65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
#include "jemalloc/internal/jemalloc_preamble.h"
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#include "jemalloc/internal/sz.h"
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JEMALLOC_ALIGNED(CACHELINE)
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size_t sz_pind2sz_tab[SC_NPSIZES+1];
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static void
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sz_boot_pind2sz_tab(const sc_data_t *sc_data) {
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int pind = 0;
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for (unsigned i = 0; i < SC_NSIZES; i++) {
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const sc_t *sc = &sc_data->sc[i];
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if (sc->psz) {
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sz_pind2sz_tab[pind] = (ZU(1) << sc->lg_base)
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+ (ZU(sc->ndelta) << sc->lg_delta);
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pind++;
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}
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}
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for (int i = pind; i <= (int)SC_NPSIZES; i++) {
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sz_pind2sz_tab[pind] = sc_data->large_maxclass + PAGE;
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}
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}
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JEMALLOC_ALIGNED(CACHELINE)
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size_t sz_index2size_tab[SC_NSIZES];
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static void
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sz_boot_index2size_tab(const sc_data_t *sc_data) {
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for (unsigned i = 0; i < SC_NSIZES; i++) {
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const sc_t *sc = &sc_data->sc[i];
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sz_index2size_tab[i] = (ZU(1) << sc->lg_base)
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+ (ZU(sc->ndelta) << (sc->lg_delta));
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}
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}
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/*
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* To keep this table small, we divide sizes by the tiny min size, which gives
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* the smallest interval for which the result can change.
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*/
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JEMALLOC_ALIGNED(CACHELINE)
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uint8_t sz_size2index_tab[(SC_LOOKUP_MAXCLASS >> SC_LG_TINY_MIN) + 1];
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static void
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sz_boot_size2index_tab(const sc_data_t *sc_data) {
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size_t dst_max = (SC_LOOKUP_MAXCLASS >> SC_LG_TINY_MIN) + 1;
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size_t dst_ind = 0;
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for (unsigned sc_ind = 0; sc_ind < SC_NSIZES && dst_ind < dst_max;
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sc_ind++) {
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const sc_t *sc = &sc_data->sc[sc_ind];
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size_t sz = (ZU(1) << sc->lg_base)
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+ (ZU(sc->ndelta) << sc->lg_delta);
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size_t max_ind = ((sz + (ZU(1) << SC_LG_TINY_MIN) - 1)
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>> SC_LG_TINY_MIN);
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for (; dst_ind <= max_ind && dst_ind < dst_max; dst_ind++) {
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sz_size2index_tab[dst_ind] = sc_ind;
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}
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}
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}
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void
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sz_boot(const sc_data_t *sc_data) {
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sz_boot_pind2sz_tab(sc_data);
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sz_boot_index2size_tab(sc_data);
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sz_boot_size2index_tab(sc_data);
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}
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