| News for Fall 2012 |
12/8/12 - I have posted
a sample final exam
and a solution for it,
and a solution hw9-sol.pdf for
HW9. - ELG
12/7/12 - I have posted a new version
of mp11.pdf to add the missing
rho's to the Function Application case - ELG
12/2/12 - mp11.pdf is out and due next
Sunday, December 9. This is the last MP for this semester.
There will be one more HW. - ELG
11/27/12 - HW10 is out and is due next Wednesday,
December 5. - KB
11/27/12 - I have posted a new version
of mp10.pdf to changed the stated
due date to Thursday 29, Nov. I have posted a new version
of hw9.pdf to
change operational semantics to structural operational
semantics. - ELG
11/26/12 - I have posted a new version
of mp10grader.tar.gz to
correct the failure to export print_string to the
interface of micromlint(,Sol). - ELG
11/26/12 - I have posted a new version
of mp10.pdf to correct an
inconsistency in Problem 12. Some x has been changed
to Some f. - ELG
11/12/12 - HW 8 reports have been
e-mailed. Contact us if you have any question. - HS
11/12/12 - Mp9 report have been mailed back,
everyone who lost points in adjustment part is due to
reduce/shift conflict in their code. - LL
11/9/12 - All test suites and solutions for the
MPs and HW through MP8 and HW8 should now be posted. - ELG
11/8/12 - HW 5 reports have been mailed. Please
contact us if you have not yet received it. - HS
11/7/12 - A new version
of mp9.pdf
and mp9grader.tar.gz have
been posted. The pdf clarifies how wild cards are recorded in
declarations, clarifies the desugaring of op and monadic
operators; corrects fun and val rec to take at
least to IDENTs; fixes the incorrect statement about your role with
precedence and associativity, and makes the last problem extra
credit. The new grader directory contains a new solution file
that corrects a discrepancy between the solution and the pdf in
the way \handle is treated. The behavior specified in
the pdf was not what I originally intended, as it is not what is
done the the parent language SML, but it is easier to implement
and is what was specified, so I've changed the solution. - ELG
11/6/12 - a new version of mp9.pdf has been published - HS
11/6/12 - new version of mp9 is updated - LL
11/4/12 - mp9grader.tar.gz has been updated in order to fix a small problem in its solution. - LL
11/2/12 - I will take Hassan's office hours at
4:00pm today (Friday 11/2/2012) in my office SC2112 because
Hassan will be away at a conference. - ELG
10/26/12 - I have posted another version
of mp8grader.tar.gz, this
time with some of the stuff you need, like soution.cmo, in it. - ELG
10/26/12 - I have posted a new version
of mp8.pdf
and mp8grader.tar.gz. I
have fixed a fair number of incompatibilities between the
solution and the pdf (all in the solution). These were mainly in
the problems for strings and comments. I have removed
mp8common.cmi by placing the types it introduced into
mp8common.ml. I have revised the pdf to reflect this change.
None of the basic specifications of the problems have changed,
but I recommend you get a fresh copy of the pdf because many of
the sample outputs will have cahnged, at least some. You also
should replace the footer in your file with the new one in
mp8-skeleton.mll. The original one delivered had inadequate
support for the extra credit problem. - ELG
10/23/12 - TA Kyle Blocher has taken a two week
leave of absence. While he is gone, office hours will be
redistributed between myself and Hassan. For the next two weeks
only, Hassan will have office hours in SC 0207 on Thursday 10/25
and 11/1 at 11:00am - 11:50 am, and Fridays 10/26 and 11/2 at
4:00pm - 4:50pm. Elsa Gunter will have office hours in SC 2112
Mondays 10/29 and 11/5 at 11:30am - 12:20pm, Tuesdays 10/23,
10/30 at 1:00pm - 1:45pm and 3:30pm - 5:00pm, Wednesdays 10/24,
10/31 at 1:30pm - 2:20pm, Thursdays 10/25, 11/1 at 12:30-1:40pm. - ELG
10/22/12 - Solutions
to HW5
and MP6 have been posted. - ELG
10/17/12 - I have posted a revision to
mp6grader.tar.gz. The way
solution.cmo handled the if-then-else case was not in strict
conformance with the pdf. Also, I have rewritten the
proof-canonicalizer to make it more liberal, thus allowing more
proofs to be automatically judged equal to mine. There are still
some ways in which proofs could vary and still arguably be
correct, but I believe that can now only happen if you decide to
reimplement (in a different way) some of the functions we have
given you (such as gen). - ELG
10/16/12 - I have posted a
exams directory. - ELG
10/14/12 - It has come to my attention that
some people were incorrectly docked points for not wrapping pairs in
parentheses in problem 5 on the test. If you believe you were so
graded, you should present your test to me for a regrade within
this next week. - ELG
10/14/12 - After consulting with Hassan, I find
there is a concern that it is proving quite difficult for
students to digetst that larger than previously usualy library of
function offered for use in doing this assignment, and that that
is causing it to take longer to do this assingment than was
expected. Therefore, I have decided to extend the deadline for
ontime handin to Thursday 18 October. - ELG
10/12/12 - I have posted version 1.1
of mp6.pdf to correct the line
overruns and to put the arguments to unify explicitly in
set brackets. I have posted version 1.1
of mp6.pdf to correct the type
given for tl. - ELG
10/2/12 - Solutions to
mp3, hw2,
and mp4 have been posted. - ELG
10/2/12 - I have posted version 1.2
of mp5.pdf to correct the type
given for cps_exp in Problem 5. - ELG
10/1/12 - I may have posted a new version
of mp5.pdf
and mp5grader.tar.gz. I
added annotations to data types for abstract syntax to help link
the constructors to their concrete syntax. I corrected the
example code to use the most recent pretty printer. This effects
the printing of functions and their cps transformations, the
printing of the transformation of applications, and the printing
of the transformation of a val rec declaration. The
description of the freeAndBindingVarsInDec for a val rec
declaration has been corrected. I put an end on each
let-in expression. - ELG
9/27/12 - MP3 reports have been mailed. If you
did not receive the reports, please contact the staff. - LL
9/25/12 - Today in class we will have a lecture
form a guest speaker, Gil Tene, who is CTO and co-founder of Azul
Systems.
TITLE: Understanding Garbage Collection in managed runtimes
ABSTRACT: Garbage Collection is an integral part of application
behavior on managed runtime platforms such as Java and .NET, yet
it is often misunderstood. Since the majority of modern software
development is targeting such platforms it is important for
developers to understand the basic characteristics that govern
memory management behavior, and the actions they can take in
selecting and tuning collector mechanisms, as well as in their
application architecture choices.
In this presentation, Gil Tene (CTO, Azul Systems) reviews and
classifies the various collection techniques available in
mainstream runtime today, focusing on Java runtime as an
example. Following a quick overview of common garbage collection
techniques including generational, parallel, stop-the-world,
incremental, concurrent and mostly-concurrent algorithms, he
defines terms and metrics common to all collectors. Gil then
classifies each major JVM collector's mechanisms and
characteristics and discuss the tradeoffs involved in balancing
requirements for responsiveness, throughput, space, and available
memory across varying scale levels. Gil concludes with some
pitfalls, common misconceptions, and 'myths' around garbage
collection behavior, as well as examples of how some good choices
can result in impressive application behavior.
BIO: Gil Tene is CTO and co-founder of Azul Systems. He has been
involved with virtual machine technologies for the past 20 years
and has been building Java technology-based products since
1995. Gil pioneered Azul's Continuously Concurrent Compacting
Collector (C4), Java Virtualization, Elastic Memory, and various
managed runtime and systems stack technologies that combine to
deliver the industry's most scalable and robust Java
platforms. In 2006 he was named one of the Top 50 Agenda Setters
in the technology industry by Silicon.com. Prior to co-founding
Azul, Gil held key technology positions at Nortel Networks,
Shasta Networks and at Check Point Software Technologies, where
he delivered several industry-leading traffic management
solutions including the industry's first Firewall-1 based
security appliance. He architected operating systems for Stratus
Computer, clustering solutions at Qualix/Legato, and served as an
officer in the Israeli Navy Computer R and D unit. Gil holds a
BSEE from The Technion Israel Institute of Technology, and has
been awarded 28 patents in computer-related technologies. - ELG
9/22/12 - MP2 reports have been mailed back in
two emails. If you did not receive the reports, please contact
the staff. - LL
9/20/12 - I have posted a revision
for mp4.pdf that fixes the overrun
in Problem 6b. - ELG
9/20/12 - HW1 report has been mailed back. If
you did not receive the report, please contact the staff - LL
9/19/12 - I have posted a revision
for mp4.pdf. In Problem 3, tne
base case should have been when n is less than m
rather than the other way around, as I first had it. - ELG
9/19/12 - I have posted the solution and the
full tests for MP2. - ELG
9/10/12 - The web server for our class
currently refuse to serve files without extensions and files with
a .ml extension. So, I have copied mp1-sol.ml and tests-full to
mp1-som.ml.txt and tests-full.txt respectively, and added links
for these to the webpage. You may want to strip off the .txt
when saving the files to your own machine. - ELG
9/7/12 - I have posted the solution and the
full tests for MP1. - ELG
9/7/12 - I may have posted a new version
of mp2grader.tar.gz. The
solution file before had various optimizations to try to prevent
redundant search. I have not studied it carefully (it was not
mine), but I have replaced it with my solution. My solution is
straightforward, and in general will do redundant searches.
Directly, or indirectly, it uses six auxiliary functions, one
being the solution to Problem 8, two others being auxiliary
functions for that problem, and 3 being implementations of
library functions (you could just use library functions directly). You
are not required to give the most efficient algorithm for these
problems, merely one that satisfies the specification. Of
course, the human grader who reads your code may choose to
point out needless inefficiencies, but you should not lose
points, so long as you are compliant with the specification - ELG
9/5/12 - I may have posted a new version
of mp2grader.tar.gz. I
believe I may have include an incorrect early version of the
solution. - ELG
9/3/12 - I have posted a new version
of HW1. Program point 6 was
mislocated. - ELG
9/1/12 - HW1 has
been release a few days early, in case anyone wants to get an
early start. It will be due on 9/11/12. The basic definitions
you need were covered in class on Thursday, but we will spend
more time on these ideas on Tuesday. - ELG
8/29/12 - I have posted another new version of
mp1grader.tar.gz. After
emphasizing that you all need to put open MP1common at
the tops of your files, I absentmindedly left if out of mine. I
also fixed teh double space in Problem 5. The new tarball
is there now. My apologies for the iterations. - ELG
8/29/12 - I have posted a new version of
mp1grader.tar.gz. I needed
to added a period to the solution of Problem 1. - ELG
8/28/12 - MP1
has been posted. Because I failed to cover quite enough material
today, HW1 will be postponed for a week. In general, I will not
announce when an MP or HW is posted. They will be posted weekly on
Tuesdays before midnight, due the following Tuesday (except if it
is an exam day). - ELG
8/28/12 - This semester, we will use Piazza
for the class newsgroup. Participation in this not required, but
may be helpful. If you wish to participate in this newsgroup,
please sign up using this
portal. - ELG
8/28/12 - Welcome to CS421, Fall 2012. This
page will be the main bulletin board for the course, and hence is
always under construction. Please check it frequently. - ELG
|
|
| Class Schedule |
Lecture:
Tues, Thurs 2:00pm - 3:15pm
1404 SC
|
| Staff |
| Professor |
|---|
Elsa Gunter
Email: egunter@illinois.edu
Office: 2112 SC
Phone: 265-6118
Hours: Mon 11:30am-12:20pm, Tues 3:30pm - 4:20 pm,
Thurs 12:30pm - 1:40pm
Also by appointment
|
| Teaching Assistants |
|---|
Kyle Blocher
Email: blocher@illinois.edu
Office: 0207 SC
Hours: Tues 1:00pm - 1:50pm, Thurs 11:00am - 11:50am -->
|
Hassan Samee
Email: samee1@illinois.edu
Office: 0207 SC
Hours: Wed 1:30pm - 2:20pm, Fri 4:00pm - 4:50pm
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