➜ /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 1553.18MB, 100% of 1553.64MB total Dropped 770 nodes (cum <= 7.77MB) flat flat% sum% cum cum% 713.84MB 45.95% 45.95% 713.84MB 45.95% qemu_try_memalign 697.59MB 44.90% 90.85% 698.81MB 44.98% [librados.so.2.0.0] 139.77MB 9.00% 99.84% 139.77MB 9.00% [libglib-2.0.so.0.4200.2] 1.10MB 0.071% 99.91% 373.45MB 24.04% [libceph-common.so.0] 0.80MB 0.051% 100% 327.37MB 21.07% [librbd.so.1.12.0] 0.09MB 0.0055% 100% 371.40MB 23.91% [libstdc++.so.6.0.19] 0 0% 100% 520.13MB 33.48% 0 0% 100% 434.41MB 27.96% __clone 0 0% 100% 1031.24MB 66.38% __correctly_grouped_prefixwc 0 0% 100% 87.78MB 5.65% __libc_start_main 0 0% 100% 87.77MB 5.65% _start 0 0% 100% 61.87MB 3.98% access_with_adjusted_size 0 0% 100% 61.87MB 3.98% address_space_rw 0 0% 100% 43.38MB 2.79% address_space_update_ioeventfds 0 0% 100% 18.07MB 1.16% address_space_update_topology 0 0% 100% 17.39MB 1.12% address_space_update_topology_pass 0 0% 100% 61.87MB 3.98% address_space_write 0 0% 100% 61.87MB 3.98% address_space_write_continue 0 0% 100% 68.44MB 4.41% aio_ctx_dispatch 0 0% 100% 68.44MB 4.41% aio_dispatch 0 0% 100% 379.19MB 24.41% bdrv_aligned_preadv 0 0% 100% 652.05MB 41.97% bdrv_aligned_pwritev 0 0% 100% 379.19MB 24.41% bdrv_co_do_preadv 0 0% 100% 652.05MB 41.97% bdrv_co_do_pwritev 0 0% 100% 379.19MB 24.41% bdrv_co_do_readv 0 0% 100% 1031.24MB 66.38% bdrv_co_io_em 0 0% 100% 379.19MB 24.41% bdrv_co_readv 0 0% 100% 379.19MB 24.41% bdrv_co_readv_em 0 0% 100% 652.05MB 41.97% bdrv_co_writev_em 0 0% 100% 13.64MB 0.88% bdrv_open 0 0% 100% 13.58MB 0.87% bdrv_open_common 0 0% 100% 13.64MB 0.88% bdrv_open_inherit 0 0% 100% 66.05MB 4.25% blk_aio_prwv 0 0% 100% 379.19MB 24.41% blk_aio_read_entry 0 0% 100% 60.04MB 3.86% blk_aio_readv 0 0% 100% 652.05MB 41.97% blk_aio_write_entry 0 0% 100% 379.19MB 24.41% blk_co_preadv 0 0% 100% 652.05MB 41.97% blk_co_pwritev 0 0% 100% 13.67MB 0.88% blk_new_open 0 0% 100% 13.65MB 0.88% blockdev_init 0 0% 100% 1031.24MB 66.38% coroutine_trampoline 0 0% 100% 13.66MB 0.88% drive_init_func 0 0% 100% 13.66MB 0.88% drive_new 0 0% 100% 68.45MB 4.41% glib_pollfds_poll 0 0% 100% 61.87MB 3.98% kvm_cpu_exec 0 0% 100% 18.25MB 1.17% kvm_handle_io 0 0% 100% 87.78MB 5.65% main 0 0% 100% 68.45MB 4.41% main_loop 0 0% 100% 68.45MB 4.41% main_loop_wait 0 0% 100% 17.39MB 1.12% mem_add 0 0% 100% 43.61MB 2.81% memory_region_add_eventfd 0 0% 100% 61.87MB 3.98% memory_region_dispatch_write 0 0% 100% 18.24MB 1.17% memory_region_set_enabled 0 0% 100% 61.66MB 3.97% memory_region_transaction_commit 0 0% 100% 61.87MB 3.98% memory_region_write_accessor 0 0% 100% 68.45MB 4.41% os_host_main_loop_wait 0 0% 100% 18.24MB 1.17% pci_data_write 0 0% 100% 18.23MB 1.17% pci_default_write_config 0 0% 100% 18.24MB 1.17% pci_host_config_write_common 0 0% 100% 18.24MB 1.17% pci_host_data_write 0 0% 100% 12.94MB 0.83% phys_map_node_reserve 0 0% 100% 12.94MB 0.83% phys_page_set 0 0% 100% 12.38MB 0.8% qcow2_open 0 0% 100% 72.02MB 4.64% qemu_coroutine_create 0 0% 100% 72.02MB 4.64% qemu_coroutine_new 0 0% 100% 61.86MB 3.98% qemu_kvm_cpu_thread_fn 0 0% 100% 16.72MB 1.08% qemu_opts_foreach 0 0% 100% 379.19MB 24.41% qemu_rbd_aio_readv 0 0% 100% 652.05MB 41.97% qemu_rbd_aio_writev 0 0% 100% 713.32MB 45.91% qemu_try_blockalign 0 0% 100% 379.19MB 24.41% raw_co_readv 0 0% 100% 652.05MB 41.97% raw_co_writev_flags 0 0% 100% 1031.24MB 66.38% rbd_start_aio 0 0% 100% 13.22MB 0.85% register_multipage 0 0% 100% 434.42MB 27.96% start_thread 0 0% 100% 66.10MB 4.25% submit_requests 0 0% 100% 68.44MB 4.41% virtio_blk_handle_output 0 0% 100% 68.44MB 4.41% virtio_blk_handle_vq 0 0% 100% 66.10MB 4.25% virtio_blk_submit_multireq 0 0% 100% 43.62MB 2.81% virtio_pci_common_write 0 0% 100% 43.62MB 2.81% virtio_pci_set_host_notifier_internal 0 0% 100% 43.62MB 2.81% virtio_pci_start_ioeventfd 0 0% 100% 68.44MB 4.41% virtio_queue_host_notifier_read 0 0% 100% 68.44MB 4.41% virtio_queue_notify_vq