From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3xMxCR0ZkpzDqlc for ; Thu, 3 Aug 2017 00:58:42 +1000 (AEST) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v72EuBc2137650 for ; Wed, 2 Aug 2017 10:58:40 -0400 Received: from e24smtp03.br.ibm.com (e24smtp03.br.ibm.com [32.104.18.24]) by mx0a-001b2d01.pphosted.com with ESMTP id 2c3g8ha725-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 02 Aug 2017 10:58:39 -0400 Received: from localhost by e24smtp03.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 2 Aug 2017 11:58:38 -0300 Received: from d24av04.br.ibm.com (d24av04.br.ibm.com [9.8.31.97]) by d24relay03.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v72EwZgh34537568 for ; Wed, 2 Aug 2017 11:58:35 -0300 Received: from d24av04.br.ibm.com (localhost [127.0.0.1]) by d24av04.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v72EwaFQ016133 for ; Wed, 2 Aug 2017 11:58:36 -0300 From: Breno Leitao To: linuxppc-dev@lists.ozlabs.org Cc: naveen.n.rao@linux.vnet.ibm.com, Breno Leitao Subject: [PATCH 1/2] powerpc/xmon: Dump ftrace buffers for the current CPU Date: Wed, 2 Aug 2017 11:58:25 -0300 Message-Id: <1501685906-10169-1-git-send-email-leitao@debian.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Current xmon 'dt' command dumps the tracing buffer for all the CPUs, which makes it very hard to read due to the fact that most of powerpc machines currently have many CPUs. Other than that, the CPU lines are interleaved in the ftrace log. This new option just dumps the ftrace buffer for the current CPU. Signed-off-by: Breno Leitao --- arch/powerpc/xmon/xmon.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 08e367e3e8c3..0cbd910193fa 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -234,6 +234,7 @@ Commands:\n\ "\ dr dump stream of raw bytes\n\ dt dump the tracing buffers (uses printk)\n\ + dtc dump the tracing buffers for current CPU (uses printk)\n\ " #ifdef CONFIG_PPC_POWERNV " dx# dump xive on CPU #\n\ @@ -2342,6 +2343,19 @@ static void dump_one_paca(int cpu) sync(); } +static void dump_tracing(void) +{ + int c; + + c = inchar(); + if (c == 'c') + ftrace_dump(DUMP_ORIG); + else + ftrace_dump(DUMP_ALL); + + tracing_on(); +} + static void dump_all_pacas(void) { int cpu; @@ -2507,6 +2521,11 @@ dump(void) } #endif + if (c == 't') { + dump_tracing(); + return; + } + if (c == '\n') termch = c; @@ -2525,9 +2544,6 @@ dump(void) dump_log_buf(); } else if (c == 'o') { dump_opal_msglog(); - } else if (c == 't') { - ftrace_dump(DUMP_ALL); - tracing_on(); } else if (c == 'r') { scanhex(&ndump); if (ndump == 0) -- 2.13.2