85087ae737
Key and value formats for time in state related BPF maps currently
have to be kept in sync between the BPF prog and
libtimeinstate. Add a new bpf_timeinstate.h header file in a directory
that already gets added to the include path for BPF progs, and add
this file to a cc_library_headers module so it can be used from
libtimeinstate as well.
Test: build libtimeinstate and time_in_state.o
Bug: 138317993
Change-Id: Ic56b2b64746f2211f3c802e074339750f26303c0
Merged-In: Ic56b2b64746f2211f3c802e074339750f26303c0
Signed-off-by: Connor O'Brien <connoro@google.com>
(cherry picked from commit badb20f528)
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <inttypes.h>
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#define BPF_FS_PATH "/sys/fs/bpf/"
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// Number of frequencies for which a UID's times can be tracked in a single map entry. If some CPUs
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// have more than 32 freqs available, a single UID is tracked using 2 or more entries.
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#define FREQS_PER_ENTRY 32
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// Number of distinct CPU counts for which a UID's concurrent time stats can be tracked in a single
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// map entry. On systems with more than 8 CPUs, a single UID is tracked using 2 or more entries.
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#define CPUS_PER_ENTRY 8
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typedef struct {
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uint32_t uid;
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uint32_t bucket;
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} time_key_t;
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typedef struct {
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uint64_t ar[FREQS_PER_ENTRY];
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} tis_val_t;
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typedef struct {
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uint64_t active[CPUS_PER_ENTRY];
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uint64_t policy[CPUS_PER_ENTRY];
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} concurrent_val_t;
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typedef struct {
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uint32_t policy;
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uint32_t freq;
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} freq_idx_key_t;
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