... is about 5MB stripped, which is not terrible, but also not great. I wrote a trivial Perl script to try to find out what's using the space and the report is attached. Also: $ size -d v2v/virt-v2v text data bss dec hex filename 3580677 1654384 36944 5272005 5071c5 v2v/virt-v2v Main take aways are: Frametables take around 21% of the on-disk space and around 31% of the text, which is a bit surprising. These are added by the OCaml compiler in order to track which stack slots are GC roots. I think the OCaml compiler could do a lot better here and I might raise an upstream bug if I can come up with a small demonstrator. However simply reducing the amount of code linked in helps. Libguestfs bindings are the next big item. Virt-v2v links dynamically to libguestfs.so.0, but the bindings code that translates from OCaml to C and back is linked statically, and it's huge. It's particularly big because we link in every binding (libguestfs has something like 650 entry points), but we only use a handful from virt-v2v. I think we might be able to do something about this. Some OCaml standard libraries are inexplicably big (Scanf? List?!) Most of the rest is actual code in virt-v2v or common/ subdirectory code. Code in particular modules is quite compact eg. Convert_linux which does the bulk of conversion of Linux guests is 24K. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top -------------- next part -------------- Report on v2v/virt-v2v ---------------------- Frametables 1104208 OCaml internal stuff 249892 Libguestfs internal 16587 Libguestfs bindings 247829 Libvirt bindings 46257 Libnbd bindings 40709 Unknown 46869 Modules (largest first) Guestfs 202547 Stdlib.Scanf 45704 Convert_linux 24550 Libvirt 24244 Std_utils 22950 V2v 20684 Create_ovf 20493 Tools_utils 20443 Str 17921 Stdlib.List 17265 Unix 17002 Stdlib.Array 15136 Stdlib.Set 13703 Stdlib.Hashtbl 13415 Stdlib.Map 12642 Create_libvirt_xml 12346 Convert_windows 12215 Stdlib.Bytes 11412 Windows_virtio 10513 Stdlib.Filename 10465 Linux_bootloaders 10193 Output_rhv_upload 9801 Parse_libvirt_xml 9598 OVA 9366 Create_json 9251 Output_openstack 8727 Stdlib.Buffer 8155 Firstboot 7587 Stdlib 7471 Parse_domain_from_vmx 7435 Output_qemu 6970 Linux_kernels 6688 Gettext 6551 NBD 6371 Stdlib.Printexc 5927 Stdlib.String 5794 Parse_vmx 5677 Inspect_source 5383 Utils 5000 Convert 4847 Output_rhv 4790 Types 4679 OVF 4458 Output_vdsm 4226 Nbdkit 4087 Getopt 3974 Stdlib.Random 3878 Linux 3835 Output_libvirt 3775 Input_ova 3481 Input_vddk 3443 VCenter 3204 Nbdkit_vddk 3115 Stdlib.Parsing 3009 DOM 2825 Stdlib.Lexing 2810 Output_json 2711 QemuNBD 2478 UnixLabels 2380 Input_libvirt 2347 Stdlib.Obj 2298 Libosinfo_utils 2261 Nbdkit_ssh 2166 Output_glance 2062 JSON 2009 Stdlib.Seq 1980 Libvirt_utils 1948 JSON_parser 1932 Input_disk 1908 Stdlib.Gc 1832 Registry 1802 Networks 1789 On_exit 1756 Xml 1730 Curl 1697 Input_vcenter_https 1640 Input_vmx 1629 Changeuid 1626 GettextTypes 1603 Input_xen_ssh 1560 Target_bus_assignment 1524 GettextCompat 1481 Output 1468 Stdlib.Nativeint 1447 Stdlib.Int64 1436 Output_disk 1392 Checksums 1370 Stdlib.Int32 1359 SELinux_relabel 1352 Stdlib.Digest 1329 Openstack_image_properties 1317 GettextModules 1294 GettextStub 1293 Nbdkit_curl 1267 Windows 1254 Regedit 1252 Var_expander 1234 PCRE 1119 Stdlib.Sys 1051 Libosinfo 976 Output_null 950 Xpath_helpers 910 GettextFormat 893 Python_script 871 Stdlib.Printf 848 Unix_utils 838 Stdlib.Char 693 Stdlib.Fun 683 GettextFormat_parser 679 Stdlib.Uchar 666 GettextUtils 652 Tools_utils_ 634 GettextCategory 607 StringMap 601 Stdlib.Marshal 566 StringSet 548 Qemuopts 446 C_utils 367 Name_from_disk 353 GettextFormat_lexer. 286 Stdlib.Int 282 GettextConfig 205 Parse_vmx_ 204 Gettext.f 199 Stdlib.Callback 173 Stdlib.Map__seq_of_enum 169 Stdlib.Map__rev_seq_of_enum 169 Gettext.s 159 Gettext.fn 159 Gettext.sn 159 Stdlib.Set__seq_of_enum 145 Stdlib.Set__rev_seq_of_enum 145 GettextFormat_lexer 124 Common_gettext 117 Config 112 Guestfs_config 101 Stdlib.Atomic 82 GettextConfigGen 45 Std_exit 41 Uefi 34 Output_rhv_upload_vmcheck_source 23 Output_rhv_upload_plugin_source 23 Output_rhv_upload_precheck_source 23 Output_rhv_upload_createvm_source 23 Output_rhv_upload_transfer_source 23 Output_rhv_upload_finalize_source 23 Output_rhv_upload_cancel_source 23 GettextStubCompat 6 -------------- next part -------------- A non-text attachment was scrubbed... Name: v2v-binary-size.pl Type: application/x-perl Size: 2658 bytes Desc: not available URL: <http://listman.redhat.com/archives/libguestfs/attachments/20220323/61133108/attachment.pl>