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| Moed C | | Students, who are emtitled to Moed C please contact Leonid till the end of this week (16.05) |
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| Created on 10/5/2009, 14:51:21 |
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| Moed B solution | | Moed B solution is available in the Material section. |
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| Created on 28/4/2009, 16:19:59 |
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| Exam B grades | Exam B grades are now published. The exams will be returned to Mazcirut tomorrow.
The final grades were calculated using the following formula:
ExamB_Factor = ExamB+5
(ExamB_Factor<50)?ExamB_Factor:round(0.6*ExamB_Factor+0.07*HW1+0.13*HW2+0.13*HW3+0.07*HW4)
Appeals on the exam can be submitted on a standard appeals form to Leonid's mail box on the 5th floor of Taub. The last day for appeals is 10/05/2009.
A few words about an appeal:
1. Please check your exam very well before appealing. Pay attention that we will recheck the whole exam. It may cause a decrease in final grade as well.
2. If you want to ask me (Leonid) any question before you appeal you can send to me the question with the exam attached.
3. Please don't forget to use official sheet. Otherwise we will not be able to change your grade.
4. Also please attach to the appeal the whole exam (and not only the question you want to appeal on). We will not check the appeal otherwise.
5. In some questions we gave partial grade even for a wrong answer. We will not accept any appeal on the amount points that were reduced in such cases.
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| Created on 26/4/2009, 16:50:08 |
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| Moed B time and place | Moed B will be held on Sunday 19.04 at 17:30 Ullman 702-705.
Time extensions: Ullman 703 |
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| Created on 17/4/2009, 20:12:07 |
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| Reception hours before Moed B. | As you have probably noticed Technion will be closed for a week and a half before moed B. So, we can not give any reception hour before moed B. I (Leonid) will give a reception hour on Monday (06.04) at 12:30 at ISL lab. However, based on my experience it is to early and most of you have not started preparing to the exam yet. Therefore, we suggest that you use the course email (cs234120 cs.technion.ac.il) to ask questions (regarding the material or the exam questions). If you have any problem or request feel free to contact me.
We are sorry for the inconvenience. |
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| Created on 2/4/2009, 10:02:39 |
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| Moed A appeales | | Moed A appeales have been checked and returned to the secretary. The updated grades are in the GR system and have also been passed to the secretary.
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| Created on 19/3/2009, 12:50:40 |
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| HW4 appeals | | The grades of HW4 appeales are available now in GR++ system. |
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| Last updated on 19/3/2009, 12:50:50 |
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| Hw4 appeal session | Hw4 appeal session will be held on Wed. 18.03.2009 at 16:30-18:30 at Taub 312.
Each group (that have sent an email to Leonid) will have a 10-min time slot to fix their code (slots registration list will be on the door). That means you should go over your homework before the session, in order to refresh your memory. Try to find your bugs before the session, according to the published automatic tests description. Please pay attention that we will not allow significant code modifications.
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| Created on 11/3/2009, 17:04:16 |
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| Exam A grades and appeals | Exam A grades are now published and the exams have been returned to Mazcirut.
The final grades were calculated using the following formula:
(ExamA<50)?ExamA:round(0.6*ExamA+0.07*HW1+0.13*HW2+0.13*HW3+0.07*HW4)
You can find the solution of the moed A in the material section of the course website.
Appeals on the exam can be submitted on a standard appeals form to Leonid's mail box on the 5th floor of Taub. The last day for appeals is 10/03/2009.
A few words about an appeal:
1. Please check your exam very well before appealing. Pay attention that we will recheck the whole exam. It may cause a decrease in final grade as well.
2. If you want to ask me (Leonid) any question before you appeal you can send to me the question with the exam attached.
3. Please don't forget to use official sheet. Otherwise we will not be able to change your grade.
4. Also please attach to the appeal the whole exam (and not only the question you want to appeal on). We will not check the appeal otherwise.
5. In some questions we gave partial grade even for a wrong answer. We will not accept any appeal on the amount points that were reduced in such cases.
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| Created on 24/2/2009, 17:51:40 |
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| Student with id 200458743 | | Student with id 200458743 please conatct Leonid ASAP |
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| Created on 24/2/2009, 12:20:17 |
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| Hw4 explanations | | Hw4 explanations are available in the Assignment section on the website. |
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| Last updated on 23/2/2009, 23:45:29 |
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| HW4 grades are published now | HW4 grades are published now (see the course website, HW assignments section). The dry part will been returned today.
We will upload soon the description of the tests. There also a solution to dry questions available.
We will hold special appealing session next week. You can appeal both on dry and wet parts. The purpose of the wet part appealing is to fix small bugs in your implementation that caused failures of many automatic tests. We will not accept changes that fix 1-2 tests (meaning if your changes fix1 or 2 tests your grade will remain unchanged). The exact date and location of the appeal session will be announced soon.
ANy group that is willing to participate has to dend me an email till Sat. evening.
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| Created on 23/2/2009, 10:52:53 |
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| Hw4 solution | | Hw4 solution is available in the assignments section. |
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| Created on 20/2/2009, 17:12:46 |
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| Unsolved versions of the exams | | Due to multiple requests I have added the unsolved versions of the exams that were published before (in the same archive you can find an additional directory with the unsolved exams).
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| Created on 20/2/2009, 17:12:06 |
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| Erez's reception hour | Because of personal reasons Erez couldn't attend his reception hour today.
He will give a reception hour on Sunday at 10.30.
We are sorry for the inconvenience. |
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| Created on 17/2/2009, 11:39:04 |
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| Leonid's session location change | | Leonid's session tomorrow (Wednesday) will be held at Taub 9 and not at Taub 7 as announced previously. |
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| Created on 17/2/2009, 08:54:10 |
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| Leonid's question solving session | | Leonid will solve questions from the prvious exams on Wed 10:30-12:30 at Taub 7. Pay attention that the time of this session has been changed (previously it was announced that the session will start at 12:30). |
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| Created on 16/2/2009, 15:42:58 |
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| Erez's reception hour | | Erez will give a reception hour tomorrow at 10:30. |
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| Created on 16/2/2009, 15:41:08 |
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| Exams for the students who did a long miluim service | | Following the directives from the faculty, all the students who did a long miluim service are entitled to attending MOED A of the following semester when they are unable to attend one MOED in the current semester. All the students entitled to this please register by sending me (Leonid) an email. Please send me the approval of your miluim service |
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| Created on 15/2/2009, 18:54:48 |
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| Moed A reception hours: | Alex: Monday 16.02, 9:30-10:30
Raja: Thursday 19.02, 13:00-14:00
Sagi: Thursday 19.02, 14:00-15:00
Leonid: Sunday 22.02 13:30-14:30
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| Created on 15/2/2009, 10:50:01 |
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| Exams from previous semesters and some useful information | First of all, the exam will be with open material.
I have uploaded achieve with 18 solved exams from previous semesters (see Material section).
There are 2 videos (http://video.technion.ac.il/Courses/OPSYS_Q.html) where I solve some questions from the exams. On the course site you can find the power point presentations that are used in the videos.
On Wednesday at 12:30 I will hold special session, where I will solve the questions from the exams (the questions that do not appear in the videos). The exact location of the session will be announced later. If you want some question from the exam to be solved during the session, please send it to me.
In addition we will hold special reception hours before the exam. The exact time and location will be announced later.
The last thing, if you have a question that you want to ask you can also do it using the email. Please DO NOT use our personal emails. You should use the course email instead (cs234120cs.technion.ac.il). If you are writing in Hebrew please write your email in Word and attach the file to your email. If you are asking something regarding any question from an exam from previous years please attach the whole question to your email.
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| Created on 13/2/2009, 10:31:43 |
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| Hw2 & Hw3 appeals grades | | Hw2 & Hw3 appeals grades are have been published. The modified files are available in the Assignment section. The grades of Hw2 & Hw3 are available now in GR++ system as well. If your grade has not been updated please contact me (Leonid).
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| Created on 12/2/2009, 12:23:28 |
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| Last lecture slides are available | | Last lecture slides are available on the website. We are sorry for such a late notification. |
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| Created on 8/2/2009, 15:19:52 |
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| Hw2 and hw3 appeals | Hw2 and hw3 appeal sessions will be held on Wed. 11.02.2009 at 12:30. Hw2 appeal session will take place at Taub 312 and hw3 appeal session will take place at ISL lab on the first floor.
Anyone who wants to appeal (on any HW) for please contact Leonid by e-mail until Tue noon. Please specify on which HW you want to appeal. Each group will have a 10-min time slot to fix their code (slots registration list will be on the door). That means you should go over your homework before the session, in order to refresh your memory. Try to find your bugs before the session, according to the published automatic tests description. Please pay attention that we will not allow significant code modifications.
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| Created on 8/2/2009, 10:00:13 |
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| Grades files updated. | I have updated grades files. There are some students that have a mistakes in their ids – please check that now it is ok. Also pay attention that the IDs are extracted automatically based on the IDs you enter during the hw submission. Please make sure next time you type the correct IDs.
In addition Yonit tried to fix some compilation problems in hw3 (for the submission that failed during the compilation) . Some grades, therefore, have been updated.
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| Created on 5/2/2009, 21:14:28 |
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| HW2 and HW3 grades are published | HW2 and HW3 grades are published now (see the course website, HW assignments section). The dry part of HW2 has been returned to the Mazcirut. The dry part of HW3 will been returned today.
In the assignments section you can find the detailed grades for all tests and the description of the tests themselves. There also a solution to dry questions. For Hw3 I added a code that explains the idea of implementation of the most difficult part of the assignment.
Pay attention that the maximum grade of hw2 and hw3 was more then 100 points. So, if you scored more then 100 your final grade will be 100.
We will hold special appealing session next week. You can appeal both on dry and wet parts. The purpose of the wet part appealing is to fix small bugs in your implementation that caused failures of many automatic tests. We will not accept changed that fix 1-2 tests. The exact date and location will be announced soon.
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| Created on 5/2/2009, 11:56:27 |
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| Erez's reception hour this week | | Due to personal reasons Erez's reception hour this week are canceled. You can contact him by email or come to any TA. |
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| Created on 3/2/2009, 06:59:26 |
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| Complementary lecture | | As there is no studies on 10.02 (the election day) Erez will give a complementary lecture on Sunday 08.02 16:30 at Taub 2. See the event section of the website. |
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| Created on 27/1/2009, 18:09:08 |
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| Leonid's complementary tutorial | | As there is no studies on 10.02 (the election day) Leonid will give a complementary tutorial on 28.01 12:30 at Taub 7. The Material is File Systems (tutorial 14). See the event section of the website.
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| Created on 27/1/2009, 18:05:27 |
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| Modules example | | The module implementation example can be found in the Material section |
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| Created on 25/1/2009, 17:31:09 |
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| Zav 8 | | All the students that have been drafted with zav 8 please email (or approach) Leonid ASAP. |
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| Created on 22/1/2009, 21:35:59 |
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| The fourth assignment | | The fourth assignment has been published. See the assignments section on the course website. Due date is Thursday 12/02/2009, 12:30 noon. |
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| Created on 22/1/2009, 21:30:01 |
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| Sagi's reception hour this week is canceled. | | Because of the personal reasons Sagi's reception hours this week are canceled. You are welcome to come to any other TA. |
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| Created on 12/1/2009, 20:49:19 |
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| A change in tutorials order | | We have changed the order of the tutorial to be consistent with the order of the lectures. The next (10-th) tutorial will be Modules, then 3 tutorials about Virtual Memory and the last tutorial will be File Systems. The updated slides (in the correct order) are available in the Material section.
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| Created on 7/1/2009, 12:10:22 |
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| Hw1 appeals grades | | Hw1 appeals grades are have been published. The modified file is available in the Assignment section. The grades of Hw1 are available now in GR++ system. If your grade has not been updated please contact me (Leonid). |
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| Created on 1/1/2009, 14:59:50 |
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| Student with id 31814593 | | Student with id 31814593 please contact Leonid. |
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| Created on 1/1/2009, 14:55:31 |
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| The third assignment | | The third assignment has been published. See the assignments section on the course website. Due date is Thursday 22/01/2009, 12:30 noon. Submissions should be done in groups of three. You can use the find a partner section on the website.
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| Created on 1/1/2009, 13:17:09 |
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| Working at the PC farm | If you are working at the PC farm please pay attention to the following issues:
1. Work only on the room 18. We have checked the Linux images in this room they are all clean and VMWare stations works fine (if there is any problem let ne know).
2. Do not use the Linux image in the C:/temp folder that was left by other groups. These images are modified by other students and may contain unnecessary files and bugs. Replace it each time with the clean image from c:\vm\linux-234120 (you can't run the image from c:\vm\linux-234120 without copying it first).
3. The PCs in other rooms have VMWare Player installed. The images there do not fit the player and you will not have the Shared Folders - you can use disc on key. Currently the system are checking the possibility to fix this problem. |
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| Created on 29/12/2008, 23:51:53 |
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| Hw1 appeal session | The hw1 appeal session will be held on Tue. 30.12.2008 at 14:30 at Alex's office (Taub 533). See the event section of the website.
Anyone who wants to appeal for HW1 please contact Yonit by e-mail until Sunday noon. Each group will have a 10-min time slot to fix their code (slots registration list will be on the door). That means you should go over your homework before the session, in order to refresh your memory. Try to find your bugs before the session, according to the published automatic tests description. |
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| Created on 24/12/2008, 20:37:53 |
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| Hw2 postponed | | Because of the “midterm period” we decided to postpone the deadline of hw2 to Sunday 04.01.2009 12:30 (noon). However, hw3 will be published on Thursday 01.01 as scheduled and the deadline will be 22.01 (3 weeks). Pay attention that we will not give a postponement for hw3, simply because we don’t have any spare time in this semester. Also, hw3 usually is the longest one in the semester. Therefore, we strongly recommend you to finish hw2 in time and start working on hw3 right after it is published.
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| Created on 24/12/2008, 20:04:09 |
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| HW1 grades are published | HW1 grades are published now (see the course website, HW assignments section). The dry HWs have been returned to the Mazcirut.
In the assignments section you can find the detailed grades for all tests and the description of the tests themselves.
We will hold special appealing session. You can appeal both on dry and wet parts. The purpose of the wet part appealing is to fix small bugs in your implementation that caused failures of many automatic tests. The exact date and location will be announced soon
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| Created on 24/12/2008, 19:53:00 |
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| Alex's reception hour on Thursday 01.01.09 | Alex's reception hour on Thursday 01.01.09 will not be held. Instead, he will
hold a reception hour on Wednesday 24.12.08 at 11:30.
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| Created on 21/12/2008, 15:17:40 |
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| Alex's tutorial on Thursday 01.01.09 | Alex's tutorial on Thursday 01.01.09 is cancelled. As was decided in class, the complementary tutorial will be on Wednesday 24.12.08 12:30 in Taub 4 (see events section).
Note that the regular tutorial on Thursday 25.12.08 will be held as usual.
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| Created on 18/12/2008, 21:05:57 |
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| The second assignment | The second assignment has been published. See the assignments section on the course website. Due date is Thursday 01/01/2009, 12:30 noon. Submissions should be done in groups of three. You can use the find a partner section on the website.
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| Last updated on 11/12/2008, 01:01:26 |
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| Student with ID 317983104 | | Student with ID 317983104 or one of his partners please contact Leonid ASAP. |
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| Created on 9/12/2008, 00:33:32 |
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| Hw1 deadline | | When hw1 was published the submition date was wrongly set to 12.12 instead of 11.12. We will not change itno, so you can submit the hw till 12.12.2008 12:30. However, hw2 will be published on 11.12.2008 |
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| Created on 7/12/2008, 21:44:10 |
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| What are asmlinkage and __init? | 1. The asmlinkage tag is one other thing that we should observe about this simple function. This is a #define for some gcc magic that tells the compiler that the function should not expect to find any of its arguments in registers (a common optimization), but only on the CPU's stack. Recall our earlier assertion that system_call consumes its first argument, the system call number, and allows up to four more arguments that are passed along to the real system call. system_call achieves this feat simply by leaving its other arguments (which were passed to it in registers) on the stack. All system calls are marked with the asmlinkage tag, so they all look to the stack for arguments. Of course, in sys_ni_syscall's case, this doesn't make any difference, because sys_ni_syscall doesn't take any arguments, but it's an issue for most other system calls. And, because you'll be seeing asmlinkage in front of many other functions, I thought you should know what it was about.
2. __init tells GCC to put the function in a special section. These functions are only used during booting, and are removed from memory after boot.
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| Last updated on 2/12/2008, 19:37:21 |
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| Makefile | | In the Material section (under Additional material) I have uploaded a tutorial from the Introduction to System Programming course. It explains hoe to write a makefile. Please read pages 10-18. |
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| Created on 26/11/2008, 22:52:30 |
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| Erez's reception hour next week | Due to parking permits Erez was not able to come in time to his reception hour this week.
Therefore, for next week only, he will extend the reception hours to 1.5 hours, Tuesday 9:00-10:30. |
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| Created on 25/11/2008, 19:23:49 |
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| Course email problem | Dear students.
It seems that there were some problem with the course emal address (cs234120cs.technion.ac.il). I have made some corrections, and it works fine now. If you have sent any email regarding Hw1 please resend it.
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| Created on 25/11/2008, 18:48:40 |
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| First assignment | | The first assignment has been published. See the assignments section in the course website. Due date is Thursday 11/12, 12:30 noon. Submissions should be done in groups of three. You can use the find a partner section in the website. |
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| Created on 20/11/2008, 13:59:37 |
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| Reminder: Linux demo | | During this week each TA will hold special reception hours in order to provide a demonstration of working with Linux OS. You can see the days and hours of such reception hours in the 'Events' section on website. The location: PC farm.
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| Created on 17/11/2008, 15:37:45 |
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| The new course number is 234123 | | The upgrade to 4.5 points for OS was finally approved and the course number has been changed to 234123. So, all students were transferred to 234123. Pay attention that you no longer should be registered to 234120 but to 234123. There is no change in the course schedule or hw plans. |
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| Created on 16/11/2008, 11:50:21 |
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| Lecture 1 slides | | The slides of lecture one have been updated. |
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| Last updated on 12/11/2008, 10:11:35 |
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| Preliminary Assignment has been published | A preliminary assignment has been published in the homework section.
Although this assignment is not for submission, you are recommended to finish it until 19.11. The assignment will prepare you for working with VMware, and it includes important details that you will need for performing the next assignments in the course. The "VMware project" (including Linux OS) CD can be found in the CS library (s.n.2265711). The project that is on CD is for VMware station (which is not free software). If you don't have VMware station, you can download the VMware player 2. from WMware Inc website () If you use the player you have to make small modifications to the project. In order do add shared folders in VMware player 2.0 add the following text to Linux-234120.vmx:
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sharedFolder.maxNum = "1"
sharedFolder0.present = "TRUE"
sharedFolder0.enabled = "TRUE"
sharedFolder0.readAccess = "TRUE"
sharedFolder0.writeAccess = "TRUE"
sharedFolder0.hostPath = "PATH ON THE HOST, E.G. C:\Temp"
sharedFolder0.guestName = "NameOfFolderAsSeenByTheGuest"
sharedFolder0.expiration = "never"
isolation.tools.hgfs.disable = "FALSE"
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More details about VMware can be found in the FAQ section in the website.
Assignments in the course should be submitted in groups of 3, and we encourage you to form the groups now, and not wait for the first (real) assignment. You can use the "Find a partner" section in the website for this cause.
Please pay attention that when you are installing VMware on the PC that is connected to the network from dormitories you should read carefully (VERY carefully) how to install it and to make all the needed configuration changes for the networking (see the last page of the assignment). If you don't do it the right way you PC will act as if it is DHCP server. That will prevent you and other students to connect to the network.
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| Last updated on 12/11/2008, 10:11:23 |
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| Some important announcements | Dear Students,
Before the beginning of the semester we have several important announcements.
1. Information regarding lectures and tutorials hours and locations is now available on the 'Staff' section in the course website. Specifically please pay attention that Leonid's tutorial on Tuesday will be at Taub 7 and not at Taub 8 as it appears on the UG site.
2. The tutorial on Raja's Monday during the first week (10.11.2008) will not take place because of Rabin memorial ceremony. The complementary tutorial will be given on 12.11 at 12:30 at Taub 7 (see 'Events' section).
3. During the second week each TA will hold special reception hours in order to provide a demonstration of working with Linux OS. You can see the days and hours of such reception hours in the 'Events' section on website.
4. In the 'Syllabus' section there is a document describing hw regulations (and some extra tips). Please go over it. You can find the cover page that has to be used for the Hws in the 'Assignments' section.
Good Luck! |
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| Created on 4/11/2008, 23:24:37 |
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| Welcome to course 234120 - Operating Systems | Shalom all,
and good luck in the course!
Course Staff. |
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| Created on 4/11/2008, 15:24:22 |
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Technion - Israel Institute of Technology 
