added Auswertung.md

modified README.md

README.md

@@ -1,2 +1,2 @@
-# resy-ss17-template
+# resy-ss17-grp1
 Template for grp repositories

V1/led5/src/main.rs

@@ -81,9 +81,7 @@ fn main() {
     chan_select! {
         rpanic.recv() => { },
         signal.recv() -> signal => {
-            #[cfg(debug_assertions)]
             println!("received signal: {:?}", signal);
-
             sdone.send(());
         }
     }

V1/switch.c

@@ -0,0 +1,102 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#define BASEPATH "/sys/class/gpio/"
+#define GPIO_FOLDER "gpio%s/"
+
+#define PIN_BUTTON "17"
+#define PIN_LED "18"
+
+#define LED_ON 0
+#define LED_OFF 1
+
+#define BUTTON_PRESSED 0
+#define BUTTON_RELEASED 1
+
+void writeFile(char *filename, char *buffer, size_t count)
+{
+    int fd = open(filename, O_WRONLY);
+    write(fd, buffer, count);
+    close(fd);
+}
+
+void registerPin(char *pin)
+{
+    writeFile(BASEPATH "export", pin, strlen(pin));
+}
+
+void freePin(char *pin)
+{
+    writeFile(BASEPATH "unexport", pin, strlen(pin));
+}
+
+void setDirection(char *pin, char *direction, int dirlen)
+{
+    char path[50];
+    sprintf(path, BASEPATH GPIO_FOLDER "direction", pin);
+    writeFile(path, direction, dirlen);
+}
+
+void registerInput(char *pin)
+{
+    registerPin(pin);
+    setDirection(pin, "in", 2);
+}
+
+void registerOutput(char *pin)
+{
+    registerPin(pin);
+    setDirection(pin, "out", 3);
+}
+
+int readInput(char *pin)
+{
+    char path[50];
+    int state;
+    sprintf(path, BASEPATH GPIO_FOLDER "value", pin);
+    FILE *fd = fopen(path, "r");
+    fscanf(fd, "%i", &state);
+    fclose(fd);
+    return state;
+}
+
+void writeOutput(char *pin, int state)
+{
+    char path[50];
+    sprintf(path, BASEPATH GPIO_FOLDER "value", pin);
+    FILE *fd = fopen(path, "w");
+    fprintf(fd, "%i", state);
+    fclose(fd);
+}
+
+int main()
+{
+    struct timespec sleeptime, sleepremain;
+    int oldstate = BUTTON_PRESSED;
+    int state;
+    int count = 0;
+    registerInput(PIN_BUTTON);
+    registerOutput(PIN_LED);
+    sleeptime.tv_sec = 0;
+    sleeptime.tv_nsec = 1000000;
+    while (1)
+    {
+        nanosleep(&sleeptime, &sleepremain);
+        state = readInput(PIN_BUTTON);
+        if (state == BUTTON_PRESSED && oldstate == BUTTON_RELEASED)
+        {
+            count++;
+            printf("Number of button pushes: %i\n", count);
+        }
+
+        if (state == BUTTON_PRESSED)
+            writeOutput(PIN_LED, LED_ON);
+        else
+            writeOutput(PIN_LED, LED_OFF);
+
+        oldstate = state;
+    }
+}

V2/delay/.gitignore

@@ -0,0 +1 @@
+*.eps

V2/delay/Auswerung.md

@@ -0,0 +1,41 @@
+# Auswertung
+
+
+
+## No Load
+
+
+
+### No Realtime
+
+Läuft der Prozess ohne Load und Realtime so liegt das Delay im Mean bei etwa **100µs**.
+Der Ausreiser bei *11.000µs* Sleep Periode lässt sich durch eine kurze zeitigte Last durch einen Hintergrundprozess erklären, da bei jeder Messung (100 Durchläufe) immer der Worst Case betrachtet wird.
+
+![delay_idle](delay_idle.png)
+
+### Realtime
+
+Im Vergleich dazu sinkt bei aktiver Realtime Priorität das Mean Delay auf etwa **25µs**.
+
+Hier gibt es dafür mehr Ausreiser welche aber nicht über **190µs** hinaus gehen, auch hier lassen sich diese durch eine kurze zeitigte Last von einen Hintergrundprozess erklären.
+
+![delay_idle_rt](delay_idle_rt.png)
+
+
+
+## Load
+
+### No Realtime
+
+Bei Load ohne Realtime gibt es zu Begin einen großen Ausreiser mit über **10.000 µs**.
+
+![delay_load](delay_load.png)
+
+### Realtime
+
+Durch die Realtime Priorität können solche Ausreiser vermieden werden, hier liegt der Mean etwas über dem ohne Last (etwa **27,5µs**) und die Ausreiser gehen bis knapp **55µs**.
+
+Dies liegt immer weit unter den Werten ohne Load ohne Realtime Priorität.
+
+![delay_load_rt](delay_load_rt.png)
+

V2/delay/delay_idle.txt

@@ -0,0 +1,100 @@
+  1000000 74885
+  2000000 70188
+  3000000 100960
+  4000000 96993
+  5000000 97920
+  6000000 95671
+  7000000 95193
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+ 93000000 105641
+ 94000000 100006
+ 95000000 96558
+ 96000000 96290
+ 97000000 99299
+ 98000000 97207
+ 99000000 96728
+100000000 99478

V2/delay/delay_idle_rt.txt

@@ -0,0 +1,100 @@
+  1000000 16656
+  2000000 25916
+  3000000 21532
+  4000000 21365
+  5000000 28073
+  6000000 61812
+  7000000 25969
+  8000000 22677
+  9000000 28709
+ 10000000 44480
+ 11000000 47542
+ 12000000 44199
+ 13000000 26011
+ 14000000 50844
+ 15000000 24220
+ 16000000 47490
+ 17000000 30084
+ 18000000 22418
+ 19000000 24543
+ 20000000 130157
+ 21000000 87386
+ 22000000 28783
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+ 24000000 34803
+ 25000000 51356
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+ 40000000 27034
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+ 42000000 48784
+ 43000000 188304
+ 44000000 65535
+ 45000000 72815
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+ 50000000 27557
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+ 58000000 27996
+ 59000000 23610
+ 60000000 28079
+ 61000000 22913
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+ 63000000 28777
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+ 70000000 24904
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+ 80000000 31417
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+ 83000000 26803
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+ 85000000 26437
+ 86000000 29864
+ 87000000 26000
+ 88000000 28438
+ 89000000 28689
+ 90000000 22794
+ 91000000 23148
+ 92000000 22096
+ 93000000 26096
+ 94000000 27233
+ 95000000 25661
+ 96000000 24244
+ 97000000 25797
+ 98000000 22609
+ 99000000 25673
+100000000 26861

V2/delay/delay_load.txt

@@ -0,0 +1,100 @@
+  1000000 10251030
+  2000000 81073
+  3000000 75124
+  4000000 74646
+  5000000 63594
+  6000000 74833
+  7000000 72323
+  8000000 75230
+  9000000 75063
+ 10000000 73386
+ 11000000 78688
+ 12000000 76335
+ 13000000 74814
+ 14000000 76106
+ 15000000 79221
+ 16000000 72074
+ 17000000 77377
+ 18000000 113772
+ 19000000 86679
+ 20000000 81460
+ 21000000 78170
+ 22000000 85867
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+ 30000000 71202
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+ 34000000 95432
+ 35000000 86151
+ 36000000 82703
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+ 40000000 76569
+ 41000000 137860
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+ 45000000 80841
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+ 95000000 79025
+ 96000000 67974
+ 97000000 78225
+ 98000000 78944
+ 99000000 78830
+100000000 67622

V2/delay/delay_load_rt.txt

@@ -0,0 +1,100 @@
+  1000000 22281
+  2000000 15345
+  3000000 14709
+  4000000 13867
+  5000000 14377
+  6000000 28221
+  7000000 37482
+  8000000 12732
+  9000000 21993
+ 10000000 15681
+ 11000000 27859
+ 12000000 23578
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+ 14000000 23871
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+ 22000000 22385
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+ 29000000 18044
+ 30000000 19023
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+ 33000000 23941
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+ 35000000 18869
+ 36000000 18025
+ 37000000 36505
+ 38000000 23891
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+ 41000000 24433
+ 42000000 17966
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+ 93000000 22822
+ 94000000 15521
+ 95000000 45511
+ 96000000 34095
+ 97000000 49033
+ 98000000 53501
+ 99000000 36409
+100000000 37909

V2/delay/render.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -o xtrace
+
+SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
+
+cd "${SCRIPT_DIR}" && gnuplot -c sleep_delay.gp
+
+while IFS= read -r -d '' f; do
+  output=$(echo "$f" | sed -E 's/\.eps$/.png/')
+  convert -density 300 "eps2:${f}" "$output"
+done < <(find "${SCRIPT_DIR}" -name '*.eps' -print0)

V2/delay/sleep_delay.gp

@@ -0,0 +1,20 @@
+set title "{/=20 nanosleep delays}"
+set terminal postscript eps enhanced
+set xlabel "{/=20Period to sleep [nanoseconds]}"
+set ylabel "{/=20Measured delay [nanoseconds]}"
+set grid
+set autoscale
+set style data lines
+show style data
+
+set output 'delay_idle.eps'
+plot 'delay_idle.txt' using ($1):($2) title "{/=17 Load: no, RT: no}" lw 6
+
+set output 'delay_load.eps'
+plot 'delay_load.txt' using ($1):($2) title "{/=17 Load: yes, RT: no}" lw 6
+
+set output 'delay_idle_rt.eps'
+plot 'delay_idle_rt.txt' using ($1):($2) title "{/=17 Load: no, RT: yes}" lw 6
+
+set output 'delay_load_rt.eps'
+plot 'delay_load_rt.txt' using ($1):($2) title "{/=17 Load: yes, RT: yes}" lw 6

V2/sleep/Cargo.lock

@@ -0,0 +1,62 @@
+[root]
+name = "sleep"
+version = "0.1.0"
+dependencies = [
+ "argparse 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "argparse"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_syscall"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "time"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "redox_syscall 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum argparse 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "37bb99f5e39ee8b23b6e227f5b8f024207e8616f44aa4b8c76ecd828011667ef"
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V2/sleep/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "sleep"
+version = "0.1.0"
+authors = ["Simon Wörner <git@simon-woerner.de>"]
+
+[dependencies]
+argparse = ">=0.2.1"
+libc = ">=0.2"
+time = ">=0.1.36"

V2/sleep/src/lib.rs

@@ -0,0 +1,80 @@
+extern crate libc;
+
+use std::time::Duration;
+
+#[cfg(target_os = "linux")]
+fn clock_nanosleep(clk_id: libc::clockid_t,
+                   flags: libc::c_int,
+                   rqtp: *const libc::timespec,
+                   rmtp: *mut libc::timespec)
+                   -> libc::c_int {
+    unsafe { libc::clock_nanosleep(clk_id, flags, rqtp as *const _, rmtp as *mut _) }
+}
+
+#[cfg(target_os = "macos")]
+fn nanosleep(rqtp: *const libc::timespec, rmtp: *mut libc::timespec) -> libc::c_int {
+    unsafe { libc::nanosleep(rqtp as *const _, rmtp as *mut _) }
+}
+
+/// Sleeps for the given duration.
+///
+/// Uses `clock_nanosleep` on linux and `nanosleep` on darwin.
+pub fn sleep(duration: Duration) -> Result<Duration, libc::c_int> {
+    let ts = duration_to_timespec(duration);
+    let mut remain = libc::timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+
+    #[cfg(target_os = "linux")]
+    let ret = clock_nanosleep(libc::CLOCK_MONOTONIC, 0, &ts, &mut remain);
+
+    #[cfg(target_os = "macos")]
+    let ret = nanosleep(&ts, &mut remain);
+
+    if ret == 0 {
+        Ok(timespec_to_duration(remain))
+    } else {
+        Err(ret)
+    }
+}
+
+fn duration_to_timespec(duration: Duration) -> libc::timespec {
+    libc::timespec {
+        tv_sec: duration.as_secs() as libc::time_t,
+        tv_nsec: duration.subsec_nanos() as libc::c_long,
+    }
+}
+
+fn timespec_to_duration(timespec: libc::timespec) -> Duration {
+    Duration::new(timespec.tv_sec as u64, timespec.tv_nsec as u32)
+}
+
+/// Set scheduler policy and priority for process with given pid.
+///
+/// If `pid` equals zero, the policy of the calling process will be set.
+///
+/// # Examples
+///
+/// ```rust
+/// // set *round-robin* policy (default) and priority 99 (realtime) for own process
+/// set_scheduler(0, libc::SCHED_RR, 99);
+/// ```
+#[cfg(target_os = "linux")]
+pub fn set_scheduler(pid: libc::pid_t, policy: libc::c_int, priority: libc::c_int) -> libc::c_int {
+    let param = libc::sched_param { sched_priority: priority };
+    unsafe { libc::sched_setscheduler(pid, policy, &param) }
+}
+
+/// Set scheduler *round-robin* policy (default) and priority for own process.
+///
+/// # Examples
+///
+/// ```rust
+/// // set *round-robin* policy (default) and priority 99 (realtime)
+/// set_priority(99);
+/// ```
+#[cfg(target_os = "linux")]
+pub fn set_priority(priority: i32) -> libc::c_int {
+    set_scheduler(0, libc::SCHED_RR, priority)
+}

V2/sleep/src/main.rs

@@ -0,0 +1,152 @@
+#![feature(step_by)]
+extern crate argparse;
+extern crate sleep;
+extern crate time;
+
+use std::io::prelude::*;
+use std::fs::File;
+use std::path::Path;
+use std::time::Duration;
+
+use argparse::{ArgumentParser, Print, Store};
+use sleep::sleep;
+use time::precise_time_ns;
+
+#[cfg(target_os = "linux")]
+use argparse::StoreTrue;
+
+#[cfg(target_os = "linux")]
+use sleep::set_priority;
+
+fn duration_from_ns(duration_ns: u64) -> Duration {
+    Duration::new(duration_ns / 1_000_000_000,
+                  (duration_ns % 1_000_000_000) as u32)
+}
+fn duration_to_ns(duration: Duration) -> u64 {
+    duration.as_secs() * 1_000_000_000u64 + duration.subsec_nanos() as u64
+}
+
+fn measure_duration(sleep_duration: Duration) -> Duration {
+    let start = precise_time_ns();
+    let _remain = sleep(sleep_duration);
+    let end = precise_time_ns();
+
+    #[cfg(debug_assertions)]
+    println!("remain = {:?}", _remain);
+
+    let duration = end - start;
+    let duration = duration_from_ns(duration);
+
+    #[cfg(debug_assertions)]
+    println!("duration = {:?}", duration);
+
+    duration
+}
+
+fn measure_delay(sleep_duration: Duration) -> (Duration, Duration) {
+    let duration = measure_duration(sleep_duration);
+    let delay = duration - sleep_duration;
+
+    #[cfg(debug_assertions)]
+    println!("delay = {:?}", delay);
+
+    (duration, delay)
+}
+
+fn measure_delay_loop(sleep_duration: Duration, count: u64) -> Vec<(Duration, Duration)> {
+    println!("Starting measurment with period {}s {}ns for {} loops",
+             sleep_duration.as_secs(),
+             sleep_duration.subsec_nanos(),
+             count);
+    let mut data: Vec<(Duration, Duration)> = Vec::with_capacity(count as usize);
+
+    for _ in 0..count {
+        let (duration, delay) = measure_delay(sleep_duration);
+        data.push((duration, delay));
+
+        #[cfg(debug_assertions)]
+        print_delay(duration, delay);
+    }
+
+    data
+}
+
+fn print_delay(duration: Duration, delay: Duration) {
+    println!("value: {} s {} ns\tdelay: {} s {} ns\trelativ delay = {:.2}%\traw_data: {:?}",
+             duration.as_secs(),
+             duration.subsec_nanos(),
+             delay.as_secs(),
+             delay.subsec_nanos(),
+             (duration_to_ns(delay) * 100) as f64 / duration_to_ns(duration) as f64,
+             delay);
+}
+
+fn main() {
+    let mut min: u64 = 1_000_000;
+    let mut max: u64 = 100_000_000;
+    let mut step: u64 = 1_000_000;
+    let mut count: u64 = 100;
+    let mut output: String = "".to_string();
+    let mut file: Option<File> = None;
+
+    #[cfg(target_os = "linux")]
+    let mut realtime: bool = false;
+
+    #[cfg(target_os = "macos")]
+    let realtime: bool = false;
+
+    {
+        let mut ap = ArgumentParser::new();
+        ap.set_description(env!("CARGO_PKG_DESCRIPTION"));
+        ap.refer(&mut min).add_option(&["--min"], Store, "Sleep period start");
+        ap.refer(&mut max).add_option(&["--max"], Store, "Sleep period end");
+        ap.refer(&mut step).add_option(&["--step"], Store, "Sleep period step size");
+        ap.refer(&mut count).add_option(&["--loop"], Store, "Count of measurements per period");
+        #[cfg(target_os = "linux")]
+        ap.refer(&mut realtime).add_option(&["--rt"], StoreTrue, "Set realtime priority");
+        ap.refer(&mut output).add_option(&["-o", "--out"], Store, "Output file");
+        ap.add_option(&["-V", "--version"],
+                      Print(env!("CARGO_PKG_VERSION").to_string()),
+                      "Show version");
+        ap.parse_args_or_exit();
+    }
+
+    if realtime {
+        #[cfg(target_os = "linux")]
+        let ret = set_priority(99);
+
+        #[cfg(target_os = "macos")]
+        let ret = 0;
+
+        if ret != 0 {
+            panic!("Set realtime priority failed.");
+        }
+    }
+
+    if output != "" {
+        file = Some(File::create(Path::new(output.as_str())).expect(format!("Open file '{}' failed",
+                                                                            output)
+                                                                            .as_str()));
+    }
+
+    for duration in (min..max + 1).step_by(step) {
+        let data = measure_delay_loop(duration_from_ns(duration), count);
+        let max_delay = data.iter().max().expect("Max delay not found");
+
+        #[cfg(debug_assertions)]
+        println!("max_delay = {:?}", max_delay);
+
+        print_delay(max_delay.0, max_delay.1);
+
+        match file.as_ref() {
+            Some(mut f) => {
+                let value = format!("{: >9} {}\n", duration, duration_to_ns(max_delay.1));
+                f.write_all(value.as_bytes()).expect(format!("Write value '{}' to '{}' file failed",
+                                                             value,
+                                                             output)
+                                                             .as_str());
+            }
+            None => {}
+        }
+    }
+}

ci/run-cargo-test.sh

@@ -3,10 +3,8 @@
 ERROR=0
 
 while IFS= read -r -d '' f; do
-  dir="$(dirname "${f}")"
-
-  echo "run 'cargo test' in ${dir}"
-  cd "${dir}" && cargo test
+  echo "run 'cargo test' with ${f}"
+  cargo test --manifest-path="${f}"
 
   if [[ $? -ne 0 ]]; then
     ERROR=1