WIP: Try to get the pthreads idle example running under docker

sample/programs/cpp/Dockerfile

@@ -1,12 +1,11 @@
 FROM ubuntu:bionic
 
 RUN apt-get update
-RUN apt-get install -y build-essential
-RUN apt-get install -y linux-tools-common linux-tools-generic
+RUN apt-get install -y build-essential linux-tools-common linux-tools-4.15.0-30-generic libpthread-stubs0-dev
 RUN ln -sf /usr/lib/linux-tools/4.15.0-30-generic/perf /usr/bin/perf
 
 WORKDIR /workdir
 
 ADD . /workdir
 
-RUN make clean simple-terminates forks
+RUN make clean simple simple-terminates forks idle

sample/programs/cpp/Makefile

@@ -17,9 +17,15 @@ forks: forks.cpp
 random: random.cpp
 	$(CXX) -Wall -g -o $@ $<
 
+idle: idle.c
+	$(CC) -Wall -g -pthread -o $@ $<
+
 linux-perf:
+	docker container prune -f
+	docker image rm speedscope-ubuntu || true
 	docker build -t speedscope-ubuntu .
-	docker run --privileged speedscope-ubuntu /bin/bash perf-script.sh forks > ../../profiles/linux-perf/forks.linux-perf.txt
+	docker run --privileged speedscope-ubuntu /bin/bash perf-script.sh idle > ../../profiles/linux-perf/idle.linux-perf.txt
+	# docker run --privileged speedscope-ubuntu /bin/bash perf-script.sh forks > ../../profiles/linux-perf/forks.linux-perf.txt
 	# docker run --privileged speedscope-ubuntu /bin/bash perf-script.sh with-header > ../../profiles/linux-perf/simple-with-header.linux-perf.txt
 	# docker run --privileged speedscope-ubuntu /bin/bash perf-script.sh with-pid > ../../profiles/linux-perf/simple-with-pid.linux-perf.txt
 	# docker run --privileged speedscope-ubuntu /bin/bash perf-script.sh > ../../profiles/linux-perf/simple.linux-perf.txt

sample/programs/cpp/idle.c

@@ -0,0 +1,78 @@
+// https://github.com/jlfwong/speedscope/issues/393
+#include <stdio.h>
+#include <unistd.h>
+#include <time.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+void fselect() {
+    fd_set rfds;
+    struct timeval tv;
+    int retval;
+
+    FD_ZERO(&rfds);
+    FD_SET(0, &rfds);
+    tv.tv_sec = 2;
+    tv.tv_usec = 0;
+    retval = select(1, &rfds, NULL, NULL, &tv);
+
+    if (retval == -1)
+        perror("select()");
+    else if (retval)
+        printf("Data is available now.\n");
+        /* FD_ISSET(0, &rfds) will be true. */
+    else
+        printf("No data within two seconds.\n");
+}
+
+void timed(int microseconds) {
+    int sec, usec, diff;
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    // printf("begin seconds : %ld micro seconds : %ld\n", tv.tv_sec, tv.tv_usec);
+    sec = tv.tv_sec;
+    usec = tv.tv_usec;
+
+    while (1) {
+        gettimeofday(&tv, NULL);
+        diff = (tv.tv_sec - sec) * 1000000 + tv.tv_usec - usec;
+        if (diff > microseconds) {
+            // printf("end seconds : %ld micro seconds : %ld\n", tv.tv_sec, tv.tv_usec);
+            break;
+        }
+    }
+}
+
+void a() { timed(5000); }
+void b() { timed(5000); }
+void c() { timed(5000); }
+void d() { timed(5000); }
+void e() { timed(5000); }
+
+void func() {
+    for (int i = 0; i < 5; i++) {
+        a();
+        b();
+        fselect();
+        c();
+        d();
+        e();
+        printf("sleep begin\n");
+        sleep(0.1);
+        printf("sleep end\n");
+    }
+}
+
+void *fthread(void *args) {
+    func();
+    return NULL;
+}
+
+int main() {
+    pthread_t thread;
+    pthread_create(&thread, NULL, fthread, NULL);
+
+    func();
+    return 0;
+}

sample/programs/cpp/perf-script.sh

@@ -14,6 +14,14 @@ if [[ "$1" == "forks" ]]; then
   exit 0
 fi
 
+if [[ "$1" == "idle" ]]; then
+  perf record -a -F 999 -g ./idle > perf.data
+  echo "Done recording"
+  ls -alh perf.data
+  perf script -i perf.data
+  exit 0
+fi
+
 perf record -F 999 -g ./simple-terminates > perf.data
 
 if [[ "$1" == "with-header" ]]; then