I posted this to freebsd-performance, but have as yet not satisfactorily
answered the question. Since it is primarily network related, I'm
reposting it here.
I have been doing some benchmarking as a part of some driver development work,
and have encountered a phenomenon I can't explain. I am us
I notice that there are some poorly defined default values:
dev/nge/if_nge.c:
CSR_WRITE_4(sc, NGE_IHR, 0x01);
dev/nge/if_nge_reg.h:
#define NGE_RX_LIST_CNT 128
#define NGE_TX_LIST_CNT 128
net/if.h:
#defineIFQ_MAXLEN 50
netinet/ip_input.c:
static int ipqmaxlen = IFQ_MA
Is there an easy way to enable or disable pause frames and autonegotiation
of flow control for the em driver? (other than changing em_fc_full to
em_fc_none and recompiling).
Something similar to linux's "ethtool" command, or an ifconfig parameter
is the type of thing I'm after.
(And yes, I've
Why not just fix the protocols which do unaligned accesses? Is speedup of
doing non-byte-wide reads when manipulating packet headers really larger
than the cost of aligning everything? I doubt it.
Your average tcp packet shoule only cause a few unaligned accesses anyway,
so we are putting in a
On Sat, 11 Feb 2006, dima wrote:
There are several software (FreeBSD specific) options though:
1. You should surely try polling(4). 50kpps mean 5 interrupts and
the same amount of context switches, which are quite expensive.
While this was true in the 80's, it is blatantly wrong for any
On Thu, 27 Apr 2006, Robert Watson wrote:
Yes -- basically, what this setting does is turn a deferred dispatch of the
protocol level processing into a direct function invocation.
This reminds me of a problem I saw about a year ago, where the number of
entries in the DMA ring was much greater (
I'm trying to set up a small cluster of diskless boxes using FreeBSD 6.1.
So Far, PXE loads pxeboot which loads the kernel.
But the kernel stops in the middle of booting for no apparent reason. The
last thing on the console is "Timecounters tick every 1.000 msec", which
usually occurs just bef
make sure you have this: -rw-r--r-- 1 root wheel diskless_root/etc/rc
diskless_root/etc/rc:
/bin/sh #which points your rc file to shell so that you are your own rc!
While that is a useful tip, the NFS trace shows that the kernel doesn't
even try to read any files. The last thing that gets re
On Thu, 1 Jun 2006 [EMAIL PROTECTED] wrote:
I'm trying to set up a small cluster of diskless boxes using FreeBSD 6.1.
So Far, PXE loads pxeboot which loads the kernel.
But the kernel stops in the middle of booting for no apparent reason. The
last thing on the console is "Timecounters tick eve
On Thu, 3 Aug 2006, Antony Mawer wrote:
Is there any interest or plans underway to port the trunk(4) feature from
OpenBSD? OpenBSD's trunk(4) appears to be exactly what I'm looking for, but
there doesn't appear to be anything I can find on a port to FreeBSD.
http://www.openbsd.org/cgi-bin/m
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