附录A
中断延迟测试代码：
这是一个补丁(patch)文件，在我的Linux-2.2.12版本下编译通过。通过下面的命令粘贴到Linux源文件中：
# cd /usr/src/linux-2.2.12
# patch –p1 < /usr/src/linux-2.2.12/interrupt-latency-2.2.12-patch
粘贴完成后编译Linux内核：
# cd /usr/src/linux-2.2.12
# make config # 配置内核
# make dep
# make bzImage # 编译内核
# make modules # 编译模块
# make modules_install # 装载模块
# cp arch/i386/boot/bzImage /boot/interrupt-lattency
配置LILO，编辑/etc/lilo.conf，把下面几行添加进：
image=/boot/interrupt-latency
label=interrupt-lattency
read-only
root=/dev/hda1
重新装LILO：
# /sbin/lilo
重启后在LILO提示符下输入：
LILO: interrupt-latency
则可以监控系统调用开/关中断的内核就起动完成，还需要运行一个用户空间程序(view.c, 见下面)用于输入命令和打印测试结果。
interrupt-latency-2.2.12-patch文件如下：
diff --exclude=version.h --exclude=config.h -Nru linux-2.2.12/arch/i386/kernel/Makefile linux-2.2.12-interrupt/arch/i386/kernel/Makefile
--- linux-2.2.12/arch/i386/kernel/Makefile Wed Jan 20 10:18:53 1999
+++ linux-2.2.12-interrupt/arch/i386/kernel/Makefile Mon Mar 6 11:04:25 2000
@@ -14,7 +14,9 @@
O_TARGET := kernel.o
O_OBJS := process.o signal.o entry.o traps.o irq.o vm86.o \
- ptrace.o ioport.o ldt.o setup.o time.o sys_i386.o
+ ptrace.o ioport.o ldt.o setup.o time.o sys_i386.o \
+ intr_blocking.o
+
OX_OBJS := i386_ksyms.o
MX_OBJS :=
diff --exclude=version.h --exclude=config.h -Nru linux-2.2.12/arch/i386/kernel/entry.S linux-2.2.12-interrupt/arch/i386/kernel/entry.S
--- linux-2.2.12/arch/i386/kernel/entry.S Fri Apr 30 08:13:37 1999
+++ linux-2.2.12-interrupt/arch/i386/kernel/entry.S Mon Mar 6 11:05:10 2000
@@ -96,6 +96,7 @@
movl %dx,%es;
#define RESTORE_ALL \
+ incl intrData; \
popl %ebx; \
popl %ecx; \
popl %edx; \
@@ -562,6 +563,8 @@
.long SYMBOL_NAME(sys_ni_syscall) /* streams1 */
.long SYMBOL_NAME(sys_ni_syscall) /* streams2 */
.long SYMBOL_NAME(sys_vfork) /* 190 */
+
+ .long SYMBOL_NAME(sys_get_intrData) /* 191 */
/*
* NOTE!! This doesn't have to be exact - we just have
diff --exclude=version.h --exclude=config.h -Nru linux-2.2.12/arch/i386/kernel/head.S linux-2.2.12-interrupt/arch/i386/kernel/head.S
--- linux-2.2.12/arch/i386/kernel/head.S Thu Jan 14 22:57:25 1999
+++ linux-2.2.12-interrupt/arch/i386/kernel/head.S Mon Mar 6 11:14:26 2000
@@ -316,6 +316,7 @@
movl %ax,%es
pushl $int_msg
call SYMBOL_NAME(printk)
+ incl intrData
popl %eax
popl %ds
popl %es
diff --exclude=version.h --exclude=config.h -Nru linux-2.2.12/arch/i386/kernel/intr_blocking.c linux-2.2.12-interrupt/arch/i386/kernel/intr_blocking.c
--- linux-2.2.12/arch/i386/kernel/intr_blocking.c Wed Dec 31 16:00:00 1969
+++ linux-2.2.12-interrupt/arch/i386/kernel/intr_blocking.c Mon Mar 6 11:41:50 2000
@@ -0,0 +1,322 @@
+#include <asm/system.h>
+
+
+/**** platform ****/
+#define readclock(low) \
+ __asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
+
+/**** configure ****/
+#define NUM_LOG_ENTRY 4
+#define INTR_IENABLE 0x200
+
+/**** data structure ****/
+struct IntrData {
+ /* count interrupt and iret */
+ int breakCount;
+
+ /* the test name */
+ const char * testName;
+
+ /* flag to control logging */
+ unsigned logFlag; /* 0 - no logging; 1 - logging */
+
+ /* panic flag - set to 1 if something is realy wrong */
+ unsigned panicFlag;
+
+ /* for synchro between start and end */
+ unsigned syncFlag;
+
+ /* we only log interrupts within certain range */
+ unsigned rangeLow;
+ unsigned rangeHigh;
+
+ /* count the total number interrupts and intrs in range*/
+ unsigned numIntrs;
+ unsigned numInRangeIntrs;
+
+
+ /* error accounting */
+ unsigned skipSti;
+ unsigned skipCli;
+ unsigned syncStiError;
+ unsigned syncCliError;
+ unsigned stiBreakError;
+ unsigned restoreSti;
+ unsigned restoreCli;
+
+ struct {
+ /* worst blocking time */
+ unsigned blockingTime;
+
+ const char * startFileName;
+ unsigned startFileLine;
+ unsigned startCount;
+
+ const char *endFileName;
+ unsigned endFileLine;
+ unsigned endCount;
+ } count[NUM_LOG_ENTRY];
+};
+
+struct IntrData intrData = {
+ 0,
+ "interrupt latency test (4 distinctive entries)",
+ 0,
+ 0,
+ 0,
+
+ 1,
+ 0xffffffff,
+
+ 0,
+ 0,
+
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0
+};
+
+
+/**** functions ****/
+#if 0
+void intr_check_int(int x)
+{
+
+ unsigned flag;
+ __intr_save_flags(flag);
+
+ if ((flag & INTR_IENABLE) != 0) {
+ switch(x) {
+ case 0 :
+ intrData.count[0].blockingTime ++;
+ break;
+ case 1 :
+ intrData.count[0].startFileLine ++;
+ break;
+ case 2 :
+ intrData.count[0].startCount ++;
+ break;
+ case 3 :
+ intrData.count[0].endFileLine ++;
+ break;
+ case 4 :
+ intrData.count[0].endCount ++;
+ break;
+ default :
+ intrData.count[0].startFileName = "Wrong check number";
+ break;
+ }
+ } else {
+ switch(x) {
+ case 0 :
+ intrData.count[1].blockingTime ++;
+ break;
+ case 1 :
+ intrData.count[1].startFileLine ++;
+ break;
+ case 2 :
+ intrData.count[1].startCount ++;
+ break;
+ case 3 :
+ intrData.count[1].endFileLine ++;
+ break;
+ case 4 :
+ intrData.count[1].endCount ++;
+ break;
+ default :
+ intrData.count[1].startFileName = "Wrong check number";
+ break;
+ }
+ }
+}
+
+#endif
+
+
+static inline void intr_SetPanic(unsigned x, const char *fname, unsigned l)
+{
+ if (intrData.panicFlag != 0) {
+ /* double error; impossible */
+ intrData.panicFlag = 99;
+ return;
+ }
+ intrData.panicFlag = x;
+ intrData.count[0].startFileName = fname;
+ intrData.count[0].startFileLine = l;
+}
+
+static const char *intrStartFileName;
+static unsigned intrStartFileLine;
+static unsigned intrStartCount;
+
+/* strategy :
+ * if it is true "cli", i.e., clearing the IF, we remember
+ * everything, and clear breakCount.
+ */
+void intr_cli(const char *fname, unsigned lineno)
+{
+ unsigned flag;
+ __intr_save_flags(flag);
+
+ __intr_cli();
+
+ /* if we are not logging or we have an error, do nothing */
+ if ((intrData.logFlag == 0) || ( intrData.panicFlag != 0)) {
+ return;
+ }
+
+ /* do nothing we had IF cleared before we call this function */
+ if ((flag & INTR_IENABLE) == 0) {
+ intrData.skipCli ++;
+ return;
+ }
+
+ /* debug */
+ if (intrData.syncFlag == 1) {
+ intrData.syncCliError ++;
+ }
+ intrData.syncFlag = 1;
+
+ intrData.breakCount = 0;
+
+ /* Read the Time Stamp Counter */
+ intrStartFileName = fname;
+ intrStartFileLine = lineno;
+ readclock(intrStartCount);
+}
+
+
+/* strategy:
+ * we do a count only if
+ * 1. syncFlag is 1 (a valid cli() was called)
+ * 2. breakCount is 0 (no iret is called between cli() and this sti()
+ */
+void intr_sti(const char *fname, unsigned lineno)
+{
+ unsigned flag;
+ unsigned endCount;
+ unsigned diff;
+ int i;
+
+ __intr_save_flags(flag);
+
+ /* if we are not logging or we have an error, do nothing */
+ if ((intrData.logFlag == 0) || ( intrData.panicFlag != 0)) {
+ __intr_sti();
+ return;
+ }
+
+
+ /* check if this is a real sti() */
+ if ((flag & INTR_IENABLE) != 0) {
+ intrData.skipSti ++;
+ __intr_sti();
+ return;
+ }
+
+ /* check 1*/
+ if (intrData.syncFlag != 1) {
+ intrData.syncStiError ++;
+ __intr_sti();
+ return;
+ }
+
+ /* check 2 */
+ if (intrData.breakCount != 0) {
+ intrData.stiBreakError ++;
+ __intr_sti();
+ return;
+ }
+
+ /* read count again */
+ readclock(endCount);
+
+ intrData.syncFlag = 0;
+
+ diff = endCount - intrStartCount;
+
+ if ((diff >= intrData.rangeLow) && (diff <= intrData.rangeHigh)) {
+ unsigned lowest=0xffffffff;
+ unsigned lowestIndex;
+ unsigned sameIndex = 0xffffffff;
+
+ intrData.numInRangeIntrs++;
+
+ /* check if we need to log this event */
+ for (i=0; i< NUM_LOG_ENTRY; i++) {
+
+ if (lowest > intrData.count[i].blockingTime) {
+ lowest = intrData.count[i].blockingTime;
+ lowestIndex = i;
+ }
+
+ if ( (lineno == intrData.count[i].endFileLine) &&
+ (intrStartFileLine == intrData.count[i].startFileLine) &&
+ (fname[0] == intrData.count[i].endFileName[0]) &&
+ (intrStartFileName[0] == intrData.count[i].startFileName[0]) ) {
+ /* if the line numbers are same, the first chars in
+ * both file names are same, we consider it is the same
+ * entry. */
+ sameIndex = i;
+ }
+ }
+
+ if (sameIndex == 0xffffffff) {
+ i = lowestIndex;
+ } else {
+ i = sameIndex;
+ }
+
+ if (diff > intrData.count[i].blockingTime) {
+ intrData.count[i].blockingTime = diff;
+ intrData.count[i].endFileName = fname;
+ intrData.count[i].endFileLine = lineno;
+ intrData.count[i].endCount = endCount;
+ intrData.count[i].startFileName = intrStartFileName;
+ intrData.count[i].startFileLine = intrStartFileLine;
+ intrData.count[i].startCount = intrStartCount;
+ }
+ }
+
+ intrData.numIntrs++;
+ __intr_sti();
+}
+
+
+void intr_restore_flags(const char *fname, unsigned lineno, unsigned x)
+{
+ unsigned flag;
+
+ /* if we are not logging or we have an error, do nothing */
+ if ((intrData.logFlag == 0) || ( intrData.panicFlag != 0)) {
+ __intr_restore_flags(x);
+ return;
+ }
+
+ __intr_save_flags(flag);
+
+ if (((flag & INTR_IENABLE) == 0) &&
+ ((x & INTR_IENABLE) != 0) ) {
+ intrData.restoreSti ++;
+ intr_sti(fname, lineno);
+ }
+
+ if ( ((flag & INTR_IENABLE) != 0) &&
+ ((x & INTR_IENABLE) == 0) ) {
+ intrData.restoreCli ++;
+ intr_cli(fname, lineno);
+ }
+
+ __intr_restore_flags(x);
+}
+
+#include <asm/uaccess.h>
+
+asmlinkage int sys_get_intrData(void ** ptr)
+{
+ return put_user(&intrData, ptr);
+}
diff --exclude=version.h --exclude=config.h -Nru linux-2.2.12/include/asm-i386/system.h linux-2.2.12-interrupt/include/asm-i386/system.h
--- linux-2.2.12/include/asm-i386/system.h Mon Oct 11 21:28:12 1999
+++ linux-2.2.12-interrupt/include/asm-i386/system.h Mon Mar 6 11:08:02 2000
@@ -174,13 +174,33 @@
#define wmb() __asm__ __volatile__ ("": : :"memory")
/* interrupt control.. */
+#if 0
#define __sti() __asm__ __volatile__ ("sti": : :"memory")
#define __cli() __asm__ __volatile__ ("cli": : :"memory")
#define __save_flags(x) \
__asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */ :"memory")
#define __restore_flags(x) \
__asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory")
+#endif
+#define __intr_sti() __asm__ __volatile__ ("sti": : :"memory")
+#define __intr_cli() __asm__ __volatile__ ("cli": : :"memory")
+#define __intr_save_flags(x) \
+__asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */ :"memory")
+#define __intr_restore_flags(x) \
+__asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory")
+
+/* jsun */
+extern void intr_cli(const char *, unsigned);
+extern void intr_sti(const char *, unsigned);
+extern void intr_restore_flags(const char *, unsigned, unsigned);
+extern void intr_sync_flag(const char *, unsigned lineno);
+
+#define __cli() intr_cli(__FILE__, __LINE__)
+#define __sti() intr_sti(__FILE__, __LINE__)
+#define __save_flags(x) \
+__asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */ :"memory")
+#define __restore_flags(x) intr_restore_flags(__FILE__, __LINE__, x)
#ifdef __SMP__
@@ -197,9 +217,8 @@
#define cli() __cli()
#define sti() __sti()
-#define save_flags(x) __save_flags(x)
+#define save_flags(x) __save_flags(x)
#define restore_flags(x) __restore_flags(x)
-
#endif
/*
用户空间程序view.c如下：
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <assert.h>
/****************** CONFIG ****************/
#define NUM_LOG_ENTRY 4
#define CLOCK_FREQUENCY 266 /* cycles per microsecond */
#define SYSCALL_NUMBER 191
/****************** END OF CONFIG ***************/
#define CMD_EXIT 0
#define CMD_DISPLAY 1
#define CMD_START 2
#define CMD_STOP 3
#define CMD_CONTINUE 4
#define CMD_SET_RANGE 5
#define CMD_LAST 6
struct IntrData {
/* count interrupt and iret */
int breakCount;
/* the test name */
const char * testName;
/* flag to control logging */
unsigned logFlag; /* 0 - no logging; 1 - logging */
/* panic flag - set to 1 if something is realy wrong */
unsigned panicFlag;
/* for synchro between start and end */
unsigned syncFlag;
/* we only log interrupts within certain range */
unsigned rangeLow;
unsigned rangeHigh;
/* count the total number interrupts and intrs in range*/
unsigned numIntrs;
unsigned numInRangeIntrs;
/* error accounting */
unsigned skipSti;
unsigned skipCli;
unsigned syncStiError;
unsigned syncCliError;
unsigned stiBreakError;
unsigned restoreSti;
unsigned restoreCli;
struct {
/* worst blocking time */
unsigned blockingTime;
const char * startFileName;
unsigned startFileLine;
unsigned startCount;
const char *endFileName;
unsigned endFileLine;
unsigned endCount;
} count[NUM_LOG_ENTRY];
};
unsigned pData;
struct IntrData data;
int kmem;
char buf[81];
unsigned int GetInt(const char *prompt)
{
unsigned int i;
printf("%s", prompt);
scanf("%d", &i);
return i;
}
unsigned int GetHex(const char *prompt)
{
unsigned int i;
printf("%s", prompt);
scanf("%x", &i);
return i;
}
unsigned GetCommand()
{
for(;;) {
unsigned cmd;
printf("\n");
printf("Command Menu \n");
printf("=============\n");
printf("0-Exit 1-Display 2-Start logging 3-Stop logging 4-Continue\n");
printf("5-Set range\n");
printf("\n");
printf("Your choice : ");
scanf("%u", &cmd);
if ((cmd >= 0) && (cmd < CMD_LAST)) {
return cmd;
} else {
printf("Invalid choice!!!!\n\n");
}
}
}
unsigned GetKmemInt(unsigned offset)
{
off_t seekError;
ssize_t size;
unsigned num=0;
assert((offset & 3) == 0);
seekError = lseek(kmem, offset, SEEK_SET);
assert(seekError != (off_t)-1);
size = read(kmem, &num, sizeof(num));
assert(sizeof(num) == 4);
assert(size == 4);
return num;
}
char * GetKmemString(unsigned offset)
{
off_t seekError;
ssize_t size;
buf[80]=0;
buf[0]=0;
if (offset == 0) return buf;
seekError = lseek(kmem, offset, SEEK_SET);
assert(seekError != (off_t)-1);
size = read(kmem, buf, 80);
assert(size == 80);
return buf;
}
void GetKmemBlock(unsigned offset, void * buf, unsigned bufSize)
{
off_t seekError;
ssize_t size;
seekError = lseek(kmem, offset, SEEK_SET);
assert(seekError != (off_t)-1);
size = read(kmem, buf, bufSize);
assert(size == bufSize);
}
void SetKmemBlock(unsigned offset, void *buf, unsigned bufSize)
{
off_t seekError;
ssize_t size;
seekError = lseek(kmem, offset, SEEK_SET);
assert(seekError != (off_t)-1);
size = write(kmem, buf, bufSize);
assert(size == bufSize);
}
void SetKmemInt(unsigned offset, unsigned x)
{
off_t seekError;
ssize_t size;
seekError = lseek(kmem, offset, SEEK_SET);
assert(seekError != (off_t)-1);
size = write(kmem, &x, sizeof(x));
assert(size == sizeof(x));
}
void Display()
{
unsigned i;
GetKmemBlock(pData, &data, sizeof(data));
printf("%s : \n", GetKmemString((unsigned)data.testName));
printf("breakCount : %d\n", data.breakCount);
printf("logFlag : %d\n", data.logFlag);
printf("panicFlag : %d\n", data.panicFlag);
printf("syncFlag : %d\n", data.syncFlag);
printf("range : [%u(0x%x) : %u(0x%x)]\n",
data.rangeLow, data.rangeLow,
data.rangeHigh, data.rangeHigh);
printf("numIntrs : %u\n", data.numIntrs);
printf("numInRangeInts: %u\n", data.numInRangeIntrs);
printf("skipSti skipCli syncSti syncCli stiBreak restSti restCli\n");
printf("%d\t%d\t%d\t%d\t%d\t%d\t%d\t\n",
data.skipSti,
data.skipCli,
data.syncStiError,
data.syncCliError,
data.stiBreakError,
data.restoreSti,
data.restoreCli);
for (i=0; i< NUM_LOG_ENTRY; i++) {
printf("log entry : %d\n", i);
printf("\tblockingTime : %u (%u us)\n",
data.count[i].blockingTime,
data.count[i].blockingTime / CLOCK_FREQUENCY);
printf("\tstartFileName : %s\n",
GetKmemString((unsigned)data.count[i].startFileName));
printf("\tstartFileLine : %u\n", data.count[i].startFileLine);
printf("\tstartCount : %u\n", data.count[i].startCount);
printf("\tendFileName : %s\n",
GetKmemString((unsigned)data.count[i].endFileName));
printf("\tendFileLine : %u\n", data.count[i].endFileLine);
printf("\tendCount : %u\n", data.count[i].endCount);
}
printf("\n");
}
void StartLogging()
{
unsigned i;
/* init first */
data.breakCount = 0;
data.logFlag = 0;
data.panicFlag = 0;
data.syncFlag = 0;
data.numIntrs = 0;
data.numInRangeIntrs = 0;
data.skipSti =
data.skipCli =
data.syncStiError =
data.syncCliError =
data.stiBreakError =
data.restoreSti =
data.restoreCli = 0;
for (i=0; i< NUM_LOG_ENTRY; i++) {
data.count[i].blockingTime = 0;
data.count[i].startFileName = 0;
data.count[i].startFileLine = 0;
data.count[i].startCount = 0;
data.count[i].endFileName = 0;
data.count[i].endFileLine = 0;
data.count[i].endCount = 0;
}
SetKmemBlock(pData, &data, sizeof(data));
/* turn the logging flag */
SetKmemInt(pData + ((unsigned)&data.logFlag - (unsigned)&data), 1);
}
void EndLogging()
{
/* turn the logging flag */
SetKmemInt(pData + ((unsigned)&data.logFlag - (unsigned)&data), 0);
}
void ContinueLoggin()
{
/* turn the logging flag */
SetKmemInt(pData + ((unsigned)&data.logFlag - (unsigned)&data), 1);
}
void SetRange()
{
data.rangeLow = GetInt("Input lower bound (decimal) : ");
printf("\tlower bound is %u(0x%x)\n", data.rangeLow, data.rangeLow);
data.rangeHigh = GetInt("Input upper bound (decimal) : ");
printf("\tupper bound is %u(0x%x)\n", data.rangeHigh, data.rangeHigh);
SetKmemInt(pData + ((unsigned)&data.rangeLow - (unsigned)&data),
data.rangeLow);
SetKmemInt(pData + ((unsigned)&data.rangeHigh - (unsigned)&data),
data.rangeHigh);
}
main()
{
unsigned int cmd;
unsigned long offset;
kmem = open("/dev/kmem", O_RDWR);
assert(kmem > 0);
if (syscall(SYSCALL_NUMBER, &pData) != 0) {
printf("failed to get jsunData address through syscall 191!\n");
pData = GetHex("Input mannually the address of jsunData : ");
}
GetKmemBlock(pData, &data, sizeof(data));
for(;;) {
cmd = GetCommand();
switch (cmd) {
case CMD_DISPLAY:
Display();
break;
case CMD_START:
StartLogging();
break;
case CMD_STOP:
EndLogging();
break;
case CMD_CONTINUE:
ContinueLoggin();
break;
case CMD_SET_RANGE:
SetRange();
break;
case CMD_EXIT:
close(kmem);
return;
default:
assert(0 == 1);
}
}
}
附录B
上下文切换测试程序lat_ctx.c：
/*
* lat_ctx.c - context switch timer
*
* usage: lat_ctx [-s size] #procs [#procs....]
*
* Copyright (c) 1994 Larry McVoy. Distributed under the FSF GPL with
* additional restriction that results may published only if
* (1) the benchmark is unmodified, and
* (2) the version in the sccsid below is included in the report.
* Support for this development by Sun Microsystems is gratefully acknowledged.
*/
char *id = "$Id$\n";
#include "bench.h"
#if defined(sgi) && defined(PIN)
#include <sys/sysmp.h>
#include <sys/syssgi.h>
int ncpus;
#endif
#define MAXPROC 2048
#define CHUNK (4<<10)
#define TRIPS 5
#ifndef max
#define max(a, b) ((a) > (b) ? (a) : (b))
#endif
int process_size, *data; /* size & pointer to an array that big */
int pids[MAXPROC];
int p[MAXPROC][2];
double pipe_cost(int p[][2], int procs);
int ctx(int procs, int nprocs);
int sumit(int);
void killem(int procs);
void doit(int p[MAXPROC][2], int rd, int wr);
int create_pipes(int p[][2], int procs);
int create_daemons(int p[][2], int pids[], int procs);
int
main(int ac, char **av)
{
int i, max_procs;
double overhead = 0;
if (ac < 2) {
usage: printf("Usage: %s [-s kbytes] processes [processes ...]\n",
av[0]);
exit(1);
}
/*
* Need 4 byte ints.
*/
if (sizeof(int) != 4) {
fprintf(stderr, "Fix sumit() in ctx.c.\n");
exit(1);
}
/*
* If they specified a context size, get it.
*/
if (!strcmp(av[1], "-s")) {
if (ac < 4) {
goto usage;
}
process_size = atoi(av[2]) * 1024;
if (process_size > 0) {
data = (int *)calloc(1, max(process_size, CHUNK));
BENCHO(sumit(CHUNK), sumit(0), 0);
overhead = gettime();
overhead /= get_n();
overhead *= process_size;
overhead /= CHUNK;
}
ac -= 2;
av += 2;
}
#if defined(sgi) && defined(PIN)
ncpus = sysmp(MP_NPROCS);
sysmp(MP_MUSTRUN, 0);
#endif
for (max_procs = atoi(av[1]), i = 1; i < ac; ++i) {
int procs = atoi(av[i]);
if (max_procs < procs) max_procs = procs;
}
max_procs = create_pipes(p, max_procs);
overhead += pipe_cost(p, max_procs);
max_procs = create_daemons(p, pids, max_procs);
fprintf(stderr, "\n\"size=%dk ovr=%.2f\n", process_size/1024, overhead);
for (i = 1; i < ac; ++i) {
double time;
int procs = atoi(av[i]);
if (procs > max_procs) continue;
BENCH(ctx(procs, max_procs), 0);
time = usecs_spent();
time /= get_n();
time /= procs;
time /= TRIPS;
time -= overhead;
fprintf(stderr, "%d %.2f\n", procs, time);
}
/*
* Close the pipes and kill the children.
*/
killem(max_procs);
for (i = 0; i < max_procs; ++i) {
close(p[i][0]);
close(p[i][1]);
if (i > 0) {
wait(0);
}
}
return (0);
}
int
ctx(int procs, int nprocs)
{
int msg;
int i;
int sum;
/*
* Main process - all others should be ready to roll, time the
* loop.
*/
for (i = 0; i < TRIPS; ++i) {
if (write(p[nprocs - procs][1], &msg, sizeof(msg)) !=
sizeof(msg)) {
perror("read/write on pipe");
exit(1);
}
if (read(p[nprocs-1][0], &msg, sizeof(msg)) != sizeof(msg)) {
perror("read/write on pipe");
exit(1);
}
sum = sumit(process_size);
}
return (sum);
}
void
killem(int procs)
{
int i;
for (i = 1; i < procs; ++i) {
if (pids[i] > 0) {
kill(pids[i], SIGTERM);
}
}
}
void
doit(int p[][2], int rd, int wr)
{
int msg, sum = 0 /* lint */;
signal(SIGTERM, SIG_DFL);
if (data) bzero((void*)data, process_size);
for ( ;; ) {
if (read(p[rd][0], &msg, sizeof(msg)) != sizeof(msg)) {
perror("read/write on pipe");
break;
}
sum = sumit(process_size);
if (write(p[wr][1], &msg, sizeof(msg)) != sizeof(msg)) {
perror("read/write on pipe");
break;
}
}
use_int(sum);
exit(1);
}
int
doit_cost(int p[][2], int procs)
{
static int k;
int msg = 1;
int i;
for (i = 0; i < TRIPS; ++i) {
if (write(p[k][1], &msg, sizeof(msg)) != sizeof(msg)) {
perror("read/write on pipe");
exit(1);
}
if (read(p[k][0], &msg, sizeof(msg)) != sizeof(msg)) {
perror("read/write on pipe");
exit(1);
}
if (++k == procs) {
k = 0;
}
}
return (msg);
}
/*
* The cost returned is the cost of going through one pipe once in usecs.
* No memory costs are included here, this is different than lmbench1.
*/
double
pipe_cost(int p[][2], int procs)
{
double result;
/*
* Measure the overhead of passing a byte around the ring.
*/
BENCH(doit_cost(p, procs), 0);
result = usecs_spent();
result /= get_n();
result /= TRIPS;
return result;
}
int
create_daemons(int p[][2], int pids[], int procs)
{
int i;
int msg;
/*
* Use the pipes as a ring, and fork off a bunch of processes
* to pass the byte through their part of the ring.
*
* Do the sum in each process and get that time before moving on.
*/
signal(SIGTERM, SIG_IGN);
for (i = 1; i < procs; ++i) {
switch (pids[i] = fork()) {
case -1: /* could not fork, out of processes? */
procs = i;
break;
case 0: /* child */
#if defined(sgi) && defined(PIN)
sysmp(MP_MUSTRUN, i % ncpus);
#endif
doit(p, i-1, i);
/* NOTREACHED */
default: /* parent */
;
}
}
/*
* Go once around the loop to make sure that everyone is ready and
* to get the token in the pipeline.
*/
if (write(p[0][1], &msg, sizeof(msg)) != sizeof(msg) ||
read(p[procs-1][0], &msg, sizeof(msg)) != sizeof(msg)) {
perror("write/read/write on pipe");
exit(1);
}
if (data) bzero((void*)data, process_size);
return procs;
}
int
create_pipes(int p[][2], int procs)
{
int i;
/*
* Get a bunch of pipes.
*/
morefds();
for (i = 0; i < procs; ++i) {
if (pipe(p[i]) == -1) {
return i;
}
}
return procs;
}
/*
* Bring howmuch data into the cache, assuming that the smallest cache
* line is 16 bytes.
*/
int
sumit(int howmuch)
{
int done, sum = 0;
register int *d = data;
#if 0
#define A sum+=d[0]+d[4]+d[8]+d[12]+d[16]+d[20]+d[24]+d[28]+\
d[32]+d[36]+d[40]+d[44]+d[48]+d[52]+d[56]+d[60]+\
d[64]+d[68]+d[72]+d[76]+d[80]+d[84]+d[88]+d[92]+\
d[96]+d[100]+d[104]+d[108]+d[112]+d[116]+d[120]+d[124];\
d+=128;
#define TWOKB A A A A
#else
#define A sum+=d[0]+d[1]+d[2]+d[3]+d[4]+d[5]+d[6]+d[7]+d[8]+d[9]+\
d[10]+d[11]+d[12]+d[13]+d[14]+d[15]+d[16]+d[17]+d[18]+d[19]+\
d[20]+d[21]+d[22]+d[23]+d[24]+d[25]+d[26]+d[27]+d[28]+d[29]+\
d[30]+d[31]+d[32]+d[33]+d[34]+d[35]+d[36]+d[37]+d[38]+d[39]+\
d[40]+d[41]+d[42]+d[43]+d[44]+d[45]+d[46]+d[47]+d[48]+d[49]+\
d[50]+d[51]+d[52]+d[53]+d[54]+d[55]+d[56]+d[57]+d[58]+d[59]+\
d[60]+d[61]+d[62]+d[63]+d[64]+d[65]+d[66]+d[67]+d[68]+d[69]+\
d[70]+d[71]+d[72]+d[73]+d[74]+d[75]+d[76]+d[77]+d[78]+d[79]+\
d[80]+d[81]+d[82]+d[83]+d[84]+d[85]+d[86]+d[87]+d[88]+d[89]+\
d[90]+d[91]+d[92]+d[93]+d[94]+d[95]+d[96]+d[97]+d[98]+d[99]+\
d[100]+d[101]+d[102]+d[103]+d[104]+\
d[105]+d[106]+d[107]+d[108]+d[109]+\
d[110]+d[111]+d[112]+d[113]+d[114]+\
d[115]+d[116]+d[117]+d[118]+d[119]+\
d[120]+d[121]+d[122]+d[123]+d[124]+d[125]+d[126]+d[127];\
d+=128; /* ints; bytes == 512 */
#define TWOKB A A A A
#endif
for (done = 0; done < howmuch; done += 2048) {
TWOKB
}
return (sum);
}
/* bench.h */
#ifndef _BENCH_H
#define _BENCH_H
#ifdef WIN32
#include <windows.h>
typedef unsigned char bool_t;
#endif
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#ifndef WIN32
#include <unistd.h>
#endif
#include <stdlib.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#ifndef WIN32
#include <strings.h>
#endif
#include <sys/types.h>
#ifndef WIN32
#include <sys/mman.h>
#endif
#include <sys/stat.h>
#ifndef WIN32
#include <sys/wait.h>
#include <time.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/resource.h>
#define PORTMAP
#include <rpc/rpc.h>
#endif
#ifndef HAVE_uint
typedef unsigned int uint;
#endif
#ifdef HAVE_uint64_t
typedef uint64_t uint64;
#else
typedef unsigned long long uint64;
#endif
#define NO_PORTMAPPER /* needs to be up here, lib_*.h look at it */
#include "stats.h"
#include "timing.h"
#include "lib_tcp.h"
#include "lib_udp.h"
#include "lib_unix.h"
#ifdef DEBUG
# define debug(x) fprintf x
#else
# define debug(x)
#endif
#ifdef NO_PORTMAPPER
#define TCP_SELECT -31233
#define TCP_XACT -31234
#define TCP_CONTROL -31235
#define TCP_DATA -31236
#define TCP_CONNECT -31237
#define UDP_XACT -31238
#define UDP_DATA -31239
#else
#define TCP_SELECT (u_long)404038 /* XXX - unregistered */
#define TCP_XACT (u_long)404039 /* XXX - unregistered */
#define TCP_CONTROL (u_long)404040 /* XXX - unregistered */
#define TCP_DATA (u_long)404041 /* XXX - unregistered */
#define TCP_CONNECT (u_long)404042 /* XXX - unregistered */
#define UDP_XACT (u_long)404032 /* XXX - unregistered */
#define UDP_DATA (u_long)404033 /* XXX - unregistered */
#define VERS (u_long)1
#endif
#define UNIX_CONTROL "/tmp/lmbench.ctl"
#define UNIX_DATA "/tmp/lmbench.data"
#define UNIX_LAT "/tmp/lmbench.lat"
/*
* socket send/recv buffer optimizations
*/
#define SOCKOPT_READ 0x0001
#define SOCKOPT_WRITE 0x0002
#define SOCKOPT_RDWR 0x0003
#define SOCKOPT_PID 0x0004
#define SOCKOPT_REUSE 0x0008
#define SOCKOPT_NONE 0
#ifndef SOCKBUF
#define SOCKBUF (1024*1024)
#endif
#ifndef XFERSIZE
#define XFERSIZE (64*1024) /* all bandwidth I/O should use this */
#endif
#if defined(SYS5) || defined(WIN32)
#define bzero(b, len) memset(b, 0, len)
#define bcopy(s, d, l) memcpy(d, s, l)
#define rindex(s, c) strrchr(s, c)
#endif
#define gettime usecs_spent
#define streq !strcmp
#define ulong unsigned long
#ifdef USE_RAND
#define srand48 srand
#define drand48() ((double)rand() / (double)RAND_MAX)
#endif
#ifdef USE_RANDOM
#define srand48 srand
#define drand48() ((double)rand() / (double)RAND_MAX)
#endif
#ifdef WIN32
#include <process.h>
#define getpid _getpid
int gettimeofday(struct timeval *tv, struct timezone *tz);
#endif
#define SMALLEST_LINE 32 /* smallest cache line size */
#define TIME_OPEN2CLOSE
#define GO_AWAY signal(SIGALRM, exit); alarm(60 * 60);
#define REAL_SHORT 50000
#define SHORT 1000000
#define MEDIUM 2000000
#define LONGER 7500000 /* for networking data transfers */
#define ENOUGH REAL_SHORT
#define TRIES 11
typedef struct {
int N;
uint64 u[TRIES];
uint64 n[TRIES];
} result_t;
void insertinit(result_t *r);
void insertsort(uint64, uint64, result_t *);
void save_median();
void save_minimum();
void save_results(result_t *r);
void get_results(result_t *r);
#define BENCHO(loop_body, overhead_body, enough) { \
int __i, __N; \
double __oh; \
result_t __overhead, __r; \
insertinit(&__overhead); insertinit(&__r); \
__N = (enough == 0 || get_enough(enough) <= 100000) ? TRIES : 1;\
if (enough < LONGER) {loop_body;} /* warm the cache */ \
for (__i = 0; __i < __N; ++__i) { \
BENCH1(overhead_body, enough); \
if (gettime() > 0) \
insertsort(gettime(), get_n(), &__overhead); \
BENCH1(loop_body, enough); \
if (gettime() > 0) \
insertsort(gettime(), get_n(), &__r); \
} \
for (__i = 0; __i < __r.N; ++__i) { \
__oh = __overhead.u[__i] / (double)__overhead.n[__i]; \
__r.u[__i] -= (uint64)((double)__r.n[__i] * __oh); \
} \
save_results(&__r); \
}
#define BENCH(loop_body, enough) { \
long __i, __N; \
result_t __r; \
insertinit(&__r); \
__N = (enough == 0 || get_enough(enough) <= 100000) ? TRIES : 1;\
if (enough < LONGER) {loop_body;} /* warm the cache */ \
for (__i = 0; __i < __N; ++__i) { \
BENCH1(loop_body, enough); \
if (gettime() > 0) \
insertsort(gettime(), get_n(), &__r); \
} \
save_results(&__r); \
}
#define BENCH1(loop_body, enough) { \
double __usecs; \
BENCH_INNER(loop_body, enough); \
__usecs = gettime(); \
__usecs -= t_overhead() + get_n() * l_overhead(); \
settime(__usecs >= 0. ? (uint64)__usecs : 0.); \
}
#define BENCH_INNER(loop_body, enough) { \
static u_long __iterations = 1; \
int __enough = get_enough(enough); \
u_long __n; \
double __result = 0.; \
\
while(__result < 0.95 * __enough) { \
start(0); \
for (__n = __iterations; __n > 0; __n--) { \
loop_body; \
} \
__result = stop(0,0); \
if (__result < 0.99 * __enough \
|| __result > 1.2 * __enough) { \
if (__result > 150.) { \
double tmp = __iterations / __result; \
tmp *= 1.1 * __enough; \
__iterations = (u_long)(tmp + 1); \
} else { \
if (__iterations > (u_long)1<<27) { \
__result = 0.; \
break; \
} \
__iterations <<= 3; \
} \
} \
} /* while */ \
save_n((uint64)__iterations); settime((uint64)__result); \
}
/*
* Generated from msg.x which is included here:
program XACT_PROG {
version XACT_VERS {
char
RPC_XACT(char) = 1;
} = 1;
} = 3970;
* Please do not edit this file.
* It was generated using rpcgen.
*/
#include <rpc/types.h>
#define XACT_PROG ((u_long)404040)
#define XACT_VERS ((u_long)1)
#define RPC_XACT ((u_long)1)
#define RPC_EXIT ((u_long)2)
extern char *rpc_xact_1();
extern char *client_rpc_xact_1();
#endif /* _BENCH_H */
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