- 07 Aug, 2018 1 commit
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Kirill Smelkov authoredAdd Go counterpart of Python transaction package[1,2]. The Go version is not complete - in particular Transaction.Commit is not yet implemented. However even in this state it is useful to have transaction around for read-only transaction cases. The synchronization logic is more well-thought - in particular there is no dance around "new transaction", because in Go, contrary to ZODB/py, ZODB connections will be always opened under already started transaction. See "Synchronization" section in package documentation for details on this topic. [1] http://transaction.readthedocs.org [2] https://github.com/zopefoundation/transaction
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- 25 Jul, 2018 1 commit
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Kirill Smelkov authored
Previously TxnComplete was typed, but TxnPacked and TxnInprogress were untyped constants. Make all constants have TxnStatus type.
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- 20 Jul, 2018 4 commits
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Kirill Smelkov authored
The reason for this is that the buffer can be shared with other loaders via cache.
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Kirill Smelkov authored
There are situations when we want to work with, or emulate, only subset of whole IStorage functionality, with one already established example being Cache. For this reason split IStorage interface into finer-grained ones. For now: - Loader - Prefetcher - Iterator - Committer - Notifier
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Kirill Smelkov authored
Oid(0) represents root database object. We cannot change this.
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Kirill Smelkov authored
Missed few places in 8685b742.
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- 11 Jul, 2018 16 commits
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Kirill Smelkov authored
While at it add draft overview of data model & friends to package documentation.
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Kirill Smelkov authored
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Kirill Smelkov authored
We send output from tested process to master. We also print it to stdout,stderr so it appears in testnode logs. However till now it was like, whole output first read, and only then emitted to log as a whole, thus not allowing to oversee current test progress by watching testnode log tail. Fix it by implementing the teeing process manually. Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/aa370ca3 fixup! X neotest/runTestSuite: Tee tested process stdout,stderr to testnode logs incrementally lab.nexedi.com/kirr/neo/commit/096550b1 fixup! X neotest/runTestSuite: Tee tested process stdout,stderr to testnode logs incrementally lab.nexedi.com/kirr/neo/commit/63956f43 fixup! X neotest/runTestSuite: Tee tested process stdout,stderr to testnode logs incrementally lab.nexedi.com/kirr/neo/commit/b9819d0e X neotest/runTestSuite: Tee tested process stdout,stderr to testnode logs incrementally
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Kirill Smelkov authored
The wrapper runs `neotest bench-local` in neotest SlapOS instance: https://lab.nexedi.com/nexedi/slapos/blob/ab8705f4/software/neotest/instance.cfg.in Extracted from nexedi/slapos!282
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Kirill Smelkov authored
Add the program that reads results from either bench-local or bench-cluster neotest output and visualizes it. It uses benchlib.py module to read data in Go benchmark format(*), processes them and plots scalability and other graphs via matplotlib. There are lots of hacks and rough edges, and in particular callout coordinate calculation is completely wrong. However even in this state benchplot was used to prepare the graphs in http://navytux.spb.ru/~kirr/neo.html and http://navytux.spb.ru/~kirr/misc/neo·P4.html . Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/078c9ac3 X move benchlib to -> https://lab.nexedi.com/kirr/pygolang lab.nexedi.com/kirr/neo/commit/0edd5129 X benchplot: Teach it to understand benchmark names for partitioned NEO clusters lab.nexedi.com/kirr/neo/commit/a1dde3c9 X deco-rio timings lab.nexedi.com/kirr/neo/commit/916782b6 X normalize/convert units, so that disk and ping/tcp latencies could be plotted too lab.nexedi.com/kirr/neo/commit/f5fec740 X switch node info to labels; start adding that to plot lab.nexedi.com/kirr/neo/commit/906462a3 X neotest: Move cluster / node out fro benchmark name to label in environment lab.nexedi.com/kirr/neo/commit/cceca65f X benchplot: Start of automated plotting for neotest benchmark data lab.nexedi.com/kirr/neo/commit/a9b10a45 X benchlib/benchstat: Emit label:value info for several labels on one line, similary to go version lab.nexedi.com/kirr/neo/commit/502d9477 X benchlib: Python module to read & work with data in Go benchmark format (*) benchlib.py is now part of pygolang: https://pypi.org/project/pygolang .
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Kirill Smelkov authored
These commands do full benchmarking for localhost and networked cases: - show system info - do server & client cpu benchmarks - do server disk benchmarks - for networked case: do network benchmarks - tail to either zbench-local or zbench-cluster It was full `neotest bench-local` that was used to prepare benchmarks for http://navytux.spb.ru/~kirr/neo.html and http://navytux.spb.ru/~kirr/misc/neo·P4.html
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Kirill Smelkov authored
name old time/op new time/op delta unzlib/py/wczdata 20.8µs ± 2% 20.7µs ± 1% ~ (p=0.421 n=5+5) unzlib/go/wczdata 64.4µs ± 1% 21.3µs ± 0% -66.89% (p=0.008 n=5+5) unzlib/py/prod1-avg 4.00µs ± 1% 4.02µs ± 1% ~ (p=0.421 n=5+5) unzlib/go/prod1-avg 10.4µs ± 1% 4.3µs ± 1% -58.72% (p=0.008 n=5+5) There is also unsafe interface with czlib.UnsafeDecompress & friends which I had not tried because even using safe interface brings ~ 3x speedup.
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Kirill Smelkov authored
name old time/op new time/op delta unzlib/py/wczdata 20.7µs ± 2% 20.8µs ± 2% ~ (p=0.548 n=5+5) unzlib/go/wczdata 70.6µs ± 0% 64.4µs ± 1% -8.85% (p=0.008 n=5+5) unzlib/py/prod1-avg 4.02µs ± 1% 4.00µs ± 1% ~ (p=0.167 n=5+5) unzlib/go/prod1-avg 15.2µs ± 0% 10.4µs ± 1% -31.59% (p=0.008 n=5+5) still on wczdata and prod1 much slower compared to py/c zlib.
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Kirill Smelkov authored
NEO uses zlib compression for data, and this way client has to spend time decompressing it. Benchmark how much time zlib decompression takes. With stdlib zlib decompressor out of the box it looks like: name time/op unzlib/py/wczdata 20.7µs ± 2% unzlib/go/wczdata 70.6µs ± 0% unzlib/py/prod1-avg 4.02µs ± 1% unzlib/go/prod1-avg 15.2µs ± 0% i.e. much not in favour of Go. We'll be fixing that in the following patches.
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Kirill Smelkov authored
With zwrk for ZODB being similar to what wrk is for HTTP. Rationale: simulating multiple clients is: 1. noisy - the timings from run to run are changing sometimes up to 50% 2. with significant additional overhead - there are constant OS-level process switches in between client processes and this prevents to actually create the load. 3. the above load from "2" actually takes resources from the server in localhost case. So let's switch to simulating many requests in lightweight way similarly to how it is done in wrk - in one process and not so many threads (it can be just 1) with many connections opened to server and epolly way to load it with Go providing epoll-goroutine matching. Example summarized zbench-local output: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ benchstat -split node,cluster,dataset x.txt name time/object cluster:rio dataset:wczblk1-8 fs1-zhash.py 23.7µs ± 5% fs1-zhash.go 5.68µs ± 8% fs1-zhash.go+prefetch128 6.44µs ±16% zeo/py/fs1-zhash.py 376µs ± 4% zeo/py/fs1-zhash.go 130µs ± 3% zeo/py/fs1-zhash.go+prefetch128 72.3µs ± 4% neo/py(!log)/sqlite·P1-zhash.py 565µs ± 4% neo/py(!log)/sql·P1-zhash.py 491µs ± 8% cluster:rio dataset:prod1-1024 fs1-zhash.py 19.5µs ± 2% fs1-zhash.go 3.92µs ±12% fs1-zhash.go+prefetch128 4.42µs ± 6% zeo/py/fs1-zhash.py 365µs ± 9% zeo/py/fs1-zhash.go 120µs ± 1% zeo/py/fs1-zhash.go+prefetch128 68.4µs ± 3% neo/py(!log)/sqlite·P1-zhash.py 560µs ± 5% neo/py(!log)/sql·P1-zhash.py 482µs ± 8% name req/s cluster:rio dataset:wczblk1-8 fs1-zwrk.go·1 380k ± 2% fs1-zwrk.go·2 666k ± 3% fs1-zwrk.go·3 948k ± 1% fs1-zwrk.go·4 1.24M ± 1% fs1-zwrk.go·8 1.62M ± 0% fs1-zwrk.go·12 1.70M ± 0% fs1-zwrk.go·16 1.71M ± 0% zeo/py/fs1-zwrk.go·1 8.29k ± 1% zeo/py/fs1-zwrk.go·2 10.4k ± 2% zeo/py/fs1-zwrk.go·3 11.2k ± 1% zeo/py/fs1-zwrk.go·4 11.7k ± 1% zeo/py/fs1-zwrk.go·8 12.1k ± 2% zeo/py/fs1-zwrk.go·12 12.3k ± 1% zeo/py/fs1-zwrk.go·16 12.3k ± 2% cluster:rio dataset:prod1-1024 fs1-zwrk.go·1 594k ± 7% fs1-zwrk.go·2 1.14M ± 4% fs1-zwrk.go·3 1.60M ± 2% fs1-zwrk.go·4 2.09M ± 1% fs1-zwrk.go·8 2.74M ± 1% fs1-zwrk.go·12 2.76M ± 0% fs1-zwrk.go·16 2.76M ± 1% zeo/py/fs1-zwrk.go·1 9.42k ± 9% zeo/py/fs1-zwrk.go·2 10.4k ± 1% zeo/py/fs1-zwrk.go·3 11.4k ± 1% zeo/py/fs1-zwrk.go·4 11.7k ± 2% zeo/py/fs1-zwrk.go·8 12.4k ± 1% zeo/py/fs1-zwrk.go·12 12.5k ± 1% zeo/py/fs1-zwrk.go·16 13.4k ±11% name latency-time/object cluster:rio dataset:wczblk1-8 fs1-zwrk.go·1 2.63µs ± 2% fs1-zwrk.go·2 3.00µs ± 3% fs1-zwrk.go·3 3.16µs ± 1% fs1-zwrk.go·4 3.23µs ± 1% fs1-zwrk.go·8 4.94µs ± 0% fs1-zwrk.go·12 7.06µs ± 0% fs1-zwrk.go·16 9.36µs ± 0% zeo/py/fs1-zwrk.go·1 121µs ± 1% zeo/py/fs1-zwrk.go·2 192µs ± 2% zeo/py/fs1-zwrk.go·3 267µs ± 1% zeo/py/fs1-zwrk.go·4 343µs ± 1% zeo/py/fs1-zwrk.go·8 660µs ± 2% zeo/py/fs1-zwrk.go·12 977µs ± 1% zeo/py/fs1-zwrk.go·16 1.30ms ± 2% cluster:rio dataset:prod1-1024 fs1-zwrk.go·1 1.69µs ± 7% fs1-zwrk.go·2 1.76µs ± 4% fs1-zwrk.go·3 1.88µs ± 2% fs1-zwrk.go·4 1.91µs ± 1% fs1-zwrk.go·8 2.92µs ± 1% fs1-zwrk.go·12 4.34µs ± 0% fs1-zwrk.go·16 5.80µs ± 1% zeo/py/fs1-zwrk.go·1 107µs ± 9% zeo/py/fs1-zwrk.go·2 192µs ± 1% zeo/py/fs1-zwrk.go·3 263µs ± 1% zeo/py/fs1-zwrk.go·4 342µs ± 2% zeo/py/fs1-zwrk.go·8 648µs ± 1% zeo/py/fs1-zwrk.go·12 957µs ± 1% zeo/py/fs1-zwrk.go·16 1.20ms ±10% The scalability graphs in http://navytux.spb.ru/~kirr/neo.html were made with simulating client load by zwrk, not many client OS processes. http://navytux.spb.ru/~kirr/neo.html#performance-tests has some additional notes on zwrk. Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/ca0d828b X neotest: Tzwrk1 - place to control running time of 1 zwrk iteration lab.nexedi.com/kirr/neo/commit/bbfb5006 X zwrk: Make sure we warm up connections to all NEO storages when cluster is partitioned lab.nexedi.com/kirr/neo/commit/7f22bba6 X zwrk: New tool to simulate paralell load from multiple clients
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Kirill Smelkov authored
zodb/go provides generic cache (see 7233b4c0 "zodb/go: In-RAM client cache") primarily in order for prefetch to work. However if we need to benchmark a storage with loading some objects several times, this cache can hide the actual time it takes for an object to load. For such use cases add NoCache open option so that opening does not create a cache and always conveys load operations directly to storage driver. The option will be used by zwrk tool (see next patch).
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Kirill Smelkov authored
Add to neotest zbench-local and zbench-cluster commands that perform ZODB benchmarks on FileStorage, ZEO and NEO with Python and Go clients either locally, or with a server and client running on 2 different nodes. There are 2 client programs: tzodb.py and tzodb.go which for now compute hash of whole latest objects stream in a ZODB database. On server side neotest is taught to launch ZEO and various NEO clusters and to execute client load on them. Two test datasets are used: wczblk1-8 - the dataset with wendelin.core ZBlk1 objects covering 8M array, and prod1-1024 - synthethic dataset that tries to represent regular ERP5 instance. Both datasets are very small and so we can assume they reside completely in server disk cache while running benchmarks. Benchmark timings will thus give pure storage software processing latency, as pagecache hit time is on par, or less, to 1µs. Example output: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest zbench-local dataset: wczblk1-8 node: cluster: deco *** generating fs1 data... I: RAM: 7.47GB I: WORK: 0.01GB gen signal t=0...1.05e+06 float64 (= 0.01GB) gen signal blk [0:1048576] (100.0%) VIRT: 297 MB RSS: 48MB *** generating sqlite data... I: RAM: 7.47GB I: WORK: 0.01GB gen signal t=0...1.05e+06 float64 (= 0.01GB) gen signal blk [0:1048576] (100.0%) VIRT: 386 MB RSS: 58MB 2018-07-10 19:57:35.7065 ERROR NEO [ app: 91] primary master is down Cluster state changed *** generating sql data... 2018-07-10 19:57:35 140115116649600 [Note] /usr/sbin/mysqld (mysqld 10.1.29-MariaDB-6+b1) starting as process 27574 ... 2018-07-10 19:57:39 140205509999744 [Note] /usr/sbin/mysqld (mysqld 10.1.29-MariaDB-6+b1) starting as process 27603 ... 2018-07-10 19:57:42 139692109810816 [Note] /usr/sbin/mysqld (mysqld 10.1.29-MariaDB-6+b1) starting as process 27633 ... 2018-07-10 19:57:45 139759221546112 [Note] mysqld (mysqld 10.1.29-MariaDB-6+b1) starting as process 27662 ... I: RAM: 7.47GB I: WORK: 0.01GB gen signal t=0...1.05e+06 float64 (= 0.01GB) gen signal blk [0:1048576] (100.0%) VIRT: 387 MB RSS: 59MB 2018-07-10 19:57:48.2565 ERROR NEO [ app: 91] primary master is down Cluster state changed *** FileStorage Benchmarkfs1-zhash.py 2127 16.3 µs/object # crc32:14640593 nread=8540363 t=0.035s # POLL·2 C1·73 C1E·38 C3·12 C6·36 C7s·0 C8·112 C9·0 C10·62 Benchmarkfs1-zhash.py 2127 16.6 µs/object # crc32:14640593 nread=8540363 t=0.035s # POLL·0 C1·113 C1E·21 C3·16 C6·56 C7s·0 C8·136 C9·0 C10·41 Benchmarkfs1-zhash.py 2127 15.9 µs/object # crc32:14640593 nread=8540363 t=0.034s # POLL·0 C1·71 C1E·36 C3·22 C6·50 C7s·0 C8·167 C9·0 C10·47 Benchmarkfs1-zhash.py 2127 15.9 µs/object # crc32:14640593 nread=8540363 t=0.034s # POLL·0 C1·77 C1E·32 C3·11 C6·55 C7s·0 C8·184 C9·0 C10·31 Benchmarkfs1-zhash.py 2127 16.0 µs/object # crc32:14640593 nread=8540363 t=0.034s # POLL·0 C1·78 C1E·15 C3·12 C6·51 C7s·0 C8·140 C9·0 C10·44 # 16 clients in parallel Benchmarkfs1-zhash.py·P16 2127 129.0 µs/object # crc32:14640593 nread=8540363 t=0.274s Benchmarkfs1-zhash.py·P16 2127 132.6 µs/object # crc32:14640593 nread=8540363 t=0.282s Benchmarkfs1-zhash.py·P16 2127 135.0 µs/object # crc32:14640593 nread=8540363 t=0.287s Benchmarkfs1-zhash.py·P16 2127 135.3 µs/object # crc32:14640593 nread=8540363 t=0.288s Benchmarkfs1-zhash.py·P16 2127 136.6 µs/object # crc32:14640593 nread=8540363 t=0.291s Benchmarkfs1-zhash.py·P16 2127 122.8 µs/object # crc32:14640593 nread=8540363 t=0.261s Benchmarkfs1-zhash.py·P16 2127 130.9 µs/object # crc32:14640593 nread=8540363 t=0.279s Benchmarkfs1-zhash.py·P16 2127 126.4 µs/object # crc32:14640593 nread=8540363 t=0.269s Benchmarkfs1-zhash.py·P16 2127 125.8 µs/object # crc32:14640593 nread=8540363 t=0.268s Benchmarkfs1-zhash.py·P16 2127 108.3 µs/object # crc32:14640593 nread=8540363 t=0.230s Benchmarkfs1-zhash.py·P16 2127 131.0 µs/object # crc32:14640593 nread=8540363 t=0.279s Benchmarkfs1-zhash.py·P16 2127 124.1 µs/object # crc32:14640593 nread=8540363 t=0.264s Benchmarkfs1-zhash.py·P16 2127 129.3 µs/object # crc32:14640593 nread=8540363 t=0.275s Benchmarkfs1-zhash.py·P16 2127 125.0 µs/object # crc32:14640593 nread=8540363 t=0.266s Benchmarkfs1-zhash.py·P16 2127 131.5 µs/object # crc32:14640593 nread=8540363 t=0.280s Benchmarkfs1-zhash.py·P16 2127 131.4 µs/object # crc32:14640593 nread=8540363 t=0.280s # POLL·0 C1·4 C1E·13 C3·11 C6·79 C7s·0 C8·14 C9·0 C10·0 ... And its summary via benchstat: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ benchstat -split node,cluster,dataset x.log name time/object cluster:deco dataset:wczblk1-8 fs1-zhash.py 16.1µs ± 3% fs1-zhash.py·P16 130µs ± 5% fs1-zhash.go 3.00µs ±10% fs1-zhash.go+prefetch128 3.40µs ±18% fs1-zhash.go·P16 10.2µs ±71% zeo/py/fs1-zhash.py 336µs ± 3% zeo/py/fs1-zhash.py·P16 3.22ms ± 6% zeo/py/fs1-zhash.go 112µs ± 2% zeo/py/fs1-zhash.go+prefetch128 60.9µs ± 1% zeo/py/fs1-zhash.go·P16 1.07ms ± 5% neo/py(!log)/sqlite·P1-zhash.py 291µs ± 2% neo/py(!log)/sqlite·P1-zhash.py·P16 2.86ms ± 1% neo/py(!log)/sql·P1-zhash.py 318µs ± 4% neo/py(!log)/sql·P1-zhash.py·P16 3.99ms ± 0% cluster:deco dataset:prod1-1024 fs1-zhash.py 12.3µs ± 1% fs1-zhash.py·P16 106µs ±10% fs1-zhash.go 2.56µs ±10% fs1-zhash.go+prefetch128 2.68µs ± 8% fs1-zhash.go·P16 9.48µs ±43% zeo/py/fs1-zhash.py 319µs ± 3% zeo/py/fs1-zhash.py·P16 3.13ms ± 3% zeo/py/fs1-zhash.go 101µs ± 5% zeo/py/fs1-zhash.go+prefetch128 56.9µs ± 1% zeo/py/fs1-zhash.go·P16 1.19ms ± 4% neo/py(!log)/sqlite·P1-zhash.py 281µs ± 3% neo/py(!log)/sqlite·P1-zhash.py·P16 2.80ms ± 1% neo/py(!log)/sql·P1-zhash.py 316µs ± 1% neo/py(!log)/sql·P1-zhash.py·P16 3.91ms ± 1% Since there is no NEO/go support yet, corresponding neotest parts are merged, but commented-out with appropriate remark. Parallel access is simulated with spawning many OS processes for now. This will change in the nearby followup patch to zwrk. Results of ZODB benchmarking were discussed in http://navytux.spb.ru/~kirr/neo.html#performance-tests , and http://navytux.spb.ru/~kirr/neo.html#results-and-discussion Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/e0d875bc X neotest: Teach it to benchmark NEO with storage partitioned to several nodes lab.nexedi.com/kirr/neo/commit/590f0a46 X neo/py uses n(replica) as n(real-replica) - 1 lab.nexedi.com/kirr/neo/commit/b655da26 X save time not benchmarking things we do not show lab.nexedi.com/kirr/neo/commit/f834f40d X zhash: Show N(obj) read, not 1, in place of N(iter) lab.nexedi.com/kirr/neo/commit/a16e8d52 X teach golang to access ZEO lab.nexedi.com/kirr/neo/commit/b9827725 X switch to using no compression, because this way it is more fair for comparing storage latencies lab.nexedi.com/kirr/neo/commit/c0067335 X neotest: Don't depend on killall lab.nexedi.com/kirr/neo/commit/2bcd6ebb X neotest: add zbench-local & zbench-cluster subcomands lab.nexedi.com/kirr/neo/commit/fb165ad9 X neotest: Also benchmark NEO/py with logging disabled lab.nexedi.com/kirr/neo/commit/2118ba38 X neotest: Help mysqlk_install_db find its basedir under SlapOS lab.nexedi.com/kirr/neo/commit/80eaa05e X zgenprod1 tool lab.nexedi.com/kirr/neo/commit/eb0e516f X check hash result and error if mismatch (zhash.* part); neotest part pending lab.nexedi.com/kirr/neo/commit/046370db X benchify rest of bench-cluster lab.nexedi.com/kirr/neo/commit/2d13818e X bench-local + zhash: Add output in std bench format lab.nexedi.com/kirr/neo/commit/1d692a3b X add NEO/go with SHA1 disabled (both Sgo and Cgo to regular benchmarks)
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Kirill Smelkov authored
Add to neotest bench-net command that performs latency measurments at ping and TCP levels. Example output: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest bench-net neotest@rio:9 node: cluster: deco-rio *** link latency: # deco ⇄ rio (ping 16B) PING rio (192.168.0.8) 16(44) bytes of data. --- rio ping statistics --- 25705 packets transmitted, 25705 received, 0% packet loss, time 2999ms rtt min/avg/max/mdev = 0.080/0.097/0.220/0.011 ms, ipg/ewma 0.116/0.095 ms Benchmarkpingrtt-/16B-min 1 0.080 ms/op Benchmarkpingrtt-/16B-avg 1 0.097 ms/op # POLL·3 C1·476 C1E·60917 C3·53 C6·132 C7s·0 C8·203 C9·0 C10·141 ... *** TCP latency: # deco ⇄ rio (lat_tcp.c 1B -> lat_tcp.c -s) Benchmarktcprtt(c_c)-/1B 1 116.1743 µs/op # TCP latency using rio: 116.1743 microseconds # POLL·6 C1·892 C1E·65748 C3·80 C6·165 C7s·0 C8·339 C9·0 C10·444 Benchmarktcprtt(c_c)-/1B 1 117.2896 µs/op # TCP latency using rio: 117.2896 microseconds # POLL·4 C1·1063 C1E·67647 C3·64 C6·77 C7s·0 C8·144 C9·0 C10·209 Benchmarktcprtt(c_c)-/1B 1 117.5331 µs/op # TCP latency using rio: 117.5331 microseconds # POLL·1 C1·954 C1E·76866 C3·96 C6·88 C7s·0 C8·206 C9·0 C10·246 Benchmarktcprtt(c_c)-/1B 1 117.6509 µs/op # TCP latency using rio: 117.6509 microseconds # POLL·4 C1·731 C1E·84210 C3·103 C6·93 C7s·0 C8·180 C9·0 C10·187 Benchmarktcprtt(c_c)-/1B 1 116.8125 µs/op # TCP latency using rio: 116.8125 microseconds # POLL·9 C1·550 C1E·79544 C3·110 C6·213 C7s·0 C8·508 C9·0 C10·475 ... And its summary via benchstat: name time/op pingrtt-/16B-min 80.0µs ± 0% pingrtt-/16B-avg 97.0µs ± 0% -pingrtt/16B-min 79.0µs ± 0% -pingrtt/16B-avg 112µs ± 0% pingrtt-/1452B-min 241µs ± 0% pingrtt-/1452B-avg 303µs ± 0% -pingrtt/1452B-min 266µs ± 0% -pingrtt/1452B-avg 303µs ± 0% tcprtt(c_c)-/1B 117µs ± 1% tcprtt(c_go)-/1B 122µs ± 2% -tcprtt(c_c)/1B 117µs ± 1% -tcprtt(c_go)/1B 121µs ± 5% tcprtt(c_c)-/1400B 392µs ± 4% tcprtt(c_go)-/1400B 363µs ±18% -tcprtt(c_c)/1400B 412µs ±21% -tcprtt(c_go)/1400B 391µs ±38% tcprtt(c_c)-/1500B 271µs ±18% tcprtt(c_go)-/1500B 290µs ±21% -tcprtt(c_c)/1500B 282µs ±16% -tcprtt(c_go)/1500B 334µs ±24% tcprtt(c_c)-/4096B 711µs ± 5% tcprtt(c_go)-/4096B 737µs ± 5% -tcprtt(c_c)/4096B 740µs ± 2% -tcprtt(c_go)/4096B 711µs ± 7% Latencies here are not good because for this run on rio interrupt mitigation was not tuned (see below). By the way, analyzing ping RTT latencies on our shuttle machines (similar to rio) resulted in the following kernel patch https://git.kernel.org/linus/509708310c (released with Linux 4.15) to fix/being able to adjust interrupt mitigation on Realtek NICs. While at networking topic, teach info/info-local to show related information about node's NICs. Example lines output for deco: nic/eth0: Intel Corporation Ethernet Connection I219-LM rev 21 nic/eth0/features: rx tx sg tso !ufo gso gro !lro rxvlan txvlan !ntuple rxhash ... nic/eth0/coalesce: rxc: 3μs/0f/0μs-irq/0f-irq, txc: 0μs/0f/0μs-irq/0f-irq nic/eth0/status: up, speed=1000, mtu=1500, txqlen=1000, gro_flush_timeout=0.000µs nic/wlan0: Intel Corporation Wireless 8260 rev 3a nic/wlan0/features: !rx !tx sg !tso !ufo gso gro !lro !rxvlan !txvlan !ntuple !rxhash ... nic/wlan0/coalesce: rxc: ?, txc: ? nic/wlan0/status: down, speed=?, mtu=1500, txqlen=1000, gro_flush_timeout=0.000µs WARNING: nic/wlan0: TSO not enabled - TCP latency with packets > MSS will be poor for rio: nic/eth0: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller rev 06 nic/eth0/features: rx !tx !sg !tso !ufo !gso gro !lro rxvlan txvlan !ntuple !rxhash ... nic/eth0/coalesce: rxc: 200μs/4f/0μs-irq/0f-irq, txc: 200μs/4f/0μs-irq/0f-irq nic/eth0/status: up, speed=1000, mtu=1500, txqlen=1000, gro_flush_timeout=0.000µs WARNING: nic/eth0: TSO not enabled - TCP latency with packets > MSS will be poor WARNING: nic/eth0: RX coalesce latency is max 200μs - that will add to networked request-reply latency nic/eth1: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller rev 06 nic/eth1/features: rx !tx !sg !tso !ufo !gso gro !lro rxvlan txvlan !ntuple !rxhash ... nic/eth1/coalesce: rxc: 0μs/1f/0μs-irq/0f-irq, txc: 0μs/1f/0μs-irq/0f-irq nic/eth1/status: down, speed=?, mtu=1500, txqlen=1000, gro_flush_timeout=0.000µs WARNING: nic/eth1: TSO not enabled - TCP latency with packets > MSS will be poor The warning about "RX coalesce latency is max 200μs ..." says that on receive path eth0 will be coalescing incoming frames for up to 200μs and this way this delay will be added to overal latency. (for small frames Realtek NICs do not coalesce interrupts - see details in the kernel patch). Networked performance (raw and NEO) was not discussed in http://navytux.spb.ru/~kirr/neo.html at all, but for the reference the importance of C-states for performance was first found via this networking latency benchmarks. Links on C-states topic: http://navytux.spb.ru/~kirr/neo.html#cpu-idle-c-states http://navytux.spb.ru/~kirr/neo.html#appendix-ii-cpu-c-states Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/e8e395ae X neotest: Move network benchmarking into separate function + add `neotest bench-net` lab.nexedi.com/kirr/neo/commit/a971231c X neotest/info: Handle USB NICs lab.nexedi.com/kirr/neo/commit/5dd3d1ab X neotest: sort NIC names lab.nexedi.com/kirr/neo/commit/9888f047 X neotest: Do not crash if kernel is too old to support gro_flush_timeout lab.nexedi.com/kirr/neo/commit/3a1bdf4a X bench-remote / tcp : std benchmark output lab.nexedi.com/kirr/neo/commit/9450b6db X bench-remote / ping += std bench output lab.nexedi.com/kirr/neo/commit/68d5b015 X show gro_flush_timeout + friends lab.nexedi.com/kirr/neo/commit/4c815af9 X neotest: Show NIC features and emit warning if !TSO lab.nexedi.com/kirr/neo/commit/659ce938 X neotest: Adjust ping and TCP RR sizes to fit 1 Ethernet frame, etc... lab.nexedi.com/kirr/neo/commit/ded384cb X neotest += `lat_tcp.go -s` lab.nexedi.com/kirr/neo/commit/59d46504 X neotest += lat_tcp lab.nexedi.com/kirr/neo/commit/67fc3440 X show small (56B) and full-packet (1472B) ping link latencies
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Kirill Smelkov authored
Add to neotest bench-disk command that performs random-read disk benchmarks via ioping. Example output: (venv) (8) neotest@rio:~/8/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest bench-disk node: rio cluster: *** disk: random direct (no kernel cache) 4K-read latency --- . (ext4 /dev/sda1) ioping statistics --- 29.1 k requests completed in 2.95 s, 113.6 MiB read, 9.85 k iops, 38.5 MiB/s generated 29.1 k requests in 3.00 s, 113.6 MiB, 9.69 k iops, 37.9 MiB/s min/avg/max/mdev = 43.2 us / 101.5 us / 250.0 us / 7.48 us Benchmarkdisk/randread/direct/4K-min 1 43.2 us/op Benchmarkdisk/randread/direct/4K-avg 1 101.5 us/op < 59.2 us 458 | < 63.0 us 0 | < 66.7 us 0 | < 70.5 us 0 | < 74.2 us 1 | < 78.0 us 1 | < 81.7 us 0 | < 85.5 us 1 | < 89.2 us 0 | < 93.0 us 0 | < 96.7 us 0 | < 100.5 us 333 | < 104.2 us 27793 | *********************************************** < 108.0 us 259 | < 111.7 us 21 | < 115.5 us 8 | < 119.2 us 18 | < 123.0 us 1 | < 126.7 us 0 | < 130.5 us 7 | < 134.2 us 59 | < +∞ 18 | # POLL·186 C1·291360 C1E·290802 C3·31 C6·1218 ... *** disk: random cached 4K-read latency --- . (ext4 /dev/sda1) ioping statistics --- 3.15 M requests completed in 2.82 s, 12.0 GiB read, 1.12 M iops, 4.26 GiB/s generated 3.15 M requests in 3.00 s, 12.0 GiB, 1.05 M iops, 4.00 GiB/s min/avg/max/mdev = 465 ns / 896 ns / 37.4 us / 183 ns Benchmarkdisk/randread/pagecache/4K-min 1 465 ns/op Benchmarkdisk/randread/pagecache/4K-avg 1 896 ns/op < 839 ns 771375 | ************ < 872 ns 609361 | ********* < 905 ns 660635 | ********** < 938 ns 505305 | ******** < 971 ns 189182 | *** < 1.00 us 93655 | * < 1.04 us 70811 | * < 1.07 us 57650 | < 1.10 us 51587 | < 1.14 us 44648 | < 1.17 us 40868 | < 1.20 us 27301 | < 1.24 us 12503 | < 1.27 us 5580 | < 1.30 us 2517 | < 1.34 us 1404 | < 1.37 us 698 | < 1.40 us 378 | < 1.44 us 208 | < 1.47 us 119 | < 1.50 us 50 | < +∞ 978 | # POLL·1 C1·57 C1E·11 C3·2 C6·257 The benchmarks are so done so that output conforms to Go benchmarking format. This way it is possible to process the output with benchstat to summarize / compare results. For above run summarization gives: name time/op disk/randread/direct/4K-min 39.0µs ±12% disk/randread/direct/4K-avg 117µs ± 3% disk/randread/pagecache/4K-min 461ns ± 3% disk/randread/pagecache/4K-avg 880ns ± 0% While at disk topic, teach info/info-local to show related information about node's disk. Example line output for rio: disk/sda: Samsung SSD 840 rev BB0Q 931.5G Please see http://navytux.spb.ru/~kirr/neo.html#the-need-for-faster-storage http://navytux.spb.ru/~kirr/neo.html#appendix-i-ssd-latency for some discussion about SSD performance. Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/d35a2fdf X neotest/info-local: Fix disk display in presence of bind-mounts lab.nexedi.com/kirr/neo/commit/44529dbf X neotest/bench-disk: Deduplicate code; change 1M -> 2M lab.nexedi.com/kirr/neo/commit/8bac3dba X neotest/bench-disk: Also benchmark randomly reading 1M blocks lab.nexedi.com/kirr/neo/commit/e795c6ed X neotest: Fix disk display in case of DM lab.nexedi.com/kirr/neo/commit/352cd100 X neotest: Fix disk display in case of MD lab.nexedi.com/kirr/neo/commit/cd2cd093 X bench_disk: Add std bench format lab.nexedi.com/kirr/neo/commit/9f86eb40 X bench += ioping
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Kirill Smelkov authored
Add to neotest bench-cpu command that performs basic CPU benchmarks: pystone and CRC32/SHA1 for now. While every benchmark is run additionally C-states profile is collected(*). Example output: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest bench-cpu node: deco cluster: Benchmarkpystone 1 283297 pystone/s # POLL·1 C1·16 C1E·9 C3·25 C6·32 C7s·0 C8·69 C9·0 C10·6 Benchmarkpystone 1 289788 pystone/s # POLL·0 C1·0 C1E·7 C3·10 C6·49 C7s·0 C8·45 C9·0 C10·7 Benchmarkpystone 1 286329 pystone/s # POLL·0 C1·0 C1E·18 C3·16 C6·37 C7s·0 C8·63 C9·0 C10·6 Benchmarkpystone 1 292087 pystone/s # POLL·0 C1·0 C1E·4 C3·17 C6·40 C7s·0 C8·56 C9·0 C10·3 Benchmarkpystone 1 290119 pystone/s # POLL·0 C1·0 C1E·6 C3·13 C6·46 C7s·0 C8·68 C9·0 C10·5 Benchmarkcrc32/py/4K 300000 3.415 µs/op # POLL·2 C1·52 C1E·27 C3·9 C6·37 C7s·0 C8·78 C9·0 C10·71 Benchmarkcrc32/py/4K 300000 3.402 µs/op # POLL·0 C1·35 C1E·24 C3·18 C6·38 C7s·0 C8·88 C9·0 C10·77 Benchmarkcrc32/py/4K 300000 3.396 µs/op # POLL·0 C1·28 C1E·26 C3·12 C6·57 C7s·0 C8·86 C9·0 C10·36 Benchmarkcrc32/py/4K 300000 3.435 µs/op # POLL·0 C1·48 C1E·24 C3·8 C6·46 C7s·0 C8·64 C9·0 C10·79 Benchmarkcrc32/py/4K 300000 3.434 µs/op # POLL·1 C1·37 C1E·25 C3·11 C6·42 C7s·0 C8·72 C9·0 C10·55 Benchmarkcrc32/go/4K 10000000 0.219 µs/op # POLL·0 C1·171 C1E·108 C3·17 C6·62 C7s·0 C8·164 C9·0 C10·295 Benchmarkcrc32/go/4K 10000000 0.216 µs/op # POLL·3 C1·131 C1E·128 C3·22 C6·82 C7s·0 C8·179 C9·0 C10·330 Benchmarkcrc32/go/4K 10000000 0.218 µs/op # POLL·3 C1·157 C1E·96 C3·22 C6·72 C7s·0 C8·141 C9·0 C10·301 Benchmarkcrc32/go/4K 10000000 0.218 µs/op # POLL·3 C1·154 C1E·104 C3·14 C6·63 C7s·0 C8·153 C9·0 C10·309 Benchmarkcrc32/go/4K 10000000 0.219 µs/op # POLL·1 C1·170 C1E·103 C3·25 C6·80 C7s·0 C8·177 C9·0 C10·328 Benchmarksha1/py/4K 300000 4.553 µs/op # POLL·1 C1·35 C1E·41 C3·14 C6·49 C7s·0 C8·95 C9·0 C10·94 Benchmarksha1/py/4K 300000 4.459 µs/op # POLL·2 C1·39 C1E·36 C3·19 C6·53 C7s·0 C8·127 C9·0 C10·92 Benchmarksha1/py/4K 300000 4.492 µs/op # POLL·2 C1·66 C1E·30 C3·15 C6·47 C7s·0 C8·96 C9·0 C10·62 Benchmarksha1/py/4K 300000 4.550 µs/op # POLL·1 C1·51 C1E·44 C3·10 C6·46 C7s·0 C8·92 C9·0 C10·93 Benchmarksha1/py/4K 300000 4.518 µs/op # POLL·3 C1·41 C1E·29 C3·18 C6·35 C7s·0 C8·81 C9·0 C10·78 Benchmarksha1/go/4K 300000 4.312 µs/op # POLL·0 C1·122 C1E·67 C3·24 C6·67 C7s·0 C8·131 C9·0 C10·190 Benchmarksha1/go/4K 300000 4.383 µs/op # POLL·2 C1·126 C1E·74 C3·17 C6·80 C7s·0 C8·123 C9·0 C10·182 Benchmarksha1/go/4K 300000 4.387 µs/op # POLL·2 C1·100 C1E·65 C3·27 C6·56 C7s·0 C8·127 C9·0 C10·186 Benchmarksha1/go/4K 300000 4.328 µs/op # POLL·1 C1·136 C1E·80 C3·14 C6·76 C7s·0 C8·113 C9·0 C10·179 Benchmarksha1/go/4K 300000 4.337 µs/op # POLL·1 C1·96 C1E·81 C3·21 C6·68 C7s·0 C8·132 C9·0 C10·191 Such raw output can be summarized with the help of benchstat - either with Go[1] or Python[2] implementations: $ benchstat x.txt name pystone/s pystone 288k ± 2% name time/op crc32/py/4K 3.42µs ± 1% crc32/go/4K 218ns ± 1% sha1/py/4K 4.51µs ± 1% sha1/go/4K 4.35µs ± 1% See http://navytux.spb.ru/~kirr/neo.html#results-and-discussion for some discussion on SHA1 vs CRC32. While at CPU topic, teach info/info-local to show related information about node's CPU: available processors, frequency and idle governors. Example of lines added: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest info neotest@rio.kirr.nexedi.com:6 ... cpu: Intel(R) Core(TM) i7-3770S CPU @ 3.10GHz cpu/[0-7]/freq: intel_pstate/powersave [1.60GHz - 3.90GHz] cpu/[0-7]/idle: intel_idle/menu: POLL·0/0 C1·1/1 C1E·10/20 C3·59/156 C6·80/300 # elat/tres µs WARNING: cpu: frequency not fixed - benchmark timings won't be stable WARNING: cpu: C-state exit-latency is max 80μs - benchmark timings won't be stable WARNING: cpu: (up to that might be adding to networked and IPC request-reply latency) See http://navytux.spb.ru/~kirr/neo.html#measurements-stability to understand why there are warnings in above example. Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/cf1f7c24 X tcpu: Don't depend on running tests with cwd = .../go/neo/t/ lab.nexedi.com/kirr/neo/commit/1e438610 fixup! X neotest: Also show target-latency for C-states lab.nexedi.com/kirr/neo/commit/4af48245 X neotest: Also show target-latency for C-states lab.nexedi.com/kirr/neo/commit/2910cf56 X neotest: Prefer first part of FQDN for hostname lab.nexedi.com/kirr/neo/commit/c86ba1b0 X bench-cpu += crc32, adler32 lab.nexedi.com/kirr/neo/commit/4ac3a550 X neotest: Don't use bc lab.nexedi.com/kirr/neo/commit/3918a997 X neotest: Don't assume we are invoked from the directory where neotest is lab.nexedi.com/kirr/neo/commit/9a266d11 X neotest/bench-cpu: Also benchmark sha1 for 2M; report size units as e.g. 4K not 4096B lab.nexedi.com/kirr/neo/commit/b6a830d8 X switch cpu benchmarks to go format lab.nexedi.com/kirr/neo/commit/4436b983 X neotest: Provide cpustat command so it is possible to cpustat something external lab.nexedi.com/kirr/neo/commit/b062b349 X microbenchmark CPU first lab.nexedi.com/kirr/neo/commit/a4a18b55 X first cut on C-state profiling lab.nexedi.com/kirr/neo/commit/ea1e0835 X found that cpuidle can be affecting latency a lot! (*) see http://navytux.spb.ru/~kirr/neo.html#cpu-idle-c-states and http://navytux.spb.ru/~kirr/neo.html#appendix-ii-cpu-c-states for why this is important. Since being able to profile C-states can be generally useful, we expose such profiling with externally-visible `neotest cpustat` utility. [1] https://godoc.org/golang.org/x/perf/cmd/benchstat [2] https://lab.nexedi.com/kirr/pygolang/blob/master/golang/x/perf/benchlib.py
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Kirill Smelkov authored
For testing and benchmarking how NEO/py & NEO/go interact with each other we need corresponding test driver. Neotest will be that driver and present patch begins it: - neotest can deploy NEO/{go,py} checkout either locally or on remote node; - it can run NEO/{go,py} unit tests either locally or on remote node; - it can also show information about a system - either local or remote. Examples in action. Banner: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest Neotest is a tool to test and benchmark NEO. Usage: neotest command [arguments] The commands are: test run all tests on a remote host test-local run all tests locally test-go run NEO/go unit tests (part of test-local) test-py run NEO/py unit tests (part of test-local) deploy deploy NEO & needed software for tests to remote host deploy-local deploy NEO & needed software for tests locally info print information about a node info-local print information about local deployment Deploy to another node: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest deploy neotest@rio.kirr.nexedi.com:3 *** deploying to neotest@rio.kirr.nexedi.com:3 ... ... # deployed ok Print information about that node: x/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest info neotest@rio.kirr.nexedi.com:3 date: Sun, 08 Jul 2018 21:30:43 +0300 xnode: neotest@rio.kirr.nexedi.com (2401:5180:0:2a::1 192.168.0.8) uname: Linux rio 4.16.0-2-amd64 #1 SMP Debian 4.16.16-2 (2018-06-22) x86_64 GNU/Linux sw/python: Python 2.7.15 sw/go: go version go1.10.3 linux/amd64 sw/sqlite: sqlite 3.24.0 (py mod 2.6.0) sw/mysqld: mysqld Ver 10.1.29-MariaDB-6+b1 for debian-linux-gnu on x86_64 (Debian buildd-unstable) sw/neo: v1.9-42-g972ff5f9 sw/zodb: 5.4.0 sw/zeo: 5.2.0 sw/mysqlclient: 1.3.13 Run NEO/{py,go} unit tests there: x/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest test neotest@rio.kirr.nexedi.com:4 ? lab.nexedi.com/kirr/neo/go/internal/packed [no test files] ok lab.nexedi.com/kirr/neo/go/neo/neonet (cached) ok lab.nexedi.com/kirr/neo/go/neo/proto (cached) ok lab.nexedi.com/kirr/neo/go/zodb (cached) ? lab.nexedi.com/kirr/neo/go/zodb/cmd/zodb [no test files] ? lab.nexedi.com/kirr/neo/go/zodb/internal/pickletools [no test files] ? lab.nexedi.com/kirr/neo/go/zodb/storage [no test files] ok lab.nexedi.com/kirr/neo/go/zodb/storage/fs1 (cached) ? lab.nexedi.com/kirr/neo/go/zodb/storage/fs1/cmd/fs1 [no test files] ok lab.nexedi.com/kirr/neo/go/zodb/storage/fs1/fs1tools (cached) ? lab.nexedi.com/kirr/neo/go/zodb/storage/fs1/fsb [no test files] ? lab.nexedi.com/kirr/neo/go/zodb/storage/zeo [no test files] ? lab.nexedi.com/kirr/neo/go/zodb/wks [no test files] ok lab.nexedi.com/kirr/neo/go/zodb/zodbtools (cached) ...........................................................................E.EE....c....^C Neotest will be the driver that was used to prepare benchmarks in http://navytux.spb.ru/~kirr/neo.html and http://navytux.spb.ru/~kirr/misc/neo·P4.html . Some draft history related to this patch: lab.nexedi.com/kirr/neo/commit/d46afb3e X neotest: Teach it to also run go & py unit tests; hook it into nxd/runTestSuite lab.nexedi.com/kirr/neo/commit/f694d643 X neotest: Don't fail silently if network address detection fails lab.nexedi.com/kirr/neo/commit/fa78290a X neotest: FQDN host name might be not configured lab.nexedi.com/kirr/neo/commit/56faccad X neotest/info-local: Don't crash if a prog could not be found lab.nexedi.com/kirr/neo/commit/f2932247 X neotest/info-local: Don't crash if an egg could not be found lab.nexedi.com/kirr/neo/commit/f06b7302 X neotest: Determine machine IP addresses via `ip ...` directly, not `getent ...` lab.nexedi.com/kirr/neo/commit/42e5fe71 X neotest info
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- 08 Jul, 2018 11 commits
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Kirill Smelkov authored
In particular try to support ZEO4: - during handshake we now first wait for remote server to announce its preferred protocol, and only then send the version we select to use. This is the procedure original ZEO server-client do. - teach rpc.call to decode exceptions not only for how ZEO5 encodes them (marking via 2 flag in "async" field), but also on how ZEO4 and earlier encode them: via replying with (exc_type, exc_inst) and expecting client to dynamically check exc_type is a subtype of Exception. - handle other protocol differences - e.g. ZEO5 returns last_tid on register(), while earlier versions return nothing there. Tests pending.
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Kirill Smelkov authored
For the reference on deco (performance, frequency not fixed): name time/object deco/fs1/zhash.py 15.8µs ± 2% deco/fs1/zhash.py-P16 116µs ±12% deco/fs1/zhash.go 2.60µs ± 0% deco/fs1/zhash.go+prefetch128 3.70µs ±11% deco/fs1/zhash.go-P16 13.4µs ±43% deco/zeo/zhash.py 316µs ± 7% deco/zeo/zhash.py-P16 2.68ms ± 7% deco/zeo/zhash.go 111µs ± 2% deco/zeo/zhash.go+prefetch128 57.7µs ± 2% deco/zeo/zhash.go-P16 1.23ms ± 5% and in particular it shows that with the same ZEO/py server, the latency to load an object via py client is ~ 3x worse compared to the latency to load the same object via hereby Go client. The performance was obtained via forthcoming neotest, and in particular ZEO/go client will be also used in forthcoming zwrk (no analog on python side). See http://navytux.spb.ru/~kirr/neo.html#performance-tests for details. Tests: pending.
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Kirill Smelkov authored
As the first step factor-out int64 Xint64 checker from zodb/storagefs1/index.go into there. We'll need the checker in the next patch.
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Kirill Smelkov authored
In situations when created connections are used to only send/receive 1 request/response, the overhead to create/shutdown full connections could be too much. Unfortunately this is exactly the mode that is currently primarily used for compatibility with NEO/py. To help mitigate the overhead in such scenarios, lightweight connections mode is provided: At requester side, one message can be sent over node link with link.Send1 . Inside a connection will be created and then shut down, but since the code manages whole process internally and does not show the connection to user, it can optimize those operations significantly. Similarly link.Ask1 sends 1 request, receives 1 response, and then puts the connection back into pool for later reuse. At receiver side, link.Recv1 accepts a connection with the first message remote peer sent us when establishing it, and wraps the result into Request object. The Request contains the message received and internally the connection. A response can be sent back via Request.Reply. Then once Request.Close is called the connection object that was accepted is immediately put back into pool for later reuse. Some history of lightweight mode: lab.nexedi.com/kirr/neo/commit/0fa96338 X Clarified Request.Close semantics - tests working again lab.nexedi.com/kirr/neo/commit/a5ac1652 X Ask1: switch to sending directly over link lab.nexedi.com/kirr/neo/commit/755e3654 X Request.Reply: switch to replying directly over link lab.nexedi.com/kirr/neo/commit/c643ba53 X Send1: switch to sending directly over link lab.nexedi.com/kirr/neo/commit/7dcbc9c5 X Send1: switch to lightClose lab.nexedi.com/kirr/neo/commit/851864a9 X chan RTT benchmark which simulates Recv1 = Accept + Recv lab.nexedi.com/kirr/neo/commit/099bfc29 X freelist for PktBuf lab.nexedi.com/kirr/neo/commit/58c2e39a X Benchmark for link Ask1/Recv1 over TCP loopback
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Kirill Smelkov authored
Provide Conn.Send and Conn.Recv which work on NEO messages and automatically encode/decode them into packets on the fly. Similarly to NEO/py also provide Ask to send a request and receive expected reply and Expect which does only the latter half of Ask.
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Kirill Smelkov authored
Implement NEO protocol handshaking and use it in newly provided DialLink and ListenLink which correspondingly first do regular network dial or listen and than perform the handshake on just established TCP connection. If handshake goes ok, the result is wrapped into NodeLink. Some history: lab.nexedi.com/kirr/neo/commit/8d0a1469 X Handshake draftly done See also http://navytux.spb.ru/~kirr/neo.html#development-overview (starting from "The neonet module also provides DialLink and ListenLink ...")
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Kirill Smelkov authored
Continue NEO/go with neonet - the layer to exchange messages in between NEO nodes. NEO/go shifts from thinking about NEO protocol logic as RPC to thinking of it as more general network protocol and so settles to provide general connection-oriented message exchange service. This way neonet provides generic connection multiplexing on top of a single TCP node-node link. Neonet compatibility with NEO/py depends on the following small NEO/py patch: dd3bb8b4 which adjusts message ID a bit so it behaves like stream_id in HTTP/2: - always even for server initiated streams - always odd for client initiated streams and is incremented by += 2, instead of += 1 to maintain above invariant. See http://navytux.spb.ru/~kirr/neo.html#development-overview (starting from "Then comes the link layer which provides service to exchange messages over network...") for the rationale. Unfortunately current NEO/py maintainer is very much against merging that patch. This patch brings in the core of neonet. Next patches will add initial handshaking, user-level Send/Recv + Ask/Expect and "lightweight mode". Some neonet core history: lab.nexedi.com/kirr/neo/commit/6b9ed46d X neonet: Avoid integer overflow on max packet length check lab.nexedi.com/kirr/neo/commit/8eac771c X neo/connection: Fix race between link.shutdown() and conn.lightClose() lab.nexedi.com/kirr/neo/commit/8021a1d5 X rxghandoff lab.nexedi.com/kirr/neo/commit/68738036 X ... but negative impact on separate client / server processes, strange ... lab.nexedi.com/kirr/neo/commit/b0dda9d2 X serveRecv: help Go scheduler to switch to receiving G sooner lab.nexedi.com/kirr/neo/commit/4989918a X remove defer from rx/tx hot paths lab.nexedi.com/kirr/neo/commit/e055406a X no select for acceptq - similarly for rxq path lab.nexedi.com/kirr/neo/commit/c28ad4d0 X Conn.Recv: receive without select lab.nexedi.com/kirr/neo/commit/496bd425 X add benchmark RTT over plain net.Conn with serveRecv-style RX handler lab.nexedi.com/kirr/neo/commit/9fa79958 X draft how to mark RX down without reallocating .rxdown lab.nexedi.com/kirr/neo/commit/4324c812 X restore all Conn functionality lab.nexedi.com/kirr/neo/commit/a8e61d2f X serveSend is not needed lab.nexedi.com/kirr/neo/commit/9d047b36 X recvPkt via only 1 syscall lab.nexedi.com/kirr/neo/commit/b555a507 X baseline net RTT benchmark lab.nexedi.com/kirr/neo/commit/91be5cdd X everyone is listening from start; CloseAccept to disable listening - works lab.nexedi.com/kirr/neo/commit/c2a1b63a X naming: Packet = raw data; Message = meaningful object lab.nexedi.com/kirr/neo/commit/6fd0c9be X connection: Adding context to errors from NodeLink and Conn operations lab.nexedi.com/kirr/neo/commit/65b17bdc X rework Conn acceptance to be explicit via NodeLink.Accept -
Kirill Smelkov authored
This brings some go/py compatibility checks that verify go and python treat a message code equally. Although messages encoding are tested in the previous patch there is no explicit tests for go/py compatibility on messages encoding.
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Kirill Smelkov authored
Provide a way for every message to be encoded/decoded to/from NEO wire encoding. For this introduce Msg interface with wire coding methods and provide such methods for all message types. For selected types the methods are implemented manually. For most of the types the methods are generated automatically by protogen.go program. protogen.go was mentioned in http://navytux.spb.ru/~kirr/neo.html#development-overview in "On server-side NEO/go work started by first implementing messages serialization in exactly the same wire format as NEO/py does ..." paragraph. A bit of late protogen fixups history: lab.nexedi.com/kirr/neo/commit/c884bfd5 lab.nexedi.com/kirr/neo/commit/385d813a lab.nexedi.com/kirr/neo/commit/0f7e0b00 lab.nexedi.com/kirr/neo/commit/de3ef2c0 Also a message type can be reverse-looked up by message code via MsgType(). This will be later used in network receive code path.
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Kirill Smelkov authored
Provide routines to convert selected types to string and also for UUID and Address <-> string encoding/decoding.
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Kirill Smelkov authored
Start NEO/go code with protocol package that defines message that NEO nodes exchange in between each other. The definition is based on neo/lib/protocol.py and is kept in sync with that file. This commit brings only messages definition. Messages serialization will come in the follow-up patch.
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- 05 Jul, 2018 1 commit
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Kirill Smelkov authored
We will need to use BE16 and BE32 in the next patch.
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- 04 Jul, 2018 1 commit
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Kirill Smelkov authored
See nexedi/zodbtools@b1163449 for details.
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- 03 Jul, 2018 1 commit
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Kirill Smelkov authored
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- 09 Apr, 2018 1 commit
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Kirill Smelkov authored
Tomáš Peterka noticed that gotos in dump.go are not actually needed because the same functionality could be achieved with defer in more clean and structured way. Do it. This brings ~ 5% performance hit name old time/op new time/op delta ZodbDump-4 148µs ± 1% 155µs ± 2% +4.69% (p=0.000 n=9+10) because defer implementation is currently not great (https://github.com/golang/go/issues/14939) If we absolutely need those 5% back it could be worked around similar to e.g. FileStorage.Load: https://lab.nexedi.com/kirr/neo/blob/6faed528/go/zodb/storage/fs1/filestorage.go#L133 https://lab.nexedi.com/kirr/neo/blob/6faed528/go/zodb/storage/fs1/filestorage.go#L141 /suggested-by @katomaso
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- 13 Mar, 2018 1 commit
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Julien Muchembled authored
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- 02 Mar, 2018 2 commits
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Julien Muchembled authored
Before, it waited for upstream activity until all partitions are touched. However, when upstream is idle the backup cluster could remain stuck forever if it was interrupted whereas some cells were still late.
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Julien Muchembled authored
The 'min_tid < new_tid' assertion failed when jumping to the past.
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