Re: MSI-X limitation in freebsd 8.2

2012-06-22 Thread John Baldwin
On Friday, June 22, 2012 6:25:23 am Venkat Duvvuru wrote: > and no matter in which order I bring up the interfaces, the system becomes > sluggish after the 5th interface is brought up. So doesn't look like a > specific driver issue. Humm. Would it be possible to use KTR_SCHED and capture a ktr du

Re: MSI-X limitation in freebsd 8.2

2012-06-22 Thread Venkat Duvvuru
and no matter in which order I bring up the interfaces, the system becomes sluggish after the 5th interface is brought up. So doesn't look like a specific driver issue. On Fri, Jun 22, 2012 at 2:25 PM, Venkat Duvvuru wrote: > This setup has variety of NICs, Intel's, Emulex's and all are stock > d

Re: MSI-X limitation in freebsd 8.2

2012-06-22 Thread Venkat Duvvuru
This setup has variety of NICs, Intel's, Emulex's and all are stock drivers. /Venkat On Thu, Jun 21, 2012 at 7:17 PM, John Baldwin wrote: > On Thursday, June 21, 2012 8:50:06 am Venkat Duvvuru wrote: > > While I'm able to ping to the machine..every command on the current > active > > session is

Re: MSI-X limitation in freebsd 8.2

2012-06-21 Thread John Baldwin
On Thursday, June 21, 2012 8:50:06 am Venkat Duvvuru wrote: > While I'm able to ping to the machine..every command on the current active > session is sluggish infact doesn't complete, unable to open another ssh > session..an already opened ssh session doesn't react which is running > "systat -vmsta

Re: MSI-X limitation in freebsd 8.2

2012-06-21 Thread Venkat Duvvuru
I suspected the hardware hence installed Linux and cross verified that Linux is working fine. /Venkat On Thu, Jun 21, 2012 at 6:20 PM, Venkat Duvvuru wrote: > While I'm able to ping to the machine..every command on the current active > session is sluggish infact doesn't complete, unable to open

Re: MSI-X limitation in freebsd 8.2

2012-06-21 Thread Venkat Duvvuru
While I'm able to ping to the machine..every command on the current active session is sluggish infact doesn't complete, unable to open another ssh session..an already opened ssh session doesn't react which is running "systat -vmstat"... The only thing I could do is to successfully complete "top -P

Re: MSI-X limitation in freebsd 8.2

2012-06-21 Thread John Baldwin
On Thursday, June 21, 2012 5:47:48 am Venkat Duvvuru wrote: > John - Thanks for the reply. > > All the CPUs are ~100% idle. I don't see any interrupt storm on any of the > irqs (vmstat -i). > > One observation I made is that I see messages like these in dmesg > > ===> mem 0xfaf6-0xfaf7,0

Re: MSI-X limitation in freebsd 8.2

2012-06-21 Thread Venkat Duvvuru
John - Thanks for the reply. All the CPUs are ~100% idle. I don't see any interrupt storm on any of the irqs (vmstat -i). One observation I made is that I see messages like these in dmesg ===> mem 0xfaf6-0xfaf7,0xfaf4-0xfaf5,0xfaf1c000-0xfaf1 irq 40 at device 0.1 on pci6 Loo

Re: MSI-X limitation in freebsd 8.2

2012-06-20 Thread John Baldwin
On Wednesday, June 20, 2012 6:47:34 am Venkat Duvvuru wrote: > Hi, > MSI-x supports upto 2048 vectors but what I see in freebsd 8.2 is that when > I use more than ~30 vectors, system becomes dead slow. > Is there a limitation on number of msi vectors that can be used in 8.2? FreeBSD/x86 supports r

MSI-X limitation in freebsd 8.2

2012-06-20 Thread Venkat Duvvuru
Hi, MSI-x supports upto 2048 vectors but what I see in freebsd 8.2 is that when I use more than ~30 vectors, system becomes dead slow. Is there a limitation on number of msi vectors that can be used in 8.2? /Venkat ___ freebsd-net@freebsd.org mailing lis