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--- midd:traffic_scheduling:project_log [2009/04/24 16:20]
afbarnard Added project log entries for past 2 weeks from my own notes
+++ midd:traffic_scheduling:project_log [2009/05/13 18:10]
afbarnard typo: not -> now for 04/10 entry
@@ Line 126: / Line 126: @@
 ==== 04/10 ====
-I was in the process of doing this (see above) when I could not reinstall the Sprint drivers. Looking for a new set of drivers, I found a completely revamped set from Sprint. Installing, and guess what - the NDIS adapter can not be directly seen by winpcap. Successfully sending and receiving via our software over the Sprint card to our server.
+I was in the process of doing this (see above) when I could not reinstall the Sprint drivers. Looking for a new set of drivers, I found a completely revamped set from Sprint. Installing, and guess what - the NDIS adapter can now be directly seen by winpcap. Successfully sending and receiving via our software over the Sprint card to our server.
 ==== 04/12 ====
@@ Line 202: / Line 202: @@
 AB - Prepare presentation for meeting with Suman.
+PK - Actually early 04/25. Started from scratch last night. Finished a new server - even added graphing GUI. Architected class hierarchy and implemented round robin scheduler (since it does not require any actual capture or analysis) as a means of exercising the class hierarchy. I like it so far. Very pleased. This screen grab shows the server receiving from a SuperTcpClient with 2 (simulated) adapters with the round robin scheduler. The graph is the last 60 seconds. The dip is the current second.
+{{:midd:traffic_scheduling:server_snap.jpg|}}
+==== 04/25 ====
+PK - Decided to take a chance to write super-TCP. Came up with plan. Spent 24 hours straight on it. Concluded it is too big for this late in the semester. But will continue thinking about it as developing a framework for this future work would make a nice addition to the project's report.
+AB - Get SharpPcap working on Linux with Mono. Correspond with Perry about project focus, design, cross-platform compatibility.
+==== 04/27 ====
+PK, AB - several hour meeting came up with concrete plan for finishing this project.
+PK - started over again.
+==== 04/28 ====
+PK - experimented with blocking and non-blocking socket member. With non-blocking I crashed my computer every time when I hammered the adapter but did not do this with blocking set. Flag must do something :). Later this day: First fully functioning version of new client / server.
+PK, AB - meet for an hour for code review, status.
+PK - a few more hours in. I added three more transmission "models" to the client: load,burst and random. I have replaced the processor based clock and am now using DateTime.Now.Ticks to make the code portable to Linux. This means same-machine/same-subnet RTTs are 0. I added the adapter cumulative loss/ooo counts. I added timestamps in acks. Have conclusive evidence that the blocking socket flag does nothing in UDP. Forced to put in Thread.SpinWait every N bulk transmissions so that we don't spill so many segments on the floor, even before they've hit the wire.
+AB - Clean up and commit new code.
+==== 04/29 ====
+PK - Added OpenGL "GUI" to client.
+AB - Look into C# timer resolution issue. Create demo timer application.
+==== 04/30 ====
+PK - Added Jacobson/Karels Algorithm RTT estimation to adapter code. It furnishes an established idea of current RTT for use by schedulers. Jacobson/Karels Algorithm specification doesn't discuss adding to estimated timeout any effect of actual timeouts. So, I added a penalty to the estimated timeout if an actual timeout occurs (added 0.1 seconds to estimated timeout). Temporarily, I connected the suggested timeout value to the actual timeout value and it worked VERY well.
+PK - Later. Improved GUI graphing. Realized there was no way to zero bins for seconds in which no segments were sent. New code has additional benefit of scrolling in new data.
+==== 05/04 ====
+PK - Removed GUI graphing to make it easier to port to Mono. With a little more tinkering with the Tao framework (which IS Mono compatible), the GUI code could be added back in.
+==== 05/05 ====
+AB, PK - Meet
+AB - Write link oracle. Try to run with Tao/OpenGL. Advise removing Tao. Tidy repository.
+==== 05/06 ====
+PK - Implemented Spaghetti scheduler. Happy birthday to me.
+AB - Write link oracle.
+==== 05/07 ====
+PK - Implemented random scheduler.
+==== 05/08 ====
+AB - Logging of network characteristics, scheduling decisions, network activity, etc. for use in experiments.
+==== 05/09 ====
+PK - Implemented experiment duration timer for Aubrey.
+AB - Logging.
+==== 05/10 ====
+PK - Made code tweaks for Aubrey. Began formal presentation development.
+AB - Logging. Fix adapter class. Fix time stamps. Fix link oracle. Proportional scheduler.
+==== 05/11 ====
+AB - Revise command line arguments to add options necessary for experiments.
+PK, AB - met for 6 hours. Made a lot of progress. Reviewed formal presentation. Conceived more fully realized BK Scheduler - an idea that we have bandied back and forth for a long time.
+==== 05/12 ====
+PK - starting at 3:30 AM to 9:30 AM - really formalized BK.
+AB, PK - Met for 8 hours to implement BK scheduler, run experiments, fix bugs, rerun experiments, finish presentation.
+==== 05/13 ====
+AB, BK - Give partial project presentation. Revise and condense remainder of presentation so that it fits into 10 minutes or less.
+==== 05/14 ====
+AB, BK - Finish revising presentation.

WiNGS Lab @ UW

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