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npf_perf_test.c revision 1.7 
      1 /*
      2  * NPF benchmarking.
      3  *
      4  * Public Domain.
      5  */
      6 
      7 #ifdef _KERNEL
      8 #include <sys/types.h>
      9 #include <sys/param.h>
     10 
     11 #include <sys/kernel.h>
     12 #include <sys/kmem.h>
     13 #include <sys/kthread.h>
     14 #endif
     15 
     16 #include "npf_impl.h"
     17 #include "npf_test.h"
     18 
     19 #define	NSECS		10 /* seconds */
     20 
     21 static volatile int	run;
     22 static volatile int	done;
     23 
     24 static uint64_t *	npackets;
     25 static bool		stateful;
     26 
     27 static struct mbuf *
     28 fill_packet(unsigned i)
     29 {
     30 	struct mbuf *m;
     31 	struct ip *ip;
     32 	struct udphdr *uh;
     33 	char buf[32];
     34 
     35 	m = mbuf_construct(IPPROTO_UDP);
     36 	uh = mbuf_return_hdrs(m, false, &ip);
     37 
     38 	snprintf(buf, sizeof(buf), "192.0.2.%u", i + i);
     39 	ip->ip_src.s_addr = inet_addr(PUB_IP1);
     40 	ip->ip_dst.s_addr = inet_addr(stateful ? LOCAL_IP2 : LOCAL_IP3);
     41 	uh->uh_sport = htons(80);
     42 	uh->uh_dport = htons(15000 + i);
     43 	return m;
     44 }
     45 
     46 __dead static void
     47 worker(void *arg)
     48 {
     49 	npf_t *npf = npf_getkernctx();
     50 	ifnet_t *ifp = npf_test_getif(IFNAME_INT);
     51 	unsigned int i = (uintptr_t)arg;
     52 	struct mbuf *m = fill_packet(i);
     53 	uint64_t n = 0;
     54 
     55 	while (!run)
     56 		/* spin-wait */;
     57 	while (!done) {
     58 		int error;
     59 
     60 		error = npf_packet_handler(npf, &m, ifp, PFIL_OUT);
     61 		KASSERT(error == 0); (void)error;
     62 		n++;
     63 	}
     64 	npackets[i] = n;
     65 	kthread_exit(0);
     66 }
     67 
     68 void
     69 npf_test_conc(bool st, unsigned nthreads)
     70 {
     71 	uint64_t total = 0;
     72 	int error;
     73 	lwp_t **l;
     74 
     75 	printf("THREADS\tPKTS\n");
     76 	stateful = st;
     77 	done = false;
     78 	run = false;
     79 
     80 	npackets = kmem_zalloc(sizeof(uint64_t) * nthreads, KM_SLEEP);
     81 	l = kmem_zalloc(sizeof(lwp_t *) * nthreads, KM_SLEEP);
     82 
     83 	for (unsigned i = 0; i < nthreads; i++) {
     84 		error = kthread_create(PRI_NONE, KTHREAD_MUSTJOIN |
     85 		    KTHREAD_MPSAFE, NULL, worker, (void *)(uintptr_t)i,
     86 		    &l[i], "npfperf");
     87 		KASSERT(error == 0); (void)error;
     88 	}
     89 
     90 	/* Let them spin! */
     91 	run = true;
     92 	kpause("perf", false, mstohz(NSECS * 1000), NULL);
     93 	done = true;
     94 
     95 	/* Wait until all threads exit and sum the counts. */
     96 	for (unsigned i = 0; i < nthreads; i++) {
     97 		kthread_join(l[i]);
     98 		total += npackets[i];
     99 	}
    100 	kmem_free(npackets, sizeof(uint64_t) * nthreads);
    101 	kmem_free(l, sizeof(lwp_t *) * nthreads);
    102 
    103 	printf("%u\t%" PRIu64 "\n", nthreads, total / NSECS);
    104 }
    105