diff --git a/c/poll-timing.c b/c/poll-timing.c
new file mode 100644
index 0000000..7b96909
--- /dev/null
+++ b/c/poll-timing.c
@@ -0,0 +1,119 @@
+#include <stdio.h>
+//#include <sys/time.h>
+#include <time.h>
+#include <stdlib.h>
+
+// For poll-related stuff.
+#include <fcntl.h>
+#include <poll.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define err(msg) do { perror(msg); exit(EXIT_FAILURE); } while (0)
+
+#define BILLION  1000000000L
+#define MILLION  1000000L
+#define THOUSAND 1000L
+
+void get_time_ts(struct timespec *t0) {
+	if (clock_gettime(CLOCK_REALTIME, t0) == -1) {
+		perror("clock_gettime");
+		exit(1);
+	}
+}
+
+long long duration_ns(struct timespec t0, struct timespec t1) {
+	return ((t1.tv_sec - t0.tv_sec)*BILLION) + (t1.tv_nsec - t0.tv_nsec);
+}
+
+void print_time_ns(long long time) {
+	printf("%llds %lldms %lldµ %lldns\n"
+		, time/BILLION
+		, (time/MILLION)%THOUSAND
+		, (time/THOUSAND)%THOUSAND
+		, time%THOUSAND
+	);
+}
+
+int main(int argc, char *argv[])
+{
+	// Time-related structures.
+	struct timespec t0, t1;
+
+	int ready;
+	char buf[10];
+	nfds_t num_open_fds, nfds;
+	ssize_t s;
+	struct pollfd *pfds;
+
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s file...\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	num_open_fds = nfds = argc - 1;
+	pfds = calloc(nfds, sizeof(struct pollfd));
+	if (pfds == NULL)
+		err("malloc");
+
+	/* Open each file on command line, and add it to 'pfds' array. */
+
+	for (nfds_t j = 0; j < nfds; j++) {
+		pfds[j].fd = open(argv[j + 1], O_RDONLY);
+		if (pfds[j].fd == -1)
+			err("open");
+
+		printf("Opened \"%s\" on fd %d\n", argv[j + 1], pfds[j].fd);
+
+		pfds[j].events = POLLIN;
+	}
+
+	/* Keep calling poll() as long as at least one file descriptor is
+	   open. */
+
+	while (num_open_fds > 0) {
+		printf("About to poll()\n");
+
+		get_time_ts(&t0);
+		ready = poll(pfds, nfds, -1);
+		get_time_ts(&t1);
+		if (ready == -1)
+			err("poll");
+
+		printf("polling duration: ");
+		print_time_ns(duration_ns(t0, t1));
+
+		printf("Ready: %d\n", ready);
+
+		/* Deal with array returned by poll(). */
+
+		for (nfds_t j = 0; j < nfds; j++) {
+			if (pfds[j].revents != 0) {
+				printf("  fd=%d; events: %s%s%s\n", pfds[j].fd,
+				       (pfds[j].
+					revents & POLLIN) ? "POLLIN " : "",
+				       (pfds[j].
+					revents & POLLHUP) ? "POLLHUP " : "",
+				       (pfds[j].
+					revents & POLLERR) ? "POLLERR " : "");
+
+				if (pfds[j].revents & POLLIN) {
+					s = read(pfds[j].fd, buf, sizeof(buf));
+					if (s == -1)
+						err("read");
+					printf("    read %zd bytes: %.*s\n",
+					       s, (int)s, buf);
+				} else {	/* POLLERR | POLLHUP */
+					printf("    closing fd %d\n",
+					       pfds[j].fd);
+					if (close(pfds[j].fd) == -1)
+						err("close");
+					num_open_fds--;
+				}
+			}
+		}
+	}
+
+	printf("All file descriptors closed; bye\n");
+	exit(EXIT_SUCCESS);
+}