➜ /tmp pprof --alloc_space --text /data/apps/qemu-kvm/x86_64-softmmu/qemu-system-x86_64 profile.0004.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 1152.92MB, 100% of 1153.38MB total Dropped 772 nodes (cum <= 5.77MB) flat flat% sum% cum cum% 513.84MB 44.55% 44.55% 513.84MB 44.55% qemu_try_memalign 487.91MB 42.30% 86.85% 489.13MB 42.41% [librados.so.2.0.0] 149.29MB 12.94% 99.80% 149.30MB 12.94% [libglib-2.0.so.0.4200.2] 1.11MB 0.096% 99.89% 273.32MB 23.70% [libceph-common.so.0] 0.67MB 0.058% 100% 217.60MB 18.87% [librbd.so.1.12.0] 0.08MB 0.0072% 100% 271.38MB 23.53% [libstdc++.so.6.0.19] 0 0% 100% 429.40MB 37.23% 0 0% 100% 334.16MB 28.97% __clone 0 0% 100% 721.72MB 62.57% __correctly_grouped_prefixwc 0 0% 100% 97.30MB 8.44% __libc_start_main 0 0% 100% 97.29MB 8.44% _start 0 0% 100% 61.87MB 5.36% access_with_adjusted_size 0 0% 100% 61.87MB 5.36% address_space_rw 0 0% 100% 43.39MB 3.76% address_space_update_ioeventfds 0 0% 100% 18.07MB 1.57% address_space_update_topology 0 0% 100% 17.39MB 1.51% address_space_update_topology_pass 0 0% 100% 61.87MB 5.36% address_space_write 0 0% 100% 61.87MB 5.36% address_space_write_continue 0 0% 100% 77.95MB 6.76% aio_ctx_dispatch 0 0% 100% 77.95MB 6.76% aio_dispatch 0 0% 100% 287.21MB 24.90% bdrv_aligned_preadv 0 0% 100% 434.51MB 37.67% bdrv_aligned_pwritev 0 0% 100% 287.21MB 24.90% bdrv_co_do_preadv 0 0% 100% 434.51MB 37.67% bdrv_co_do_pwritev 0 0% 100% 287.21MB 24.90% bdrv_co_do_readv 0 0% 100% 721.72MB 62.57% bdrv_co_io_em 0 0% 100% 287.21MB 24.90% bdrv_co_readv 0 0% 100% 287.21MB 24.90% bdrv_co_readv_em 0 0% 100% 434.51MB 37.67% bdrv_co_writev_em 0 0% 100% 13.64MB 1.18% bdrv_open 0 0% 100% 13.58MB 1.18% bdrv_open_common 0 0% 100% 13.64MB 1.18% bdrv_open_inherit 0 0% 100% 76.03MB 6.59% blk_aio_prwv 0 0% 100% 287.21MB 24.90% blk_aio_read_entry 0 0% 100% 61.02MB 5.29% blk_aio_readv 0 0% 100% 434.51MB 37.67% blk_aio_write_entry 0 0% 100% 15.01MB 1.30% blk_aio_writev 0 0% 100% 287.21MB 24.90% blk_co_preadv 0 0% 100% 434.51MB 37.67% blk_co_pwritev 0 0% 100% 13.67MB 1.18% blk_new_open 0 0% 100% 13.65MB 1.18% blockdev_init 0 0% 100% 721.72MB 62.57% coroutine_trampoline 0 0% 100% 13.66MB 1.18% drive_init_func 0 0% 100% 13.66MB 1.18% drive_new 0 0% 100% 77.97MB 6.76% glib_pollfds_poll 0 0% 100% 61.87MB 5.36% kvm_cpu_exec 0 0% 100% 18.25MB 1.58% kvm_handle_io 0 0% 100% 97.30MB 8.44% main 0 0% 100% 77.97MB 6.76% main_loop 0 0% 100% 77.97MB 6.76% main_loop_wait 0 0% 100% 17.39MB 1.51% mem_add 0 0% 100% 43.61MB 3.78% memory_region_add_eventfd 0 0% 100% 61.87MB 5.36% memory_region_dispatch_write 0 0% 100% 18.24MB 1.58% memory_region_set_enabled 0 0% 100% 61.66MB 5.35% memory_region_transaction_commit 0 0% 100% 61.87MB 5.36% memory_region_write_accessor 0 0% 100% 77.97MB 6.76% os_host_main_loop_wait 0 0% 100% 18.24MB 1.58% pci_data_write 0 0% 100% 18.23MB 1.58% pci_default_write_config 0 0% 100% 18.24MB 1.58% pci_host_config_write_common 0 0% 100% 18.24MB 1.58% pci_host_data_write 0 0% 100% 12.94MB 1.12% phys_map_node_reserve 0 0% 100% 12.94MB 1.12% phys_page_set 0 0% 100% 6.25MB 0.54% qcow2_cache_create 0 0% 100% 12.38MB 1.07% qcow2_open 0 0% 100% 6.25MB 0.54% qcow2_update_options 0 0% 100% 6.25MB 0.54% qcow2_update_options_prepare 0 0% 100% 82.02MB 7.11% qemu_coroutine_create 0 0% 100% 82.02MB 7.11% qemu_coroutine_new 0 0% 100% 61.87MB 5.36% qemu_kvm_cpu_thread_fn 0 0% 100% 16.72MB 1.45% qemu_opts_foreach 0 0% 100% 287.21MB 24.90% qemu_rbd_aio_readv 0 0% 100% 434.51MB 37.67% qemu_rbd_aio_writev 0 0% 100% 513.32MB 44.51% qemu_try_blockalign 0 0% 100% 287.21MB 24.90% raw_co_readv 0 0% 100% 434.51MB 37.67% raw_co_writev_flags 0 0% 100% 721.72MB 62.57% rbd_start_aio 0 0% 100% 13.22MB 1.15% register_multipage 0 0% 100% 334.16MB 28.97% start_thread 0 0% 100% 76.08MB 6.60% submit_requests 0 0% 100% 77.94MB 6.76% virtio_blk_handle_output 0 0% 100% 14.01MB 1.22% virtio_blk_handle_request 0 0% 100% 77.94MB 6.76% virtio_blk_handle_vq 0 0% 100% 76.08MB 6.60% virtio_blk_submit_multireq 0 0% 100% 43.62MB 3.78% virtio_pci_common_write 0 0% 100% 43.62MB 3.78% virtio_pci_set_host_notifier_internal 0 0% 100% 43.62MB 3.78% virtio_pci_start_ioeventfd 0 0% 100% 77.94MB 6.76% virtio_queue_host_notifier_read 0 0% 100% 77.94MB 6.76% virtio_queue_notify_vq