diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/libxc/xc_memshr.c | 10 | ||||
| -rw-r--r-- | tools/libxc/xenctrl.h | 17 |
2 files changed, 27 insertions, 0 deletions
diff --git a/tools/libxc/xc_memshr.c b/tools/libxc/xc_memshr.c index d82d4d9226..810200c5e4 100644 --- a/tools/libxc/xc_memshr.c +++ b/tools/libxc/xc_memshr.c @@ -225,3 +225,13 @@ int xc_memshr_debug_gref(xc_interface *xch, return do_domctl(xch, &domctl); } +long xc_sharing_freed_pages(xc_interface *xch) +{ + return do_memory_op(xch, XENMEM_get_sharing_freed_pages, NULL, 0); +} + +long xc_sharing_used_frames(xc_interface *xch) +{ + return do_memory_op(xch, XENMEM_get_sharing_shared_pages, NULL, 0); +} + diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h index 2b445085b6..78133315ae 100644 --- a/tools/libxc/xenctrl.h +++ b/tools/libxc/xenctrl.h @@ -1228,6 +1228,23 @@ int xc_mmuext_op(xc_interface *xch, struct mmuext_op *op, unsigned int nr_ops, /* System wide memory properties */ long xc_maximum_ram_page(xc_interface *xch); +/** + * This function returns the total number of pages freed by using sharing + * on the system. For example, if two domains contain a single entry in + * their p2m map that points to the same shared page (and no other pages + * in the system are shared), then this function should return 1. + */ +long xc_sharing_freed_pages(xc_interface *xch); + +/** + * This function returns the total number of frames occupied by shared + * pages on the system. This is independent of the number of domains + * pointing at these frames. For example, in the above scenario this + * should return 1. The following should hold: + * memory usage without sharing = freed_pages + used_frames + */ +long xc_sharing_used_frames(xc_interface *xch); + /* Get current total pages allocated to a domain. */ long xc_get_tot_pages(xc_interface *xch, uint32_t domid); |