On 18.06.2008 17:32, Fergus Henderson wrote:
On Wed, Jun 18, 2008 at 7:22 AM, <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi,
when given a list of hosts in DISTCC_HOSTS, e.g.
DISTCC_HOSTS="host1/6 host2/2 host3/3"
The documentation states that the hosts are given priority as specified,
so host1 is the preferred host. I looked at the distcc code and was
surprised to find that this "list of preference" is interpreted somewhat
differently than I expected.
I think you have misread the code.
(Which distcc version are you using? Though this code hasn't changed
between distcc 2.18.3 and distcc 3.0.)
The code does the following (this is in dcc_lock_one() in src/where.c):
while (1) {
for (i_cpu = 0; i_cpu < 50; i_cpu++) {
for (h = hostlist; h; h = h->next) {
The middle loop is over slot number. The inner loop is over hosts.
It tries slot 0, host 0, and then slot 0, host 1, and then slot 0, host
2, etc.
before trying slot 1, host 1, and then slot 1, host 1, and then slot 1,
host 2, etc.
Well,
I don't think Thomas has misread the code: I understand he says the same
thing as you.
But distcc's man page says: "distcc prefers hosts towards the start of
the list, so machines should be listed in descending order of speed."
I understand this statement the same way as Thomas, that is:
host0_slot0, host0_slot1, host0_slot2, host1_slot0, host1_slot1, ....
which is not what the actual code does.
Christophe
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