[tor-dev] [RFC] Proposal: A First Take at PoW Over Introduction Circuits
desnacked at riseup.net
Tue Sep 22 12:10:30 UTC 2020
George Kadianakis <desnacked at riseup.net> writes:
> tevador <tevador at gmail.com> writes:
>> Hi all,
I have pushed another update to the PoW proposal here:
I also (finally) merged it upstream to torspec as proposal #327:
The most important improvements are:
- Add tevador as an author.
- Update PoW algorithms based on tevador's Equix feedback.
- Update effort estimation algorithm based on tevador's simulation.
- Include hybrid attack section.
- Remove a bunch of blocker tags.
Two things I'd like to work more on:
- I'd like people to take tevador's Equix PoW function and run it on
their boxes and post back benchmarks of how it performed. Particularly
so if you have a GPU-enabled box, so that we can get some benchmarks
from GPUs as well. That will help us tune the proposal even more.
For my laptop (with an Intel CPU i7-8550U CPU @ 1.80GHz) I got pretty
accurate benchmarks (compared to https://github.com/tevador/equix#performance):
Solving nonces 0-499 (interpret: 0, hugepages: 0, threads: 1) ...
283.829505 solutions/sec. (1 thread)
22810.327943 verifications/sec. (1 thread)
$ ./equix-bench --threads 16
Solving nonces 0-499 (interpret: 0, hugepages: 0, threads: 16) ...
2296.585708 solutions/sec. (16 threads)
20223.196324 verifications/sec. (1 thread)
See how to do this here: https://github.com/tevador/equix#build
- I'd like to improve the effort estimation algorithm by dynamically adjusting
SVC_BOTTOM_CAPACITY instead of having it as a static value. Otherwise, I
would like to reduce the currently suggested SVC_BOTTOM_CAPACITY because I
feel that 180 is too big. I would like to put it to 100 which is much more
conservative. I tried to do so while updating tevador's simulation
accordingly, but I found out that the simulation code does not do the graphs
itself, so I didn't make much progress here.
tevador do you have the graphing code somewhere so that I can run the
experiments again and see how the graphs are influenced?
Apart from that, I think the proposal is really solid. I have hence merged it
as proposal #327 to torspec and further revisions can be done on top of that
from now on.
Thanks for all the work here and I'm looking forward to further feedback!
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