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Date: Thu, 03 Jun 2021 21:19:50 -0700
From: Joe Perches <joe@...ches.com>
To: Steven Rostedt <rostedt@...dmis.org>,
Daniel Bristot de Oliveira <bristot@...hat.com>
Cc: linux-kernel@...r.kernel.org, Phil Auld <pauld@...hat.com>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Kate Carcia <kcarcia@...hat.com>,
Jonathan Corbet <corbet@....net>,
Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
Alexandre Chartre <alexandre.chartre@...cle.com>,
Clark Willaims <williams@...hat.com>,
John Kacur <jkacur@...hat.com>,
Juri Lelli <juri.lelli@...hat.com>, linux-doc@...r.kernel.org
Subject: Re: [PATCH V3 7/9] tracing: Add __print_ns_to_secs() and
__print_ns_without_secs() helpers
On Thu, 2021-06-03 at 17:29 -0400, Steven Rostedt wrote:
> > +++ b/include/trace/trace_events.h
> > @@ -358,6 +358,21 @@ TRACE_MAKE_SYSTEM_STR();
> > trace_print_hex_dump_seq(p, prefix_str, prefix_type, \
> > rowsize, groupsize, buf, len, ascii)
> >
> >
> > +#undef __print_ns_to_secs
> > +#define __print_ns_to_secs(value) \
> > + ({ \
> > + u64 ____val = (u64)value; \
> > + do_div(____val, NSEC_PER_SEC); \
> > + ____val; \
> > + })
>
> I know my name is on this, but we need parenthesis around "value".
If tracing cleanups for trace_events.h are being done, perhaps
another bit of untidiness is the macro definition and uses of
__assign_str.
$ git grep -w -1 __assign_str include/trace/trace_events.h
include/trace/trace_events.h-
include/trace/trace_events.h:#undef __assign_str
include/trace/trace_events.h:#define __assign_str(dst, src) \
include/trace/trace_events.h- strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
Its definition has a semicolon as do most uses but a dozen handfuls of
other uses do not have a semicolon. It'd be more consistent to add a
semicolon to the uses without them and when done treewide, then remove
the semicolon from the macro declaration.
$ git grep -P '\b__assign_str\b' | wc -l
551
$ git grep -P '\b__assign_str\b.*;' | wc -l
480
For instance: sunrpc.h has a mixture of uses with and without semicolons.
$ git grep -P '\b__assign_str\b' include/trace/events/sunrpc.h | wc -l
65
$ git grep -P '\b__assign_str\b.*;' include/trace/events/sunrpc.h | wc -l
38
It's especially odd in the last block below to have 3 successive uses
where the first and last has a semicolon, but the middle one does not.
So perhaps as a start:
---
include/trace/events/sunrpc.h | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index d02e01a27b690..861f199896c6a 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -154,8 +154,8 @@ TRACE_EVENT(rpc_clnt_new,
__entry->client_id = clnt->cl_clid;
__assign_str(addr, xprt->address_strings[RPC_DISPLAY_ADDR]);
__assign_str(port, xprt->address_strings[RPC_DISPLAY_PORT]);
- __assign_str(program, program)
- __assign_str(server, server)
+ __assign_str(program, program);
+ __assign_str(server, server);
),
TP_printk("client=%u peer=[%s]:%s program=%s server=%s",
@@ -180,8 +180,8 @@ TRACE_EVENT(rpc_clnt_new_err,
TP_fast_assign(
__entry->error = error;
- __assign_str(program, program)
- __assign_str(server, server)
+ __assign_str(program, program);
+ __assign_str(server, server);
),
TP_printk("program=%s server=%s error=%d",
@@ -284,8 +284,8 @@ TRACE_EVENT(rpc_request,
__entry->client_id = task->tk_client->cl_clid;
__entry->version = task->tk_client->cl_vers;
__entry->async = RPC_IS_ASYNC(task);
- __assign_str(progname, task->tk_client->cl_program->name)
- __assign_str(procname, rpc_proc_name(task))
+ __assign_str(progname, task->tk_client->cl_program->name);
+ __assign_str(procname, rpc_proc_name(task));
),
TP_printk("task:%u@%u %sv%d %s (%ssync)",
@@ -494,10 +494,10 @@ DECLARE_EVENT_CLASS(rpc_reply_event,
__entry->task_id = task->tk_pid;
__entry->client_id = task->tk_client->cl_clid;
__entry->xid = be32_to_cpu(task->tk_rqstp->rq_xid);
- __assign_str(progname, task->tk_client->cl_program->name)
+ __assign_str(progname, task->tk_client->cl_program->name);
__entry->version = task->tk_client->cl_vers;
- __assign_str(procname, rpc_proc_name(task))
- __assign_str(servername, task->tk_xprt->servername)
+ __assign_str(procname, rpc_proc_name(task));
+ __assign_str(servername, task->tk_xprt->servername);
),
TP_printk("task:%u@%d server=%s xid=0x%08x %sv%d %s",
@@ -622,8 +622,8 @@ TRACE_EVENT(rpc_stats_latency,
__entry->task_id = task->tk_pid;
__entry->xid = be32_to_cpu(task->tk_rqstp->rq_xid);
__entry->version = task->tk_client->cl_vers;
- __assign_str(progname, task->tk_client->cl_program->name)
- __assign_str(procname, rpc_proc_name(task))
+ __assign_str(progname, task->tk_client->cl_program->name);
+ __assign_str(procname, rpc_proc_name(task));
__entry->backlog = ktime_to_us(backlog);
__entry->rtt = ktime_to_us(rtt);
__entry->execute = ktime_to_us(execute);
@@ -669,15 +669,15 @@ TRACE_EVENT(rpc_xdr_overflow,
__entry->task_id = task->tk_pid;
__entry->client_id = task->tk_client->cl_clid;
__assign_str(progname,
- task->tk_client->cl_program->name)
+ task->tk_client->cl_program->name);
__entry->version = task->tk_client->cl_vers;
- __assign_str(procedure, task->tk_msg.rpc_proc->p_name)
+ __assign_str(procedure, task->tk_msg.rpc_proc->p_name);
} else {
__entry->task_id = 0;
__entry->client_id = 0;
- __assign_str(progname, "unknown")
+ __assign_str(progname, "unknown");
__entry->version = 0;
- __assign_str(procedure, "unknown")
+ __assign_str(procedure, "unknown");
}
__entry->requested = requested;
__entry->end = xdr->end;
@@ -735,9 +735,9 @@ TRACE_EVENT(rpc_xdr_alignment,
__entry->task_id = task->tk_pid;
__entry->client_id = task->tk_client->cl_clid;
__assign_str(progname,
- task->tk_client->cl_program->name)
+ task->tk_client->cl_program->name);
__entry->version = task->tk_client->cl_vers;
- __assign_str(procedure, task->tk_msg.rpc_proc->p_name)
+ __assign_str(procedure, task->tk_msg.rpc_proc->p_name);
__entry->offset = offset;
__entry->copied = copied;
@@ -1107,9 +1107,9 @@ TRACE_EVENT(xprt_retransmit,
__entry->xid = be32_to_cpu(rqst->rq_xid);
__entry->ntrans = rqst->rq_ntrans;
__assign_str(progname,
- task->tk_client->cl_program->name)
+ task->tk_client->cl_program->name);
__entry->version = task->tk_client->cl_vers;
- __assign_str(procedure, task->tk_msg.rpc_proc->p_name)
+ __assign_str(procedure, task->tk_msg.rpc_proc->p_name);
),
TP_printk(
@@ -1842,7 +1842,7 @@ TRACE_EVENT(svc_xprt_accept,
TP_fast_assign(
__assign_str(addr, xprt->xpt_remotebuf);
- __assign_str(protocol, xprt->xpt_class->xcl_name)
+ __assign_str(protocol, xprt->xpt_class->xcl_name);
__assign_str(service, service);
),
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