From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752850AbcBEOYc (ORCPT ); Fri, 5 Feb 2016 09:24:32 -0500 Received: from mail.kernel.org ([198.145.29.136]:44864 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750859AbcBEOYb (ORCPT ); Fri, 5 Feb 2016 09:24:31 -0500 Date: Fri, 5 Feb 2016 11:24:22 -0300 From: Arnaldo Carvalho de Melo To: Stephane Eranian Cc: LKML , Peter Zijlstra , Ingo Molnar , Andi Kleen , Jiri Olsa , Namhyung Kim , Rose Belcher , Sukadev Bhattiprolu , Sonny Rao , John Mccutchan , David Ahern , Adrian Hunter , Pawel Moll Subject: Re: [PATCH v8 2/4] perf inject: add jitdump mmap injection support Message-ID: <20160205142422.GF28242@kernel.org> References: <1448874143-7269-1-git-send-email-eranian@google.com> <1448874143-7269-3-git-send-email-eranian@google.com> <20160122204405.GB2470@redhat.com> <20160204215310.GB25196@kernel.org> <20160205134731.GC28242@kernel.org> <20160205135118.GD28242@kernel.org> <20160205135717.GE28242@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160205135717.GE28242@kernel.org> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Fri, Feb 05, 2016 at 10:57:17AM -0300, Arnaldo Carvalho de Melo escreveu: > Duh: > > [acme@jouet java]$ java -agentpath:/home/acme/git/linux/tools/perf/jvmti/libjvmti.so hello > java: jvmti: jitdump in /home/acme/.debug/jit/java-jit-20160205.XXFb472a/jit-28966.dump > Hello, World > [acme@jouet java]$ Ok, so mucho progress: [acme@jouet java]$ perf record -k 1 java -agentpath:/home/acme/git/linux/tools/perf/jvmti/libjvmti.so hello java: jvmti: jitdump in /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jit-31400.dump Hello, World [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.030 MB perf.data (268 samples) ] [acme@jouet java]$ perf inject --jit -i perf.data -o perf.data.jitted [acme@jouet java]$ perf report -D -i perf.data | grep PERF_RECORD_MMAP > mmaps.before Failed to open /tmp/perf-31400.map, continuing without symbols [acme@jouet java]$ perf report -D -i perf.data. | grep PERF_RECORD_MMAP > mmaps.before perf.data.jitted perf.data.jitted.old perf.data.old [acme@jouet java]$ perf report -D -i perf.data.jitted | grep PERF_RECORD_MMAP > mmaps.jitted [acme@jouet java]$ diff -u mmaps.before mmaps.jitted --- mmaps.before 2016-02-05 11:01:16.019257683 -0300 +++ mmaps.jitted 2016-02-05 11:01:28.966232802 -0300 +77539479986521 0xfc80 [0xa0]: PERF_RECORD_MMAP2 31400/31413: [0x7f3f7d102880(0xc0) @ 0x40 fd:02 1840179 1]: --xs /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jitted-31400-281.so +77539480189814 0xfd20 [0xa0]: PERF_RECORD_MMAP2 31400/31413: [0x7f3f7d0fef60(0x80) @ 0x40 fd:02 1840180 1]: --xs /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jitted-31400-282.so +77539480541065 0xfdc0 [0xa0]: PERF_RECORD_MMAP2 31400/31413: [0x7f3f7d102560(0x180) @ 0x40 fd:02 1840181 1]: --xs /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jitted-31400-283.so +77539480541871 0xfe60 [0xa0]: PERF_RECORD_MMAP2 31400/31413: [0x7f3f7d102360(0x180) @ 0x40 fd:02 1840182 1]: --xs /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jitted-31400-284.so +77539480848667 0xff00 [0xa0]: PERF_RECORD_MMAP2 31400/31413: [0x7f3f7d102160(0x180) @ 0x40 fd:02 1840183 1]: --xs /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jitted-31400-285.so +77539480910925 0xffa0 [0xa0]: PERF_RECORD_MMAP2 31400/31413: [0x7f3f7d101f60(0x180) @ 0x40 fd:02 1840184 1]: --xs /home/acme/.debug/jit/java-jit-20160205.XXIiqiq7/jitted-31400-286.so Quite a lot of those, but I noticed this, probably harmless, at the start: 0 0x3fd8 [0x88]: PERF_RECORD_MMAP -1/0: [0xffffffffa0991000(0x5000) @ 0]: x /lib/modules/4.3.4-300.fc23.x86_64/kernel/net/dns_resolver/dns_resolver.ko.xz 0 0x4060 [0x78]: PERF_RECORD_MMAP -1/0: [0xffffffffa0996000(0x7b000) @ 0]: x /lib/modules/4.3.4-300.fc23.x86_64/kernel/fs/nfs/nfsv4.ko.xz 0 0x40d8 [0x88]: PERF_RECORD_MMAP -1/0: [0xffffffffa0a11000(0x5f5eefff) @ 0]: x /lib/modules/4.3.4-300.fc23.x86_64/kernel/drivers/usb/storage/usb-storage.ko.xz -77539437123281 0x6b98 [0xa0]: PERF_RECORD_MMAP2 31400/31400: [0x557b73152000(0x202000) @ 0 fd:00 7858 3897326142]: r-xp /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.71-1.b15.fc23.x86_64/jre/bin/java +77539437123281 0x42a0 [0xa0]: PERF_RECORD_MMAP2 31400/31400: [0x557b73152000(0x202000) @ 0 fd:00 7858 3897326142]: r-xp /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.71-1.b15.fc23.x86_64/jre/bin/java I.e. the MMAP records for the kernel modules comes in ok, humm, because probably you don't hook on PERF_RECORD_MMAP in perf-inject, just on MMAP2, and in those the only difference is the second field, 0x6b98 -> 0x42a0, what is that? static void dump_event(struct perf_evlist *evlist, union perf_event *event, u64 file_offset, struct perf_sample *sample) { if (sample) perf_evlist__print_tstamp(evlist, event, sample); printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, event->header.size, perf_event__name(event->header.type)); File offset, what changed? -0x7c18 [0x8]: event: 68 -. -. ... raw event: size 8 bytes -. 0000: 44 00 00 00 00 00 08 00 D....... -. -0x7c18 [0x8]: PERF_RECORD_FINISHED_ROUND - -0x6a80 [0x28]: event: 9 Humm, inject doesn't preserves PERF_RECORD_FINISHED_ROUND? Or user events in general? On purpose? - Arnaldo