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X-Received-From: 2607:f8b0:4864:20::641 Subject: [Qemu-devel] [PATCH v3 01/39] tcg: Fold CPUTLBWindow into CPUTLBDesc X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Reviewed-by: Alex Benn=C3=A9e Signed-off-by: Richard Henderson Reviewed-by: Alistair Francis --- include/exec/cpu-defs.h | 17 ++++------------- accel/tcg/cputlb.c | 24 ++++++++++++------------ 2 files changed, 16 insertions(+), 25 deletions(-) diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h index 8f2a848bf5..52d150aaf1 100644 --- a/include/exec/cpu-defs.h +++ b/include/exec/cpu-defs.h @@ -127,18 +127,6 @@ typedef struct CPUIOTLBEntry { MemTxAttrs attrs; } CPUIOTLBEntry; =20 -/** - * struct CPUTLBWindow - * @begin_ns: host time (in ns) at the beginning of the time window - * @max_entries: maximum number of entries observed in the window - * - * See also: tlb_mmu_resize_locked() - */ -typedef struct CPUTLBWindow { - int64_t begin_ns; - size_t max_entries; -} CPUTLBWindow; - typedef struct CPUTLBDesc { /* * Describe a region covering all of the large pages allocated @@ -148,9 +136,12 @@ typedef struct CPUTLBDesc { */ target_ulong large_page_addr; target_ulong large_page_mask; + /* host time (in ns) at the beginning of the time window */ + int64_t window_begin_ns; + /* maximum number of entries observed in the window */ + size_t window_max_entries; /* The next index to use in the tlb victim table. */ size_t vindex; - CPUTLBWindow window; size_t n_used_entries; } CPUTLBDesc; =20 diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index f2f618217d..6c7593235c 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -79,11 +79,11 @@ static inline size_t sizeof_tlb(CPUArchState *env, uint= ptr_t mmu_idx) return env->tlb_mask[mmu_idx] + (1 << CPU_TLB_ENTRY_BITS); } =20 -static void tlb_window_reset(CPUTLBWindow *window, int64_t ns, +static void tlb_window_reset(CPUTLBDesc *desc, int64_t ns, size_t max_entries) { - window->begin_ns =3D ns; - window->max_entries =3D max_entries; + desc->window_begin_ns =3D ns; + desc->window_max_entries =3D max_entries; } =20 static void tlb_dyn_init(CPUArchState *env) @@ -94,7 +94,7 @@ static void tlb_dyn_init(CPUArchState *env) CPUTLBDesc *desc =3D &env->tlb_d[i]; size_t n_entries =3D 1 << CPU_TLB_DYN_DEFAULT_BITS; =20 - tlb_window_reset(&desc->window, get_clock_realtime(), 0); + tlb_window_reset(desc, get_clock_realtime(), 0); desc->n_used_entries =3D 0; env->tlb_mask[i] =3D (n_entries - 1) << CPU_TLB_ENTRY_BITS; env->tlb_table[i] =3D g_new(CPUTLBEntry, n_entries); @@ -151,18 +151,18 @@ static void tlb_mmu_resize_locked(CPUArchState *env, = int mmu_idx) int64_t now =3D get_clock_realtime(); int64_t window_len_ms =3D 100; int64_t window_len_ns =3D window_len_ms * 1000 * 1000; - bool window_expired =3D now > desc->window.begin_ns + window_len_ns; + bool window_expired =3D now > desc->window_begin_ns + window_len_ns; =20 - if (desc->n_used_entries > desc->window.max_entries) { - desc->window.max_entries =3D desc->n_used_entries; + if (desc->n_used_entries > desc->window_max_entries) { + desc->window_max_entries =3D desc->n_used_entries; } - rate =3D desc->window.max_entries * 100 / old_size; + rate =3D desc->window_max_entries * 100 / old_size; =20 if (rate > 70) { new_size =3D MIN(old_size << 1, 1 << CPU_TLB_DYN_MAX_BITS); } else if (rate < 30 && window_expired) { - size_t ceil =3D pow2ceil(desc->window.max_entries); - size_t expected_rate =3D desc->window.max_entries * 100 / ceil; + size_t ceil =3D pow2ceil(desc->window_max_entries); + size_t expected_rate =3D desc->window_max_entries * 100 / ceil; =20 /* * Avoid undersizing when the max number of entries seen is just b= elow @@ -182,7 +182,7 @@ static void tlb_mmu_resize_locked(CPUArchState *env, in= t mmu_idx) =20 if (new_size =3D=3D old_size) { if (window_expired) { - tlb_window_reset(&desc->window, now, desc->n_used_entries); + tlb_window_reset(desc, now, desc->n_used_entries); } return; } @@ -190,7 +190,7 @@ static void tlb_mmu_resize_locked(CPUArchState *env, in= t mmu_idx) g_free(env->tlb_table[mmu_idx]); g_free(env->iotlb[mmu_idx]); =20 - tlb_window_reset(&desc->window, now, 0); + tlb_window_reset(desc, now, 0); /* desc->n_used_entries is cleared by the caller */ env->tlb_mask[mmu_idx] =3D (new_size - 1) << CPU_TLB_ENTRY_BITS; env->tlb_table[mmu_idx] =3D g_try_new(CPUTLBEntry, new_size); --=20 2.17.1