[{"id":3685471,"web_url":"http://patchwork.ozlabs.org/comment/3685471/","msgid":"<aff7JnNuWpj4Mvss@z2>","date":"2026-05-04T01:49:26","subject":"Re: [PATCH V3 1/2] tools/perf: Fix the check for parameterized field\n in event term","submitter":{"id":20789,"url":"http://patchwork.ozlabs.org/api/people/20789/","name":"Namhyung Kim","email":"namhyung@kernel.org"},"content":"On Sat, May 02, 2026 at 07:42:57PM +0530, Athira Rajeev wrote:\n> The format_alias() function in util/pmu.c has a check to\n> detect whether the event has parameterized field ( =? ).\n> The string alias->terms contains the event and if the event\n> has user configurable parameter, there will be presence of\n> sub string \"=?\" in the alias->terms.\n> \n> Snippet of code:\n> \n>  /* Paramemterized events have the parameters shown. */\n>        if (strstr(alias->terms, \"=?\")) {\n>                /* No parameters. */\n>                snprintf(buf, len, \"%.*s/%s/\", (int)pmu_name_len, pmu->name, alias->name);\n> \n> if \"strstr\" contains the substring, it returns a pointer\n> and hence enters the above check which is not the expected\n> check. And hence \"perf list\" doesn't have the parameterized\n> fields in the result.\n> \n> Fix this check to use:\n> \n> if (!strstr(alias->terms, \"=?\")) {\n> \n> With this change, perf list shows the events correctly with\n> the strings showing parameters.\n\nAny real examples?\n\nThanks,\nNamhyung\n\n> \n> Signed-off-by: Athira Rajeev <atrajeev@linux.ibm.com>\n> ---\n> Changelog:\n> v2 -> v3:\n> Split the strstr correction in a single patch\n> \n>  tools/perf/util/pmu.c | 2 +-\n>  1 file changed, 1 insertion(+), 1 deletion(-)\n> \n> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c\n> index 23337d2fa281..0b8d58543f17 100644\n> --- a/tools/perf/util/pmu.c\n> +++ b/tools/perf/util/pmu.c\n> @@ -2117,7 +2117,7 @@ static char *format_alias(char *buf, int len, const struct perf_pmu *pmu,\n>  \t\t\t\t\t\t   skip_duplicate_pmus);\n>  \n>  \t/* Paramemterized events have the parameters shown. */\n> -\tif (strstr(alias->terms, \"=?\")) {\n> +\tif (!strstr(alias->terms, \"=?\")) {\n>  \t\t/* No parameters. */\n>  \t\tsnprintf(buf, len, \"%.*s/%s/\", (int)pmu_name_len, pmu->name, alias->name);\n>  \t\treturn buf;\n> -- \n> 2.47.3\n>","headers":{"Return-Path":"\n <linuxppc-dev+bounces-20393-incoming=patchwork.ozlabs.org@lists.ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=kJncZUcT;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777859368;\n\tbh=UxNq48/xbu0OvKDwkGIsg6liRabxxjbEHw+/9JiWl3o=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=kJncZUcTdPQY5pjU3vl2D7/Zzm4ANjgyl8Al7X26x4TXYHwAMNXdBCIICyb7s/L9G\n\t YP6X2CicFiinb14LdH2JW+195aOaA0Rj0GgYkFde83r3MfvVj7qIWN5UY5cljgs0AB\n\t l0rORGmOOxg1dhL/99CC+QJWgNTQSBwedNi1JMflEnl1gVN7Emc1LEZ+8IEH73l5Xv\n\t Yod4f/aH7Joak6kKk7VGnWN2EZmQIQMfeImh6gcnE6K4tY4oOSFkMsbxZ+0sKoNGSm\n\t PPMP1gLMsSqAtgG0aD2iQkdD91dPeJAyWzeXPFXYUW57tEx5Xh6FKgRIcXbhhVLnVM\n\t uHVT54pRnBsdw==","Date":"Sun, 3 May 2026 18:49:26 -0700","From":"Namhyung Kim <namhyung@kernel.org>","To":"Athira Rajeev <atrajeev@linux.ibm.com>","Cc":"acme@kernel.org, jolsa@kernel.org, adrian.hunter@intel.com,\n\tmpetlan@redhat.com, tmricht@linux.ibm.com, maddy@linux.ibm.com,\n\tirogers@google.com, linux-perf-users@vger.kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org, hbathini@linux.vnet.ibm.com,\n\tTejas.Manhas1@ibm.com, Tanushree.Shah@ibm.com,\n\tshivani@linux.ibm.com","Subject":"Re: [PATCH V3 1/2] tools/perf: Fix the check for parameterized field\n in event term","Message-ID":"<aff7JnNuWpj4Mvss@z2>","References":"<20260502141258.17128-1-atrajeev@linux.ibm.com>","X-Mailing-List":"linuxppc-dev@lists.ozlabs.org","List-Id":"<linuxppc-dev.lists.ozlabs.org>","List-Help":"<mailto:linuxppc-dev+help@lists.ozlabs.org>","List-Owner":"<mailto:linuxppc-dev+owner@lists.ozlabs.org>","List-Post":"<mailto:linuxppc-dev@lists.ozlabs.org>","List-Archive":"<https://lore.kernel.org/linuxppc-dev/>,\n  <https://lists.ozlabs.org/pipermail/linuxppc-dev/>","List-Subscribe":"<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n  <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n  <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>","List-Unsubscribe":"<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>","Precedence":"list","MIME-Version":"1.0","Content-Type":"text/plain; charset=utf-8","Content-Disposition":"inline","In-Reply-To":"<20260502141258.17128-1-atrajeev@linux.ibm.com>","X-Spam-Status":"No, score=-0.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"}},{"id":3685490,"web_url":"http://patchwork.ozlabs.org/comment/3685490/","msgid":"<3471B9C5-1CCC-4839-9390-10D28C3846C6@linux.ibm.com>","date":"2026-05-04T04:17:44","subject":"Re: [PATCH V3 1/2] tools/perf: Fix the check for parameterized field\n in event term","submitter":{"id":90290,"url":"http://patchwork.ozlabs.org/api/people/90290/","name":"Athira Rajeev","email":"atrajeev@linux.ibm.com"},"content":"> On 4 May 2026, at 7:19 AM, Namhyung Kim <namhyung@kernel.org> wrote:\n> \n> On Sat, May 02, 2026 at 07:42:57PM +0530, Athira Rajeev wrote:\n>> The format_alias() function in util/pmu.c has a check to\n>> detect whether the event has parameterized field ( =? ).\n>> The string alias->terms contains the event and if the event\n>> has user configurable parameter, there will be presence of\n>> sub string \"=?\" in the alias->terms.\n>> \n>> Snippet of code:\n>> \n>> /* Paramemterized events have the parameters shown. */\n>>       if (strstr(alias->terms, \"=?\")) {\n>>               /* No parameters. */\n>>               snprintf(buf, len, \"%.*s/%s/\", (int)pmu_name_len, pmu->name, alias->name);\n>> \n>> if \"strstr\" contains the substring, it returns a pointer\n>> and hence enters the above check which is not the expected\n>> check. And hence \"perf list\" doesn't have the parameterized\n>> fields in the result.\n>> \n>> Fix this check to use:\n>> \n>> if (!strstr(alias->terms, \"=?\")) {\n>> \n>> With this change, perf list shows the events correctly with\n>> the strings showing parameters.\n> \n> Any real examples?\n\nSure, I will update the commit message\n\nThanks\nAthira\n> \n> Thanks,\n> Namhyung\n> \n>> \n>> Signed-off-by: Athira Rajeev <atrajeev@linux.ibm.com>\n>> ---\n>> Changelog:\n>> v2 -> v3:\n>> Split the strstr correction in a single patch\n>> \n>> tools/perf/util/pmu.c | 2 +-\n>> 1 file changed, 1 insertion(+), 1 deletion(-)\n>> \n>> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c\n>> index 23337d2fa281..0b8d58543f17 100644\n>> --- a/tools/perf/util/pmu.c\n>> +++ b/tools/perf/util/pmu.c\n>> @@ -2117,7 +2117,7 @@ static char *format_alias(char *buf, int len, const struct perf_pmu *pmu,\n>>    skip_duplicate_pmus);\n>> \n>> /* Paramemterized events have the parameters shown. */\n>> - if (strstr(alias->terms, \"=?\")) {\n>> + if (!strstr(alias->terms, \"=?\")) {\n>> /* No parameters. */\n>> snprintf(buf, len, \"%.*s/%s/\", (int)pmu_name_len, pmu->name, alias->name);\n>> return buf;\n>> -- \n>> 2.47.3","headers":{"Return-Path":"\n <linuxppc-dev+bounces-20396-incoming=patchwork.ozlabs.org@lists.ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=VKjimKIH;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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