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Commit 7c012402 authored by Patrick Daly's avatar Patrick Daly
Browse files

iommu/iommu-debug: Add 3 more signifigant digits 



Print time with ns precision.

Ex:
    size           iommu_map      iommu_unmap
      4K           43.021 us        99.479 us

Change-Id: Ib7f3db2be533c77adf0a20de557615a0e2433dd9
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent d8293ace

drivers/iommu/iommu-debug.c

+32 −16
Original line number Diff line number Diff line
@@ -497,11 +497,13 @@ static void iommu_debug_device_profiling(struct seq_file *s, struct device *dev, 
	}



	seq_printf(s, "(average over %d iterations)\n", iters_per_op);

	seq_printf(s, "%8s %15s %12s\n", "size", "iommu_map", "iommu_unmap");

	seq_printf(s, "%8s %19s %16s\n", "size", "iommu_map", "iommu_unmap");

	for (sz = sizes; *sz; ++sz) {

		unsigned long size = *sz;

		size_t unmapped;

		u64 map_elapsed_ns = 0, unmap_elapsed_ns = 0;

		u64 map_elapsed_us = 0, unmap_elapsed_us = 0;

		u32 map_elapsed_rem = 0, unmap_elapsed_rem = 0;

		struct timespec tbefore, tafter, diff;

		int i;
@@ -514,7 +516,7 @@ static void iommu_debug_device_profiling(struct seq_file *s, struct device *dev, 
			}

			getnstimeofday(&tafter);

			diff = timespec_sub(tafter, tbefore);

			map_elapsed_us += div_s64(timespec_to_ns(&diff), 1000);

			map_elapsed_ns += timespec_to_ns(&diff);



			getnstimeofday(&tbefore);

			unmapped = iommu_unmap(domain, iova, size);
@@ -526,23 +528,31 @@ static void iommu_debug_device_profiling(struct seq_file *s, struct device *dev, 
			}

			getnstimeofday(&tafter);

			diff = timespec_sub(tafter, tbefore);

			unmap_elapsed_us += div_s64(timespec_to_ns(&diff),

						    1000);

			unmap_elapsed_ns += timespec_to_ns(&diff);

		}



		map_elapsed_us /= iters_per_op;

		unmap_elapsed_us /= iters_per_op;

		map_elapsed_ns /= iters_per_op;

		unmap_elapsed_ns /= iters_per_op;



		seq_printf(s, "%8s %12lld us %9lld us\n", _size_to_string(size),

			map_elapsed_us, unmap_elapsed_us);

		map_elapsed_us = div_u64_rem(map_elapsed_ns, 1000,

						&map_elapsed_rem);

		unmap_elapsed_us = div_u64_rem(unmap_elapsed_ns, 1000,

						&unmap_elapsed_rem);



		seq_printf(s, "%8s %12lld.%03d us %9lld.%03d us\n",

			_size_to_string(size),

			map_elapsed_us, map_elapsed_rem,

			unmap_elapsed_us, unmap_elapsed_rem);

	}



	seq_putc(s, '\n');

	seq_printf(s, "%8s %15s %12s\n", "size", "iommu_map_sg", "iommu_unmap");

	seq_printf(s, "%8s %19s %16s\n", "size", "iommu_map_sg", "iommu_unmap");

	for (sz = sizes; *sz; ++sz) {

		unsigned long size = *sz;

		size_t unmapped;

		u64 map_elapsed_ns = 0, unmap_elapsed_ns = 0;

		u64 map_elapsed_us = 0, unmap_elapsed_us = 0;

		u32 map_elapsed_rem = 0, unmap_elapsed_rem = 0;

		struct timespec tbefore, tafter, diff;

		struct sg_table table;

		unsigned long chunk_size = SZ_4K;
@@ -564,7 +574,7 @@ static void iommu_debug_device_profiling(struct seq_file *s, struct device *dev, 
			}

			getnstimeofday(&tafter);

			diff = timespec_sub(tafter, tbefore);

			map_elapsed_us += div_s64(timespec_to_ns(&diff), 1000);

			map_elapsed_ns += timespec_to_ns(&diff);



			getnstimeofday(&tbefore);

			unmapped = iommu_unmap(domain, iova, size);
@@ -576,15 +586,21 @@ static void iommu_debug_device_profiling(struct seq_file *s, struct device *dev, 
			}

			getnstimeofday(&tafter);

			diff = timespec_sub(tafter, tbefore);

			unmap_elapsed_us += div_s64(timespec_to_ns(&diff),

						    1000);

			unmap_elapsed_ns += timespec_to_ns(&diff);

		}



		map_elapsed_us /= iters_per_op;

		unmap_elapsed_us /= iters_per_op;

		map_elapsed_ns /= iters_per_op;

		unmap_elapsed_ns /= iters_per_op;



		map_elapsed_us = div_u64_rem(map_elapsed_ns, 1000,

						&map_elapsed_rem);

		unmap_elapsed_us = div_u64_rem(unmap_elapsed_ns, 1000,

						&unmap_elapsed_rem);



		seq_printf(s, "%8s %12lld us %9lld us\n", _size_to_string(size),

			map_elapsed_us, unmap_elapsed_us);

		seq_printf(s, "%8s %12lld.%03d us %9lld.%03d us\n",

			_size_to_string(size),

			map_elapsed_us, map_elapsed_rem,

			unmap_elapsed_us, unmap_elapsed_rem);



next:

		iommu_debug_destroy_phoney_sg_table(dev, &table, chunk_size);