Looks like the difference was hysterical raisins? Also, was it
intentional that CCIO_SEARCH_TIME has been on for all this time?
diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index b30e38f..dcc1e99 100644
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -66,15 +66,8 @@
#undef DEBUG_CCIO_RUN_SG
#ifdef CONFIG_PROC_FS
-/*
- * CCIO_SEARCH_TIME can help measure how fast the bitmap search is.
- * impacts performance though - ditch it if you don't use it.
- */
-#define CCIO_SEARCH_TIME
-#undef CCIO_MAP_STATS
-#else
-#undef CCIO_SEARCH_TIME
-#undef CCIO_MAP_STATS
+/* depends on proc fs support. But costs CPU performance. */
+#undef CCIO_COLLECT_STATS
#endif
#include <linux/proc_fs.h>
@@ -239,12 +232,10 @@ struct ioc {
u32 res_size; /* size of resource map in bytes */
spinlock_t res_lock;
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
#define CCIO_SEARCH_SAMPLE 0x100
unsigned long avg_search[CCIO_SEARCH_SAMPLE];
unsigned long avg_idx; /* current index into avg_search */
-#endif
-#ifdef CCIO_MAP_STATS
unsigned long used_pages;
unsigned long msingle_calls;
unsigned long msingle_pages;
@@ -351,7 +342,7 @@ ccio_alloc_range(struct ioc *ioc, struct device *dev, size_t size)
unsigned int pages_needed = size >> IOVP_SHIFT;
unsigned int res_idx;
unsigned long boundary_size;
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
unsigned long cr_start = mfctl(16);
#endif
@@ -406,7 +397,7 @@ resource_found:
DBG_RES("%s() res_idx %d res_hint: %d\n",
__func__, res_idx, ioc->res_hint);
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
{
unsigned long cr_end = mfctl(16);
unsigned long tmp = cr_end - cr_start;
@@ -416,7 +407,7 @@ resource_found:
ioc->avg_search[ioc->avg_idx++] = cr_start;
ioc->avg_idx &= CCIO_SEARCH_SAMPLE - 1;
#endif
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->used_pages += pages_needed;
#endif
/*
@@ -452,7 +443,7 @@ ccio_free_range(struct ioc *ioc, dma_addr_t iova, unsigned long pages_mapped)
DBG_RES("%s(): res_idx: %d pages_mapped %d\n",
__func__, res_idx, pages_mapped);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->used_pages -= pages_mapped;
#endif
@@ -764,7 +755,7 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
size = ALIGN(size + offset, IOVP_SIZE);
spin_lock_irqsave(&ioc->res_lock, flags);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->msingle_calls++;
ioc->msingle_pages += size >> IOVP_SHIFT;
#endif
@@ -828,7 +819,7 @@ ccio_unmap_single(struct device *dev, dma_addr_t iova, size_t size,
spin_lock_irqsave(&ioc->res_lock, flags);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->usingle_calls++;
ioc->usingle_pages += size >> IOVP_SHIFT;
#endif
@@ -894,7 +885,7 @@ ccio_free_consistent(struct device *dev, size_t size, void *cpu_addr,
*/
#define PIDE_FLAG 0x80000000UL
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
#define IOMMU_MAP_STATS
#endif
#include "iommu-helpers.h"
@@ -938,7 +929,7 @@ ccio_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
spin_lock_irqsave(&ioc->res_lock, flags);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->msg_calls++;
#endif
@@ -997,13 +988,13 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
DBG_RUN_SG("%s() START %d entries, %08lx,%x\n",
__func__, nents, sg_virt_addr(sglist), sglist->length);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->usg_calls++;
#endif
while(sg_dma_len(sglist) && nents--) {
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
ioc->usg_pages += sg_dma_len(sglist) >> PAGE_SHIFT;
#endif
ccio_unmap_single(dev, sg_dma_address(sglist),
@@ -1048,7 +1039,7 @@ static int ccio_proc_info(struct seq_file *m, void *p)
len += seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n",
total_pages * 8, total_pages);
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
len += seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n",
total_pages - ioc->used_pages, ioc->used_pages,
(int)(ioc->used_pages * 100 / total_pages));
@@ -1057,7 +1048,7 @@ static int ccio_proc_info(struct seq_file *m, void *p)
len += seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n",
ioc->res_size, total_pages);
-#ifdef CCIO_SEARCH_TIME
+#ifdef CCIO_COLLECT_STATS
min = max = ioc->avg_search[0];
for(j = 0; j < CCIO_SEARCH_SAMPLE; ++j) {
avg += ioc->avg_search[j];
@@ -1070,7 +1061,7 @@ static int ccio_proc_info(struct seq_file *m, void *p)
len += seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
min, avg, max);
#endif
-#ifdef CCIO_MAP_STATS
+#ifdef CCIO_COLLECT_STATS
len += seq_printf(m, "pci_map_single(): %8ld calls %8ld pages (avg %d/1000)\n",
ioc->msingle_calls, ioc->msingle_pages,
(int)((ioc->msingle_pages * 1000)/ioc->msingle_calls));
@@ -1088,7 +1079,7 @@ static int ccio_proc_info(struct seq_file *m, void *p)
len += seq_printf(m, "pci_unmap_sg() : %8ld calls %8ld pages (avg %d/1000)\n\n\n",
ioc->usg_calls, ioc->usg_pages,
(int)((ioc->usg_pages * 1000)/ioc->usg_calls));
-#endif /* CCIO_MAP_STATS */
+#endif /* CCIO_COLLECT_STATS */
ioc = ioc->next;
}
--
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