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perf: Convert perf header attrs into attr events

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Bypasses the attr perf header code and replaces it with a
synthesized event and processing function that accomplishes the
same thing, used when reading/writing perf data to/from a pipe.

Making the attrs into events allows them to be streamed over a
pipe along with the rest of the header data (in later patches).
It also paves the way to allowing events to be added and removed
from perf sessions dynamically.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: k-keiichi@bx.jp.nec.com
Cc: acme@ghostprotocols.net
LKML-Reference: <1270184365-8281-6-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi 2010-04-01 23:59:19 -05:00 • committed by Ingo Molnar
parent c239da3b4b
commit 2c46dbb517
8 changed files with 136 additions and 2 deletions
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10
tools/perf/builtin-record.c
View file

@ -584,6 +584,16 @@ static int __cmd_record(int argc, const char **argv)
post_processing_offset = lseek(output, 0, SEEK_CUR);
if (pipe_output) {
err = event__synthesize_attrs(&session->header,
process_synthesized_event,
session);
if (err < 0) {
pr_err("Couldn't synthesize attrs.\n");
return err;
}
}
err = event__synthesize_kernel_mmap(process_synthesized_event,
session, "_text");
if (err < 0)