#!/usr/bin/env python
+# Copyright (c) 2010-2011, 2014. The SimGrid Team.
+# All rights reserved.
+
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the license (GNU LGPL) which comes with this package.
import sys
from math import sqrt
##---------------------------------------------------------------------
## calibrate : output correction factors, c_lat on latency, c_bw on bw
## such that bandwidth * c_bw = bw_regr, latency * c_lat = lat_regr
-<<<<<<< HEAD
-## where bw_obs and lat_obs are the values approximatong experimental
-=======
-## where bw_regr and lat_regr are the values approximatong experimental
->>>>>>> 496787ff18b9d4034acba3c5c68dc54ea416e887
+## where bw_regr and lat_regr are the values approximating experimental
## observations.
##
## param links number of links traversed during ping-pong
assert len(sizes) == len(timings)
if len(sizes) < 2:
return None
-<<<<<<< HEAD
# compute linear regression : find an affine form time = a*size+b
-=======
- # compute linear regression : find an affine form a*size+b
->>>>>>> 496787ff18b9d4034acba3c5c68dc54ea416e887
S_XY = cov(sizes, timings)
S_X2 = variance(sizes)
a = S_XY / S_X2
b = avg(timings) - a * avg(sizes)
-<<<<<<< HEAD
# corresponding bandwith, in byte/s (was in byte/us in skampi dat)
bw_regr = 1e6 / a
# corresponding latency, in s (was in us in skampi dat)
print("\t if ({0:d} {1} size && size {2} {3:d}) ".format(lb,lb_cmp,ub_cmp,ub))
print("\t return({0});" . format(retval))
-=======
- # corresponding bandwith, in s (was in us in skampi dat)
- bw_regr = 1e6 / a
- # corresponding latency, in s (was in us in skampi dat)
- lat_regr = b*1e-6
- #print("\nregression: {0} * x + {1}".format(a,b))
- #print("corr_bw = bw_regr/bandwidth= {0}/{1}={2} lat_regr/(lat_xml*links)={3}/({4}*{5}))".format(bw_regr,bandwidth,bw_regr/bandwidth,lat_regr,latency,links))
- # return correction factors c_bw,c_lat
- return bw_regr/bandwidth, lat_regr/(latency*links)
->>>>>>> 496787ff18b9d4034acba3c5c68dc54ea416e887
##-----------------------------------------------------------------------------------------------
## main
for lim in limits:
correc = calibrate(links, latency, bandwidth, sizes[low:lim + 1], timings[low:lim + 1])
if correc:
-<<<<<<< HEAD
# save interval [lb,ub] correction, regression line direction and origin
- # and corresponding correction factors for bw and lat resp,
+ # and corresponding correction factors for bw and lat resp.
(dircoef,origin,factor_bw,factor_lat) = correc
factors.append( (sizes[low],sizes[lim], dircoef, origin, factor_bw,factor_lat) )
print("Segment [%d:%d] --Bandwidth factor=%g --Latency factor=%g " % (sizes[low], sizes[lim], factor_bw,factor_lat))
# print correction factor for bandwidth between segments
joinseg.reverse()
-print("\t /* ..:: inter-segment corrections ::.. */\n");
+print("\n\t /* ..:: inter-segment corrections ::.. */");
inx=len(joinseg)-1
while inx>=1:
(x0,y0) = joinseg[inx]
for (lb,ub,a,b,factor_bw,factor_lat) in factors:
c_code_print(lb,ub,factor_lat,True,True)
-print("\t /* ..:: inter-segment corrections ::.. */\n");
+print("\n\t /* ..:: inter-segment corrections ::.. */");
while joinseg:
(x0,y0) = joinseg.pop()
(x1,y1) = joinseg.pop()
factor_join_lat = b / (latency*links)
c_code_print(x0,x1,factor_join_lat,False,False)
-
-=======
- # save interval [lb,ub] and correction factors for bw and lat resp.
- factors.append( (sizes[low],sizes[lim], correc[0], correc[1]) )
- print("Segment [%d:%d] --Bandwidth factor=%g --Latency factor=%g " % (sizes[low], sizes[lim], correc[0], correc[1]))
- low = lim + 1
-
-print("\n/**\n *------------------ <copy/paste C code snippet in surf/network.c> ----------------------")
-print(" *\n * produced by: {0}\n *".format(' '.join(sys.argv)))
-print(" *---------------------------------------------------------------------------------------\n **/")
-print("static double smpi_bandwidth_factor(double size)\n{")
-for (lb,ub,factor_bw,factor_lat) in factors:
- print("\t /* case %d Bytes <= size <=%d Bytes */" % (lb,ub))
- print("\t if (%d <= size && size <= %d) {" % (lb,ub))
- print("\t return(%g);" % (factor_bw))
- print("\t }")
print("}\n")
-print("static double smpi_latency_factor(double size)\n{")
-for (lb,ub,factor_bw,factor_lat) in factors:
- print("\t /* case %d Bytes <= size <=%d Bytes */" % (lb,ub))
- print("\t if (%d <= size && size <= %d) {" % (lb,ub))
- print("\t return(%g);" % (factor_lat))
- print("\t }")
->>>>>>> 496787ff18b9d4034acba3c5c68dc54ea416e887
-print("}\n")
-print("/**\n *------------------ </copy/paste C code snippet in surf/network.c> ---------------------\n **/")
+print("\n/**\n *------------------ <copy/paste C code snippet in surf/network.c> ----------------------\n **/")
