17538bdc67
per Intel policy to include file commit date using git cmd below. The policy does not apply to non-Intel (C) notices. git log --follow -C90% --format=%ad --date default <file> | tail -1 and then pull just the year from the result. Intel copyrights were not added to files where Intel either had no contribution ot the contribution lacked substance (ie license header updates, formatting changes, etc) Note that several files in this patch didn't end the license/(c) block with a blank comment line so these were added as the vast majority of files do have this last blank line. Simply there for consistency. Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: I6cd3f18d1b469d5ef249d26ddb2923ca6b970bd4 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15208 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
49 lines
1.4 KiB
Python
Executable File
49 lines
1.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: BSD-3-Clause
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# Copyright (C) 2019 Intel Corporation
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# All rights reserved.
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#
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import sys
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import json
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import base64
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import struct
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buf = sys.stdin.readlines()
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json = json.loads(" ".join(buf))
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histogram = base64.b64decode(json["histogram"])
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bucket_shift = json["bucket_shift"]
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tsc_rate = json["tsc_rate"]
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print("Latency histogram")
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print("==============================================================================")
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print(" Range in us Cumulative IO count")
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so_far = 0
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bucket = 0
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total = 1
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for i in range(0, 64 - bucket_shift):
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for j in range(0, (1 << bucket_shift)):
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index = (((i << bucket_shift) + j) * 8)
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total += int.from_bytes(histogram[index:index + 8], 'little')
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for i in range(0, 64 - bucket_shift):
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for j in range(0, (1 << bucket_shift)):
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index = (((i << bucket_shift) + j)*8)
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count = int.from_bytes(histogram[index:index + 8], 'little')
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so_far += count
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last_bucket = bucket
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if i > 0:
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bucket = (1 << (i + bucket_shift - 1))
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bucket += ((j+1) << (i - 1))
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else:
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bucket = j+1
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start = last_bucket * 1000 * 1000 / tsc_rate
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end = bucket * 1000 * 1000 / tsc_rate
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so_far_pct = so_far * 100.0 / total
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if count > 0:
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print("%9.3f - %9.3f: %9.4f%% (%9u)" % (start, end, so_far_pct, count))
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