jedbrown

;; With prefetch and NT stores:

0000000000401608 <main+0xac8> add    esi,0x4
000000000040160b <main+0xacb> add    rcx,0x20
000000000040160f <main+0xacf> cmp    esi,0x7a1200
0000000000401615 <main+0xad5> je     00000000004016a9 <main+0xb69>
000000000040161b <main+0xadb> mov    rax,QWORD PTR [rsp+0x748]
0000000000401623 <main+0xae3> movapd xmm0,xmm3
0000000000401627 <main+0xae7> mulpd  xmm0,XMMWORD PTR [rax+rcx*1]
000000000040162c <main+0xaec> movapd xmm1,XMMWORD PTR [rax+rcx*1+0x10]

jedbrown

We couldn’t find that file to show.

jedbrown

#!/usr/bin/env python3

s = set()
a = range(3)
s.update(a)
print(list(a))                  # [0, 1, 2]

b = map(lambda x:10+x,a)
print(list(b))                  # [10, 11, 12]
s.update(b)

jedbrown

#!/usr/bin/env python

def withvars(f):
    def wrapper(self,*args,**kwargs):
        tmp = self.vars.copy()
        tmp.update(kwargs)
        return f(self,*args,**tmp)
    return wrapper
def withvars_censor(f):
    def wrapper(self,*args,**kwargs):

jedbrown

# Oregonator: stiff 3-variable oscillatory ODE system from chemical reactions,
# problem OREGO in Hairer&Wanner

import sys, petsc4py
petsc4py.init(sys.argv)

from petsc4py import PETSc

class Orego(object):
    n = 3

jedbrown

## Julia implementation of solving Poisson on a square grid using Chebyshev collocation
# julia> load("logg.jl")
# julia> loggProfile(10000)
# error: 3.310154100518143e-7
# Average time (us): 132.39421844482422

function logg(m)
    (D,xb) = cheb(m+1) # Chebyshev differentiation matrix and nodes
    D = 2*D; xb = 0.5 + 0.5*xb   # Remap to interval [0,1]
    D2 = -(D*D)[2:end-1,2:end-1] # Negative 1D Laplacian, with Dirichlet BCs

jedbrown

#!/usr/bin/env python

from subprocess import Popen, PIPE
import sys, threading

# Each stage that we implement in Python. If processing binary data, we would
# read incrementally using input.read(4096), for example. The output file must
# be closed to flush the pipeline and allow it to clean up properly.
def writer(output):
    for line in open('/usr/share/dict/words'):

jedbrown

CC = clang
CFLAGS = -Wall -Wextra -pedantic -std=c99 -O1 -g  # -O1 or higher needed

a.out : a.o xrank.o
	$(CC) -o $@ $^

jedbrown

cmake_minimum_required(VERSION 2.8)
project(foo)

add_library(foo foo.cc)
target_link_libraries(foo ${DEP_LIBS})

add_library(bar bar.cc)
target_link_libraries(bar foo)

jedbrown

Requests for colloquium dates

⇨ Fall 2018

Archive:

• Spring 2018 Calendar
• Fall 2017 Calendar