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add context switching speed test to "test memory" command.

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This commit is contained in:
gardners 2013-10-22 13:12:10 -07:00
parent 6ff2ae4871
commit 31b314d2da
4 changed files with 152 additions and 1 deletions
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6
commandline.c
View File

@ -2484,12 +2484,17 @@ int app_reverse_lookup(const struct cli_parsed *parsed, struct cli_context *cont
return 1;
}
int context_switch_test(int);
int app_mem_test(const struct cli_parsed *parsed, struct cli_context *context)
{
int mem_size;
int addr;
uint64_t count;
// First test context switch speed
context_switch_test(1);
for(mem_size=1024;mem_size<=(128*1024*1024);mem_size*=2) {
uint8_t *mem=malloc(mem_size);
if (!mem) {
@ -2525,6 +2530,7 @@ int app_mem_test(const struct cli_parsed *parsed, struct cli_context *context)
free(mem);
}
return 0;
}

103
context1.c Normal file
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@ -0,0 +1,103 @@
/*******************************************************************************
* The BYTE UNIX Benchmarks - Release 3
* Module: context1.c SID: 3.3 5/15/91 19:30:18
*
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Ben Smith, Rick Grehan or Tom Yager
* ben@bytepb.byte.com rick_g@bytepb.byte.com tyager@bytepb.byte.com
*
*******************************************************************************
* Modification Log:
* $Header: context1.c,v 3.4 87/06/22 14:22:59 kjmcdonell Beta $
* August 28, 1990 - changed timing routines--now returns total number of
* iterations in specified time period
* October 22, 1997 - code cleanup to remove ANSI C compiler warnings
* Andy Kahn <kahn@zk3.dec.com>
*
******************************************************************************/
char SCCSid[] = "@(#) @(#)context1.c:3.3 -- 5/15/91 19:30:18";
/*
* Context switching via synchronized unbuffered pipe i/o
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "timeit.c"
unsigned long iter;
int stop_timing=0;
void report()
{
fprintf(stderr, "%lu context switches per second.\n", iter);
stop_timing=1;
}
int context_switch_test(int duration)
{
unsigned long check;
int p1[2], p2[2];
/* set up alarm call */
iter = 0;
wake_me(duration, report);
if (pipe(p1) || pipe(p2)) {
perror("pipe create failed");
exit(1);
}
if (fork()) { /* parent process */
/* master, write p1 & read p2 */
close(p1[0]); close(p2[1]);
while (!stop_timing) {
if (write(p1[1], (char *)&iter, sizeof(iter)) != sizeof(iter)) {
if ((errno != 0) && (errno != EINTR))
perror("master write failed");
exit(1);
}
if (read(p2[0], (char *)&check, sizeof(check)) != sizeof(check)) {
if ((errno != 0) && (errno != EINTR))
perror("master read failed");
exit(1);
}
if (check != iter) {
fprintf(stderr, "Master sync error: expect %lu, got %lu\n",
iter, check);
exit(2);
}
iter++;
}
}
else { /* child process */
unsigned long iter1;
iter1 = 0;
/* slave, read p1 & write p2 */
close(p1[1]); close(p2[0]);
while (!stop_timing) {
if (read(p1[0], (char *)&check, sizeof(check)) != sizeof(check)) {
if ((errno != 0) && (errno != EINTR))
perror("slave read failed");
exit(1);
}
if (check != iter1) {
fprintf(stderr, "Slave sync error: expect %lu, got %lu\n",
iter, check);
exit(2);
}
if (write(p2[1], (char *)&iter1, sizeof(iter1)) != sizeof(check)) {
if ((errno != 0) && (errno != EINTR))
perror("slave write failed");
exit(1);
}
iter1++;
}
}
}

3
sourcefiles.mk
View File

@ -74,4 +74,5 @@ SERVAL_SOURCES = \
$(SERVAL_BASE)fec-3.0.1/ccsds_tables.c \
$(SERVAL_BASE)fec-3.0.1/decode_rs_8.c \
$(SERVAL_BASE)fec-3.0.1/encode_rs_8.c \
$(SERVAL_BASE)fec-3.0.1/init_rs_char.c
$(SERVAL_BASE)fec-3.0.1/init_rs_char.c \
$(SERVAL_BASE)context1.c

41
timeit.c Normal file
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@ -0,0 +1,41 @@
/*******************************************************************************
*
* The BYTE UNIX Benchmarks - Release 3
* Module: timeit.c SID: 3.3 5/15/91 19:30:21
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Ben Smith, Rick Grehan or Tom Yager
* ben@bytepb.byte.com rick_g@bytepb.byte.com tyager@bytepb.byte.com
*
*******************************************************************************
* Modification Log:
* May 12, 1989 - modified empty loops to avoid nullifying by optimizing
* compilers
* August 28, 1990 - changed timing relationship--now returns total number
* of iterations (ty)
* October 22, 1997 - code cleanup to remove ANSI C compiler warnings
* Andy Kahn <kahn@zk3.dec.com>
*
******************************************************************************/
/* this module is #included in other modules--no separate SCCS ID */
/*
* Timing routine
*
*/
#include <signal.h>
#include <unistd.h>
void wake_me(seconds, func)
int seconds;
void (*func)();
{
/* set up the signal handler */
signal(SIGALRM, func);
/* get the clock running */
alarm(seconds);
}