Commit 166784e2 authored by Jason A. Harmening's avatar Jason A. Harmening Committed by Mark Johnston
Browse files

amd64 pmap: convert to counter(9), add PV and pagetable page counts

This change converts most of the counters in the amd64 pmap from
global atomics to scalable counter(9) counters.  Per discussion
with kib@, it also removes the handrolled per-CPU PCID save count
as it isn't considered generally useful.

The bulk of these counters remain guarded by PV_STATS, as it seems
unlikely that they will be useful outside of very specific debugging
scenarios.  However, this change does add two new counters that
are available without PV_STATS.  pt_page_count and pv_page_count
track the number of active physical-to-virtual list pages and page
table pages, respectively.  These will be useful in evaluating
the memory footprint of pmap structures under various workloads,
which will help to guide future changes in this area.

Reviewed by:	kib

(cherry picked from commit e4b8deb2)
parent 518ea72e
......@@ -227,7 +227,6 @@ ASSYM(PC_GS32P, offsetof(struct pcpu, pc_gs32p));
ASSYM(PC_LDT, offsetof(struct pcpu, pc_ldt));
ASSYM(PC_COMMONTSS, offsetof(struct pcpu, pc_common_tss));
ASSYM(PC_TSS, offsetof(struct pcpu, pc_tss));
ASSYM(PC_PM_SAVE_CNT, offsetof(struct pcpu, pc_pm_save_cnt));
ASSYM(PC_KCR3, offsetof(struct pcpu, pc_kcr3));
ASSYM(PC_UCR3, offsetof(struct pcpu, pc_ucr3));
ASSYM(PC_UCR3_LOAD_MASK, offsetof(struct pcpu, pc_ucr3_load_mask));
This diff is collapsed.
......@@ -76,7 +76,6 @@ _Static_assert(sizeof(struct monitorbuf) == 128, "2x cache line");
struct system_segment_descriptor *pc_ldt; \
/* Pointer to the CPU TSS descriptor */ \
struct system_segment_descriptor *pc_tss; \
uint64_t pc_pm_save_cnt; \
u_int pc_cmci_mask; /* MCx banks for CMCI */ \
uint64_t pc_dbreg[16]; /* ddb debugging regs */ \
uint64_t pc_pti_stack[PC_PTI_STACK_SZ]; \
......@@ -89,7 +88,7 @@ _Static_assert(sizeof(struct monitorbuf) == 128, "2x cache line");
uint32_t pc_ibpb_set; \
void *pc_mds_buf; \
void *pc_mds_buf64; \
uint32_t pc_pad[2]; \
uint32_t pc_pad[4]; \
uint8_t pc_mds_tmp[64]; \
u_int pc_ipi_bitmap; \
struct amd64tss pc_common_tss; \
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