209 lines
7.4 KiB
Nim
209 lines
7.4 KiB
Nim
# Constantine
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# Copyright (c) 2018-2019 Status Research & Development GmbH
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# Copyright (c) 2020-Present Mamy André-Ratsimbazafy
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at http://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at http://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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# ############################################################
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#
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# Benchmark of elliptic curves
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#
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# ############################################################
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import
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# Internals
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../constantine/config/[curves, common],
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../constantine/arithmetic,
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../constantine/io/io_bigints,
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../constantine/elliptic/[ec_weierstrass_affine, ec_weierstrass_projective, ec_scalar_mul, ec_endomorphism_accel],
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# Helpers
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../helpers/[prng_unsafe, static_for],
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./platforms,
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# Standard library
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std/[monotimes, times, strformat, strutils, macros],
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# Reference unsafe scalar multiplication
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../tests/support/ec_reference_scalar_mult
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var rng: RngState
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let seed = uint32(getTime().toUnix() and (1'i64 shl 32 - 1)) # unixTime mod 2^32
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rng.seed(seed)
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echo "bench xoshiro512** seed: ", seed
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# warmup
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proc warmup*() =
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# Warmup - make sure cpu is on max perf
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let start = cpuTime()
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var foo = 123
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for i in 0 ..< 300_000_000:
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foo += i*i mod 456
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foo = foo mod 789
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# Compiler shouldn't optimize away the results as cpuTime rely on sideeffects
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let stop = cpuTime()
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echo &"Warmup: {stop - start:>4.4f} s, result {foo} (displayed to avoid compiler optimizing warmup away)\n"
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warmup()
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when defined(gcc):
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echo "\nCompiled with GCC"
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elif defined(clang):
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echo "\nCompiled with Clang"
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elif defined(vcc):
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echo "\nCompiled with MSVC"
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elif defined(icc):
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echo "\nCompiled with ICC"
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else:
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echo "\nCompiled with an unknown compiler"
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echo "Optimization level => "
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echo " no optimization: ", not defined(release)
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echo " release: ", defined(release)
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echo " danger: ", defined(danger)
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echo " inline assembly: ", UseASM_X86_64
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when (sizeof(int) == 4) or defined(Constantine32):
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echo "⚠️ Warning: using Constantine with 32-bit limbs"
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else:
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echo "Using Constantine with 64-bit limbs"
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when SupportsCPUName:
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echo "Running on ", cpuName(), ""
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when SupportsGetTicks:
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echo "\n⚠️ Cycles measurements are approximate and use the CPU nominal clock: Turbo-Boost and overclocking will skew them."
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echo "i.e. a 20% overclock will be about 20% off (assuming no dynamic frequency scaling)"
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echo "\n=================================================================================================================\n"
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proc separator*() =
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echo "-".repeat(177)
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proc report(op, elliptic: string, start, stop: MonoTime, startClk, stopClk: int64, iters: int) =
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let ns = inNanoseconds((stop-start) div iters)
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let throughput = 1e9 / float64(ns)
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when SupportsGetTicks:
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echo &"{op:<60} {elliptic:<40} {throughput:>15.3f} ops/s {ns:>9} ns/op {(stopClk - startClk) div iters:>9} CPU cycles (approx)"
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else:
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echo &"{op:<60} {elliptic:<40} {throughput:>15.3f} ops/s {ns:>9} ns/op"
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proc notes*() =
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echo "Notes:"
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echo " - Compilers:"
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echo " Compilers are severely limited on multiprecision arithmetic."
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echo " Constantine compile-time assembler is used by default (nimble bench_fp)."
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echo " GCC is significantly slower than Clang on multiprecision arithmetic due to catastrophic handling of carries."
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echo " GCC also seems to have issues with large temporaries and register spilling."
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echo " This is somewhat alleviated by Constantine compile-time assembler."
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echo " Bench on specific compiler with assembler: \"nimble bench_ec_g1_gcc\" or \"nimble bench_ec_g1_clang\"."
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echo " Bench on specific compiler with assembler: \"nimble bench_ec_g1_gcc_noasm\" or \"nimble bench_ec_g1_clang_noasm\"."
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echo " - The simplest operations might be optimized away by the compiler."
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echo " - Fast Squaring and Fast Multiplication are possible if there are spare bits in the prime representation (i.e. the prime uses 254 bits out of 256 bits)"
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macro fixEllipticDisplay(T: typedesc): untyped =
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# At compile-time, enums are integers and their display is buggy
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# we get the Curve ID instead of the curve name.
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let instantiated = T.getTypeInst()
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var name = $instantiated[1][0] # EllipticEquationFormCoordinates
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let fieldName = $instantiated[1][1][0]
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let curveName = $Curve(instantiated[1][1][1].intVal)
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name.add "[" & fieldName & "[" & curveName & "]]"
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result = newLit name
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template bench(op: string, T: typedesc, iters: int, body: untyped): untyped =
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let start = getMonotime()
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when SupportsGetTicks:
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let startClk = getTicks()
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for _ in 0 ..< iters:
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body
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when SupportsGetTicks:
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let stopClk = getTicks()
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let stop = getMonotime()
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when not SupportsGetTicks:
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let startClk = -1'i64
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let stopClk = -1'i64
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report(op, fixEllipticDisplay(T), start, stop, startClk, stopClk, iters)
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proc addBench*(T: typedesc, iters: int) =
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T)
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let Q = rng.random_unsafe(T)
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bench("EC Add " & G1_or_G2, T, iters):
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r.sum(P, Q)
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proc mixedAddBench*(T: typedesc, iters: int) =
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T)
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let Q = rng.random_unsafe(T)
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var Qaff: ECP_SWei_Aff[T.F]
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Qaff.affineFromProjective(Q)
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bench("EC Mixed Addition " & G1_or_G2, T, iters):
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r.madd(P, Qaff)
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proc doublingBench*(T: typedesc, iters: int) =
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T)
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bench("EC Double " & G1_or_G2, T, iters):
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r.double(P)
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proc scalarMulGenericBench*(T: typedesc, window: static int, iters: int) =
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const bits = T.F.C.getCurveOrderBitwidth()
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T) # TODO: clear cofactor
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let exponent = rng.random_unsafe(BigInt[bits])
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bench("EC ScalarMul Generic " & G1_or_G2 & " (window = " & $window & ", scratchsize = " & $(1 shl window) & ')', T, iters):
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r = P
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r.scalarMulGeneric(exponent, window)
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proc scalarMulEndo*(T: typedesc, iters: int) =
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const bits = T.F.C.getCurveOrderBitwidth()
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T) # TODO: clear cofactor
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let exponent = rng.random_unsafe(BigInt[bits])
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bench("EC ScalarMul " & G1_or_G2 & " (endomorphism accelerated)", T, iters):
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r = P
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r.scalarMulEndo(exponent)
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proc scalarMulEndoWindow*(T: typedesc, iters: int) =
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const bits = T.F.C.getCurveOrderBitwidth()
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T) # TODO: clear cofactor
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let exponent = rng.random_unsafe(BigInt[bits])
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bench("EC ScalarMul Window-2 " & G1_or_G2 & " (endomorphism accelerated)", T, iters):
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r = P
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when T.F is Fp:
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r.scalarMulGLV_m2w2(exponent)
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else:
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{.error: "Not implemented".}
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proc scalarMulUnsafeDoubleAddBench*(T: typedesc, iters: int) =
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const bits = T.F.C.getCurveOrderBitwidth()
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const G1_or_G2 = when T.F is Fp: "G1" else: "G2"
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var r {.noInit.}: T
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let P = rng.random_unsafe(T) # TODO: clear cofactor
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let exponent = rng.random_unsafe(BigInt[bits])
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bench("EC ScalarMul " & G1_or_G2 & " (unsafe reference DoubleAdd)", T, iters):
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r = P
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r.unsafe_ECmul_double_add(exponent)
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