00:20 <duck2> hello

00:22 <duck2> i made an incremental reader with libxml++ which can load rr_graph_xc7a50t_test.rr_graph.real.xml into a rrgraph-like struct

00:24 <duck2> there are a few problems though

00:29 <duck2> a) i saw ~800M of memory allocated for the struct, but the file itself is 990M. it also takes a long time: ~20 mins on my laptop with -O3

00:46 <duck2> b) libxml++ is awkward. i couldn't get my code to compile without using pkg-config which outputs 3 lines of include directories. there is also no dbg package for debian testing so i cannot profile it either.

01:02 <duck2> for b) i think i will use plain libxml2 which is cmake friendly, uses byte arrays(not Glib::ustrings) and has a debug package. hopefully that will solve a). /update

01:02 <litghost> duck2: That seems like a lot of memory. Are you using packed structures?

01:10 <duck2> not currently. i think the bulk of the memory comes from edges which all have a single-element vector of metadata attached to them. i wonder how flatbuffers handles this.

11:47 <Mr> what should i do

11:47 <Mr> Hello

12:40 <sf-slack1> <tmichalak> Mr: Hi, there are plenty of things you can do, depends on your skills or what you want to work on. Have a look at the issues in all symbiflow repositories and for starters look for issues tagged with `help wanted` and `good first issue`. For example here: https://github.com/SymbiFlow/prjxray/labels/help%20wanted

12:40 <tpb> Title: Issues · SymbiFlow/prjxray · GitHub (at github.com)

21:25 <duck2> litghost: i brought it down to 500M and ~40 secs. now i think you were right about reading directly into device_ctx. if edges indeed appear after nodes and switches, they all can be read in right off(no need for intermediate struct). the other rr_graph structures are so small that it takes effectively no memory to cache them(grid, segments, block_t

21:25 <duck2> ypes...)

21:28 <duck2> here is the standalone reader i've been working on: https://gist.github.com/duck2/02d001727a252de4a118ae63b680a11c

21:28 <tpb> Title: draft for rr_graph.xml reader with SAX · GitHub (at gist.github.com)