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f07952b179
Add basic flow for a new iostat mode in perf. Mode is intended to provide four I/O performance metrics per each PCIe root port: Inbound Read, Inbound Write, Outbound Read, Outbound Write. The actual code to compute the metrics and attribute it to root port is in follow-on patches. Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey V Bayduraev <alexey.v.bayduraev@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20210419094147.15909-2-alexander.antonov@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include "util/iostat.h"
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#include "util/debug.h"
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enum iostat_mode_t iostat_mode = IOSTAT_NONE;
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__weak int iostat_prepare(struct evlist *evlist __maybe_unused,
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struct perf_stat_config *config __maybe_unused)
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{
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return -1;
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}
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__weak int iostat_parse(const struct option *opt __maybe_unused,
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const char *str __maybe_unused,
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int unset __maybe_unused)
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{
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pr_err("iostat mode is not supported on current platform\n");
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return -1;
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}
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__weak void iostat_list(struct evlist *evlist __maybe_unused,
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struct perf_stat_config *config __maybe_unused)
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{
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}
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__weak void iostat_release(struct evlist *evlist __maybe_unused)
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{
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}
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__weak void iostat_print_header_prefix(struct perf_stat_config *config __maybe_unused)
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{
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}
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__weak void iostat_print_metric(struct perf_stat_config *config __maybe_unused,
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struct evsel *evsel __maybe_unused,
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struct perf_stat_output_ctx *out __maybe_unused)
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{
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}
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__weak void iostat_prefix(struct evlist *evlist __maybe_unused,
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struct perf_stat_config *config __maybe_unused,
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char *prefix __maybe_unused,
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struct timespec *ts __maybe_unused)
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{
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}
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__weak void iostat_print_counters(struct evlist *evlist __maybe_unused,
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struct perf_stat_config *config __maybe_unused,
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struct timespec *ts __maybe_unused,
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char *prefix __maybe_unused,
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iostat_print_counter_t print_cnt_cb __maybe_unused)
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{
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}
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