* master:
vere: bump version to 0.10.7
libsigsegv: disable stack vma check
vere: bump version to 0.10.6
ci: add travis as trusted user
jets: use appropriate macro
noun: add -C to control memo cache size
jets: restore fond/play/peek hooks
jam: add commented-out functionality to count size of atom
jets: cap memo cache and remove peek, play, and fond jets
noun: add functions to count size of noun
* master: (147 commits)
vere: bump version to 0.10.7
libsigsegv: disable stack vma check
vere: bump version to 0.10.6
ci: add travis as trusted user
jets: use appropriate macro
noun: add -C to control memo cache size
jets: restore fond/play/peek hooks
jam: add commented-out functionality to count size of atom
jets: cap memo cache and remove peek, play, and fond jets
noun: add functions to count size of noun
release: urbit-os-v1.0.23
interface/config: fix production build
soto: run +on-load migration once
publish, links: restore full height
sh/build-interface: amend for SPA
interface/CONTRIBUTING: amend for SPA / webpack
solid: update pill
hood + apps: fix OTA process for feat/SPA
hood: add version %6 for %file-server upgrade
chat: equally size both code + s3 buttons
...
* ipc-redux:
behn: optimize bounded timers scry
vere: support saving scry jam to directory
vere: u3_nul in place of c3__null
vere: if behn scry fails, don't try again
vere: rename behn.c's alm -> alm_o
vere: scry out next behn timer for backstop
vere: warn on invalid behn doze
behn: improve scry interface
arvo: allow the empty desk (%$) in scries
vere: add -X flag for running a scry
This patches libsigsegv to not check the stack vma on Linux, since that
involves reading procfs, and we make very heavy use of sigsegv. This
eliminates most of urbit's performance discrepancy between Linux and
MacOS. These are the benchmarks used; note this is a local MBP vs a
cloud Linux server, and the MBP is almost certainly faster hardware.
We take two benchmarks, one of which decrements 10 million times and the
other simply allocates 125MB of memory. These are the results:
cpu-heavy == =/ n 10.000.000 |-(?~(n n $(n (dec n))))
mem-heavy == =a (bex 1.000.000.008)
macos, cpu-heavy: 6 seconds
macos, mem-heavy: 1 second
linux-before, cpu-heavy: 30 seconds
linux-before, mem-heavy: 160 seconds
linux-after, cpu-heavy 9 seconds
linux-after, mem-heavy 1.3 seconds
This represents a 3x speedup for the cpu-heavy operation and a 120x
speedup for the memory-heavy operation.
This check was used to try to distinguish stack overflow from other
forms of segmentation fault. In the comments in src/handler-unix.c, it
describes three heuristics it uses, depending on what's available from
the OS. In the linux-i386 case, all three are availble, so we simply
disable the slow one. This correctly recognizes stack overflow if you
simply alloca(10000000000).
