Commit Graph

15 Commits

Author SHA1 Message Date
Kevin Svetlitski
41e0b857be Make headers self-contained by fixing #includes
Header files are now self-contained, which makes the relationships
between the files clearer, and crucially allows LSP tools like `clangd`
to function correctly in all of our header files. I have verified that
the headers are self-contained (aside from the various Windows shims) by
compiling them as if they were C files – in a follow-up commit I plan to
add this to CI to ensure we don't regress on this front.
2023-07-14 09:06:32 -07:00
cuishuang
9a242f16d9 fix some typos
Signed-off-by: cuishuang <imcusg@gmail.com>
2022-04-25 11:29:00 -07:00
Charles
eaaa368bab Add comments and use meaningful vars in sz_psz2ind. 2022-03-24 16:56:59 -07:00
Qi Wang
7dcf77809c Mark slab as true on sized dealloc fast path.
For sized dealloc, fastpath only handles lookup-able sizes, which must be slabs.
2021-12-06 14:28:34 -08:00
David Goldblatt
7ad2f78663 Avoid a -Wundef warning on LG_SLAB_MAXREGS. 2020-09-17 10:05:40 -07:00
Hao Liu
1541ffc765 configure: add --with-lg-slab-maxregs configure option.
Specify the maximum number of regions in a slab, which is
(<lg-page> - <lg-tiny-min>) by default. This increases the limit of slab sizes
specified by "slab_sizes" in malloc_conf. This should never be less than
the default value. The max value of this option is related to LG_BITMAP_MAXBITS
(see more in bitmap.h).

For example, on a 4k page size system, if we:
  1) configure jemalloc with with --with-lg-slab-maxregs=12.
  2) export MALLOC_CONF="slab_sizes:9-16:4"
The slab size of 16 bytes is set to 4 pages. Previously, the default
lg-slab-maxregs is 9 (i.e. 12 - 3). The max slab size of 16 bytes is 2 pages
(i.e. (1<<9) * 16 bytes). By increasing the value from 9 to 12, the max slab
size can be set by MALLOC_CONF is 16 pages (i.e. (1<<12) * 16 bytes).
2020-09-16 13:58:38 -07:00
David Goldblatt
46471ea327 SC: Name the max lookup constant. 2020-05-04 12:27:07 -07:00
David Goldblatt
79dd0c04ed SC: Simplify SC_NPSIZES computation.
Rather than taking all the sizes and subtracting out those that don't fit, we
instead just add up all the ones that do.
2020-05-04 12:27:07 -07:00
David T. Goldblatt
e7cf84a8dd Rearrange slab data and constants
The constants logically belong in the sc module. The slab data bitmap isn't
really scoped to an arena; move it to its own module.
2019-09-23 23:06:27 -07:00
Yinan Zhang
ae124b8684 Improve size class header
Mainly fixing typos.  The only non-trivial change is in the
computation for SC_NPSIZES, though the result wouldn't be any
different when SC_NGROUP = 4 as is always the case at the moment.
2019-04-24 10:45:12 -07:00
Tyler Etzel
33f1aa5bad Fix comment on SC_NPSIZES. 2018-08-02 10:16:06 -07:00
David Goldblatt
3aba072cef SC: Remove global data.
The global data is mostly only used at initialization, or for easy access to
values we could compute statically.  Instead of consuming that space (and
risking TLB misses), we can just pass around a pointer to stack data during
bootstrapping.
2018-07-23 13:37:08 -07:00
David Goldblatt
55e5cc1341 SC: Make some key size classes static.
The largest small class, smallest large class, and largest large class may all
be needed down fast paths; to avoid the risk of touching another cache line, we
can make them available as constants.
2018-07-12 20:53:06 -07:00
David T. Goldblatt
a7f68aed3e SC: Add page customization functionality. 2018-07-12 20:53:06 -07:00
David Goldblatt
e904f813b4 Hide size class computation behind a layer of indirection.
This class removes almost all the dependencies on size_classes.h, accessing the
data there only via the new module sc.h, which does not depend on any
configuration options.

In a subsequent commit, we'll remove the configure-time size class computations,
doing them at boot time, instead.
2018-07-12 20:53:06 -07:00