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2013-12-11trafgen: speedup TX only path by avoiding kernel packet_rcv() callJesper Dangaard Brouer1-1/+1
The tool trafgen is used in a pktgen style transmit only scenario. We discovered a performance bottleneck in the kernel, when running trafgen, where the kernel stalled on a lock in packet_rcv(). This call is unnecessary for trafgen given its transmit only nature. This packet_rcv() call can, easily be avoided by instructing the RAW/PF_PACKET socket, to not listen to any protocols (by passing protocol argument zero, when creating the socket). The performance gain is huge, increasing performance from approx max 2Mpps to 12Mpps, basically causing trafgen to scale with the number of CPUs. Following tests were run on a 2xCPU E5-2650 with Intel 10Gbit/s ixgbe: Trafgen using sendto() syscall via parameter -t0: * # CPUs -- *with* -- *without* packet_rcv() call * 1 CPU == 1,232,244 -- 1,236,144 pkts/sec * 2 CPUs == 1,592,720 -- 2,593,620 pkts/sec * 3 CPUs == 1,635,623 -- 3,692,216 pkts/sec * 4 CPUs == 1,567,768 -- 4,102,866 pkts/sec * 5 CPUs == 1,700,270 -- 5,151,489 pkts/sec * 6 CPUs == 1,762,392 -- 6,124,512 pkts/sec * 7 CPUs == 1,850,139 -- 7,120,496 pkts/sec * 8 CPUs == 1,770,909 -- 8,058,710 pkts/sec * 9 CPUs == 1,721,072 -- 8,963,192 pkts/sec * 10 CPUs == 1,359,157 -- 9,584,535 pkts/sec * 11 CPUs == 1,175,520 -- 10,498,038 pkts/sec * 12 CPUs == 1,075,867 -- 11,189,292 pkts/sec * 13 CPUs == 1,012,602 -- 12,048,836 pkts/sec * [...] * 20 CPUs == 1,030,446 -- 11,202,449 pkts/sec Trafgen using mmap() TX tpacket_v2 (default) * # CPUs -- *with* -- *without* packet_rcv() call * 1 CPU == 920,682 -- 927,984 pkts/sec * 2 CPUs == 1,607,940 -- 2,061,406 pkts/sec * 3 CPUs == 1,668,488 -- 2,979,463 pkts/sec * 4 CPUs == 1,423,066 -- 3,169,565 pkts/sec * 5 CPUs == 1,507,708 -- 3,910,756 pkts/sec * 6 CPUs == 1,555,616 -- 4,625,844 pkts/sec * 7 CPUs == 1,560,961 -- 5,298,441 pkts/sec * 8 CPUs == 1,596,092 -- 6,000,465 pkts/sec * 9 CPUs == 1,575,139 -- 6,722,130 pkts/sec * 10 CPUs == 1,311,676 -- 7,114,202 pkts/sec * 11 CPUs == 1,157,650 -- 7,859,399 pkts/sec * 12 CPUs == 1,060,366 -- 8,491,004 pkts/sec * 13 CPUs == 1,012,956 -- 9,269,761 pkts/sec * [...] * 20 CPUs == 955,716 -- 8,653,947 pkts/sec It is fairly strange that the mmap() version runs slower than the sendto() version. This is likely another performance problem related to mmap() which seems worth fixing. Note, that the mmap() version speed can be improved by reducing the default --ring-size to around 1-2 MiB. But this does not fix general trend with mmap() performance. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
2013-11-25trafgen: inherit netsniff-ng's -H -Q optionsDaniel Borkmann1-3/+21
Also make these options available to trafgen. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-11-18trafgen: don't bother about device going down, just continue sendingDaniel Borkmann1-2/+2
If we loose carrier, don't bother about panic'ing, but continue sending! Only exit in case we're doing a smoke test. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-10-15trafgen: set interpacket gap in time units (s/ms/us/ns)Jon Schipp1-11/+39
Add ability to set IGP in time units in seconds, milliseconds, microseconds, and nanoseconds by appending a postfix to --gap e.g. --gap 100ms. Also, update the man page and trafgen.zsh to reflect the changes. [Fix whitespaces, coding style and minor wording changes -- tklauser] Signed-off-by: Jon Schipp <jonschipp@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-09-23trafgen: remove inner loopDaniel Borkmann1-31/+31
Get rid of inner loop in fast path. This simplifies code and readability. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-09-12trafgen: combine likely conditionsDaniel Borkmann1-2/+2
Combine multiple likely conditions into one. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-08-12trafgen: Fix compiler warningsTobias Klauser1-17/+21
Fix the following compiler warnings that occur when building with "-W -Wall -Wextra": trafgen.c: In function ‘timer_elapsed’: trafgen.c:136:31: warning: unused parameter ‘number’ [-Wunused-parameter] trafgen.c: In function ‘apply_csum16’: trafgen.c:346:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘dump_trafgen_snippet’: trafgen.c:415:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘xmit_smoke_probe’: trafgen.c:490:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:506:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:509:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:512:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘__wait_and_sum_others’: trafgen.c:721:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘__correct_global_delta’: trafgen.c:743:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:761:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘xmit_packet_precheck’: trafgen.c:797:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:816:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘main_loop’: trafgen.c:837:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c: In function ‘main’: trafgen.c:1047:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:1065:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:1078:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] trafgen.c:1090:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-08-09mac80211.c: Remove or mark unused function parametersTobias Klauser1-1/+1
Compiling with "-W -Wall -Wextra" reveals the following warnings in mac80211.c: mac80211.c: In function ‘nl80211_init’: mac80211.c:78:67: warning: unused parameter ‘device’ [-Wunused-parameter] mac80211.c: In function ‘nl80211_wait_handler’: mac80211.c:106:48: warning: unused parameter ‘msg’ [-Wunused-parameter] mac80211.c: In function ‘nl80211_error_handler’: mac80211.c:115:54: warning: unused parameter ‘nla’ [-Wunused-parameter] mac80211.c:117:12: warning: unused parameter ‘arg’ [-Wunused-parameter] mac80211.c: In function ‘nl80211_del_mon_if’: mac80211.c:181:72: warning: unused parameter ‘device’ [-Wunused-parameter] Fix them by either marking them as unused (where we need to conform to library APIs or remove them alltogether (for our own APIs). For the function leave_rfmon_mac80211() the according users (netsniff-ng and trafgen) are also changed. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-08-02trafgen: Remove unused local variable in apply_*() functions.Tobias Klauser1-25/+22
The variable `i' in apply_counter(), apply_randomizer() and apply_csum16() is only set once, so use the original parameter `counter_id' instead. Rename `counter_id' to `id' in order to keep it short. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-07-13trafgen: switch for skipping cpu time statistics on exitDaniel Borkmann1-3/+8
For systems with >8 CPUs it might be i) annoying or ii) uninteresting to print CPU time statistics. So introduce a switch that can skip this at exit. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-07-13sparse: netsniff-ng, trafgen: fix remaining time(0) warningsDaniel Borkmann1-1/+1
Those are the last occurences of warnings like: netsniff-ng.c:697:48: warning: Using plain integer as NULL pointer netsniff-ng.c:726:48: warning: Using plain integer as NULL pointer ... Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-07-13trafgen: setup_shared_var: fix reamaindersDaniel Borkmann1-4/+3
Commit bf9232fb6 ("trafgen: setup_shared_var: fix couple of things") forgot to amend the remaining changes in 'len' usage. So lets fix them right now. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-07-13trafgen: sparse: make seed staticDaniel Borkmann1-4/+4
sparse reported that the variable seed can be made static: trafgen.c:110:14: warning: symbol 'seed' was not declared. Should it be static? While at it, also rename a local variable 'seed' to not overlap contexts. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-07-13trafgen: setup_shared_var: fix couple of thingsDaniel Borkmann1-5/+6
1) Fix a couple of sparse warnings: trafgen.c:382:27: error: cannot size expression trafgen.c:391:33: error: cannot size expression trafgen.c:393:33: error: cannot size expression trafgen.c:401:25: error: cannot size expression 2) Use MAP_FAILED instead of (void *) -1 3) No need to cast to void * on mmap(2) 4) Use NULL instead of 0 as mmap(2)'s first argument Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-07-09all: show git id in --version informationDaniel Borkmann1-2/+4
In order to be able to better track regressions or to give support, let us track the Git id as well in version information. This makes the ``--version'' switch actually useful. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-15trafgen: fix checksumming in trafgen example configDaniel Borkmann1-1/+1
Took quite a while to git bisect the cause for the wrong TCP checksum in the -e example. It turned out that commit bf43e1993c7037 ("trafgen: lexer: return original string if no shellcode") "broke" it, since before that commit the TCP checksum from -e example was correct and afterwards not anymore. Well, it didn't break it. What was happening here is that with this fix above, the packet got 1 byte longer since the first character of the example string is not omitted anymore, therefore the checksum got wrong. Fix this by fixing the IP total length of the packet in the -e and man page example. The UDP example from the man page still works well if csumudp() is used, so not affected of this. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-15trafgen: check offsets for all kind of csumsDaniel Borkmann1-2/+5
It seems not critical at this point, but lets check it for all offsets here as well, and mark this check as unlikely to happen. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-15trafgen: fix -n1 bug for packet schedulingDaniel Borkmann1-2/+2
In the current situation, it can happen when we set -n1, that no packet at all will be scheduled. This is due to the case that nearbyint() will for e.g. 2 cpus round to 0 each, and since in __correct_global_delta() we only correct a total delta when a particular CPU is allowed to tx packets (means already has a num > 0), then we correct the delta on the first such CPU. Switch to using round(), so that on 0.5 it will be round to the next higher int, and fix the check to >= 0 in __correct_global_delta() so that a CPU could also get a 0 share of packets. I did a couple of tests with different -n params and cpu(..) configs and this seems to fix that. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xutils: eliminate xutils, move rest to epoll2Daniel Borkmann1-1/+2
Finally eliminate xutils.{c,h} and move the rest to epoll2. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04timer: add time management functionsDaniel Borkmann1-0/+1
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04sig: add signal handling functionsDaniel Borkmann1-0/+1
Add an extra file for signal handling functions. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04sock: add socket management functionsDaniel Borkmann1-0/+1
Remove them from xutils, and add them to socket management. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04proc: move out process specific management functionsDaniel Borkmann1-0/+1
Move them out of xutils, so that we can maintain them separately. Also simplify things a bit. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04privs: move drop_privileges out of xutilsDaniel Borkmann1-0/+1
Again, also to be able to maintain this more easily. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xio: rename xio to ioops and reduce its includesDaniel Borkmann1-1/+1
Rename xio to ioops (io-ops) and boil its include files down to a minimum. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xio: add ioexact operationsDaniel Borkmann1-5/+1
Break this out so that we only need to have sigint non-static where it is really needed. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04cpus: break out cpu related functions from xutilsDaniel Borkmann1-0/+1
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xutils: break out string handling and lockingDaniel Borkmann1-0/+2
Break out all string handling functions and lockme stuff in order to further eliminate the big code blob in xutils, so that it can be easier maintained. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-03irq: break out from xutils and save + restoreDaniel Borkmann1-0/+2
Break out IRQ functionality from xutils, simplify it, and save + restore IRQ affinity list. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-05-31ring: setup frame structure for v2/v3 in a generic wayDaniel Borkmann1-1/+1
Prepare TPACKET_V3 for allowing to transparently setting up the frame structure such that we do not need to change much in the netsniff-ng/trafgen code. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-05-23make: include build nameDaniel Borkmann1-1/+1
Include long version string into tools when called with --version. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-05-21trafgen: Remove unnecessary reinitialization of icmp packetTobias Klauser1-2/+0
The entire packet is zeroed using memset() three lines above, thus there is no need to set icmp->code and icmp->checksum to 0 explicitely again. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-05-17trafgen: Add __noreturn attribute previously missedTobias Klauser1-1/+1
The version() function was missed in the previous commit 785fe152 ("trafgen: Add __noreturn attribute to exiting functions"), so add __noreturn to it now. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-05-17trafgen: Add __noreturn attribute to exiting functionsTobias Klauser1-2/+2
Add the __noreturn attribute to all functions which wont return but call die() themselves to exit(). Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-05-15man: trafgen: Minor fixesTobias Klauser1-1/+1
Replace "on default" by "by default", make it a bit more clear what the seed in the -E/--seed option is for and mention exit after display of information on --version and --help. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-04-09trafgen: do not care if device is running yetDaniel Borkmann1-2/+0
E.g. when executing trafgen on tap devices, trafgen will complain that it is not up and running although it was brought up. Remove this usability restriction and let the kernel decide if it may send the packets or not. Reported-by: Aimal Khan <aimal.khan98@gmail.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-28ring: purge timer before we unmap tx ring buffersDaniel Borkmann1-2/+18
If we unmap TX ring buffers and still have timer shots that trigger the kernel to traverse the TX_RING, it can send out random crap in some situations. Prevent this by destroying the timer and flush the TX_RING first in wait mode. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-26trafgen: update help descriptionDaniel Borkmann1-1/+1
After commit f9591eebe40c (trafgen: lexer/parser: fix cpu() selection and whitespacing), we also need to fixup the help description, so that users start using the cpu(X-Y) notation instead. Also, reintroduce the alias csum16 for csumip. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-22trafgen: fix bug in packet schedulingDaniel Borkmann1-16/+22
When having a config like cpu(1): {...}, and one runs it with -n1, trafgen behaves buggy, I also noted that in other situations. Fix this by letting the loop also return on CPU state RES, and do not perform this stupid magic in the main routine. So far it seems to work now after some basic tests I did. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-16netsniff-ng trafgen: check return value of pull_and_flush_ringDaniel Borkmann1-1/+12
Let us check the return value when the timer triggers a TX flush request to the kernel. However, ignore the case of BADFS and NOBUFS. The socket could already have been closed before the timer triggers in the first case, and in the second, we just let the next timer continue processing if currently the buffer space is exhausted. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-03-15all: import netsniff-ng 0.5.8-rc0 sourceDaniel Borkmann1-0/+1064
We decided to get rid of the old Git history and start a new one for several reasons: *) Allow / enforce only high-quality commits (which was not the case for many commits in the history), have a policy that is more close to the one from the Linux kernel. With high quality commits, we mean code that is logically split into commits and commit messages that are signed-off and have a proper subject and message body. We do not allow automatic Github merges anymore, since they are total bullshit. However, we will either cherry-pick your patches or pull them manually. *) The old archive was about ~27MB for no particular good reason. This basically derived from the bad decision that also some PDF files where stored there. From this moment onwards, no binary objects are allowed to be stored in this repository anymore. The old archive is not wiped away from the Internet. You will still be able to find it, e.g. on git.cryptoism.org etc. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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