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).
This commit is contained in:
parent
d243b4ec48
commit
1541ffc765
@ -250,6 +250,13 @@ any of the following arguments (not a definitive list) to 'configure':
|
|||||||
configuration, jemalloc will provide additional size classes that are not
|
configuration, jemalloc will provide additional size classes that are not
|
||||||
16-byte-aligned (24, 40, and 56).
|
16-byte-aligned (24, 40, and 56).
|
||||||
|
|
||||||
|
* `--with-lg-slab-maxregs=<lg-slab-maxregs>`
|
||||||
|
|
||||||
|
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.
|
||||||
|
|
||||||
* `--with-lg-vaddr=<lg-vaddr>`
|
* `--with-lg-vaddr=<lg-vaddr>`
|
||||||
|
|
||||||
Specify the number of significant virtual address bits. By default, the
|
Specify the number of significant virtual address bits. By default, the
|
||||||
|
@ -1586,6 +1586,15 @@ if test "x$with_lg_quantum" != "x" ; then
|
|||||||
AC_DEFINE_UNQUOTED([LG_QUANTUM], [$with_lg_quantum])
|
AC_DEFINE_UNQUOTED([LG_QUANTUM], [$with_lg_quantum])
|
||||||
fi
|
fi
|
||||||
|
|
||||||
|
AC_ARG_WITH([lg_slab_maxregs],
|
||||||
|
[AS_HELP_STRING([--with-lg-slab-maxregs=<lg-slab-maxregs>],
|
||||||
|
[Base 2 log of maximum number of regions in a slab (used with malloc_conf slab_sizes)])],
|
||||||
|
[LG_SLAB_MAXREGS="with_lg_slab_maxregs"],
|
||||||
|
[LG_SLAB_MAXREGS=""])
|
||||||
|
if test "x$with_lg_slab_maxregs" != "x" ; then
|
||||||
|
AC_DEFINE_UNQUOTED([LG_SLAB_MAXREGS], [$with_lg_slab_maxregs])
|
||||||
|
fi
|
||||||
|
|
||||||
AC_ARG_WITH([lg_page],
|
AC_ARG_WITH([lg_page],
|
||||||
[AS_HELP_STRING([--with-lg-page=<lg-page>], [Base 2 log of system page size])],
|
[AS_HELP_STRING([--with-lg-page=<lg-page>], [Base 2 log of system page size])],
|
||||||
[LG_PAGE="$with_lg_page"], [LG_PAGE="detect"])
|
[LG_PAGE="$with_lg_page"], [LG_PAGE="detect"])
|
||||||
|
@ -182,6 +182,9 @@
|
|||||||
/* One page is 2^LG_PAGE bytes. */
|
/* One page is 2^LG_PAGE bytes. */
|
||||||
#undef LG_PAGE
|
#undef LG_PAGE
|
||||||
|
|
||||||
|
/* Maximum number of regions in a slab. */
|
||||||
|
#undef LG_SLAB_MAXREGS
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* One huge page is 2^LG_HUGEPAGE bytes. Note that this is defined even if the
|
* One huge page is 2^LG_HUGEPAGE bytes. Note that this is defined even if the
|
||||||
* system does not explicitly support huge pages; system calls that require
|
* system does not explicitly support huge pages; system calls that require
|
||||||
|
@ -270,8 +270,14 @@
|
|||||||
#define SC_LARGE_MAXCLASS (SC_MAX_BASE + (SC_NGROUP - 1) * SC_MAX_DELTA)
|
#define SC_LARGE_MAXCLASS (SC_MAX_BASE + (SC_NGROUP - 1) * SC_MAX_DELTA)
|
||||||
|
|
||||||
/* Maximum number of regions in one slab. */
|
/* Maximum number of regions in one slab. */
|
||||||
#define SC_LG_SLAB_MAXREGS (LG_PAGE - SC_LG_TINY_MIN)
|
#ifndef LG_SLAB_MAXREGS
|
||||||
#define SC_SLAB_MAXREGS (1U << LG_SLAB_MAXREGS)
|
# define SC_LG_SLAB_MAXREGS (LG_PAGE - SC_LG_TINY_MIN)
|
||||||
|
#elif (LG_SLAB_MAXREGS < (LG_PAGE - SC_LG_TINY_MIN))
|
||||||
|
# error "Unsupported SC_LG_SLAB_MAXREGS"
|
||||||
|
#else
|
||||||
|
# define SC_LG_SLAB_MAXREGS LG_SLAB_MAXREGS
|
||||||
|
#endif
|
||||||
|
#define SC_SLAB_MAXREGS (1U << SC_LG_SLAB_MAXREGS)
|
||||||
|
|
||||||
|
|
||||||
typedef struct sc_s sc_t;
|
typedef struct sc_s sc_t;
|
||||||
|
Loading…
Reference in New Issue
Block a user