AcoSail/kernel_optimize_test
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[PKTGEN]: Ports thread list to Kernel list implementation.

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The final result is a simpler and smaller code.

Note that I'm adding a new member in the struct pktgen_thread called
'removed'. The reason is that I didn't find a better wait condition to
be used in the place of the replaced one.

Signed-off-by: Luiz Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Luiz Capitulino 2006-03-20 22:16:40 -08:00 committed by David S. Miller
parent 222f180658
commit cdcdbe0b17
1 changed files with 41 additions and 55 deletions
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96
net/core/pktgen.c
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@ -125,6 +125,7 @@
#include <linux/capability.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
@ -330,7 +331,8 @@ struct pktgen_hdr {
struct pktgen_thread {
spinlock_t if_lock;
struct pktgen_dev *if_list; /* All device here */
struct pktgen_thread *next;
struct list_head th_list;
int removed;
char name[32];
char result[512];
u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
@ -492,7 +494,7 @@ static int pg_clone_skb_d;
static int debug;
static DECLARE_MUTEX(pktgen_sem);
static struct pktgen_thread *pktgen_threads = NULL;
static LIST_HEAD(pktgen_threads);
static struct notifier_block pktgen_notifier_block = {
.notifier_call = pktgen_device_event,
@ -1522,9 +1524,7 @@ static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
struct pktgen_thread *t;
struct pktgen_dev *pkt_dev = NULL;
t = pktgen_threads;
while (t) {
list_for_each_entry(t, &pktgen_threads, th_list) {
pkt_dev = pktgen_find_dev(t, ifname);
if (pkt_dev) {
if (remove) {
@ -1535,7 +1535,6 @@ static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
}
break;
}
t = t->next;
}
return pkt_dev;
}
@ -2455,15 +2454,15 @@ static void pktgen_run(struct pktgen_thread *t)
static void pktgen_stop_all_threads_ifs(void)
{
struct pktgen_thread *t = pktgen_threads;
struct pktgen_thread *t;
PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads_ifs.\n"));
thread_lock();
while (t) {
list_for_each_entry(t, &pktgen_threads, th_list)
t->control |= T_STOP;
t = t->next;
}
thread_unlock();
}
@ -2503,40 +2502,36 @@ static int pktgen_wait_thread_run(struct pktgen_thread *t)
static int pktgen_wait_all_threads_run(void)
{
struct pktgen_thread *t = pktgen_threads;
struct pktgen_thread *t;
int sig = 1;
while (t) {
thread_lock();
list_for_each_entry(t, &pktgen_threads, th_list) {
sig = pktgen_wait_thread_run(t);
if (sig == 0)
break;
thread_lock();
t = t->next;
thread_unlock();
}
if (sig == 0) {
thread_lock();
while (t) {
if (sig == 0)
list_for_each_entry(t, &pktgen_threads, th_list)
t->control |= (T_STOP);
t = t->next;
}
thread_unlock();
}
thread_unlock();
return sig;
}
static void pktgen_run_all_threads(void)
{
struct pktgen_thread *t = pktgen_threads;
struct pktgen_thread *t;
PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
thread_lock();
while (t) {
list_for_each_entry(t, &pktgen_threads, th_list)
t->control |= (T_RUN);
t = t->next;
}
thread_unlock();
schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
@ -2693,24 +2688,12 @@ static void pktgen_rem_thread(struct pktgen_thread *t)
{
/* Remove from the thread list */
struct pktgen_thread *tmp = pktgen_threads;
remove_proc_entry(t->name, pg_proc_dir);
thread_lock();
if (tmp == t)
pktgen_threads = tmp->next;
else {
while (tmp) {
if (tmp->next == t) {
tmp->next = t->next;
t->next = NULL;
break;
}
tmp = tmp->next;
}
}
list_del(&t->th_list);
thread_unlock();
}
@ -2969,6 +2952,8 @@ static void pktgen_thread_worker(struct pktgen_thread *t)
PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
pktgen_rem_thread(t);
t->removed = 1;
}
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
@ -3081,19 +3066,18 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
static struct pktgen_thread *__init pktgen_find_thread(const char *name)
{
struct pktgen_thread *t = NULL;
struct pktgen_thread *t;
thread_lock();
t = pktgen_threads;
while (t) {
if (strcmp(t->name, name) == 0)
break;
list_for_each_entry(t, &pktgen_threads, th_list)
if (strcmp(t->name, name) == 0) {
thread_unlock();
return t;
}
t = t->next;
}
thread_unlock();
return t;
return NULL;
}
static int __init pktgen_create_thread(const char *name, int cpu)
@ -3132,8 +3116,9 @@ static int __init pktgen_create_thread(const char *name, int cpu)
pe->proc_fops = &pktgen_thread_fops;
pe->data = t;
t->next = pktgen_threads;
pktgen_threads = t;
list_add_tail(&t->th_list, &pktgen_threads);
t->removed = 0;
if (kernel_thread((void *)pktgen_thread_worker, (void *)t,
CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0)
@ -3234,17 +3219,18 @@ static int __init pg_init(void)
static void __exit pg_cleanup(void)
{
struct pktgen_thread *t;
struct list_head *q, *n;
wait_queue_head_t queue;
init_waitqueue_head(&queue);
/* Stop all interfaces & threads */
while (pktgen_threads) {
struct pktgen_thread *t = pktgen_threads;
pktgen_threads->control |= (T_TERMINATE);
list_for_each_safe(q, n, &pktgen_threads) {
t = list_entry(q, struct pktgen_thread, th_list);
t->control |= (T_TERMINATE);
wait_event_interruptible_timeout(queue, (t != pktgen_threads),
HZ);
wait_event_interruptible_timeout(queue, (t->removed == 1), HZ);
}
/* Un-register us from receiving netdevice events */