--- Log opened Thu Jan 30 00:00:24 2020
02:03 < elichai2> fanquake: another interesting build conf is `-march=native`
02:04 < fanquake> yep
02:04 < elichai2> have you tested/benchmarked it? I think it's controversial altough i'm not quite sure why
02:04 < fanquake> elichai2: no, but I've had it sitting in note for a while, and have been meaning to look at it
02:06 < elichai2> i'll run a simple `time` on it with everything else the same as the lto baseline and lets see what happens hehe
02:06 < fanquake> Also -target-cpu, but you're probably passing that already
02:07 < fanquake> elichai2: also, have you been using the lto cache?
02:08 < fanquake> I saw dramatic speed ups at link time when using it
02:08 < elichai2> hmm `ftree-vectorize` is only enabled on -O3
02:08 < elichai2> fanquake: what do you mean lto cache?
02:08 < fanquake> pass cache_path_lto to the linker
02:08 < elichai2> I didn't really look at link time honestly
02:09 < elichai2> damn it so this means I should make a -O3 base line :(
02:09 < fanquake> fair enough. When using it I think I was seeing 30+% speed ups during link
02:09 < elichai2> fanquake: sounds cool
02:09 < fanquake> -fwhole-program-vtables is something else to maybe turn on if using lto
02:10 < elichai2> the one thing I didn't get is that I had to replace *everything* with llvm (clang,clang++,lld,llv-ar,llvm-binar)
02:10 < elichai2> l*llvm-ranlib
02:11 < fanquake> Just remembered you're not doing thin lto, so I don't think the cache is relevant
02:31 < dongcarl> At Guix days right now, pretty good crowd
02:31 < dongcarl> Also: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91307
02:31 < dongcarl> We might need to wait for GCC 10 for a fix
02:31 < dongcarl> Not sure if backported
02:32 < fanquake> dongcarl: looks like fstackreuse also not being fixed any time soon
02:32 < fanquake> What's being discussed at Guix
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03:03 < dongcarl> fanquake: rust packaging... g-exprs... bootstrapping... guix data service
03:05 < fanquake> Sounds like we need the live stream hah
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07:23 < elichai2> anyone have any experience in buying&installing linux on an arm machine? I wonder how expensive and/or hard it is (getting tired of debugging things in travis)
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--- Log closed Fri Jan 31 00:00:25 2020