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David Alan Gilbert" , peterx@redhat.com, Fabiano Rosas Subject: [PATCH v2 07/13] migration/postcopy: Add blocktime fault counts per-vcpu Date: Mon, 9 Jun 2025 15:12:53 -0400 Message-ID: <20250609191259.9053-8-peterx@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250609191259.9053-1-peterx@redhat.com> References: <20250609191259.9053-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add a field to count how many remote faults one vCPU has taken. So far it's still not used, but will be soon. Reviewed-by: Fabiano Rosas Signed-off-by: Peter Xu --- migration/postcopy-ram.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index f79fb7663c..f5c58a6ca7 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -116,6 +116,8 @@ typedef struct PostcopyBlocktimeContext { uint64_t *vcpu_blocktime_start; /* blocktime per vCPU */ uint64_t *vcpu_blocktime_total; + /* count of faults per vCPU */ + uint64_t *vcpu_faults_count; /* page address per vCPU */ uintptr_t *vcpu_addr; /* total blocktime when all vCPUs are stopped */ @@ -136,6 +138,7 @@ static void destroy_blocktime_context(struct PostcopyBlocktimeContext *ctx) { g_free(ctx->vcpu_blocktime_start); g_free(ctx->vcpu_blocktime_total); + g_free(ctx->vcpu_faults_count); g_free(ctx->vcpu_addr); g_free(ctx); } @@ -155,6 +158,7 @@ static struct PostcopyBlocktimeContext *blocktime_context_new(void) ctx->vcpu_blocktime_start = g_new0(uint64_t, smp_cpus); ctx->vcpu_blocktime_total = g_new0(uint64_t, smp_cpus); + ctx->vcpu_faults_count = g_new0(uint64_t, smp_cpus); ctx->vcpu_addr = g_new0(uintptr_t, smp_cpus); ctx->exit_notifier.notify = migration_exit_cb; qemu_add_exit_notifier(&ctx->exit_notifier); @@ -855,6 +859,7 @@ void mark_postcopy_blocktime_begin(uintptr_t addr, uint32_t ptid, dc->last_begin = current_us; dc->vcpu_blocktime_start[cpu] = current_us; dc->vcpu_addr[cpu] = addr; + dc->vcpu_faults_count[cpu]++; /* * The caller should only inject a blocktime entry when the page is -- 2.49.0