43 lines
1.9 KiB
Go
43 lines
1.9 KiB
Go
package z
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import "sync/atomic"
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var numBytes int64
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// NumAllocBytes returns the number of bytes allocated using calls to z.Calloc. The allocations
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// could be happening via either Go or jemalloc, depending upon the build flags.
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func NumAllocBytes() int64 {
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return atomic.LoadInt64(&numBytes)
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}
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// MemStats is used to fetch JE Malloc Stats. The stats are fetched from
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// the mallctl namespace http://jemalloc.net/jemalloc.3.html#mallctl_namespace.
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type MemStats struct {
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// Total number of bytes allocated by the application.
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// http://jemalloc.net/jemalloc.3.html#stats.allocated
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Allocated uint64
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// Total number of bytes in active pages allocated by the application. This
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// is a multiple of the page size, and greater than or equal to
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// Allocated.
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// http://jemalloc.net/jemalloc.3.html#stats.active
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Active uint64
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// Maximum number of bytes in physically resident data pages mapped by the
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// allocator, comprising all pages dedicated to allocator metadata, pages
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// backing active allocations, and unused dirty pages. This is a maximum
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// rather than precise because pages may not actually be physically
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// resident if they correspond to demand-zeroed virtual memory that has not
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// yet been touched. This is a multiple of the page size, and is larger
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// than stats.active.
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// http://jemalloc.net/jemalloc.3.html#stats.resident
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Resident uint64
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// Total number of bytes in virtual memory mappings that were retained
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// rather than being returned to the operating system via e.g. munmap(2) or
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// similar. Retained virtual memory is typically untouched, decommitted, or
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// purged, so it has no strongly associated physical memory (see extent
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// hooks http://jemalloc.net/jemalloc.3.html#arena.i.extent_hooks for
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// details). Retained memory is excluded from mapped memory statistics,
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// e.g. stats.mapped (http://jemalloc.net/jemalloc.3.html#stats.mapped).
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// http://jemalloc.net/jemalloc.3.html#stats.retained
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Retained uint64
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}
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