From patchwork Tue Jan 31 18:18:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Gardon X-Patchwork-Id: 13123257 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB8AAC636CD for ; Tue, 31 Jan 2023 18:18:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230223AbjAaSS2 (ORCPT ); Tue, 31 Jan 2023 13:18:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229488AbjAaSS0 (ORCPT ); Tue, 31 Jan 2023 13:18:26 -0500 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3C5B2BF08 for ; Tue, 31 Jan 2023 10:18:25 -0800 (PST) Received: by mail-pg1-x54a.google.com with SMTP id 84-20020a630257000000b00477f88d334eso7133004pgc.11 for ; Tue, 31 Jan 2023 10:18:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=pgKsZ0Bh25hFzhxXEJXQv/JsnUoHDVhjIiyIEzL41Jo=; b=Z2g50fe+CPZFO8tMIw/E1VLxD/KIRZsbBWBSJkEePWsRp8qIJl6CfO9RIXcHppw0xO L7tmqW9D1Et7+msz1GbU6hW2yP+8u0uN8lKgY1QkAl5qtAP+jtZ/lWnRpsXOYG/HbrUf EQPAeJwJxzrJNVgjd723NayafHeUco/ZKhLANbbCmL/+x94unnQg4DRrIySQQ2c/dcmn LT6P0NTkr5KKRrZIbsKX2rRAZf/ctRYzibrF7Pi0nbIh8yYj8PcbV1K6B0mdd3miU81K WUaXRmc/6Su7QKYv9b7bXRuS7EJZ6hO/aF0Ft2R4uyzrslddQSLFkwnVjap/Dp1a/j5J sb8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=pgKsZ0Bh25hFzhxXEJXQv/JsnUoHDVhjIiyIEzL41Jo=; b=Ap85cMWCRaFMurtG4G7BCsPNqXUoLcFsf53JCHCVNB/CWXTGzufMI4yXQyDg16Kk6U Kh2Z86CADkeo7zysoZbj/5QiLfzXaL9vGZC1+g1njDnhVK14uo3e4QiaIHjKZtWN+Qam BdOJ558CFQVcjmFdLNcwLbQj63hr5SfSHlHKvJsC+bptTHaRiHA0dodxRBic1FZA2jUe 0ANcC8Pg+9FoNgR0Q6RnsMxBX7spPm0/PFNDjxXxboXgt9fMAFIGEC/NVPgAQloR3tkU 6iWDJNJvQ6Ee4EmU00X8Qffrvmo1g5dLsQMkzXg2g902WQR2no2BIDokjzQ5SQCZse9I e0og== X-Gm-Message-State: AFqh2kqIkd8d6xHqeHvXXqDmCuKnXmBet1pr5zYxtQ6287Wdwy89eqo3 bvZa61rd6XTyEOOiio802fAA8Sbr1I9v X-Google-Smtp-Source: AMrXdXt2mgvQk+ozaOnEaWBZ++pO4SrDZ9D7gvElphQShUHl5v6pQijVXHnc6yt3xPyBTQR4wKS3To/7osiF X-Received: from sweer.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:e45]) (user=bgardon job=sendgmr) by 2002:a62:1989:0:b0:58d:ae61:c14b with SMTP id 131-20020a621989000000b0058dae61c14bmr6820820pfz.51.1675189105091; Tue, 31 Jan 2023 10:18:25 -0800 (PST) Date: Tue, 31 Jan 2023 18:18:19 +0000 In-Reply-To: <20230131181820.179033-1-bgardon@google.com> Mime-Version: 1.0 References: <20230131181820.179033-1-bgardon@google.com> X-Mailer: git-send-email 2.39.1.456.gfc5497dd1b-goog Message-ID: <20230131181820.179033-2-bgardon@google.com> Subject: [PATCH V5 1/2] selftests: KVM: Move dirty logging functions to memstress.(c|h) From: Ben Gardon To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Peter Xu , Sean Christopherson , David Matlack , Vipin Sharma , Ricardo Koller , Ben Gardon Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Move some helper functions from dirty_log_perf_test.c to the memstress library so that they can be used in a future commit which tests page splitting during dirty logging. Reviewed-by: Vipin Sharma Signed-off-by: Ben Gardon --- .../selftests/kvm/dirty_log_perf_test.c | 84 ++----------------- .../testing/selftests/kvm/include/memstress.h | 8 ++ tools/testing/selftests/kvm/lib/memstress.c | 72 ++++++++++++++++ 3 files changed, 87 insertions(+), 77 deletions(-) diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c index e9d6d1aecf89c..416719e205183 100644 --- a/tools/testing/selftests/kvm/dirty_log_perf_test.c +++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c @@ -136,77 +136,6 @@ struct test_params { bool random_access; }; -static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable) -{ - int i; - - for (i = 0; i < slots; i++) { - int slot = MEMSTRESS_MEM_SLOT_INDEX + i; - int flags = enable ? KVM_MEM_LOG_DIRTY_PAGES : 0; - - vm_mem_region_set_flags(vm, slot, flags); - } -} - -static inline void enable_dirty_logging(struct kvm_vm *vm, int slots) -{ - toggle_dirty_logging(vm, slots, true); -} - -static inline void disable_dirty_logging(struct kvm_vm *vm, int slots) -{ - toggle_dirty_logging(vm, slots, false); -} - -static void get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots) -{ - int i; - - for (i = 0; i < slots; i++) { - int slot = MEMSTRESS_MEM_SLOT_INDEX + i; - - kvm_vm_get_dirty_log(vm, slot, bitmaps[i]); - } -} - -static void clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], - int slots, uint64_t pages_per_slot) -{ - int i; - - for (i = 0; i < slots; i++) { - int slot = MEMSTRESS_MEM_SLOT_INDEX + i; - - kvm_vm_clear_dirty_log(vm, slot, bitmaps[i], 0, pages_per_slot); - } -} - -static unsigned long **alloc_bitmaps(int slots, uint64_t pages_per_slot) -{ - unsigned long **bitmaps; - int i; - - bitmaps = malloc(slots * sizeof(bitmaps[0])); - TEST_ASSERT(bitmaps, "Failed to allocate bitmaps array."); - - for (i = 0; i < slots; i++) { - bitmaps[i] = bitmap_zalloc(pages_per_slot); - TEST_ASSERT(bitmaps[i], "Failed to allocate slot bitmap."); - } - - return bitmaps; -} - -static void free_bitmaps(unsigned long *bitmaps[], int slots) -{ - int i; - - for (i = 0; i < slots; i++) - free(bitmaps[i]); - - free(bitmaps); -} - static void run_test(enum vm_guest_mode mode, void *arg) { struct test_params *p = arg; @@ -236,7 +165,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) host_num_pages = vm_num_host_pages(mode, guest_num_pages); pages_per_slot = host_num_pages / p->slots; - bitmaps = alloc_bitmaps(p->slots, pages_per_slot); + bitmaps = memstress_alloc_bitmaps(p->slots, pages_per_slot); if (dirty_log_manual_caps) vm_enable_cap(vm, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, @@ -277,7 +206,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) /* Enable dirty logging */ clock_gettime(CLOCK_MONOTONIC, &start); - enable_dirty_logging(vm, p->slots); + memstress_enable_dirty_logging(vm, p->slots); ts_diff = timespec_elapsed(start); pr_info("Enabling dirty logging time: %ld.%.9lds\n\n", ts_diff.tv_sec, ts_diff.tv_nsec); @@ -306,7 +235,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) iteration, ts_diff.tv_sec, ts_diff.tv_nsec); clock_gettime(CLOCK_MONOTONIC, &start); - get_dirty_log(vm, bitmaps, p->slots); + memstress_get_dirty_log(vm, bitmaps, p->slots); ts_diff = timespec_elapsed(start); get_dirty_log_total = timespec_add(get_dirty_log_total, ts_diff); @@ -315,7 +244,8 @@ static void run_test(enum vm_guest_mode mode, void *arg) if (dirty_log_manual_caps) { clock_gettime(CLOCK_MONOTONIC, &start); - clear_dirty_log(vm, bitmaps, p->slots, pages_per_slot); + memstress_clear_dirty_log(vm, bitmaps, p->slots, + pages_per_slot); ts_diff = timespec_elapsed(start); clear_dirty_log_total = timespec_add(clear_dirty_log_total, ts_diff); @@ -334,7 +264,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) /* Disable dirty logging */ clock_gettime(CLOCK_MONOTONIC, &start); - disable_dirty_logging(vm, p->slots); + memstress_disable_dirty_logging(vm, p->slots); ts_diff = timespec_elapsed(start); pr_info("Disabling dirty logging time: %ld.%.9lds\n", ts_diff.tv_sec, ts_diff.tv_nsec); @@ -359,7 +289,7 @@ static void run_test(enum vm_guest_mode mode, void *arg) clear_dirty_log_total.tv_nsec, avg.tv_sec, avg.tv_nsec); } - free_bitmaps(bitmaps, p->slots); + memstress_free_bitmaps(bitmaps, p->slots); arch_cleanup_vm(vm); memstress_destroy_vm(vm); } diff --git a/tools/testing/selftests/kvm/include/memstress.h b/tools/testing/selftests/kvm/include/memstress.h index 72e3e358ef7bd..ce4e603050eaa 100644 --- a/tools/testing/selftests/kvm/include/memstress.h +++ b/tools/testing/selftests/kvm/include/memstress.h @@ -72,4 +72,12 @@ void memstress_guest_code(uint32_t vcpu_id); uint64_t memstress_nested_pages(int nr_vcpus); void memstress_setup_nested(struct kvm_vm *vm, int nr_vcpus, struct kvm_vcpu *vcpus[]); +void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots); +void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots); +void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots); +void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], + int slots, uint64_t pages_per_slot); +unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot); +void memstress_free_bitmaps(unsigned long *bitmaps[], int slots); + #endif /* SELFTEST_KVM_MEMSTRESS_H */ diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c index 5f1d3173c238c..3632956c6bcf5 100644 --- a/tools/testing/selftests/kvm/lib/memstress.c +++ b/tools/testing/selftests/kvm/lib/memstress.c @@ -5,6 +5,7 @@ #define _GNU_SOURCE #include +#include #include "kvm_util.h" #include "memstress.h" @@ -320,3 +321,74 @@ void memstress_join_vcpu_threads(int nr_vcpus) for (i = 0; i < nr_vcpus; i++) pthread_join(vcpu_threads[i].thread, NULL); } + +static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable) +{ + int i; + + for (i = 0; i < slots; i++) { + int slot = MEMSTRESS_MEM_SLOT_INDEX + i; + int flags = enable ? KVM_MEM_LOG_DIRTY_PAGES : 0; + + vm_mem_region_set_flags(vm, slot, flags); + } +} + +void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots) +{ + toggle_dirty_logging(vm, slots, true); +} + +void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots) +{ + toggle_dirty_logging(vm, slots, false); +} + +void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots) +{ + int i; + + for (i = 0; i < slots; i++) { + int slot = MEMSTRESS_MEM_SLOT_INDEX + i; + + kvm_vm_get_dirty_log(vm, slot, bitmaps[i]); + } +} + +void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], + int slots, uint64_t pages_per_slot) +{ + int i; + + for (i = 0; i < slots; i++) { + int slot = MEMSTRESS_MEM_SLOT_INDEX + i; + + kvm_vm_clear_dirty_log(vm, slot, bitmaps[i], 0, pages_per_slot); + } +} + +unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot) +{ + unsigned long **bitmaps; + int i; + + bitmaps = malloc(slots * sizeof(bitmaps[0])); + TEST_ASSERT(bitmaps, "Failed to allocate bitmaps array."); + + for (i = 0; i < slots; i++) { + bitmaps[i] = bitmap_zalloc(pages_per_slot); + TEST_ASSERT(bitmaps[i], "Failed to allocate slot bitmap."); + } + + return bitmaps; +} + +void memstress_free_bitmaps(unsigned long *bitmaps[], int slots) +{ + int i; + + for (i = 0; i < slots; i++) + free(bitmaps[i]); + + free(bitmaps); +}