2012-08-07 13:20:43 +00:00
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#ifndef __PERF_REGS_H
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#define __PERF_REGS_H
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2014-04-25 19:31:02 +00:00
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#include <linux/types.h>
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2015-09-24 21:53:49 +00:00
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#include <linux/compiler.h>
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perf tools: Cache register accesses for unwind processing
Caching registers value into an array. Got about 4% speed up
of perf_reg_value function for report command processing
dwarf unwind stacks.
Output from report over 1.5 GB data with DWARF unwind stacks:
(TODO fix perf diff)
current code:
5.84% perf perf [.] perf_reg_value
change:
1.94% perf perf [.] perf_reg_value
And little bit of overall speed up:
(perf stat -r 5 -e '{cycles,instructions}:u' ...)
current code:
310,298,611,754 cycles ( +- 0.33% )
439,669,689,341 instructions ( +- 0.03% )
188.656753166 seconds time elapsed ( +- 0.82% )
change:
291,315,329,878 cycles ( +- 0.22% )
391,763,485,304 instructions ( +- 0.03% )
180.742249687 seconds time elapsed ( +- 0.64% )
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-2-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-04-17 17:39:10 +00:00
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struct regs_dump;
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2014-01-07 12:47:29 +00:00
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2015-08-31 16:41:11 +00:00
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struct sample_reg {
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const char *name;
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uint64_t mask;
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};
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2015-09-01 09:30:14 +00:00
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#define SMPL_REG(n, b) { .name = #n, .mask = 1ULL << (b) }
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#define SMPL_REG_END { .name = NULL }
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2015-08-31 16:41:11 +00:00
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extern const struct sample_reg sample_reg_masks[];
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2013-09-30 10:07:11 +00:00
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#ifdef HAVE_PERF_REGS_SUPPORT
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2012-08-07 13:20:43 +00:00
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#include <perf_regs.h>
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2014-01-07 12:47:29 +00:00
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int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);
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2012-08-07 13:20:43 +00:00
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#else
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#define PERF_REGS_MASK 0
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perf tools: Cache register accesses for unwind processing
Caching registers value into an array. Got about 4% speed up
of perf_reg_value function for report command processing
dwarf unwind stacks.
Output from report over 1.5 GB data with DWARF unwind stacks:
(TODO fix perf diff)
current code:
5.84% perf perf [.] perf_reg_value
change:
1.94% perf perf [.] perf_reg_value
And little bit of overall speed up:
(perf stat -r 5 -e '{cycles,instructions}:u' ...)
current code:
310,298,611,754 cycles ( +- 0.33% )
439,669,689,341 instructions ( +- 0.03% )
188.656753166 seconds time elapsed ( +- 0.82% )
change:
291,315,329,878 cycles ( +- 0.22% )
391,763,485,304 instructions ( +- 0.03% )
180.742249687 seconds time elapsed ( +- 0.64% )
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-2-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
2014-04-17 17:39:10 +00:00
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#define PERF_REGS_MAX 0
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2012-08-07 13:20:43 +00:00
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2012-09-10 22:15:03 +00:00
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static inline const char *perf_reg_name(int id __maybe_unused)
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2012-08-07 13:20:43 +00:00
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{
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return NULL;
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}
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2014-01-07 12:47:29 +00:00
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static inline int perf_reg_value(u64 *valp __maybe_unused,
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struct regs_dump *regs __maybe_unused,
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int id __maybe_unused)
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{
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return 0;
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}
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2013-09-30 10:07:11 +00:00
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#endif /* HAVE_PERF_REGS_SUPPORT */
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2012-08-07 13:20:43 +00:00
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#endif /* __PERF_REGS_H */
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