From: Kieran Bingham <kieran.bingham@linaro.org>
To: jan.kiszka@siemens.com, linux-kernel@vger.kernel.org
Cc: lee.jones@linaro.org, peter.griffin@linaro.org,
maxime.coquelin@st.com,
Kieran Bingham <kieran.bingham@linaro.org>
Subject: [PATCHv3 12/13] scripts/gdb: Add interrupts command
Date: Thu, 3 Mar 2016 11:41:06 +0000 [thread overview]
Message-ID: <1457005267-843-13-git-send-email-kieran.bingham@linaro.org> (raw)
In-Reply-To: <1457005267-843-1-git-send-email-kieran.bingham@linaro.org>
Allow the debugger to present a list of all interrupts and their
associated counts. This will allow developers of drivers to identify
hardware interactions in the event of crashed kernels and core dumps.
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
---
scripts/gdb/linux/constants.py.in | 1 +
scripts/gdb/linux/proc.py | 65 +++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+)
diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index b38b9085c702..17b719ead54f 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -84,6 +84,7 @@ LX_CONFIG(CONFIG_TRANSPARENT_HUGEPAGE)
LX_CONFIG(CONFIG_CMA)
LX_CONFIG(CONFIG_MMU)
LX_CONFIG(CONFIG_SWAP)
+LX_CONFIG(CONFIG_SPARSE_IRQ)
#ifndef CONFIG_NR_QUICK
#define CONFIG_NR_QUICK 0
diff --git a/scripts/gdb/linux/proc.py b/scripts/gdb/linux/proc.py
index e5a8dbe3aa3a..0676a14e8d48 100644
--- a/scripts/gdb/linux/proc.py
+++ b/scripts/gdb/linux/proc.py
@@ -16,6 +16,8 @@ from linux import constants
from linux import utils
from linux import tasks
from linux import lists
+from linux import cpus
+from linux import radixtree
class LxCmdLine(gdb.Command):
@@ -423,3 +425,66 @@ Equivalent to cat /proc/meminfo on a running target """
)
LxMeminfo()
+
+irq_desc = None
+irq_desc_type = utils.CachedType("struct irq_desc")
+
+
+class LxInterrupts(gdb.Command):
+ """ Report the interrupt counters of each CPU.
+ Equivalent to cat /proc/interrupts on a running target """
+
+ def __init__(self):
+ super(LxInterrupts, self).__init__("lx-interrupts", gdb.COMMAND_DATA)
+
+ def irq_to_desc(self, irq):
+ if constants.LX_CONFIG_SPARSE_IRQ:
+ irq_desc_tree = gdb.parse_and_eval("irq_desc_tree")
+ irq_desc_addr = radixtree.lookup(irq_desc_tree, irq)
+
+ if irq_desc_addr is None:
+ return None
+
+ if irq_desc_addr.address:
+ return irq_desc_addr.cast(irq_desc_type.get_type())
+ return None
+ else:
+ irq_desc_array = "irq_desc[{}]".format(irq)
+ return gdb.parse_and_eval(irq_desc_array)
+
+ def kstat_irqs_cpu(self, irq_desc, cpu):
+ return int(cpus.per_cpu(irq_desc['kstat_irqs'], cpu))
+
+ def invoke(self, arg, from_tty):
+ nr_irqs = int(gdb.parse_and_eval("nr_irqs"))
+
+ # Calculate the width of the first column
+ prec = 3
+ j = nr_irqs
+ while (j <= nr_irqs):
+ j *= 10
+ prec += 1
+
+ title = "{:{}}".format(" ", prec+8)
+ for cpu in cpus.each_online_cpu():
+ title += "CPU{:<8d}".format(cpu)
+ gdb.write(title + "\n")
+
+ for irq in range(0, nr_irqs):
+ desc = self.irq_to_desc(irq)
+ if desc is None:
+ continue
+
+ anycount = 0
+ for cpu in cpus.each_online_cpu():
+ anycount += self.kstat_irqs_cpu(desc, cpu)
+ if (anycount == 0):
+ continue
+
+ irq_line = "{:{}d}: ".format(irq, prec)
+ for cpu in cpus.each_online_cpu():
+ count = self.kstat_irqs_cpu(desc, cpu)
+ irq_line += "{:10d} ".format(count)
+ gdb.write(irq_line + "\n")
+
+LxInterrupts()
--
2.5.0
next prev parent reply other threads:[~2016-03-03 11:43 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-03 11:40 [PATCHv3 00/13] scripts/gdb: Linux awareness debug commands Kieran Bingham
2016-03-03 11:40 ` [PATCHv3 01/13] scripts/gdb: Provide linux constants Kieran Bingham
2016-03-03 11:40 ` [PATCHv3 02/13] scripts/gdb: Provide kernel list item generators Kieran Bingham
2016-03-08 3:47 ` Jeff Mahoney
2016-03-08 7:55 ` Kieran Bingham
2016-03-03 11:40 ` [PATCHv3 03/13] scripts/gdb: Convert modules usage to lists functions Kieran Bingham
2016-03-03 11:40 ` [PATCHv3 04/13] scripts/gdb: Provide exception catching parser Kieran Bingham
2016-03-03 11:40 ` [PATCHv3 05/13] scripts/gdb: Support !CONFIG_MODULES gracefully Kieran Bingham
2016-03-03 11:41 ` [PATCHv3 06/13] scripts/gdb: Provide a dentry_name VFS path helper Kieran Bingham
2016-03-03 11:41 ` [PATCHv3 07/13] scripts/gdb: Add io resource readers Kieran Bingham
2016-03-03 11:41 ` [PATCHv3 08/13] scripts/gdb: Add mount point list command Kieran Bingham
2016-03-13 16:34 ` Jan Kiszka
2016-03-14 14:39 ` Kieran Bingham
2016-03-14 15:05 ` Jan Kiszka
2016-03-15 10:46 ` Kieran Bingham
2016-03-03 11:41 ` [PATCHv3 09/13] scripts/gdb: Add meminfo command Kieran Bingham
2016-03-13 16:34 ` Jan Kiszka
2016-03-13 18:16 ` Kieran Bingham
2016-03-13 19:08 ` Jan Kiszka
2016-03-14 12:13 ` Kieran Bingham
2016-03-03 11:41 ` [PATCHv3 10/13] scripts/gdb: Add cpu iterators Kieran Bingham
2016-03-13 16:33 ` Jan Kiszka
2016-03-13 18:39 ` Kieran Bingham
2016-03-03 11:41 ` [PATCHv3 11/13] scripts/gdb: Add a Radix Tree Parser Kieran Bingham
2016-03-03 11:41 ` Kieran Bingham [this message]
2016-03-03 11:41 ` [PATCHv3 13/13] scripts/gdb: Add lx_thread_info_by_pid helper Kieran Bingham
2016-03-13 16:35 ` [PATCHv3 00/13] scripts/gdb: Linux awareness debug commands Jan Kiszka
2016-03-14 14:40 ` Kieran Bingham
2016-03-14 15:09 ` Jan Kiszka
2016-03-14 17:18 ` Kieran Bingham
2016-03-14 17:31 ` Jan Kiszka
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