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When the callgraph function is enabled (-G), it may take a long time to scan all the stack data and merge them accordingly. This patch adds a new --max-stack option to perf-top to limit the depth of callchain stack data to look at to reduce the time it takes for perf-top to finish its processing. It reduces the amount of information provided to the user in exchange for faster speed. Signed-off-by: Waiman Long <Waiman.Long@hp.com> Acked-by: David Ahern <dsahern@gmail.com> Tested-by: Davidlohr Bueso <davidlohr@hp.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Aswin Chandramouleeswaran <aswin@hp.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Scott J Norton <scott.norton@hp.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1382107129-2010-5-git-send-email-Waiman.Long@hp.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
#ifndef __PERF_TOP_H
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#define __PERF_TOP_H 1
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#include "tool.h"
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#include "types.h"
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#include <stddef.h>
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#include <stdbool.h>
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#include <termios.h>
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struct perf_evlist;
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struct perf_evsel;
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struct perf_session;
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struct perf_top {
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struct perf_tool tool;
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struct perf_evlist *evlist;
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struct perf_record_opts record_opts;
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/*
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* Symbols will be added here in perf_event__process_sample and will
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* get out after decayed.
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*/
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u64 samples;
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u64 kernel_samples, us_samples;
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u64 exact_samples;
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u64 guest_us_samples, guest_kernel_samples;
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int print_entries, count_filter, delay_secs;
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int max_stack;
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bool hide_kernel_symbols, hide_user_symbols, zero;
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bool use_tui, use_stdio;
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bool kptr_restrict_warned;
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bool vmlinux_warned;
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bool dump_symtab;
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struct hist_entry *sym_filter_entry;
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struct perf_evsel *sym_evsel;
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struct perf_session *session;
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struct winsize winsize;
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int realtime_prio;
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int sym_pcnt_filter;
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const char *sym_filter;
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float min_percent;
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};
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#define CONSOLE_CLEAR "[H[2J"
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size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size);
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void perf_top__reset_sample_counters(struct perf_top *top);
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#endif /* __PERF_TOP_H */
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