➜ /tmp pprof --alloc_space --text /data/apps/qemu-kvm/x86_64-softmmu/qemu-system-x86_64 profile_base/profile.0006.heap Some binary filenames not available. Symbolization may be incomplete. Try setting PPROF_BINARY_PATH to the search path for local binaries. File: qemu-system-x86_64 Type: alloc_space Showing nodes accounting for 3141.92MB, 100% of 3142.39MB total Dropped 786 nodes (cum <= 15.71MB) flat flat% sum% cum cum% 1496.34MB 47.62% 47.62% 1496.34MB 47.62% qemu_try_memalign 1480.44MB 47.11% 94.73% 1481.66MB 47.15% [librados.so.2.0.0] 162.53MB 5.17% 99.90% 162.53MB 5.17% [libglib-2.0.so.0.4200.2] 1.28MB 0.041% 99.94% 717.74MB 22.84% [libceph-common.so.0] 1.21MB 0.039% 100% 766.42MB 24.39% [librbd.so.1.12.0] 0.12MB 0.0039% 100% 715.87MB 22.78% [libstdc++.so.6.0.19] 0 0% 100% 887.78MB 28.25% 0 0% 100% 779.33MB 24.80% __clone 0 0% 100% 2252.34MB 71.68% __correctly_grouped_prefixwc 0 0% 100% 110.51MB 3.52% __libc_start_main 0 0% 100% 110.51MB 3.52% _start 0 0% 100% 61.87MB 1.97% access_with_adjusted_size 0 0% 100% 61.87MB 1.97% address_space_rw 0 0% 100% 43.38MB 1.38% address_space_update_ioeventfds 0 0% 100% 18.07MB 0.57% address_space_update_topology 0 0% 100% 17.39MB 0.55% address_space_update_topology_pass 0 0% 100% 61.87MB 1.97% address_space_write 0 0% 100% 61.87MB 1.97% address_space_write_continue 0 0% 100% 91.17MB 2.90% aio_ctx_dispatch 0 0% 100% 91.17MB 2.90% aio_dispatch 0 0% 100% 723.08MB 23.01% bdrv_aligned_preadv 0 0% 100% 1529.26MB 48.67% bdrv_aligned_pwritev 0 0% 100% 723.08MB 23.01% bdrv_co_do_preadv 0 0% 100% 1529.26MB 48.67% bdrv_co_do_pwritev 0 0% 100% 723.08MB 23.01% bdrv_co_do_readv 0 0% 100% 2252.34MB 71.68% bdrv_co_io_em 0 0% 100% 723.08MB 23.01% bdrv_co_readv 0 0% 100% 723.08MB 23.01% bdrv_co_readv_em 0 0% 100% 1529.26MB 48.67% bdrv_co_writev_em 0 0% 100% 88.22MB 2.81% blk_aio_prwv 0 0% 100% 723.08MB 23.01% blk_aio_read_entry 0 0% 100% 62.02MB 1.97% blk_aio_readv 0 0% 100% 1529.26MB 48.67% blk_aio_write_entry 0 0% 100% 26.20MB 0.83% blk_aio_writev 0 0% 100% 723.08MB 23.01% blk_co_preadv 0 0% 100% 1529.26MB 48.67% blk_co_pwritev 0 0% 100% 2252.34MB 71.68% coroutine_trampoline 0 0% 100% 91.18MB 2.90% glib_pollfds_poll 0 0% 100% 61.87MB 1.97% kvm_cpu_exec 0 0% 100% 18.25MB 0.58% kvm_handle_io 0 0% 100% 110.51MB 3.52% main 0 0% 100% 91.19MB 2.90% main_loop 0 0% 100% 91.19MB 2.90% main_loop_wait 0 0% 100% 17.39MB 0.55% mem_add 0 0% 100% 43.61MB 1.39% memory_region_add_eventfd 0 0% 100% 61.87MB 1.97% memory_region_dispatch_write 0 0% 100% 18.24MB 0.58% memory_region_set_enabled 0 0% 100% 61.66MB 1.96% memory_region_transaction_commit 0 0% 100% 61.87MB 1.97% memory_region_write_accessor 0 0% 100% 91.19MB 2.90% os_host_main_loop_wait 0 0% 100% 18.24MB 0.58% pci_data_write 0 0% 100% 18.23MB 0.58% pci_default_write_config 0 0% 100% 18.24MB 0.58% pci_host_config_write_common 0 0% 100% 18.24MB 0.58% pci_host_data_write 0 0% 100% 94.03MB 2.99% qemu_coroutine_create 0 0% 100% 94.03MB 2.99% qemu_coroutine_new 0 0% 100% 61.86MB 1.97% qemu_kvm_cpu_thread_fn 0 0% 100% 16.72MB 0.53% qemu_opts_foreach 0 0% 100% 723.08MB 23.01% qemu_rbd_aio_readv 0 0% 100% 1529.26MB 48.67% qemu_rbd_aio_writev 0 0% 100% 1495.82MB 47.60% qemu_try_blockalign 0 0% 100% 723.08MB 23.01% raw_co_readv 0 0% 100% 1529.26MB 48.67% raw_co_writev_flags 0 0% 100% 2252.34MB 71.68% rbd_start_aio 0 0% 100% 779.33MB 24.80% start_thread 0 0% 100% 88.35MB 2.81% submit_requests 0 0% 100% 91.17MB 2.90% virtio_blk_handle_output 0 0% 100% 18.06MB 0.57% virtio_blk_handle_request 0 0% 100% 91.17MB 2.90% virtio_blk_handle_vq 0 0% 100% 88.35MB 2.81% virtio_blk_submit_multireq 0 0% 100% 43.62MB 1.39% virtio_pci_common_write 0 0% 100% 43.62MB 1.39% virtio_pci_set_host_notifier_internal 0 0% 100% 43.62MB 1.39% virtio_pci_start_ioeventfd 0 0% 100% 91.17MB 2.90% virtio_queue_host_notifier_read 0 0% 100% 91.17MB 2.90% virtio_queue_notify_vq