The first few compiles, using "compile" to invode GNU make,
from within Emacs, run at "command-line speed" but then the overall
time increases. The first 10 compiles are OK, but after about 20 compiles,
a compilation that "time make -k" reports as taking
real 0m0.127s
user 0m0.100s
sys 0m0.016s
takes more than five seconds. Then I give up and restart Emacs, and
everything is fine for another 10 compiles. And so on.
Here is some output from "strace emacs"
socket(PF_FILE, SOCK_STREAM, 0) = 3 <0.000016>
connect(3, {sa_family=AF_FILE, path=@"/tmp/.X11-unix/X0"}, 20) = 0
<0.000015>
Here I attach strace to a running emacs just before i start compilation
and detach as soon as the compilation is done. The first few selects are
probably from before the time I press enter to execute the compile command.
select(4, [3], NULL, NULL, {0, 297904}) = 0 (Timeout) <0.298232>
select(4, [3], NULL, NULL, {0, 498307}) = 0 (Timeout) <0.498832>
select(4, [3], NULL, NULL, {0, 498294}) = 0 (Timeout) <0.498820>
select(4, [3], NULL, NULL, {0, 498292}) = 0 (Timeout) <0.498818>
select(4, [3], NULL, NULL, {0, 498250}) = 0 (Timeout) <0.498776>
select(4, [3], NULL, NULL, {0, 498299}) = 1 (in [3], left {0, 444141})
<0.054181>
select(4, [3], NULL, NULL, {0, 441524}) = 1 (in [3], left {0, 320780})
<0.120760>
select(4, [3], NULL, NULL, {0, 312270}) = 1 (in [3], left {0, 311270})
<0.001084>
select(4, [3], NULL, NULL, {0, 282200}) = 0 (Timeout) <0.282507>
select(4, [3], NULL, NULL, {0, 498525}) = 1 (in [3], left {0, 21105})
<0.477438>
select(4, [3], NULL, NULL, {0, 499408}) = 0 (Timeout) <0.499936>
select(4, [3], NULL, NULL, {0, 498927}) = 1 (in [3], left {0, 272045})
<0.226897>
select(5, [3 4], NULL, NULL, {0, 499323}) = 1 (in [4], left {0, 479747})
<0.019591>
select(5, [3], NULL, NULL, {0, 20000}) = 0 (Timeout) <0.020070>
select(5, [3 4], NULL, NULL, {0, 442695}) = 1 (in [4], left {0, 442690})
<0.000016>
select(5, [3], NULL, NULL, {0, 0}) = 0 (Timeout) <0.000008>
select(4, [3], NULL, NULL, {0, 494042}) = 0 (Timeout) <0.494564> <----
Much waiting here
select(4, [3], NULL, NULL, {0, 498322}) = 0 (Timeout) <0.498847>
select(4, [3], NULL, NULL, {0, 498336}) = 0 (Timeout) <0.498862>
select(4, [3], NULL, NULL, {0, 498261}) = 0 (Timeout) <0.498784>
select(4, [3], NULL, NULL, {0, 498320}) = 0 (Timeout) <0.498847>
select(4, [3], NULL, NULL, {0, 498260}) = 0 (Timeout) <0.498786>
select(4, [3], NULL, NULL, {0, 498325}) = 0 (Timeout) <0.498853>
select(4, [3], NULL, NULL, {0, 498215}) = 0 (Timeout) <0.498737>
select(4, [3], NULL, NULL, {0, 498057}) = 1 (in [3], left {0, 445670})
<0.052400>
select(4, [3], NULL, NULL, {0, 445001}) = 1 (in [3], left {0, 349721})
<0.095295>
select(4, [3], NULL, NULL, {0, 347501}) = 1 (in [3], left {0, 345858})
<0.001656>
select(4, [3], NULL, NULL, {0, 345151}) = 1 (in [3], left {0, 342229})
<0.002978>
select(4, [3], NULL, NULL, {0, 340611}) = 1 (in [3], left {0, 268540})
<0.072088>
select(4, [3], NULL, NULL, {0, 259972}) = 1 (in [3], left {0, 259075})
<0.000975>
select(4, [3], NULL, NULL, {0, 228314}) = 0 (Timeout) <0.228570>
select(4, [3], NULL, NULL, {0, 498550} <unfinished ...>
Environment
Ubuntu 10.04 (and earlier, on 9.04)
Linux: 2.6.32-24-generic
Emacs 23.1.2 (my own emacs build)
Emacs 22.2.1 (Ubuntu package)
Googling, I can find nothing about this problem.
/Lars
-------------------------------------------------------------------
Lars Hamrén Tel...: +46(46)189090
Svensk Datorutveckling e-post: hamren@sdu.se
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