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-rw-r--r--nptl/sockperf.c594
1 files changed, 594 insertions, 0 deletions
diff --git a/nptl/sockperf.c b/nptl/sockperf.c
new file mode 100644
index 0000000000..d29a6ee26a
--- /dev/null
+++ b/nptl/sockperf.c
@@ -0,0 +1,594 @@
+#define _GNU_SOURCE
+#include <argp.h>
+#include <complex.h>
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <gd.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/poll.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+
+#define size_x 320
+#define size_y 240
+
+
+#define PATH "/tmp/s.sockperf"
+
+
+struct thread_param
+{
+ unsigned int from;
+ unsigned int to;
+ unsigned int nserv;
+};
+
+struct coord
+{
+ unsigned int x;
+ unsigned int y;
+ complex double z;
+};
+
+
+/* We use 64bit values for the times. */
+typedef unsigned long long int hp_timing_t;
+
+
+static unsigned int nclients = 2;
+static unsigned int nservers = 2;
+
+static bool timing;
+static int points;
+
+
+static complex double top_left = -0.7 + 0.2i;
+static complex double bottom_right = -0.5 - 0.0i;
+
+
+static int colors[256];
+static gdImagePtr image;
+static pthread_mutex_t image_lock;
+
+static int sock;
+
+
+static void *
+client (void *arg)
+{
+ struct thread_param *param = arg;
+ unsigned int cnt;
+ unsigned int nserv = param->nserv;
+ int clisock[nserv];
+ struct pollfd servpoll[nserv];
+ struct sockaddr_un servaddr;
+ socklen_t servlen;
+ struct coord c;
+
+ bool new_coord (void)
+ {
+ if (cnt >= param->to)
+ return false;
+
+ unsigned int row = cnt / size_x;
+ unsigned int col = cnt % size_x;
+
+ c.x = col;
+ c.y = row;
+ c.z = (top_left
+ + ((col
+ * (creal (bottom_right) - creal (top_left))) / size_x)
+ + (_Complex_I * (row * (cimag (bottom_right) - cimag (top_left)))
+ / size_y));
+
+ ++cnt;
+
+ return true;
+ }
+
+
+ for (cnt = 0; cnt < nserv; ++cnt)
+ {
+ servpoll[cnt].fd = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (clisock < 0)
+ {
+ puts ("cannot create socket in client");
+ return NULL;
+ }
+
+ memset (&servaddr, '\0', sizeof (servaddr));
+ servaddr.sun_family = AF_UNIX;
+ strncpy (servaddr.sun_path, PATH, sizeof (servaddr.sun_path));
+ servlen = offsetof (struct sockaddr_un, sun_path) + strlen (PATH) + 1;
+
+
+ int err;
+ while (1)
+ {
+ err = TEMP_FAILURE_RETRY (connect (servpoll[cnt].fd, &servaddr,
+ servlen));
+ if (err != -1 || errno != ECONNREFUSED)
+ break;
+
+ pthread_yield ();
+ }
+
+ if (err == -1)
+ {
+ printf ("cannot connect: %m (%d)\n", errno);
+ exit (1);
+ }
+
+ servpoll[cnt].events = POLLOUT;
+ servpoll[cnt].revents = 0;
+ }
+
+ cnt = param->from;
+
+ new_coord ();
+ bool z_valid = true;
+
+ while (1)
+ {
+ int i;
+ int n = poll (servpoll, nserv, -1);
+ if (n == -1)
+ {
+ puts ("poll returned error");
+ break;
+ }
+
+ bool cont = false;
+ for (i = 0; i < nserv && n > 0; ++i)
+ if (servpoll[i].revents != 0)
+ {
+ if (servpoll[i].revents == POLLIN)
+ {
+ unsigned int vals[3];
+ if (TEMP_FAILURE_RETRY (read (servpoll[i].fd, &vals,
+ sizeof (vals)))
+ != sizeof (vals))
+ {
+ puts ("read error in client");
+ return NULL;
+ }
+
+ pthread_mutex_lock (&image_lock);
+
+ gdImageSetPixel (image, vals[0], vals[1], vals[2]);
+ ++points;
+
+ pthread_mutex_unlock (&image_lock);
+
+ servpoll[i].events = POLLOUT;
+ }
+ else
+ {
+ if (servpoll[i].revents != POLLOUT)
+ printf ("revents: %hd != POLLOUT ???\n",
+ servpoll[i].revents);
+
+ if (z_valid)
+ {
+ if (TEMP_FAILURE_RETRY (write (servpoll[i].fd, &c,
+ sizeof (c))) != sizeof (c))
+ {
+ puts ("write error in client");
+ return NULL;
+ }
+ cont = true;
+ servpoll[i].events = POLLIN;
+
+ z_valid = new_coord ();
+ if (! z_valid)
+ /* No more to do. Clear the event fields. */
+ for (i = 0; i < nserv; ++i)
+ if (servpoll[i].events == POLLOUT)
+ servpoll[i].events = servpoll[i].revents = 0;
+ }
+ else
+ servpoll[i].events = servpoll[i].revents = 0;
+ }
+
+ --n;
+ }
+ else if (servpoll[i].events != 0)
+ cont = true;
+
+ if (! cont && ! z_valid)
+ break;
+ }
+
+ c.x = 0xffffffff;
+ c.y = 0xffffffff;
+ for (cnt = 0; cnt < nserv; ++cnt)
+ {
+ TEMP_FAILURE_RETRY (write (servpoll[cnt].fd, &c, sizeof (c)));
+ close (servpoll[cnt].fd);
+ }
+
+ return NULL;
+}
+
+
+static void *
+server (void *arg)
+{
+ struct sockaddr_un cliaddr;
+ socklen_t clilen;
+ int clisock = TEMP_FAILURE_RETRY (accept (sock, &cliaddr, &clilen));
+
+ if (clisock == -1)
+ {
+ puts ("accept failed");
+ return NULL;
+ }
+
+ while (1)
+ {
+ struct coord c;
+
+ if (TEMP_FAILURE_RETRY (read (clisock, &c, sizeof (c))) != sizeof (c))
+ {
+ printf ("server read failed: %m (%d)\n", errno);
+ break;
+ }
+
+ if (c.x == 0xffffffff && c.y == 0xffffffff)
+ break;
+
+ unsigned int rnds = 0;
+ complex double z = c.z;
+ while (cabs (z) < 4.0)
+ {
+ z = z * z - 1;
+ if (++rnds == 255)
+ break;
+ }
+
+ unsigned int vals[3] = { c.x, c.y, rnds };
+ if (TEMP_FAILURE_RETRY (write (clisock, vals, sizeof (vals)))
+ != sizeof (vals))
+ {
+ puts ("server write error");
+ return NULL;
+ }
+ }
+
+ close (clisock);
+
+ return NULL;
+}
+
+
+static const char *outfilename = "test.png";
+
+
+static const struct argp_option options[] =
+ {
+ { "clients", 'c', "NUMBER", 0, "Number of client threads" },
+ { "servers", 's', "NUMBER", 0, "Number of server threads per client" },
+ { "timing", 'T', NULL, 0,
+ "Measure time from startup to the last thread finishing" },
+ { NULL, 0, NULL, 0, NULL }
+ };
+
+/* Prototype for option handler. */
+static error_t parse_opt (int key, char *arg, struct argp_state *state);
+
+/* Data structure to communicate with argp functions. */
+static struct argp argp =
+{
+ options, parse_opt
+};
+
+
+int
+main (int argc, char *argv[])
+{
+ int cnt;
+ FILE *outfile;
+ struct sockaddr_un servaddr;
+ socklen_t servlen;
+ int remaining;
+
+ /* Parse and process arguments. */
+ argp_parse (&argp, argc, argv, 0, &remaining, NULL);
+
+
+ pthread_t servth[nservers * nclients];
+ pthread_t clntth[nclients];
+ struct thread_param clntparam[nclients];
+
+
+ image = gdImageCreate (size_x, size_y);
+ if (image == NULL)
+ {
+ puts ("gdImageCreate failed");
+ return 1;
+ }
+
+ for (cnt = 0; cnt < 255; ++cnt)
+ colors[cnt] = gdImageColorAllocate (image, 256 - cnt, 256 - cnt,
+ 256 - cnt);
+ /* Black. */
+ colors[cnt] = gdImageColorAllocate (image, 0, 0, 0);
+
+
+ sock = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (sock < 0)
+ error (EXIT_FAILURE, errno, "cannot create socket");
+
+ memset (&servaddr, '\0', sizeof (servaddr));
+ servaddr.sun_family = AF_UNIX;
+ strncpy (servaddr.sun_path, PATH, sizeof (servaddr.sun_path));
+ servlen = offsetof (struct sockaddr_un, sun_path) + strlen (PATH) + 1;
+
+ if (bind (sock, &servaddr, servlen) == -1)
+ error (EXIT_FAILURE, errno, "bind failed");
+
+ listen (sock, SOMAXCONN);
+
+ pthread_mutex_init (&image_lock, NULL);
+
+
+ struct sigaction sa;
+ sa.sa_handler = SIG_IGN;
+ sigemptyset (&sa.sa_mask);
+ sa.sa_flags = 0;
+
+ clockid_t cl;
+ struct timespec start_time;
+ if (timing)
+ {
+ if (clock_getcpuclockid (0, &cl) != 0
+ || clock_gettime (cl, &start_time) != 0)
+ timing = false;
+ }
+
+ /* Start the servers. */
+ for (cnt = 0; cnt < nservers * nclients; ++cnt)
+ {
+ if (pthread_create (&servth[cnt], NULL, server, NULL) != 0)
+ {
+ puts ("pthread_create for server failed");
+ exit (1);
+ }
+ }
+
+ for (cnt = 0; cnt < nclients; ++cnt)
+ {
+ clntparam[cnt].from = cnt * (size_x * size_y) / nclients;
+ clntparam[cnt].to = MIN ((cnt + 1) * (size_x * size_y) / nclients,
+ size_x * size_y);
+ clntparam[cnt].nserv = nservers;
+
+ if (pthread_create (&clntth[cnt], NULL, client, &clntparam[cnt]) != 0)
+ {
+ puts ("pthread_create for client failed");
+ exit (1);
+ }
+ }
+
+
+ /* Wait for the clients. */
+ for (cnt = 0; cnt < nclients; ++cnt)
+ if (pthread_join (clntth[cnt], NULL) != 0)
+ {
+ puts ("client pthread_join failed");
+ exit (1);
+ }
+
+ /* Wait for the servers. */
+ for (cnt = 0; cnt < nclients * nservers; ++cnt)
+ if (pthread_join (servth[cnt], NULL) != 0)
+ {
+ puts ("server pthread_join failed");
+ exit (1);
+ }
+
+
+ if (timing)
+ {
+ struct timespec end_time;
+
+ if (clock_gettime (cl, &end_time) == 0)
+ {
+ end_time.tv_sec -= start_time.tv_sec;
+ end_time.tv_nsec -= start_time.tv_nsec;
+ if (end_time.tv_nsec < 0)
+ {
+ end_time.tv_nsec += 1000000000;
+ --end_time.tv_sec;
+ }
+
+ printf ("\nRuntime: %lu.%09lu seconds\n%d points computed\n",
+ (unsigned long int) end_time.tv_sec,
+ (unsigned long int) end_time.tv_nsec,
+ points);
+ }
+ }
+
+
+ outfile = fopen (outfilename, "w");
+ if (outfile == NULL)
+ error (EXIT_FAILURE, errno, "cannot open output file '%s'", outfilename);
+
+ gdImagePng (image, outfile);
+
+ fclose (outfile);
+
+ unlink (PATH);
+
+ return 0;
+}
+
+
+/* Handle program arguments. */
+static error_t
+parse_opt (int key, char *arg, struct argp_state *state)
+{
+ switch (key)
+ {
+ case 'c':
+ nclients = strtoul (arg, NULL, 0);
+ break;
+
+ case 's':
+ nservers = strtoul (arg, NULL, 0);
+ break;
+
+ case 'T':
+ timing = true;
+ break;
+
+ default:
+ return ARGP_ERR_UNKNOWN;
+ }
+
+ return 0;
+}
+
+
+static hp_timing_t
+get_clockfreq (void)
+{
+ /* We read the information from the /proc filesystem. It contains at
+ least one line like
+ cpu MHz : 497.840237
+ or also
+ cpu MHz : 497.841
+ We search for this line and convert the number in an integer. */
+ static hp_timing_t result;
+ int fd;
+
+ /* If this function was called before, we know the result. */
+ if (result != 0)
+ return result;
+
+ fd = open ("/proc/cpuinfo", O_RDONLY);
+ if (__builtin_expect (fd != -1, 1))
+ {
+ /* XXX AFAIK the /proc filesystem can generate "files" only up
+ to a size of 4096 bytes. */
+ char buf[4096];
+ ssize_t n;
+
+ n = read (fd, buf, sizeof buf);
+ if (__builtin_expect (n, 1) > 0)
+ {
+ char *mhz = memmem (buf, n, "cpu MHz", 7);
+
+ if (__builtin_expect (mhz != NULL, 1))
+ {
+ char *endp = buf + n;
+ int seen_decpoint = 0;
+ int ndigits = 0;
+
+ /* Search for the beginning of the string. */
+ while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n')
+ ++mhz;
+
+ while (mhz < endp && *mhz != '\n')
+ {
+ if (*mhz >= '0' && *mhz <= '9')
+ {
+ result *= 10;
+ result += *mhz - '0';
+ if (seen_decpoint)
+ ++ndigits;
+ }
+ else if (*mhz == '.')
+ seen_decpoint = 1;
+
+ ++mhz;
+ }
+
+ /* Compensate for missing digits at the end. */
+ while (ndigits++ < 6)
+ result *= 10;
+ }
+ }
+
+ close (fd);
+ }
+
+ return result;
+}
+
+
+int
+clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
+{
+ /* We don't allow any process ID but our own. */
+ if (pid != 0 && pid != getpid ())
+ return EPERM;
+
+#ifdef CLOCK_PROCESS_CPUTIME_ID
+ /* Store the number. */
+ *clock_id = CLOCK_PROCESS_CPUTIME_ID;
+
+ return 0;
+#else
+ /* We don't have a timer for that. */
+ return ENOENT;
+#endif
+}
+
+
+#define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rdtsc" : "=A" (Var))
+
+/* Get current value of CLOCK and store it in TP. */
+int
+clock_gettime (clockid_t clock_id, struct timespec *tp)
+{
+ int retval = -1;
+
+ switch (clock_id)
+ {
+ case CLOCK_PROCESS_CPUTIME_ID:
+ {
+
+ static hp_timing_t freq;
+ hp_timing_t tsc;
+
+ /* Get the current counter. */
+ HP_TIMING_NOW (tsc);
+
+ if (freq == 0)
+ {
+ freq = get_clockfreq ();
+ if (freq == 0)
+ return EINVAL;
+ }
+
+ /* Compute the seconds. */
+ tp->tv_sec = tsc / freq;
+
+ /* And the nanoseconds. This computation should be stable until
+ we get machines with about 16GHz frequency. */
+ tp->tv_nsec = ((tsc % freq) * UINT64_C (1000000000)) / freq;
+
+ retval = 0;
+ }
+ break;
+
+ default:
+ errno = EINVAL;
+ break;
+ }
+
+ return retval;
+}
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