From: David Ahern <dsahern@gmail.com>
To: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Cc: He Kuang <hekuang@huawei.com>,
peterz@infradead.org, mingo@redhat.com,
alexander.shishkin@linux.intel.com, jolsa@redhat.com,
wangnan0@huawei.com, jpoimboe@redhat.com, ak@linux.intel.com,
eranian@google.com, namhyung@kernel.org, adrian.hunter@intel.com,
sukadev@linux.vnet.ibm.com, masami.hiramatsu.pt@hitachi.com,
tumanova@linux.vnet.ibm.com, kan.liang@intel.com,
penberg@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/7] perf tools: Remove the logical that skip buildid cache if symfs is given
Date: Thu, 12 May 2016 14:23:37 -0600 [thread overview]
Message-ID: <5734E649.80505@gmail.com> (raw)
In-Reply-To: <20160512130925.GG20258@kernel.org>
On 5/12/16 7:09 AM, Arnaldo Carvalho de Melo wrote:
> Em Thu, May 12, 2016 at 08:43:12AM +0000, He Kuang escreveu:
>> Symfs dir and buildid dir are two places that perf looks into for
>> symbols, currently, if symfs dir is given, buildid-cache is skipped.
>>
>> In the cross-platform perf record/script scenario, we need vdsos in
>> buildid-cache dir and other libs in symfs dir at the same time. And
>> consider that the binaries indexed by buildid do not cause ambiguity,
>> this patch simply removes that logical.
>
> Makes perfect sense, David, do you have any concern? Can I have your
> Acked-by?
seems odd to me you want to look in the buildid-cache when a symfs is
given. The point of symfs was "go look for everything under here."
I believe dso__load is going to hit DSO_BINARY_TYPE__BUILD_ID_CACHE
before any of the others and there are probably cases where a stale
cache entry would be hit before a build tree entry (e.g., symfs).
What about putting the build id cache under the symfs? so instead of
dropping the symfs check and it to the path for the build id cache.
next prev parent reply other threads:[~2016-05-12 20:23 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-12 8:43 [PATCH v3 0/7] Add support for remote unwind He Kuang
2016-05-12 8:43 ` [PATCH v3 1/7] perf tools: Set vdso name to vdso[64,32] depending on platform He Kuang
2016-05-12 10:06 ` Adrian Hunter
2016-05-13 8:51 ` [PATCH v3 1/7 UPDATE] perf tools: Find vdso with the consider of cross-platform He Kuang
2016-05-16 13:32 ` Arnaldo Carvalho de Melo
2016-05-17 7:34 ` Adrian Hunter
2016-05-17 7:33 ` Adrian Hunter
2016-05-17 9:04 ` [PATCH v3 1/7 UPDATE2] " He Kuang
2016-05-17 9:17 ` Adrian Hunter
2016-05-17 12:46 ` Arnaldo Carvalho de Melo
2016-06-15 13:34 ` Arnaldo Carvalho de Melo
2016-06-16 0:22 ` Hekuang
2016-06-16 13:00 ` Adrian Hunter
2016-06-16 16:33 ` Arnaldo Carvalho de Melo
2016-05-17 9:05 ` [PATCH v3 1/7 UPDATE] " Hekuang
2016-05-13 8:53 ` [PATCH v3 1/7] perf tools: Set vdso name to vdso[64,32] depending on platform Hekuang
2016-05-12 8:43 ` [PATCH v3 2/7] perf tools: Store vdso buildid unconditionally He Kuang
2016-05-12 13:09 ` Arnaldo Carvalho de Melo
2016-05-20 6:43 ` [tip:perf/urgent] perf symbols: " tip-bot for He Kuang
2016-05-12 8:43 ` [PATCH v3 3/7] perf tools: Remove the logical that skip buildid cache if symfs is given He Kuang
2016-05-12 13:09 ` Arnaldo Carvalho de Melo
2016-05-12 20:23 ` David Ahern [this message]
2016-05-12 20:33 ` Arnaldo Carvalho de Melo
2016-05-13 7:19 ` Hekuang
2016-05-13 14:27 ` David Ahern
2016-05-13 18:01 ` Arnaldo Carvalho de Melo
2016-05-14 8:19 ` [PATCH v3 3/7 UPDATE] perf tools: Add option for the path of buildid dsos under symfs He Kuang
2016-05-14 14:43 ` David Ahern
2016-05-16 1:30 ` Hekuang
2016-05-16 2:50 ` David Ahern
2016-05-16 6:40 ` Hekuang
2016-05-18 1:47 ` Hekuang
2016-05-18 1:51 ` David Ahern
2016-05-18 2:48 ` Hekuang
2016-05-18 3:04 ` David Ahern
2016-05-12 8:43 ` [PATCH v3 4/7] perf tools: Promote proper messages for cross-platform unwind He Kuang
2016-05-12 8:43 ` [PATCH v3 5/7] perf callchain: Add support " He Kuang
2016-05-12 8:43 ` [PATCH v3 6/7] perf callchain: Support x86 target platform He Kuang
2016-05-12 8:43 ` [PATCH v3 7/7] perf callchain: Support aarch64 cross-platform He Kuang
-- strict thread matches above, loose matches on Subject: below --
2016-06-22 6:57 [PATCH 0/5] Fixes on perf unwind He Kuang
2016-06-22 6:57 ` [PATCH 1/5] perf unwind: Change macro names of perf register He Kuang
2016-06-26 10:56 ` [tip:perf/core] " tip-bot for He Kuang
2016-06-22 6:57 ` [PATCH 2/5] perf unwind: Fix wrongly used regs for x86_32 unwind He Kuang
2016-06-26 10:56 ` [tip:perf/core] " tip-bot for He Kuang
2016-06-22 6:57 ` [PATCH 3/5] perf unwind: Fix wrongly used regs for aarch64 unwind He Kuang
2016-06-26 10:57 ` [tip:perf/core] " tip-bot for He Kuang
2016-06-22 6:57 ` [PATCH 4/5] perf tools: Let python use correct gcc for build_ext He Kuang
2016-06-26 10:54 ` [tip:perf/core] " tip-bot for He Kuang
2016-06-22 6:57 ` [PATCH 5/5] perf tools: Fix NULL pointer deference when vdso not found He Kuang
2016-06-23 2:02 ` Wangnan (F)
2016-06-23 3:03 ` Hekuang
2016-06-23 12:07 ` Arnaldo Carvalho de Melo
2016-06-23 13:28 ` Arnaldo Carvalho de Melo
2016-06-26 10:55 ` [tip:perf/core] perf tools: Find right DSO taking into account if binary is 32 or 64-bit tip-bot for He Kuang
2016-06-23 13:30 ` [PATCH 0/5] Fixes on perf unwind Arnaldo Carvalho de Melo
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