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Commit e7e6f462 authored by Leonard Crestez's avatar Leonard Crestez Committed by Linus Torvalds
Browse files

scripts/gdb: print cached rate in lx-clk-summary

The clk rate is always stored in clk_core but might be out of date and
require calls to update from hardware.

Deal with that case by printing a (c) suffix.

Link: http://lkml.kernel.org/r/1a474318982a5f0125f2360c4161029b17f56bd1.1556881728.git.leonard.crestez@nxp.com


Signed-off-by: default avatarLeonard Crestez <leonard.crestez@nxp.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 66d5c7c6
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+14 −7
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@
import gdb
import sys

from linux import utils, lists
from linux import utils, lists, constants

clk_core_type = utils.CachedType("struct clk_core")

@@ -16,27 +16,34 @@ def clk_core_for_each_child(hlist_head):


class LxClkSummary(gdb.Command):
    """Print Linux kernel log buffer."""
    """Print clk tree summary

Output is a subset of /sys/kernel/debug/clk/clk_summary

No calls are made during printing, instead a (c) if printed after values which
are cached and potentially out of date"""

    def __init__(self):
        super(LxClkSummary, self).__init__("lx-clk-summary", gdb.COMMAND_DATA)

    def show_subtree(self, clk, level):
        gdb.write("%*s%-*s %7d %8d %8d\n" % (
        gdb.write("%*s%-*s %7d %8d %8d %11lu%s\n" % (
                level * 3 + 1, "",
                30 - level * 3,
                clk['name'].string(),
                clk['enable_count'],
                clk['prepare_count'],
                clk['protect_count']))
                clk['protect_count'],
                clk['rate'],
                '(c)' if clk['flags'] & constants.LX_CLK_GET_RATE_NOCACHE else '   '))

        for child in clk_core_for_each_child(clk['children']):
            self.show_subtree(child, level + 1)

    def invoke(self, arg, from_tty):
        gdb.write("                                 enable  prepare  protect               \n")
        gdb.write("   clock                          count    count    count\n")
        gdb.write("---------------------------------------------------------\n")
        gdb.write("   clock                          count    count    count        rate   \n")
        gdb.write("------------------------------------------------------------------------\n")
        for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_root_list")):
            self.show_subtree(clk, 0)
        for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_orphan_list")):
+4 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@
 *
 */

#include <linux/clk-provider.h>
#include <linux/fs.h>
#include <linux/hrtimer.h>
#include <linux/mount.h>
@@ -38,6 +39,9 @@

import gdb

/* linux/clk-provider.h */
LX_GDBPARSED(CLK_GET_RATE_NOCACHE)

/* linux/fs.h */
LX_VALUE(SB_RDONLY)
LX_VALUE(SB_SYNCHRONOUS)