search for: flamegraph

...9; into the code groups in <object>. There's a file view, a function view, a class view, and an inlining view. Each view is sorted by code size, so you can see the largest functions/classes/etc immediately. The *.stats files are just human-readable text files. As it happens, they use the flamegraph format (http://brendangregg.com/flamegraphs.html). This makes it easy to visualize any view as a flamegraph. (If you haven't seen one before, it's a hierarchical visualization where the width of each entry corresponds to its frequency (or in this case size).) To look at code growth between...

...n <object>. There's a file view, a function view, a class view, > and an inlining view. Each view is sorted by code size, so you can see the > largest functions/classes/etc immediately. > > The *.stats files are just human-readable text files. As it happens, they use > the flamegraph format (http://brendangregg.com/flamegraphs.html <http://brendangregg.com/flamegraphs.html>). This makes it > easy to visualize any view as a flamegraph. (If you haven't seen one before, > it's a hierarchical visualization where the width of each entry corresponds to > its fr...

...ere's a file view, a function view, a class view, >> and an inlining view. Each view is sorted by code size, so you can see the >> largest functions/classes/etc immediately. >> >> The *.stats files are just human-readable text files. As it happens, they use >> the flamegraph format (http://brendangregg.com/flamegraphs.html <http://brendangregg.com/flamegraphs.html>). This makes it >> easy to visualize any view as a flamegraph. (If you haven't seen one before, >> it's a hierarchical visualization where the width of each entry corresponds to &gt...

...Sie unter >> https://aka.ms/LearnAboutSenderIdentification?] >> >> Work out which PIDs are high CPU use: >> >> netstat -avp | grep <PID> >> >> gdb -p <PID> >> bt full >> >> strace -p <PID> >> >> as well as a FlameGraph: >> https://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html#Instructions >> >> I would love to get to the bottom of this. >> Andrew Bartlett which would still be useful. Just a sampling of >> gdb -p <PID> >> bt full would confirm where the server wa...

...September/241873.html Can you, on the instance with the high-cpu use, at the time it is in that state, run (matching the commands our mailing list user has run): Work out which PIDs are high CPU use: netstat -avp | grep <PID> gdb -p <PID> bt full strace -p <PID> as well as a FlameGraph: https://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html#Instructions I would love to get to the bottom of this. Andrew Bartlett -- Andrew Bartlett (he/him) https://samba.org/~abartlet/ Samba Team Member (since 2001) https://samba.org Samba Team Lead, Catalyst IT https://catalyst....

...use, at the time it is in > that state, run (matching the commands our mailing list user has > run): > > Work out which PIDs are high CPU use: > > netstat -avp | grep <PID> > > gdb -p <PID> > bt full > > strace -p <PID> > > as well as a FlameGraph: > https://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html#Instructions > > I would love to get to the bottom of this. > Andrew Bartlett > > > -- > Andrew Bartlett (he/him)?????? https://samba.org/~abartlet/ > Samba Team Member (since 2001) https://samba.org >...

hello, I often have the problem of high load on the LDAP processes. 1-3 LDAP processes cause 100% cpu load for approx. 10 sec. This happens regularly in intervals of 2-3 minutes. How can I find out which client is causing this load and why? How can I configure the logging to see who/what is causing the LDAP process? We have about 5000 users, 4000 clients in our AD with 4 DCs with Samba 4.16.4.

...> Someone have problem with samba4 with centos cpu 100%. ? > > > > Attached my config. > > Where is it spinning? > > With all the required debug packages installed, then run it under > perf > and generate a flame graph per: > > http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html > > The resulting .svg file is often quite enlightening. > > Andrew Bartlett Also, how many users, groups and in particular group members in each group (and in total)? If you have large numbers of group members, then Samba 4.5 will help a lot. Thanks, --  Andr...

On 23/09/2019 20:41, Andrew Bartlett wrote: > On Mon, 2019-09-23 at 11:25 +0200, Francesco Malvezzi via samba wrote: >> hi all, >> >> I updated a small domain with 8k object to samba-4.11.0 and the >> database >> conversion from v1 to v2 didn't take a noticeable time. >> >> On the other hand, in a larger domain with 67k object, where the >>

...convert src dest file both on the host and guestvm was comprable) being the issue. Next I profiled both sshd and qemu-img during the conversion phase using bpftools (profile and tcptop) and this is what i see. Time (min) File Size (KB) sshd RX (KB) tcptop qemu-img RX (KB) tcptop profile (flamegraph) 0 - 5 5478400 5612971 5601536 qemu-img-0-5.svg 5 - 10 8365440 (+2887040) 5669043 5656517 qemu-img-5-10.svg 10 - 15 8423296 (+57856) 5722376 5708926 qemu-img-10-15.svg 15 - 20 9472128(+1048832) 5708230 5693710 qemu-img-15-20.svg 20 - 25 9540992(+68864) 5723629 5712002 qemu-...

thanks Richard, The experiment was indeed done with nested VM enabled. I am not sure about the internals, but i thought once overlay is setup the 2 main processes are sshd and qemu-img convert (reading data from sshd and doing the conversion) I don't see any of the qemu process running. Initial overlay setup was pretty quick and rest of the time was spent in qemu-img convert operation Suresh

...ime analyzing code and profiling, rather than speculating. The machine where I tried to link clang using lld is an 8-core Xeon, but I hardly was able to use more than two cores. I ran my tests on UFS + 7200rpm disk ( I can provide details, if needed). The OS is FreeBSD-11 from a month ago or such. Flamegraph results (now zoomable): https://people.freebsd.org/~davide/llvm/lld.svg Nick, to answer your question DenseMap ops are a generally an hotspot for this kind of workload, although grow() operations aren't particularly a big problem (at least in this case). I see them showing up only for addRefer...

...ntos cpu 100%. ? > > > > > > Attached my config. > > > > Where is it spinning? > > > > With all the required debug packages installed, then run it under > > perf > > and generate a flame graph per: > > > > http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html > > > > The resulting .svg file is often quite enlightening. > > > > Andrew Bartlett > > Also, how many users, groups and in particular group members in each > group (and in total)? > > If you have large numbers of group members, then Samb...

Hello, im authenticating my Owncloud aigainst one of my three domain controller and add a second one of it as failover. The authentication works pretty well. When im trying to share files or folders i have the problem, that it takes a lot of time until i get the username i want to share. Compared to my open ldap the samba4 ad needs about 10-15 seconds more to find a result, thats pretty

.... Thanks for confirming that. I think you are probably hitting some pathological behaviours at the TDB layer when handling so many records, perhaps in the free list. The way to debug this, if you are keen to, is to do a debug build of Samba run get a flame graph per: http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html#Instructions That will get us a better idea of which routines are 'hot' during your in-place upgrade. I do wish you the very best with this and am keen to ensure this works really well for you. Andrew Bartlett -- Andrew Bartlett https://samba.o...

Thanks Rowland for the Reply On 04/11/20 5:44 pm, Rowland penny via samba wrote: > On 04/11/2020 12:02, Biswajit Banerjee via samba wrote: >> My Apologies >> >> It is? Windows 2008 AD >> > In which case, it should work, so what OS are you using ? Centos 8 > > Are you using OS samba packages or have you compiled Samba yourself ? Complied > > All you really

...duration. It certainly wasn't meant to be a 5-hour offline operation, even for massive databases. If anyone in this thread is able to put the upgrade under a perf and produce a flame graph, that would be an awesome start to understanding what has gone wrong here. http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html#Instructions I'm assuming this is on TDB and not LMDB? Thanks! Andrew Bartlett -- Andrew Bartlett http://samba.org/~abartlet/ Authentication Developer, Samba Team http://samba.org Samba Developer, Catalyst IT http://catalyst.net.nz/servic...

Am 05.03.20 um 10:48 schrieb Stefan G. Weichinger via samba: > Am 05.03.20 um 10:40 schrieb Rowland penny via samba: >> On 05/03/2020 08:34, Stefan G. Weichinger via samba wrote: > >>> downgrade or fix ;-)? ? >>> >> This hit me yesterday, restart the DC, check with 'ps ax' and I think >> you will find that only 'Samba' has started. If so

Hi Group, i have 3 DC with samba4 with Centos 7, they are showing the CPU with 100% in all DC. The centos 7 is the basic installation and samba4 compile.I have 2.000 machine authenticated in this DC, is WinX, Win7, Win8 and Win10 . Someone have problem with samba4 with centos cpu 100%. ? Attached my config. Tks. -------------- next part -------------- Press enter to see a dump of your service

I spent a week to optimize LLD performance and just wanted to share things what I found. Also if there's anyone who have a good idea on how to make it faster, I'd like to hear. My focus is mainly on Windows, but my optimizations are generally platform neutral. I aim both single-thread and multi-thread performance. r231434 <http://reviews.llvm.org/rL231454> is a change that has the