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Tue, 3 Dec 2024 18:59:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733252367; bh=1fbTUMacT40S5XPIFq1DQejZBWsfq13vv44sCVChst0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fLnlRltkm9E8tH6Y78o7TT6yMaTgXm6vcGpL3J68l9JxM7Sk0FwMsO/v4dNrUSFKd DwVWFEUVn6AhZvGJAxelo8OOAkGxn+Bky/o0Y0t3TCkyWMWWWkPLgNRlGLdqdRPxtQ W23zCjNN/DQ0UBYMslidTfFl/ORMoVCrxGklYxSnmMatVHntRLYFH7nz3R5+PiVdA7 oqPIywFVxd3zwru+BRbhIviM/Co4A6mEbJBn5FXQucghacf/EQZDGSqWkbF00dLaKm gA2FxE2UlwJwMlumh9qJRiNvbiSYWJw1aB3ROn/T+DIhTX9idBOZMFmPI1WSLVhFwk QLXOrvPLLG4FA== Date: Tue, 3 Dec 2024 10:59:25 -0800 From: Namhyung Kim To: Athira Rajeev Cc: Leo Yan , Ian Rogers , James Clark , tmricht@linux.ibm.com, acme@kernel.org, jolsa@kernel.org, adrian.hunter@intel.com, linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, akanksha@linux.ibm.com, maddy@linux.ibm.com, kjain@linux.ibm.com, disgoel@linux.vnet.ibm.com, hbathini@linux.ibm.com, Sasha Levin Subject: Re: [PATCH] tools/perf/tests/expr: Make the system_tsc_freq test only for intel Message-ID: References: <20241022140156.98854-1-atrajeev@linux.vnet.ibm.com> <20241107135606.GA47850@e132581.arm.com> <0F805B2F-35CC-4E0C-BD2F-84552C4C528E@linux.vnet.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, Dec 03, 2024 at 10:42:45AM -0800, Namhyung Kim wrote: > On Tue, Dec 03, 2024 at 10:16:06AM -0800, Namhyung Kim wrote: > > Hello, > > > > On Fri, Nov 08, 2024 at 10:50:10AM +0530, Athira Rajeev wrote: > > > > > > > > > > On 7 Nov 2024, at 7:26 PM, Leo Yan wrote: > > > > > > > > Hi Athira, > > > > > > > > On Wed, Nov 06, 2024 at 03:04:57PM +0530, Athira Rajeev wrote: > > > > > > > > [...] > > > > > > > >>> Hi Athira, > > > >>> > > > >>> sorry for the breakage and thank you for the detailed explanation. As > > > >>> the code will run on AMD I think your change will break that - . It is > > > >>> probably safest to keep the ".. else { .." for this case but guard it > > > >>> in the ifdef. > > > >>> > > > >> > > > >> Hi Ian > > > >> > > > >> Thanks for your comments. Does the below change looks good ? > > > >> > > > >> diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c > > > >> index e3aa9d4fcf3a..f5b2d96bb59b 100644 > > > >> --- a/tools/perf/tests/expr.c > > > >> +++ b/tools/perf/tests/expr.c > > > >> @@ -74,14 +74,12 @@ static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_u > > > >> double val, num_cpus_online, num_cpus, num_cores, num_dies, num_packages; > > > >> int ret; > > > >> struct expr_parse_ctx *ctx; > > > >> - bool is_intel = false; > > > >> char strcmp_cpuid_buf[256]; > > > >> struct perf_pmu *pmu = perf_pmus__find_core_pmu(); > > > >> char *cpuid = perf_pmu__getcpuid(pmu); > > > >> char *escaped_cpuid1, *escaped_cpuid2; > > > >> > > > >> TEST_ASSERT_VAL("get_cpuid", cpuid); > > > >> - is_intel = strstr(cpuid, "Intel") != NULL; > > > >> > > > >> TEST_ASSERT_EQUAL("ids_union", test_ids_union(), 0); > > > >> > > > >> @@ -244,11 +242,13 @@ static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_u > > > >> if (num_dies) // Some platforms do not have CPU die support, for example s390 > > > >> TEST_ASSERT_VAL("#num_dies >= #num_packages", num_dies >= num_packages); > > > >> > > > >> +#if defined(__i386__) && defined(__x86_64__) > > > >> TEST_ASSERT_VAL("#system_tsc_freq", expr__parse(&val, ctx, "#system_tsc_freq") == 0); > > > >> - if (is_intel) > > > >> + if (strstr(cpuid, "Intel") != NULL) > > > >> TEST_ASSERT_VAL("#system_tsc_freq > 0", val > 0); > > > >> else > > > >> TEST_ASSERT_VAL("#system_tsc_freq == 0", fpclassify(val) == FP_ZERO); > > > >> +#endif > > > >> > > > >> /* > > > >> * Source count returns the number of events aggregating in a leader > > > > > > > > I confirmed the change above fixes the failure on Arm64. > > > > > > > > Tested-by: Leo Yan > > > Thanks Leo Yan for testing. > > > > > > Hi Ian, > > > > > > If the change above looks good, I will post a V2 . Please share your review comments > > > > Sorry for the delay, it looks good to me. Can you please send the v2? > > After looking at another report, I think we need to check the value of > TSC freq, not just the vendor. Can you please test this? Oops, nevermind. I've realized we have two different issues at the same time. So !x86 archs should not use #system_tsc_freq at all, and only *some* of (real) Intel machines have the value actually. Hmm... I think we need the original v2 here, and check the value even on Intel separately. Thanks, Namhyung