Author: ian
Date: Tue Jul 29 02:38:02 2014
New Revision: 269217
URL: http://svnweb.freebsd.org/changeset/base/269217
Log:
Export some new busdma stats via sysctl for armv6. Added:
hw.busdma.tags_total: 46
hw.busdma.maps_total: 1302
hw.busdma.maps_dmamem: 851
hw.busdma.maps_coherent: 849
hw.busdma.maploads_total: 1568812
hw.busdma.maploads_bounced: 16750
hw.busdma.maploads_coherent: 920
hw.busdma.maploads_dmamem: 920
hw.busdma.maploads_mbuf: 1542766
hw.busdma.maploads_physmem: 0
Modified:
head/sys/arm/arm/busdma_machdep-v6.c
Modified: head/sys/arm/arm/busdma_machdep-v6.c
==============================================================================
--- head/sys/arm/arm/busdma_machdep-v6.c Tue Jul 29 02:37:48 2014
(r269216)
+++ head/sys/arm/arm/busdma_machdep-v6.c Tue Jul 29 02:38:02 2014
(r269217)
@@ -137,9 +137,40 @@ struct bounce_zone {
static struct mtx bounce_lock;
static int total_bpages;
static int busdma_zonecount;
+static uint32_t tags_total;
+static uint32_t maps_total;
+static uint32_t maps_dmamem;
+static uint32_t maps_coherent;
+static uint64_t maploads_total;
+static uint64_t maploads_bounced;
+static uint64_t maploads_coherent;
+static uint64_t maploads_dmamem;
+static uint64_t maploads_mbuf;
+static uint64_t maploads_physmem;
+
static STAILQ_HEAD(, bounce_zone) bounce_zone_list;
SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters");
+SYSCTL_UINT(_hw_busdma, OID_AUTO, tags_total, CTLFLAG_RD, &tags_total, 0,
+ "Number of active tags");
+SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_total, CTLFLAG_RD, &maps_total, 0,
+ "Number of active maps");
+SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_dmamem, CTLFLAG_RD, &maps_dmamem, 0,
+ "Number of active maps for bus_dmamem_alloc buffers");
+SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_coherent, CTLFLAG_RD, &maps_coherent, 0,
+ "Number of active maps with BUS_DMA_COHERENT flag set");
+SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_total, CTLFLAG_RD,
&maploads_total, 0,
+ "Number of load operations performed");
+SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_bounced, CTLFLAG_RD,
&maploads_bounced, 0,
+ "Number of load operations that used bounce buffers");
+SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_coherent, CTLFLAG_RD,
&maploads_dmamem, 0,
+ "Number of load operations on BUS_DMA_COHERENT memory");
+SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_dmamem, CTLFLAG_RD,
&maploads_dmamem, 0,
+ "Number of load operations on bus_dmamem_alloc buffers");
+SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_mbuf, CTLFLAG_RD, &maploads_mbuf,
0,
+ "Number of load operations for mbufs");
+SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_physmem, CTLFLAG_RD,
&maploads_physmem, 0,
+ "Number of load operations on physical buffers");
SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0,
"Total bounce pages");
@@ -536,6 +567,7 @@ bus_dma_tag_create(bus_dma_tag_t parent,
if (error != 0) {
free(newtag, M_DEVBUF);
} else {
+ atomic_add_32(&tags_total, 1);
*dmat = newtag;
}
CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d",
@@ -565,6 +597,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat)
parent = dmat->parent;
atomic_subtract_int(&dmat->ref_count, 1);
if (dmat->ref_count == 0) {
+ atomic_subtract_32(&tags_total, 1);
free(dmat, M_DEVBUF);
/*
* Last reference count, so
@@ -675,7 +708,10 @@ bus_dmamap_create(bus_dma_tag_t dmat, in
*mapp = NULL;
return (error);
}
- return (error);
+ if (map->flags & DMAMAP_COHERENT)
+ atomic_add_32(&maps_coherent, 1);
+ atomic_add_32(&maps_total, 1);
+ return (0);
}
/*
@@ -692,6 +728,9 @@ bus_dmamap_destroy(bus_dma_tag_t dmat, b
}
if (dmat->bounce_zone)
dmat->bounce_zone->map_count--;
+ if (map->flags & DMAMAP_COHERENT)
+ atomic_subtract_32(&maps_coherent, 1);
+ atomic_subtract_32(&maps_total, 1);
free(map, M_DEVBUF);
dmat->map_count--;
CTR2(KTR_BUSDMA, "%s: tag %p error 0", __func__, dmat);
@@ -780,6 +819,10 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, voi
*mapp = NULL;
return (ENOMEM);
}
+ if (map->flags & DMAMAP_COHERENT)
+ atomic_add_32(&maps_coherent, 1);
+ atomic_add_32(&maps_dmamem, 1);
+ atomic_add_32(&maps_total, 1);
dmat->map_count++;
CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d",
@@ -813,6 +856,10 @@ bus_dmamem_free(bus_dma_tag_t dmat, void
kmem_free(kernel_arena, (vm_offset_t)vaddr, dmat->maxsize);
dmat->map_count--;
+ if (map->flags & DMAMAP_COHERENT)
+ atomic_subtract_32(&maps_coherent, 1);
+ atomic_subtract_32(&maps_total, 1);
+ atomic_subtract_32(&maps_dmamem, 1);
free(map, M_DEVBUF);
CTR3(KTR_BUSDMA, "%s: tag %p flags 0x%x", __func__, dmat, dmat->flags);
}
@@ -990,9 +1037,13 @@ _bus_dmamap_load_phys(bus_dma_tag_t dmat
if (segs == NULL)
segs = map->segments;
+ maploads_total++;
+ maploads_physmem++;
+
if (might_bounce(dmat, map, buflen, buflen)) {
_bus_dmamap_count_phys(dmat, map, buf, buflen, flags);
if (map->pagesneeded != 0) {
+ maploads_bounced++;
error = _bus_dmamap_reserve_pages(dmat, map, flags);
if (error)
return (error);
@@ -1055,17 +1106,26 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dm
struct sync_list *sl;
int error;
+ maploads_total++;
+ if (map->flags & DMAMAP_COHERENT)
+ maploads_coherent++;
+ if (map->flags & DMAMAP_DMAMEM_ALLOC)
+ maploads_dmamem++;
+
if (segs == NULL)
segs = map->segments;
- if (flags & BUS_DMA_LOAD_MBUF)
+ if (flags & BUS_DMA_LOAD_MBUF) {
+ maploads_mbuf++;
map->flags |= DMAMAP_MBUF;
+ }
map->pmap = pmap;
if (might_bounce(dmat, map, (bus_addr_t)buf, buflen)) {
_bus_dmamap_count_pages(dmat, map, buf, buflen, flags);
if (map->pagesneeded != 0) {
+ maploads_bounced++;
error = _bus_dmamap_reserve_pages(dmat, map, flags);
if (error)
return (error);
@@ -1449,7 +1509,7 @@ alloc_bounce_zone(bus_dma_tag_t dmat)
SYSCTL_ADD_INT(busdma_sysctl_tree(bz),
SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO,
"total_bounced", CTLFLAG_RD, &bz->total_bounced, 0,
- "Total bounce requests");
+ "Total bounce requests (pages bounced)");
SYSCTL_ADD_INT(busdma_sysctl_tree(bz),
SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO,
"total_deferred", CTLFLAG_RD, &bz->total_deferred, 0,
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