Cool. Just FYI, did a quick run on two machines and got sane results
(maximums near what I'd expect). First is generic kernel, second is
-RT w/ NO_HZ_FULL & CPU isolation.
1. Desktop (Ivy Bridge , default 3.8.0-31-generic ubuntu 13 kernel)
$ sudo ./npt -n 100 -l 5234567890 -p 80 -e
# CPU affinity set on CPU 1
# Application priority set to 80
# CPU frequency (evaluation): 2594.10 MHz
# Running for 5234567890 loops.. Please wait.
5234567890 loops done.
Loops duration:
min: 0.004626 us
max: 303.812622 us
mean: 0.031345 us
sum: 164075829.870756 us
variance: 0.00079042 us
std dev: 0.028114 us
--------------------------
duration (us) nb. loops
--------------------------
0 5234494969
1 3629
2 8119
3 15105
4 4112
5 5200
6 1013
7 2176
8 29702
9 1929
10 910
11 309
12 241
13 179
14 47
15 23
16 26
17 22
18 13
19 18
20 31
21 48
22 20
23 6
24 3
25 5
26 3
27 4
28 2
29 4
30 2
31 4
32 2
33 2
34 5
35 1
36 1
39 1
41 1
48 1
56 1
303 1
--------------------------
Overruns (1000000+): 0
2. Server (3.10.10-rt7, isolcpus / NO_HZ_FULL / rcu thread offloading
/ ftrace built, not enabled)
$ sudo ./npt -n 100 -a 10 -l 5234567890 -p80
# CPU affinity set on CPU 10
# Application priority set to 80
# CPU frequency (/proc/cpuinfo): 1995.18 MHz
# Running for 5234567890 loops.. Please wait.
5234567890 loops done.
Loops duration:
min: 0.014034 us
max: 31.275311 us
mean: 0.024035 us
sum: 125811537.493472 us
variance: 0.000198279 us
std dev: 0.014081 us
--------------------------
duration (us) nb. loops
--------------------------
0 5234536424
1 9870
2 7926
3 2048
4 200
5 30
6 22
7 1491
8 8666
9 307
10 330
11 31
12 1
14 5
15 19
16 103
17 308
18 11
22 7
23 25
24 63
25 1
31 2
--------------------------
Overruns (1000000+): 0
To generate a little load I just did this during both tests:
$ sudo find / -type f -exec md5sum "{}" \; > /dev/null 2>&1
As well as
$ sudo ping -i 0.001 localhost
On Tue, Oct 15, 2013 at 11:46 AM, Raphaël Beamonte
<raphael.beamonte@xxxxxxxxx> wrote:
> On 2013-10-14 18:04, Aaron Fabbri wrote:
>> Thanks for sharing this, will check it out if I get a chance. Do you
>> have a http git url that I can clone? I'm behind a firewall.
>
> Hello Aaron,
>
> Thanks for your interest!
> It is now possible to clone the repository using http:
> git clone http://git.dorsal.polymtl.ca/git/npt.git
>
> Regards,
> Raphaël
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
