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2015 Dec 10
3
Memory utilization problems in profile reader
On Wed, Dec 9, 2015 at 3:14 PM, Xinliang David Li <xinliangli at gmail.com>
wrote:
> Can you extract the relevant part of the heap profile data?
>
It's all profile data, actually. The heap utilization is massively
dominated by the profile reader.
> How large is the sample profile data fed to the compiler?
>
>
For this run, the input file was 21Mb.
> The
2012 Dec 14
12
any more efficient way to transfer snapshot between two hosts than ssh tunnel?
Assuming in a secure and trusted env, we want to get the maximum transfer speed without the overhead from ssh.
Thanks.
Fred
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2015 Dec 11
3
Memory utilization problems in profile reader
On Fri, Dec 11, 2015 at 9:58 AM, Diego Novillo <dnovillo at google.com> wrote:
> So, I traced it down to the DenseMaps in class FunctionSamples. I've
> replaced them with two std::vector, and the read operation causes the
> compiler to grow from 70Mb to 280Mb. With the DenseMaps, reading the
> profile causes the compiler to grow from 70Mb to 3Gb.
>
> Somehow the DenseMaps are causing a 10x growth factor. Those keys are
> probably an issue. Or perhaps we just need a different representation for
> sample records and call sites.
>
Yes...
2011 May 15
3
Chainloading pxe boot loaders and dhcp root-path option
...option (option 17) to
the location of your nfs server with the kernel and network filesystem.
I want to support multiple versions of freebsd (i386 and amd64) along with
Linux distros and others. The are hackish ways to accomplish this using
memdisk, but thats not a great idea if you want to have a 280MB live cd
image. The most elegant way I can see to do this is to chain load freebsd's
pxeboot loader from pxelinux. The problem is when you do this, the dhcp
root-path option is not set and defaults to /.
I need to be able to dynamically change this dhcp option before chain
loading into the next...
2015 Oct 15
2
selinux commands fail on low memory box
...d
commands. It's only on the 3rd web server where I seem to have any trouble
at all running the SELinux commands I want to keep the box secure.
On box #3 all SElinux commands end up the same way. For example:
[root at ops3:~] #semodule -i newrelic.pp
Killed
And that happened when I had about 280MB free:
[root at ops3:~] #free -m
total used free shared buff/cache
available
Mem: 490 96 286 28 107
285
Swap: 0 0 0
Typically what I'll do is stop all the main services on this machin...
2007 Oct 08
16
Fileserver performance tests
.../op 27us/op-cpu
12746: 65.266:
IO Summary: 8088 ops 8017.4 ops/s, (997/982 r/w) 155.6mb/s, 508us cpu/op, 0.2ms
12746: 65.266: Shutting down processes
filebench>[/i]
I expected to see some higher numbers really...
a simple "time mkfile 16g lala" gave me something like 280Mb/s.
Would anyone comment on this?
TIA,
Tom
This message posted from opensolaris.org
2015 Oct 15
0
selinux commands fail on low memory box
...web server where I seem to have any trouble
> at all running the SELinux commands I want to keep the box secure.
>
> On box #3 all SElinux commands end up the same way. For example:
>
> [root at ops3:~] #semodule -i newrelic.pp
> Killed
>
> And that happened when I had about 280MB free:
>
> [root at ops3:~] #free -m
> total used free shared buff/cache
> available
> Mem: 490 96 286 28 107
> 285
> Swap: 0 0 0
>
> Typically what I'll do i...
2009 Jun 19
0
yum update bug with disk requirement calculation?
I just updated my machine from CentOS 5.2 to 5.3 and noticed an oddity.
The update required around 280Mb of disk space. I had over 500Mb of free
space on root. And... the update failed with "need more space" errors.
Now I can understand this; normally it would fetch the files from a http
server, so the worst-case requirements are double (or more) than the
download size reported by yum.
E...
2015 Oct 15
1
selinux commands fail on low memory box
...ble
> > at all running the SELinux commands I want to keep the box secure.
> >
> > On box #3 all SElinux commands end up the same way. For example:
> >
> > [root at ops3:~] #semodule -i newrelic.pp
> > Killed
> >
> > And that happened when I had about 280MB free:
> >
> > [root at ops3:~] #free -m
> > total used free shared buff/cache
> > available
> > Mem: 490 96 286 28 107
> > 285
> > Swap: 0 0 0
>...
2007 Aug 13
3
imap memory footprint rather large
...the size of the folder. On the folder
with 70k messages, dovecot seems to allocate 280m of memory, which
it then fills to about 70% during the metadata FETCH, and then keeps
growing while APPEND/SEARCHing the new local messages.
The 70k mailbox is just short of 600Mb in size on disk. Dovecot uses
280Mb to serve it. Is it possible that dovecot is reading too much
into memory, or over-optimising?
Can I somehow tweak this to lower the memory footprint?
Cheers,
--
martin; (greetings from the heart of the sun.)
\____ echo mailto: !#^."<*>"|tr "<*> mailto:&...
2005 Jun 17
3
New Set of High Performance Networking Patches Available
...tication takes place. During authentication the default or user
specified cipher will be used. It should not be very easy to accidental
switch over to NONE in an interactive session. Of course, the user has
to accept that there are additional risks.
We're seeing very good throughput - up to 280Mb/s with the arcfour
cipher. We're actually being limited by the disk speed in this case as
cpu load is still under 60% on our test machines.
You can find the patches here
http://www.psc.edu/networking/projects/hpn-ssh/
Note: All we are doing is allowing SSH to make better use of the network...
2009 May 01
5
New system for recording - SCSI, SAS or SATA?
I'm in the process of specifying the hardware for some new Asterisk
systems which will be running a substantial number of conferences
with recording.
I was wondering what there is to choose between SCSI, SAS and SATA
disks, in terms of performance for this kind of application.
I will be using dual drives with kernel-based software RAID1.
Any advice from experience would be appreciated!
2002 Jan 06
3
sftp/scp performance testing
...sts.
Software:
openssh suite 3.0.2p1
psftp (putty sftp client) latest dev snapshot
pscp (putty scp client) latest dev snapshot
winscp 2.0 beta
cygwin 1.3.6
windows xp
Localhost (client/server on same box)
opensftp - 5.5MB/min
putty sftp - 6MB/min
open scp - 56MB/min
winscp2 - 95MB/min
putty scp - 280MB/min
windows copy - 780MB/min (11 sec)
10mbit LAN (same binaries, both xp machines)
putty sftp - 1.2MB/min
opensftp - 3.9MB/min
winscp2 - 9MB/min
open scp - 50MB/min
putty scp - 65MB/min
windows network copy - 68MB/min
I should also add that these machines are both P3 or better and both have
half...
2011 Jan 05
52
Offline Deduplication for Btrfs
Here are patches to do offline deduplication for Btrfs. It works well for the
cases it''s expected to, I''m looking for feedback on the ioctl interface and
such, I''m well aware there are missing features for the userspace app (like
being able to set a different blocksize). If this interface is acceptable I
will flesh out the userspace app a little more, but I believe the