similar to: a question about popen() performance on domU

Dear all, When I debugged the execution performance of an application using strace, I found there are some system calls like open and stat64 which run faster on XenLinux than the standard Linux. The following is the output of running "strace -c /bin/sh -c /bin/echo foo" on both systems. An open call runs averagely 109 usec on standard Linux but only 41 usecs on XenLinux. An stat64

Inspired by libvirt's virCommand* internal mini-library, this adds some internal APIs for running commands. The first patch contains the new APIs. The subsequent patches change various parts of the library over to use it. Rich.

Let''s try that again, without Hotmail''s crappy formatting. Dan, I am one of the developer of the FreeRIDE project (the Ruby IDE) and I''m in charge of the FreeRIDE debugger with which we have had a number of problems on Windows now mostly due to the clunky implementation of IO/Process/Signal stuff on Win32. I recently came across your Win32 utils package and

Adding ntfscat_i command for downloading files based on their inode number. This allows the dowload of files unaccessible otherwise from a NTFS guest disk image. --- daemon/ntfs.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++ generator/actions.ml | 15 +++++++++++++ 2 files changed, 77 insertions(+) diff --git a/daemon/ntfs.c b/daemon/ntfs.c index 568899e..58f62fa 100644

"icat" name comes from the employed command line tool which might be replaced later on with a different implementation. The command name is a bit confusing because it's similar to "cat" but act as "donwload". Therefore I am renaming it with a more clear name. At the same time I cleaned up a bit the code and improved it's readability and code comments. This

Hi, My application uses popen to execute UNIX commands. After I replace rsh with ssh, it stopped working. I have made a test C code to reproduce the problem as attached in this email. In the test program, I called popen for ssh command and then pclose right away. I got the following error: kirk 588$ a.out Write failed flushing stdout buffer. write stdout: Broken pipe Any idea what is

On 22/02/16 17:26, Richard W.M. Jones wrote: > On Sun, Feb 21, 2016 at 11:22:23PM +0200, Matteo Cafasso wrote: >> Adding ntfscat_i command for downloading files based on their inode number. >> >> This allows the dowload of files unaccessible otherwise from a NTFS guest disk image. > The patch seems fine, but it really needs a test otherwise this > feature could silently

Working to get ZFS to run on a minimal Solaris 10 U2 configuration. In this scenario, ZFS is included the miniroot which is booted into RAM. When trying to share one of the filesystems, an assertion is raised - see below. If the version of source on OpenSolaris.org matches Solaris 10 U2, then it looks like it''s associated with a popen of /usr/sbin/share. Can anyone shed any

On Tue, Nov 13, 2018 at 10:04:33AM +0000, Daniel P. Berrangé wrote: > On Fri, Nov 09, 2018 at 12:19:30PM +0000, Richard W.M. Jones wrote: > > Peter Dimitrov and myself were debugging a very peculiar bug when > > libguestfs is run as a plugin from collectd: > > > > https://www.redhat.com/archives/libguestfs/2018-November/thread.html#00023 > > > > The long

I'm embedding flac in a Samba VFS application. flac gets called to decompress files, which Samba serves up to the client as WAV files. Every time a Windows client browses a folder, it opens music files to read the header, and then it closes them without reading the entire file. I'm accessing flac via popen/pclose. Each time I close the pipe to flac 'prematurely' (i.e.

Hi all, When I ran the experiments to compare an application''s execution time in both a domU (named cctest1) and a native Linux machine (named ccn10), I noticed the application executes faster in domU. The host of the domU (named ccn9) and ccn10 are two nodes of a cluster and they have same hardware configurations. domU (cctest1) is created by exporting loopback files from dom0 on

This patch by no means covers all the cases where we run external programs and expect to parse their output without setting LC_ALL=C. But it's a good start. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#)

Hi, I'm still working on this problem by first trying code without the Altivec intrinsics. I'm trying to use the cross compiler on the c code outputted by "llc -march c" and have run into this linker problem (spewed by the cross compiler): Command line : error: L0039: reference to undefined symbol .fopen64 in file /tmp/cc4tgLu5.o Command line : error: L0039: reference to

This is an RFC only, at the very least it lacks tests. This implements a rather complex new feature in nbdkit-curl-plugin allowing you to specify an external shell script that can be used to fetch an authorization token for services which requires a token or cookie for access, especially if that token must be renewed periodically. The motivation can be seen in the changes to the docs in patch 2.

I was extending the virt plugin. It already collects similar data (about VMs) using Libvirt's API, but lacks disk usage information. I went through some hoops to link libguestfs correctly to collectd. Is it okay to just include fork(), waitpid() example? It does reproduce the issue. Best Regards, Peter On Tue, Nov 13, 2018 at 1:34 PM Richard W.M. Jones <rjones@redhat.com> wrote:

Hi guys: I was trying to index a large set of PDF documents using omindex and the system started to run out of forks (sh: fork temporarily unavailable) making the system unusable and probably skipping documents. I'm using MAC Osx Server 10.4.3 (Darwin/BSD) and GCC 4.0. The problem: On function stdout_to_string a popen is called, but is not closed properly (according the popen

I have an Ultra 10 client running Sol10 U3 that has a zfs pool set up on the extra space of the internal ide disk. There''s just the one fs and it is shared with the sharenfs property. When this system reboots nfs/server ends up getting disabled and this is the error from the SMF logs: [ Apr 16 08:41:22 Executing start method ("/lib/svc/method/nfs-server start") ] [ Apr 16

When writing to a RHEV target, virt-v2v launches the libguestfs appliance with euid:egid = 36:36, which is required to write to an NFS target using root_squash. Since the update to use an febootstrap cached appliance, this causes an error on startup as the cached files are owned by root, but the cache directory is owned by 36:36. The reason for this is that execve() resets euid and egid to uid and

--- helper/init.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/helper/init.c b/helper/init.c index 0ca3135..2b5dacf 100644 --- a/helper/init.c +++ b/helper/init.c @@ -163,8 +163,10 @@ main () chdir ("/"); - /* Run /init from ext2 filesystem. */ + mount_proc (); print_uptime (); + + /* Run /init from ext2 filesystem. */ execl

Hi LLVMers, I am a PHD student in CS dept in UIUC, I am doing a project for Vikram's course, it is about PRE. I would like to know why you didn't choose SSAPRE in LLVM, since it seems to be more suitable for LLVM (it can operate directly on SSA form and avoid the conversion between SSA and bit-vector). Can anyone tell me the reason? Xuehai