On Thu, Mar 31, 2011 at 04:32:12PM -0400, Thor Lancelot Simon wrote:
On Thu, Mar 24, 2011 at 12:04:02PM +, Andrew Doran wrote:
Try lockstat as suggested to see if something pathological is going on. In
addition to showing lock contention problems it can often highlight a code
path
On Fri, Apr 01, 2011 at 01:05:02PM -0400, Thor Lancelot Simon wrote:
On Thu, Mar 31, 2011 at 04:32:12PM -0400, Thor Lancelot Simon wrote:
On Thu, Mar 24, 2011 at 12:04:02PM +, Andrew Doran wrote:
Try lockstat as suggested to see if something pathological is going on.
In
On 4/1/2011 1:47 PM, Andrew Doran wrote:
On Fri, Apr 01, 2011 at 01:05:02PM -0400, Thor Lancelot Simon wrote:
On Thu, Mar 31, 2011 at 04:32:12PM -0400, Thor Lancelot Simon wrote:
On Thu, Mar 24, 2011 at 12:04:02PM +, Andrew Doran wrote:
Try lockstat as suggested to see if something
On Wed, Mar 23, 2011 at 05:24:12PM -0400, Thor Lancelot Simon wrote:
All cores spend well over 50% time in 'sys', even when all or almost
all are running cc1 processes. The kernel is amd64 -current GENERIC
from about 1 week ago -- no DIAGNOSTIC, DEBUG, KMEMSTATS, LOCKDEBUG,
etc.
I am
On Thu, Mar 31, 2011 at 8:53 PM, Thor Lancelot Simon t...@panix.com wrote:
[...]
I wonder if some tool has reverted to using /var/tmp for its
intermediate files, or similar. Don't see an obvious
culprit for that, however.
gcc uses /var/tmp by default unless you
Andrew Doran a...@netbsd.org wrote:
We have some algorhythms in the scheduler and mutual exclusion code that
aren't designed for large numbers of cores, but I think they should be OK
with 24 CPUs. ...
I have committed mutex_oncpu patch, so it is O(1) in -current.
... (While I'm rambling
On 03/23/11 22:24, Thor Lancelot Simon wrote:
I have a new machine with 24 2Ghz Opteron cores. It has 32GB of RAM.
Building with sources on a fast SSD (preloaded into the page
cache before the build using tar /dev/null) and obj, dest, and rel
dirs on tmpfs, system builds are extraordinarily
On Wed, Mar 23, 2011 at 05:24:12PM -0400, Thor Lancelot Simon wrote:
I have a new machine with 24 2Ghz Opteron cores. It has 32GB of RAM.
Building with sources on a fast SSD (preloaded into the page
cache before the build using tar /dev/null) and obj, dest, and rel
dirs on tmpfs, system
On Thu, Mar 24, 2011 at 04:05:07PM +, Eduardo Horvath wrote:
On Thu, 24 Mar 2011, Andrew Doran wrote:
I have a suspicion that SSD could cause issues for us because the buffer
cache and other parts of the I/O system are not designed with near
instantaneous request-response in mind, but
On Wed, 23 Mar 2011, Thor Lancelot Simon wrote:
I have a new machine with 24 2Ghz Opteron cores. It has 32GB of RAM.
Building with sources on a fast SSD (preloaded into the page
cache before the build using tar /dev/null) and obj, dest, and rel
dirs on tmpfs, system builds are
On Wed, Mar 23, 2011 at 05:24:12PM -0400, Thor Lancelot Simon wrote:
All cores spend well over 50% time in 'sys', even when all or almost
all are running cc1 processes. The kernel is amd64 -current GENERIC
from about 1 week ago -- no DIAGNOSTIC, DEBUG, KMEMSTATS, LOCKDEBUG,
etc.
Does
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