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Message-ID: <20100519201137.GA26284@ghostprotocols.net> Date: Wed, 19 May 2010 17:11:37 -0300 From: Arnaldo Carvalho de Melo <acme@...radead.org> To: Stephane Eranian <eranian@...gle.com> Cc: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, Frédéric Weisbecker <fweisbec@...il.com>, Mike Galbraith <efault@....de>, Paul Mackerras <paulus@...ba.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Tom Zanussi <tzanussi@...il.com> Subject: Re: [GIT PULL 0/2] perf session fix host_machine handling wrt build ids Em Wed, May 19, 2010 at 09:36:45PM +0200, Stephane Eranian escreveu: > Hi, > > On Wed, May 19, 2010 at 7:01 PM, Arnaldo Carvalho de Melo > <acme@...radead.org> wrote: > > Hi Ingo, > > > > Please pull from: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 perf > > > > Stephane and Tom, > > > > Now the build id code should be back working: > > > > [root@...pio linux-2.6-tip]# rm -rf /root/.debug/ > > [root@...pio linux-2.6-tip]# perf record find / > /dev/null > > ^C[ perf record: Woken up 3 times to write data ] > > [ perf record: Captured and wrote 0.667 MB perf.data (~29163 samples) ] > > [root@...pio linux-2.6-tip]# perf buildid-list > > 349199a1e1b7cc25ac4f7004deed260f0146665e [kernel.kallsyms] > > > It is working again for me too. Thanks for the quick fix. Great, and thanks for the "quick" part, myself I thought it took more time than needed :-) > Related to .debug, I think it would be useful to have a choice as to > where all that stuff gets saved. It is hardcoded to $HOME today. > > We could provide: > - an environment variable, e.g., PERFHOME or PERFDEBUGDIR > - an option to perf record, perf report, perf annotate, i.e., all commands > that use .debug > > I looked at that today and I have a draft patch to add both the variable > + the option. > Yeah, the NO_NEWT make target was out of our uneasyness about making newt the sole report output, and my patch removing tons of code stolen but not used (greedy us!) was also in that direction, trying to get the git ~/.CONFIG way into perf. We have to have that and consistent accross the tools command line options to override where this is stored/used. > The problem with the environment variable is that you tend to forget to > set it. As you suggest below, you may run perf report on another machine > too and you don't necessarily want to overwrite the .debug you may already Well, we wouldn't be overwriting anything since we hope that what is used to create the buildid is reasonably safe against collision, so even if the DSOs are for different arches, it should be rather difficult to get 'perf unarchive' causing problems. > have in your $HOME dir. I think the option has the advantage of making this > explicit. It would still default to $HOME if not set. > > > 1f095dcd586045d7aa158b4774b8b053e7f580a4 /lib/modules/2.6.34-rc6/kernel/net/ipv4/netfilter/nf_nat.ko > > 78913cef49182f29a0237d9867ff12811df00663 /lib/modules/2.6.34-rc6/kernel/drivers/md/dm-crypt.ko > > 5b2b076ef0b0be593d76c96fbd4393455380e589 /lib/modules/2.6.34-rc6/kernel/drivers/ata/sata_sil.ko > > b6c457f3d69870e6f68f2c61978f8e3beb25221c /lib/modules/2.6.34-rc6/kernel/drivers/net/e1000e/e1000e.ko > > 2249bf363819205e320e242af2e757906be5010e /lib/modules/2.6.34-rc6/kernel/drivers/gpu/drm/i915/i915.ko > > a8e4f743b40fb1fd8b85e2f9b88d93b661472b8f /bin/find > > eb4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 /lib64/libc-2.10.2.so > > 5c68f7afeb33309c78037e374b0deee84dd441f6 /lib64/libpthread-2.10.2.so > > [root@...pio linux-2.6-tip]# ls -la /root/.debug/ > > total 28 > > drwxr-xr-x 7 root root 4096 Mai 19 13:56 . > > drwxr-x---. 31 root root 4096 Mai 19 13:56 .. > > drwxr-xr-x 3 root root 4096 Mai 19 13:56 bin > > drwxr-xr-x 76 root root 4096 Mai 19 13:56 .build-id > > drwxr-xr-x 2 root root 4096 Mai 19 13:56 [kernel.kallsyms] > > drwxr-xr-x 3 root root 4096 Mai 19 13:56 lib > > drwxr-xr-x 4 root root 4096 Mai 19 13:56 lib64 > > [root@...pio linux-2.6-tip]# ls -la /root/.debug/.build-id/ > > 03/ 0c/ 13/ 1e/ 20/ 28/ 2b/ 2d/ 34/ 3b/ 3f/ 47/ 56/ 5b/ 5e/ 6e/ 72/ 7e/ > > 85/ 87/ 94/ 98/ a0/ a5/ a8/ ac/ bc/ c8/ cc/ d9/ dd/ e2/ e8/ eb/ ef/ f2/ > > fd/ 0b/ 0e/ 19/ 1f/ 22/ 29/ 2c/ 2e/ 39/ 3e/ 42/ 55/ 57/ 5c/ 62/ 6f/ 78/ > > 80/ 86/ 91/ 97/ 99/ a1/ a7/ a9/ b6/ c6/ ca/ d8/ dc/ df/ e3/ e9/ ed/ f1/ > > fa/ fe/ > > [root@...pio linux-2.6-tip]# ls -la /root/.debug/lib64/libc-2.10.2.so/eb4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 > > -rwxr-xr-x 2 root root 1825560 Nov 20 09:29 /root/.debug/lib64/libc-2.10.2.so/eb4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 > > [root@...pio linux-2.6-tip]# ls -la /root/.debug/.build-id/eb/4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 > > lrwxrwxrwx 1 root root 67 Mai 19 13:56 /root/.debug/.build-id/eb/4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 -> ../../lib64/libc-2.10.2.so/eb4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 > > [root@...pio linux-2.6-tip]# > > [root@...pio linux-2.6-tip]# perf archive > > Now please run: > > > > $ tar xvf perf.data.tar.bz2 -C ~/.debug > > > > wherever you need to run 'perf report' on. > > [root@...pio linux-2.6-tip]# > > > > ot@...pio linux-2.6-tip]# tar tvf perf.data.tar.bz2 > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/34/9199a1e1b7cc25ac4f7004deed260f0146665e -> ../../[kernel.kallsyms]/349199a1e1b7cc25ac4f7004deed260f0146665e > > -rw-r--r-- root/root 2842888 2010-05-19 13:56 [kernel.kallsyms]/349199a1e1b7cc25ac4f7004deed260f0146665e > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/1f/095dcd586045d7aa158b4774b8b053e7f580a4 -> ../../lib/modules/2.6.34-rc6/kernel/net/ipv4/netfilter/nf_nat.ko/1f095dcd586045d7aa158b4774b8b053e7f580a4 > > -rw-r--r-- root/root 1670552 2010-04-30 11:43 lib/modules/2.6.34-rc6/kernel/net/ipv4/netfilter/nf_nat.ko/1f095dcd586045d7aa158b4774b8b053e7f580a4 > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/78/913cef49182f29a0237d9867ff12811df00663 -> ../../lib/modules/2.6.34-rc6/kernel/drivers/md/dm-crypt.ko/78913cef49182f29a0237d9867ff12811df00663 > > -rw-r--r-- root/root 326827 2010-04-30 11:43 lib/modules/2.6.34-rc6/kernel/drivers/md/dm-crypt.ko/78913cef49182f29a0237d9867ff12811df00663 > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/5b/2b076ef0b0be593d76c96fbd4393455380e589 -> ../../lib/modules/2.6.34-rc6/kernel/drivers/ata/sata_sil.ko/5b2b076ef0b0be593d76c96fbd4393455380e589 > > -rw-r--r-- root/root 325915 2010-04-30 11:43 lib/modules/2.6.34-rc6/kernel/drivers/ata/sata_sil.ko/5b2b076ef0b0be593d76c96fbd4393455380e589 > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/b6/c457f3d69870e6f68f2c61978f8e3beb25221c -> ../../lib/modules/2.6.34-rc6/kernel/drivers/net/e1000e/e1000e.ko/b6c457f3d69870e6f68f2c61978f8e3beb25221c > > -rw-r--r-- root/root 2587163 2010-04-30 11:43 lib/modules/2.6.34-rc6/kernel/drivers/net/e1000e/e1000e.ko/b6c457f3d69870e6f68f2c61978f8e3beb25221c > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/22/49bf363819205e320e242af2e757906be5010e -> ../../lib/modules/2.6.34-rc6/kernel/drivers/gpu/drm/i915/i915.ko/2249bf363819205e320e242af2e757906be5010e > > -rw-r--r-- root/root 8296246 2010-04-30 11:43 lib/modules/2.6.34-rc6/kernel/drivers/gpu/drm/i915/i915.ko/2249bf363819205e320e242af2e757906be5010e > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/a8/e4f743b40fb1fd8b85e2f9b88d93b661472b8f -> ../../bin/find/a8e4f743b40fb1fd8b85e2f9b88d93b661472b8f > > -rwxr-xr-x root/root 233032 2009-02-24 14:13 bin/find/a8e4f743b40fb1fd8b85e2f9b88d93b661472b8f > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/eb/4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 -> ../../lib64/libc-2.10.2.so/eb4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 > > -rwxr-xr-x root/root 1825560 2009-11-20 09:29 lib64/libc-2.10.2.so/eb4ec8fa8b2a5eb18cad173c92f27ed8887ed1c1 > > lrwxrwxrwx root/root 0 2010-05-19 13:56 .build-id/5c/68f7afeb33309c78037e374b0deee84dd441f6 -> ../../lib64/libpthread-2.10.2.so/5c68f7afeb33309c78037e374b0deee84dd441f6 > > -rwxr-xr-x root/root 148528 2009-11-20 09:29 lib64/libpthread-2.10.2.so/5c68f7afeb33309c78037e374b0deee84dd441f6 > > [root@...pio linux-2.6-tip]# > > > > Regards, > > > > - Arnaldo > > > > Arnaldo Carvalho de Melo (2): > > perf symbols: Don't try to read the build-id twice > > perf session: Make read_build_id routines look at the host_machine too > > > > tools/perf/util/header.c | 84 ++++++++++++++++++++++++++++----------------- > > tools/perf/util/session.c | 7 ++++ > > tools/perf/util/session.h | 8 +--- > > tools/perf/util/symbol.c | 13 ++++++- > > tools/perf/util/symbol.h | 1 + > > 5 files changed, 73 insertions(+), 40 deletions(-) > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to 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