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iommu/iommu-debug: Add 3 more signifigant digits

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Print time with ns precision.

Ex:
    size           iommu_map      iommu_unmap
      4K           43.021 us        99.479 us

Change-Id: Ib7f3db2be533c77adf0a20de557615a0e2433dd9
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
This commit is contained in:
Patrick Daly 2015-11-20 20:33:04 -08:00 • committed by David Keitel
parent b07bee3227
commit 75a6af118d
1 changed files with 32 additions and 16 deletions
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48
drivers/iommu/iommu-debug.c
View file

@ -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;
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);
next:
iommu_debug_destroy_phoney_sg_table(dev, &table, chunk_size);