Rebuild bcc with LLVM16 and misc fixes
Fixes the following issue: - compactsnoop - killsnoop documentation - funcslower - deadlock memory usage issue - nfsslower Also, use upstream fix for nfsslower unititialized struct issue. Resolves: rhbz#2192952 Resolves: rhbz#2042236 Resolves: rhbz#2075500 Resolves: rhbz#2180934 Resolves: rhbz#2075415 Resolves: rhbz#2050112 Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
This commit is contained in:
Jerome Marchand
parent
e35359999f
commit
d4b938c7f2
@ -0,0 +1,58 @@
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From 64f9c355a62f78000270d025b479b7eeba7349e9 Mon Sep 17 00:00:00 2001
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From: Jerome Marchand <jmarchan@redhat.com>
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Date: Wed, 11 Jan 2023 16:46:32 +0100
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Subject: [PATCH] killsnoop: add missing -s and -T options to the synopsis
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The -s option is missing from the synopsis of the killsnoop manpage,
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example file and the comment on top of the tool itself.
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Also, -T option is missing from the example file.
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Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
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---
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man/man8/killsnoop.8 | 2 +-
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tools/killsnoop.py | 2 +-
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tools/killsnoop_example.txt | 2 +-
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3 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/man/man8/killsnoop.8 b/man/man8/killsnoop.8
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index 3f63d2ee..cb2a975e 100644
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--- a/man/man8/killsnoop.8
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+++ b/man/man8/killsnoop.8
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@@ -2,7 +2,7 @@
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.SH NAME
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killsnoop \- Trace signals issued by the kill() syscall. Uses Linux eBPF/bcc.
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.SH SYNOPSIS
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-.B killsnoop [\-h] [\-x] [-p PID] [-T PID]
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+.B killsnoop [\-h] [\-x] [-p PID] [-T PID] [-s SIGNAL]
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.SH DESCRIPTION
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killsnoop traces the kill() syscall, to show signals sent via this method. This
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may be useful to troubleshoot failing applications, where an unknown mechanism
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diff --git a/tools/killsnoop.py b/tools/killsnoop.py
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index c0166f1d..9cce8dcc 100755
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--- a/tools/killsnoop.py
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+++ b/tools/killsnoop.py
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@@ -4,7 +4,7 @@
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# killsnoop Trace signals issued by the kill() syscall.
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# For Linux, uses BCC, eBPF. Embedded C.
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#
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-# USAGE: killsnoop [-h] [-x] [-p PID] [-T PID]
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+# USAGE: killsnoop [-h] [-x] [-p PID] [-T PID] [-s SIGNAL]
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#
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# Copyright (c) 2015 Brendan Gregg.
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# Licensed under the Apache License, Version 2.0 (the "License")
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diff --git a/tools/killsnoop_example.txt b/tools/killsnoop_example.txt
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index 904fe6ef..97c3ad70 100644
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--- a/tools/killsnoop_example.txt
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+++ b/tools/killsnoop_example.txt
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@@ -19,7 +19,7 @@ The second line showed the same signal sent, this time resulting in a -3
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USAGE message:
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# ./killsnoop -h
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-usage: killsnoop [-h] [-x] [-p PID]
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+usage: killsnoop [-h] [-x] [-p PID] [-T PID] [-s SIGNAL]
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Trace signals issued by the kill() syscall
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--
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2.39.2
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@ -0,0 +1,71 @@
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From cc35f70515cb0f3b8032b8fb68f9f37a844e74c8 Mon Sep 17 00:00:00 2001
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From: Rong Tao <rongtao@cestc.cn>
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Date: Fri, 10 Feb 2023 23:28:55 +0800
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Subject: [PATCH] tools/compactsnoop.py: Fix raw_tracepoint Invalid argument
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error
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kernel commit abd4349ff9b8("mm: compaction: cleanup the compaction trace
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events") change the arguments of 'mm_compaction_begin' from (start_pfn,
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migrate_pfn, free_pfn, end_pfn, sync) to (cc, start_pfn, end_pfn, sync),
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and change the arguments of 'mm_compaction_end' from (start_pfn,
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migrate_pfn, free_pfn, end_pfn, sync, ret) to (cc, start_pfn, end_pfn,
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sync, ret).
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Replacing RAW_TRACEPOINT_PROBE with TRACEPOINT_PROBE solves this problem
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and guarantees compatibility.
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$ sudo ./compactsnoop.py
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bpf_attach_raw_tracepoint (mm_compaction_begin): Invalid argument
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Traceback (most recent call last):
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File "/home/sdb/Git/bcc/tools/./compactsnoop.py", line 292, in <module>
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b = BPF(text=bpf_text)
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^^^^^^^^^^^^^^^^^^
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File "/usr/lib/python3.11/site-packages/bcc/__init__.py", line 483, in __init__
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self._trace_autoload()
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File "/usr/lib/python3.11/site-packages/bcc/__init__.py", line 1462, in _trace_autoload
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self.attach_raw_tracepoint(tp=tp, fn_name=fn.name)
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File "/usr/lib/python3.11/site-packages/bcc/__init__.py", line 1055, in attach_raw_tracepoint
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raise Exception("Failed to attach BPF to raw tracepoint")
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Exception: Failed to attach BPF to raw tracepoint
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Signed-off-by: Rong Tao <rongtao@cestc.cn>
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---
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tools/compactsnoop.py | 13 ++++---------
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1 file changed, 4 insertions(+), 9 deletions(-)
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diff --git a/tools/compactsnoop.py b/tools/compactsnoop.py
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index 2643e8ed..2b395dec 100755
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--- a/tools/compactsnoop.py
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+++ b/tools/compactsnoop.py
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@@ -237,11 +237,9 @@ RAW_TRACEPOINT_PROBE(mm_compaction_suitable)
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return 0;
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}
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-RAW_TRACEPOINT_PROBE(mm_compaction_begin)
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+TRACEPOINT_PROBE(compaction, mm_compaction_begin)
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{
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- // TP_PROTO(unsigned long zone_start, unsigned long migrate_pfn,
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- // unsigned long free_pfn, unsigned long zone_end, bool sync)
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- bool sync = (bool)ctx->args[4];
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+ bool sync = args->sync;
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u64 id = bpf_get_current_pid_tgid();
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struct val_t *valp = start.lookup(&id);
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@@ -255,12 +253,9 @@ RAW_TRACEPOINT_PROBE(mm_compaction_begin)
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return 0;
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}
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-RAW_TRACEPOINT_PROBE(mm_compaction_end)
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+TRACEPOINT_PROBE(compaction, mm_compaction_end)
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{
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- // TP_PROTO(unsigned long zone_start, unsigned long migrate_pfn,
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- // unsigned long free_pfn, unsigned long zone_end, bool sync,
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- // int status)
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- submit_event(ctx, ctx->args[5]);
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+ submit_event(args, args->status);
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return 0;
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}
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"""
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--
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2.39.2
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@ -0,0 +1,76 @@
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From 0e9384ec4c88d2da2d23475f58ec9bff7eb48639 Mon Sep 17 00:00:00 2001
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From: Jerome Marchand <jmarchan@redhat.com>
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Date: Tue, 25 Apr 2023 16:04:05 +0200
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Subject: [PATCH] tools/deadlock: Add an option to set the maximum number of
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stack traces
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Commit 77f5252d ("tools/deadlock: support specifies maxnum of threads
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and edge cases (#3455)") allow to set the maximum number of threads
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and edge cases to be able to reduce the memory usage of the deadlock
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tool. It however let the size of the map of stack traces fixed. It's
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current size, 640k (actually rounded up to 1M) takes 1Gb of vmalloced
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kernel memory.
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This patch adds an option to make the maximum number of stack traces
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user defined. It also set the default value to 64k, in line with the
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current default for the number of edge cases and threads.
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It fix the following issue on system with limited memory ressources:
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could not open bpf map: stack_traces, error: Cannot allocate memory
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Traceback (most recent call last):
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File "/tmp/./deadlock.py", line 577, in <module>
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main()
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File "/tmp/./deadlock.py", line 489, in main
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bpf = BPF(text=text)
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File "/usr/lib/python3.9/site-packages/bcc/__init__.py", line 479, in __init__
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raise Exception("Failed to compile BPF module %s" % (src_file or "<text>"))
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Exception: Failed to compile BPF module <text>
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Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
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---
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tools/deadlock.c | 2 +-
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tools/deadlock.py | 8 ++++++++
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2 files changed, 9 insertions(+), 1 deletion(-)
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diff --git a/tools/deadlock.c b/tools/deadlock.c
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index 006dc121..6ae405ba 100644
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--- a/tools/deadlock.c
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+++ b/tools/deadlock.c
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@@ -60,7 +60,7 @@ struct thread_created_leaf_t {
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BPF_HASH(thread_to_parent, u32, struct thread_created_leaf_t);
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// Stack traces when threads are created and when mutexes are locked/unlocked.
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-BPF_STACK_TRACE(stack_traces, 655360);
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+BPF_STACK_TRACE(stack_traces, MAX_TRACES);
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// The first argument to the user space function we are tracing
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// is a pointer to the mutex M held by thread T.
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diff --git a/tools/deadlock.py b/tools/deadlock.py
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index 12de099f..f7eb4ce0 100755
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--- a/tools/deadlock.py
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+++ b/tools/deadlock.py
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@@ -467,6 +467,13 @@ import time
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help='Specifies the maximum number of edge cases that can be recorded. '
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'default 65536. Note. 88 bytes per edge case.'
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)
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+ parser.add_argument(
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+ '-s', '--stacktraces', type=int, default=65536,
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+ help='Specifies the maximum number of stack traces that can be recorded. '
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+ 'This number is rounded up to the next power of two.'
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+ 'default 65536. Note. 1 kbytes vmalloced per stack trace.'
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+ )
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+
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args = parser.parse_args()
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if not args.binary:
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try:
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@@ -479,6 +486,7 @@ import time
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text = f.read()
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text = text.replace('MAX_THREADS', str(args.threads));
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text = text.replace('MAX_EDGES', str(args.edges));
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+ text = text.replace('MAX_TRACES', str(args.stacktraces));
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bpf = BPF(text=text)
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# Trace where threads are created
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--
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2.39.2
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@ -0,0 +1,57 @@
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From 29f0fa3693d679102680fece9ed5e606e291c5fa Mon Sep 17 00:00:00 2001
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From: Jerome Marchand <jmarchan@redhat.com>
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Date: Fri, 7 Apr 2023 14:30:54 +0200
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Subject: [PATCH] tools/funcslower: fix printing of folded stacks
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When trying to print folded stack, funcslower tries to join bytes to a
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string. Let's perform that operation with bytes only, and decode
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before printing.
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Also, decode symbols name before printing for the default stack
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format, to avoid unsightly b'xxx' output.
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It fixes the following error:
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Exception ignored on calling ctypes callback function: <function PerfEventArray._open_perf_buffer.<locals>.raw_cb_ at 0x7f200541e5e0>
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Traceback (most recent call last):
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File "/usr/lib/python3.9/site-packages/bcc/table.py", line 982, in raw_cb_
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callback(cpu, data, size)
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File "/usr/share/bcc/tools/funcslower", line 340, in print_event
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print_stack(event)
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File "/usr/share/bcc/tools/funcslower", line 324, in print_stack
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print("%s %d" % (";".join(line), 1))
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TypeError: sequence item 1: expected str instance, bytes found
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Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
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---
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tools/funcslower.py | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/tools/funcslower.py b/tools/funcslower.py
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index 6df7f24c..4b3798a0 100755
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--- a/tools/funcslower.py
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+++ b/tools/funcslower.py
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@@ -317,17 +317,17 @@ earliest_ts = 0
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# print folded stack output
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user_stack = list(user_stack)
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kernel_stack = list(kernel_stack)
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- line = [event.comm.decode('utf-8', 'replace')] + \
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+ line = [event.comm] + \
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[b.sym(addr, event.tgid_pid) for addr in reversed(user_stack)] + \
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(do_delimiter and ["-"] or []) + \
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[b.ksym(addr) for addr in reversed(kernel_stack)]
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- print("%s %d" % (";".join(line), 1))
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+ print("%s %d" % (b';'.join(line).decode('utf-8', 'replace'), 1))
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else:
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# print default multi-line stack output.
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for addr in kernel_stack:
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- print(" %s" % b.ksym(addr))
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+ print(" %s" % b.ksym(addr).decode('utf-8', 'replace'))
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for addr in user_stack:
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- print(" %s" % b.sym(addr, event.tgid_pid))
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+ print(" %s" % b.sym(addr, event.tgid_pid).decode('utf-8', 'replace'))
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def print_event(cpu, data, size):
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event = b["events"].event(data)
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--
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2.39.2
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@ -1,64 +0,0 @@
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From acc8800b6f4380b6f4c7f04ee9a1263cf11deb35 Mon Sep 17 00:00:00 2001
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From: Jerome Marchand <jmarchan@redhat.com>
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Date: Tue, 20 Dec 2022 11:33:51 +0100
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Subject: [PATCH] tools: nfsslower: fix an uninitialized struct error
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Fixes the following error:
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bpf: Failed to load program: Permission denied
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reg type unsupported for arg#0 function trace_read_return#22
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0: R1=ctx(off=0,imm=0) R10=fp0
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; int trace_read_return(struct pt_regs *ctx)
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0: (bf) r6 = r1 ; R1=ctx(off=0,imm=0) R6_w=ctx(off=0,imm=0)
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[...]
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; bpf_probe_read_kernel(&data.file, sizeof(data.file), (void *)qs.name);
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75: (b7) r2 = 32 ; R2_w=32
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76: (85) call bpf_probe_read_kernel#113 ; R0_w=scalar() fp-16=????mmmm fp-24=mmmmmmmm fp-32=mmmmmmmm fp-40=mmmmmmmm fp-48=mmmmmmmm
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; bpf_perf_event_output(ctx, (void *)bpf_pseudo_fd(1, -2), CUR_CPU_IDENTIFIER, &data, sizeof(data));
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77: (18) r2 = 0xffff9a0a42177200 ; R2_w=map_ptr(off=0,ks=4,vs=4,imm=0)
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79: (bf) r4 = r10 ; R4_w=fp0 R10=fp0
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; bpf_probe_read_kernel(&data.file, sizeof(data.file), (void *)qs.name);
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80: (07) r4 += -104 ; R4_w=fp-104
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; bpf_perf_event_output(ctx, (void *)bpf_pseudo_fd(1, -2), CUR_CPU_IDENTIFIER, &data, sizeof(data));
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81: (bf) r1 = r6 ; R1_w=ctx(off=0,imm=0) R6=ctx(off=0,imm=0)
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82: (18) r3 = 0xffffffff ; R3_w=4294967295
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84: (b7) r5 = 96 ; R5_w=96
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85: (85) call bpf_perf_event_output#25
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invalid indirect read from stack R4 off -104+92 size 96
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processed 82 insns (limit 1000000) max_states_per_insn 0 total_states 4 peak_states 4 mark_read 3
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Traceback (most recent call last):
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File "/usr/share/bcc/tools/nfsslower", line 283, in <module>
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b.attach_kretprobe(event="nfs_file_read", fn_name="trace_read_return")
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File "/usr/lib/python3.9/site-packages/bcc/__init__.py", line 872, in attach_kretprobe
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fn = self.load_func(fn_name, BPF.KPROBE)
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File "/usr/lib/python3.9/site-packages/bcc/__init__.py", line 523, in load_func
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raise Exception("Failed to load BPF program %s: %s" %
|
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Exception: Failed to load BPF program b'trace_read_return': Permission denied
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---
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tools/nfsslower.py | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/tools/nfsslower.py b/tools/nfsslower.py
|
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index b5df8f19..682a3fb7 100755
|
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--- a/tools/nfsslower.py
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+++ b/tools/nfsslower.py
|
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@@ -179,8 +179,12 @@ static int trace_exit(struct pt_regs *ctx, int type)
|
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|
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// populate output struct
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u32 size = PT_REGS_RC(ctx);
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- struct data_t data = {.type = type, .size = size, .delta_us = delta_us,
|
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- .pid = pid};
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+ struct data_t data;
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+ __builtin_memset(&data, 0, sizeof(data));
|
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+ data.type = type;
|
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+ data.size = size;
|
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+ data.delta_us = delta_us;
|
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+ data.pid = pid;
|
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data.ts_us = ts / 1000;
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data.offset = valp->offset;
|
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bpf_get_current_comm(&data.task, sizeof(data.task));
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--
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2.38.1
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@ -0,0 +1,85 @@
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From 9965f8397950d8aa1bc1a5decbc2250d0627a798 Mon Sep 17 00:00:00 2001
|
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From: Rong Tao <rongtao@cestc.cn>
|
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Date: Fri, 10 Feb 2023 22:16:56 +0800
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Subject: [PATCH] tools/nfsslower.py: Fix uninitialized struct pad error
|
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The verifier is unhappy, if data struct _pad_ is not initialized, see [0][1].
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$ sudo ./nfsslower.py
|
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...
|
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; bpf_perf_event_output(ctx, (void *)bpf_pseudo_fd(1, -2), CUR_CPU_IDENTIFIER, &data, sizeof(data));
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83: (79) r1 = *(u64 *)(r10 -144) ; R1_w=ctx(off=0,imm=0) R10=fp0
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84: (18) r3 = 0xffffffff ; R3_w=4294967295
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86: (b7) r5 = 96 ; R5_w=96
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87: (85) call bpf_perf_event_output#25
|
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invalid indirect read from stack R4 off -136+92 size 96
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processed 84 insns (limit 1000000) max_states_per_insn 0 total_states 4 peak_states 4 mark_read 4
|
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...
|
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raise Exception("Failed to load BPF program %s: %s" %
|
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Exception: Failed to load BPF program b'raw_tracepoint__nfs_commit_done': Permission denied
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[0] https://github.com/iovisor/bcc/issues/2623
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[1] https://github.com/iovisor/bcc/pull/4453
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Signed-off-by: Rong Tao <rongtao@cestc.cn>
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---
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tools/nfsslower.py | 29 +++++++++++++++++++++--------
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1 file changed, 21 insertions(+), 8 deletions(-)
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diff --git a/tools/nfsslower.py b/tools/nfsslower.py
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index 34756f72..99f63f0f 100755
|
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--- a/tools/nfsslower.py
|
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+++ b/tools/nfsslower.py
|
||||
@@ -195,8 +195,11 @@ static int trace_exit(struct pt_regs *ctx, int type)
|
||||
|
||||
// populate output struct
|
||||
u32 size = PT_REGS_RC(ctx);
|
||||
- struct data_t data = {.type = type, .size = size, .delta_us = delta_us,
|
||||
- .pid = pid};
|
||||
+ struct data_t data = {};
|
||||
+ data.type = type;
|
||||
+ data.size = size;
|
||||
+ data.delta_us = delta_us;
|
||||
+ data.pid = pid;
|
||||
data.ts_us = ts / 1000;
|
||||
data.offset = valp->offset;
|
||||
bpf_get_current_comm(&data.task, sizeof(data.task));
|
||||
@@ -280,9 +283,14 @@ RAW_TRACEPOINT_PROBE(nfs_commit_done)
|
||||
u64 ts = bpf_ktime_get_ns();
|
||||
u64 delta_us = (ts - cp->ts) / 1000;
|
||||
u32 pid = bpf_get_current_pid_tgid() >> 32;
|
||||
- struct data_t data = {.type = TRACE_COMMIT, .offset = cp->offset,
|
||||
- .size = cp->count, .ts_us = ts/1000, .delta_us = delta_us,
|
||||
- .pid = pid};
|
||||
+
|
||||
+ struct data_t data = {};
|
||||
+ data.type = TRACE_COMMIT;
|
||||
+ data.offset = cp->offset;
|
||||
+ data.size = cp->count;
|
||||
+ data.ts_us = ts/1000;
|
||||
+ data.delta_us = delta_us;
|
||||
+ data.pid = pid;
|
||||
|
||||
commitinfo.delete(&key);
|
||||
bpf_get_current_comm(&data.task, sizeof(data.task));
|
||||
@@ -325,9 +333,14 @@ int trace_nfs_commit_done(struct pt_regs *ctx, void *task, void *calldata)
|
||||
u64 ts = bpf_ktime_get_ns();
|
||||
u64 delta_us = (ts - cp->ts) / 1000;
|
||||
u32 pid = bpf_get_current_pid_tgid() >> 32;
|
||||
- struct data_t data = {.type = TRACE_COMMIT, .offset = cp->offset,
|
||||
- .size = cp->count, .ts_us = ts/1000, .delta_us = delta_us,
|
||||
- .pid = pid};
|
||||
+
|
||||
+ struct data_t data = {};
|
||||
+ data.type = TRACE_COMMIT;
|
||||
+ data.offset = cp->offset;
|
||||
+ data.size = cp->count;
|
||||
+ data.ts_us = ts/1000;
|
||||
+ data.delta_us = delta_us;
|
||||
+ data.pid = pid;
|
||||
|
||||
commitinfo.delete(&key);
|
||||
bpf_get_current_comm(&data.task, sizeof(data.task));
|
||||
--
|
||||
2.39.2
|
||||
|
||||
17
bcc.spec
17
bcc.spec
@ -25,14 +25,18 @@
|
||||
|
||||
Name: bcc
|
||||
Version: 0.26.0
|
||||
Release: 2%{?dist}
|
||||
Release: 3%{?dist}
|
||||
Summary: BPF Compiler Collection (BCC)
|
||||
License: ASL 2.0
|
||||
URL: https://github.com/iovisor/bcc
|
||||
Source0: %{url}/archive/v%{version}/%{name}-%{version}.tar.gz
|
||||
Patch0: %%{name}-%%{version}-tools-nfsslower-fix-an-uninitialized-struct-error.patch
|
||||
Patch0: %%{name}-%%{version}-tools-nfsslower.py-Fix-uninitialized-struct-pad-erro.patch
|
||||
Patch1: %%{name}-%%{version}-tools-slabratetop-Fix-error-incomplete-definition-of.patch
|
||||
Patch2: %%{name}-%%{version}-tools-readahead-Fix-Failed-to-attach-BPF-program-ent.patch
|
||||
Patch3: %%{name}-%%{version}-tools-compactsnoop.py-Fix-raw_tracepoint-Invalid-arg.patch
|
||||
Patch4: %%{name}-%%{version}-killsnoop-add-missing-s-and-T-options-to-the-synopsi.patch
|
||||
Patch5: %%{name}-%%{version}-tools-funcslower-fix-printing-of-folded-stacks.patch
|
||||
Patch6: %%{name}-%%{version}-tools-deadlock-Add-an-option-to-set-the-maximum-numb.patch
|
||||
|
||||
# Arches will be included as upstream support is added and dependencies are
|
||||
# satisfied in the respective arches
|
||||
@ -256,6 +260,15 @@ cp -a libbpf-tools/tmp-install/bin/* %{buildroot}/%{_sbindir}/
|
||||
%endif
|
||||
|
||||
%changelog
|
||||
* Fri May 12 2023 Jerome Marchand <jmarchan@redhat.com> - 0.26.0-3
|
||||
- Rebuild with LLVM 16 (rhbz#2050112)
|
||||
- Fix compactsnoop (rhbz#2042236)
|
||||
- Fix killsnoop documentation (rhbz#2075500)
|
||||
- Fix funcslower (rhbz#2075415)
|
||||
- Fix deadlock memory usage issue (rhbz#2050112)
|
||||
- Fix nfsslower (rhbz#2180934)
|
||||
- Use upstream fix for nfsslower unititialized struct issue
|
||||
|
||||
* Wed Mar 15 2023 Jerome Marchand <jmarchan@redhat.com> - 0.26.0-2
|
||||
- Rebuild with the right rhel-target
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user