Author: rlibby Date: Fri Dec 13 09:32:09 2019 New Revision: 355708 URL: https://svnweb.freebsd.org/changeset/base/355708
Log: uma: report slab efficiency Reviewed by: jeff Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D22766 Modified: head/sys/vm/uma_core.c Modified: head/sys/vm/uma_core.c ============================================================================== --- head/sys/vm/uma_core.c Fri Dec 13 09:32:03 2019 (r355707) +++ head/sys/vm/uma_core.c Fri Dec 13 09:32:09 2019 (r355708) @@ -290,6 +290,7 @@ static int sysctl_vm_zone_stats(SYSCTL_HANDLER_ARGS); static int sysctl_handle_uma_zone_allocs(SYSCTL_HANDLER_ARGS); static int sysctl_handle_uma_zone_frees(SYSCTL_HANDLER_ARGS); static int sysctl_handle_uma_zone_flags(SYSCTL_HANDLER_ARGS); +static int sysctl_handle_uma_slab_efficiency(SYSCTL_HANDLER_ARGS); #ifdef INVARIANTS static inline struct noslabbits *slab_dbg_bits(uma_slab_t slab, uma_keg_t keg); @@ -1948,6 +1949,10 @@ zone_alloc_sysctl(uma_zone_t zone, void *unused) SYSCTL_ADD_U32(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "free", CTLFLAG_RD, &keg->uk_free, 0, "items free in the slab layer"); + SYSCTL_ADD_PROC(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, + "efficiency", CTLFLAG_RD | CTLTYPE_INT | CTLFLAG_MPSAFE, + keg, 0, sysctl_handle_uma_slab_efficiency, "I", + "Slab utilization (100 - internal fragmentation %)"); } else SYSCTL_ADD_CONST_STRING(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "name", CTLFLAG_RD, nokeg, "Keg name"); @@ -4438,6 +4443,27 @@ sysctl_handle_uma_zone_flags(SYSCTL_HANDLER_ARGS) sbuf_delete(&sbuf); return (error); +} + +static int +sysctl_handle_uma_slab_efficiency(SYSCTL_HANDLER_ARGS) +{ + uma_keg_t keg = arg1; + int avail, effpct, total; + + total = keg->uk_ppera * PAGE_SIZE; + if ((keg->uk_flags & UMA_ZONE_OFFPAGE) != 0) + total += slab_sizeof(SLAB_MAX_SETSIZE); + /* + * We consider the client's requested size and alignment here, not the + * real size determination uk_rsize, because we also adjust the real + * size for internal implementation reasons (max bitset size). + */ + avail = keg->uk_ipers * roundup2(keg->uk_size, keg->uk_align + 1); + if ((keg->uk_flags & UMA_ZONE_PCPU) != 0) + avail *= mp_maxid + 1; + effpct = 100 * avail / total; + return (sysctl_handle_int(oidp, &effpct, 0, req)); } #ifdef INVARIANTS _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
