + +bnewbold@eschaton$ time scp /tmp/dummy localhost:dummy +real 0m1.972s +user 0m1.488s +sys 0m0.464s + +% time seconds usecs/call calls errors syscall +------ ----------- ----------- --------- --------- ---------------- + 39.88 0.001033 1033 1 wait4 + 37.99 0.000984 0 16311 poll + 13.13 0.000340 0 32701 16311 write + 8.07 0.000209 0 16394 read + 0.93 0.000024 2 12 mprotect + 0.00 0.000000 0 12 open + 0.00 0.000000 0 20 close + 0.00 0.000000 0 12 fstat + 0.00 0.000000 0 2 lseek + 0.00 0.000000 0 22 mmap + 0.00 0.000000 0 5 munmap + 0.00 0.000000 0 3 brk + 0.00 0.000000 0 19 rt_sigaction + 0.00 0.000000 0 1 rt_sigreturn + 0.00 0.000000 0 5 ioctl + 0.00 0.000000 0 7 7 access + 0.00 0.000000 0 3 pipe + 0.00 0.000000 0 3 alarm + 0.00 0.000000 0 2 socket + 0.00 0.000000 0 2 2 connect + 0.00 0.000000 0 1 clone + 0.00 0.000000 0 1 execve + 0.00 0.000000 0 6 fcntl + 0.00 0.000000 0 1 getuid + 0.00 0.000000 0 3 getpgrp + 0.00 0.000000 0 1 arch_prctl + 0.00 0.000000 0 4 clock_gettime +------ ----------- ----------- --------- --------- ---------------- +100.00 0.002590 65554 16320 total + +### UCP (with crypto) + +bnewbold@eschaton$ time ./ucp /tmp/dummy localhost:dummy +real 1m9.058s +user 1m0.036s +sys 0m2.276s + +% time seconds usecs/call calls errors syscall +------ ----------- ----------- --------- --------- ---------------- + 93.39 0.012000 12000 1 wait4 + 3.57 0.000459 0 262153 sendto + 2.32 0.000298 0 262152 recvfrom + 0.37 0.000048 0 65549 read + 0.35 0.000045 0 262152 setsockopt + 0.00 0.000000 0 15 write + 0.00 0.000000 0 11 open + 0.00 0.000000 0 18 close + 0.00 0.000000 0 10 fstat + 0.00 0.000000 0 30 mmap + 0.00 0.000000 0 16 mprotect + 0.00 0.000000 0 6 munmap + 0.00 0.000000 0 2 brk + 0.00 0.000000 0 5 rt_sigaction + 0.00 0.000000 0 1 rt_sigprocmask + 0.00 0.000000 0 1 ioctl + 0.00 0.000000 0 9 9 access + 0.00 0.000000 0 26 madvise + 0.00 0.000000 0 1 socket + 0.00 0.000000 0 1 bind + 0.00 0.000000 0 3 clone + 0.00 0.000000 0 1 execve + 0.00 0.000000 0 1 1 readlink + 0.00 0.000000 0 2 getrlimit + 0.00 0.000000 0 3 sigaltstack + 0.00 0.000000 0 1 arch_prctl + 0.00 0.000000 0 1 futex + 0.00 0.000000 0 1 sched_getaffinity + 0.00 0.000000 0 1 set_tid_address + 0.00 0.000000 0 1 set_robust_list + 0.00 0.000000 0 4 pipe2 + 0.00 0.000000 0 7 getrandom +------ ----------- ----------- --------- --------- ---------------- +100.00 0.012850 852185 10 total + +### UCP (w/o crypto) + +bnewbold@eschaton$ time ./ucp /tmp/dummy localhost:dummy --no-crypto +real 0m12.405s +user 0m9.412s +sys 0m1.368s + +% time seconds usecs/call calls errors syscall +------ ----------- ----------- --------- --------- ---------------- + 68.17 0.001328 0 196620 sendto + 14.63 0.000285 0 196615 setsockopt + 9.80 0.000191 0 196615 2 recvfrom + 7.39 0.000144 0 65549 read + 0.00 0.000000 0 15 write + 0.00 0.000000 0 11 open + 0.00 0.000000 0 18 close + 0.00 0.000000 0 10 fstat + 0.00 0.000000 0 30 mmap + 0.00 0.000000 0 16 mprotect + 0.00 0.000000 0 6 munmap + 0.00 0.000000 0 2 brk + 0.00 0.000000 0 5 rt_sigaction + 0.00 0.000000 0 1 rt_sigprocmask + 0.00 0.000000 0 1 ioctl + 0.00 0.000000 0 9 9 access + 0.00 0.000000 0 20 madvise + 0.00 0.000000 0 1 socket + 0.00 0.000000 0 1 bind + 0.00 0.000000 0 3 clone + 0.00 0.000000 0 1 execve + 0.00 0.000000 0 1 wait4 + 0.00 0.000000 0 1 1 readlink + 0.00 0.000000 0 2 getrlimit + 0.00 0.000000 0 3 sigaltstack + 0.00 0.000000 0 1 arch_prctl + 0.00 0.000000 0 2 futex + 0.00 0.000000 0 1 sched_getaffinity + 0.00 0.000000 0 1 set_tid_address + 0.00 0.000000 0 1 set_robust_list + 0.00 0.000000 0 4 pipe2 + 0.00 0.000000 0 4 getrandom +------ ----------- ----------- --------- --------- ---------------- +100.00 0.001948 655570 12 total + +### UCP (w/o crypto, temp_utp) + +bnewbold@eschaton$ time ./ucp /tmp/dummy localhost:dummy --no-crypto +real 0m11.234s +user 0m7.420s +sys 0m1.372s + +### CP + +bnewbold@eschaton$ time cp /tmp/dummy localhost:dummy +real 0m0.270s +user 0m0.004s +sys 0m0.244s + +% time seconds usecs/call calls errors syscall +------ ----------- ----------- --------- --------- ---------------- + 85.76 0.076000 2815 27 1 open + 7.16 0.006347 219 29 close + 6.49 0.005755 3 2048 write + 0.56 0.000493 0 2060 read + 0.02 0.000021 1 39 mmap + 0.00 0.000000 0 3 stat + 0.00 0.000000 0 26 fstat + 0.00 0.000000 0 1 1 lseek + 0.00 0.000000 0 16 mprotect + 0.00 0.000000 0 4 munmap + 0.00 0.000000 0 3 brk + 0.00 0.000000 0 2 rt_sigaction + 0.00 0.000000 0 1 rt_sigprocmask + 0.00 0.000000 0 10 10 access + 0.00 0.000000 0 1 execve + 0.00 0.000000 0 1 getrlimit + 0.00 0.000000 0 1 geteuid + 0.00 0.000000 0 2 2 statfs + 0.00 0.000000 0 1 arch_prctl + 0.00 0.000000 0 1 1 mount + 0.00 0.000000 0 1 futex + 0.00 0.000000 0 1 set_tid_address + 0.00 0.000000 0 1 fadvise64 + 0.00 0.000000 0 1 set_robust_list +------ ----------- ----------- --------- --------- ---------------- +100.00 0.088616 4280 15 total + +### UDT sendfile/recvfile + +Seems to be multi-threaded. + +"speed = 463.584Mbits/sec" +(with strace: speed = 257.154Mbits/sec) + +bnewbold@eschaton$ time ./recvfile 127.0.0.1 54321 /tmp/dummy d +real 0m4.855s +user 0m0.196s +sys 0m0.980 + +% time seconds usecs/call calls errors syscall +------ ----------- ----------- --------- --------- ---------------- + 89.02 5.733621 2158 2657 402 futex + 8.88 0.572045 3 187218 2008 recvmsg + 1.12 0.072000 9000 8 open + 0.91 0.058644 0 184365 writev + 0.06 0.004000 444 9 close + 0.00 0.000283 0 817 nanosleep + 0.00 0.000080 0 3246 sendmsg + 0.00 0.000030 0 207 mprotect + 0.00 0.000000 0 6 read + 0.00 0.000000 0 1 write + 0.00 0.000000 0 7 fstat + 0.00 0.000000 0 1 lseek + 0.00 0.000000 0 27 mmap + 0.00 0.000000 0 4 munmap + 0.00 0.000000 0 7 brk + 0.00 0.000000 0 2 rt_sigaction + 0.00 0.000000 0 1 rt_sigprocmask + 0.00 0.000000 0 8 8 access + 0.00 0.000000 0 3 madvise + 0.00 0.000000 0 1 socket + 0.00 0.000000 0 1 bind + 0.00 0.000000 0 2 getsockname + 0.00 0.000000 0 3 setsockopt + 0.00 0.000000 0 3 clone + 0.00 0.000000 0 1 execve + 0.00 0.000000 0 1 getrlimit + 0.00 0.000000 0 1 arch_prctl + 0.00 0.000000 0 1 set_tid_address + 0.00 0.000000 0 4 set_robust_list +------ ----------- ----------- --------- --------- ---------------- +100.00 6.440703 378612 2418 total + +### libutp demo program + +this one is a hack... + +bnewbold@eschaton$ time (cat /tmp/dummy | ./ucat-static 127.0.0.1 54321) +real 0m7.439s +user 0m0.912s +sys 0m2.492s + +% time seconds usecs/call calls errors syscall +------ ----------- ----------- --------- --------- ---------------- + 56.45 0.002220 0 196609 sendto + 19.48 0.000766 0 371844 poll + 15.69 0.000617 0 255497 60502 recvfrom + 8.39 0.000330 0 65542 read + 0.00 0.000000 0 7 open + 0.00 0.000000 0 7 close + 0.00 0.000000 0 7 fstat + 0.00 0.000000 0 22 mmap + 0.00 0.000000 0 12 mprotect + 0.00 0.000000 0 1 munmap + 0.00 0.000000 0 3 brk + 0.00 0.000000 0 3 rt_sigaction + 0.00 0.000000 0 1 rt_sigprocmask + 0.00 0.000000 0 8 8 access + 0.00 0.000000 0 1 socket + 0.00 0.000000 0 1 bind + 0.00 0.000000 0 1 getsockname + 0.00 0.000000 0 1 setsockopt + 0.00 0.000000 0 1 execve + 0.00 0.000000 0 1 getrlimit + 0.00 0.000000 0 1 arch_prctl + 0.00 0.000000 0 1 set_tid_address + 0.00 0.000000 0 1 set_robust_list +------ ----------- ----------- --------- --------- ---------------- +100.00 0.003933 889572 60510 total + +### NC (TCP) + +bnewbold@eschaton$ time nc 127.0.0.1 54321 < /tmp/dummy +real 0m2.050s +user 0m0.008s +sys 0m0.392s + +### SCP remote (adelie to nsa) + +Goes from ~3MB/sec to ~10MB/sec of throughput. + +bnewbold@adelie:~$ time scp /tmp/dummy bnewbold.the-nsa.org: +real 0m34.858s +user 0m3.073s +sys 0m0.903s + + +### UTP remote (adelie to nsa) + +ugh, *so* slow! + +bnewbold@adelie:~/src/libutp$ time ./ucat-static bnewbold.the-nsa.org 54321 < /tmp/dummy +real 3m57.462s +user 0m1.787s +sys 0m4.690s + +### UDT remote (adelie to nsa) + +bnewbold@bnewbold:~/src/git/udt4$ time ./app/recvfile adelie.robocracy.org 54321 /tmp/dummy ~/dummy +real 0m12.068s +user 0m0.140s +sys 0m1.060s + +### BBCP remote (adelie to nsa) + +bnewbold@adelie:~/src/bbcp$ time ./bin/amd64_linux/bbcp /tmp/dummy bnewbold.the-nsa.org:dummy +real 1m45.054s +user 0m0.037s +sys 0m0.370s + +bnewbold@adelie:~/src/bbcp$ time ./bin/amd64_linux/bbcp -P 2 -w 2M -s 10 /tmp/dummy bnewbold.the-nsa.org:dummy +real 0m18.942s +user 0m0.017s +sys 0m0.337s + diff --git a/doc/notes.txt b/doc/notes.txt new file mode 100644 index 0000000..491d30f --- /dev/null +++ b/doc/notes.txt @@ -0,0 +1,44 @@ + +On loopback network device, mtu is 65kb! +Not 1500bytes, which is what wlan0 and eth0 have. + +scp seems to use ~16kbytes per "block" +cp (disk-to-disk) is ~125kbytes per "block" + +wonder if scp is doing anything fancy with local domain sockets. + +ucp uses 4kb "blocks" to read from disk. + +utp is sending ~1.3kbyte messages (tiny), even over loopback + +looks like a reasonably large amount of time is being spent zeroing buffers: + + 920,293,418 ???:__GI_memset [/lib/x86_64-linux-gnu/libc-2.22.so] + +The 'utpcat' library that ships with the utp + +canonical reference on this stuff is: + http://moo.nac.uci.edu/~hjm/HOWTO_move_data.html + +ended up using valgrind/callgrind like: + + valgrind --tool=callgrind ./ucp /tmp/dummy bnewbold@localhost:dummy --no-crypto + callgrind_annotate callgrind.out.18253 --inclusive=yes + # optionally, --tree=both to annotate + +valgrind really slowed things down (like 5x or 10x slower, subjectively?). I +think a tool like kcachegrind might be helpful, though I couldn't try that one +(debian testing woes). + +almost useful tool! rust's `cargo profile` command: + + cargo install cargo-profiler + cargo profiler callgrind --bin target/debug/ucp + +It has much better/easier output, but doesn't allow arguments to the binary +being called (?!?!?). I created a pull request for this. + +QUESTIONS: +- how does scp send network data w/o 'send' or 'sendfile'? Is it using fd + access to tcp socket? +- what is the deal with setsockopt in utp? -- cgit v1.2.3