From: Jeff Hostetler <firstname.lastname@example.org>
To: Junio C Hamano <email@example.com>, Stefan Beller <firstname.lastname@example.org>
Cc: email@example.com, git <firstname.lastname@example.org>,
Jeff Hostetler <email@example.com>
Subject: Re: [PATCH 1/8] trace2: create new combined trace facility
Date: Wed, 5 Sep 2018 11:51:40 -0400 [thread overview]
Message-ID: <firstname.lastname@example.org> (raw)
On 9/4/2018 6:30 PM, Junio C Hamano wrote:
> Stefan Beller <email@example.com> writes:
>>> The API defines both fixed-field and printf-style functions.
>>> The trace2 performance tracing includes thread-specific function
>>> nesting and timings.
>> So this only adds the new API, and we need to merge the TRACE
>> into the TRACE2 later?
> If this is a rhetorical question implying that it would be best if
> the existing trace() were rewritten to be built on top of trace2()
> while building this series, especially before adding new callsites
> that directly use trace2(), I may share that feeling. I haven't
> studied this new round deeply enough to see how realistic it would
> be, though.
I wanted to come up with a unified API that we liked and was
sufficient to handle the default-key, performance-key,
the new event-key (currently supporting JSON output), and any
other formats/variants that we want (protobufs, syslog, etc).
And hopefully get some agreement on it and see what else we want
And then look at converting the trace_printf() and trace_performance()
calls to trace2. Clearly, I could just replace the existing printf
style calls to trace2_printf's, but I thought it would be better to
look at them and promote them to higher-level functions. For example,
the trace_argv_printf() calls are generally used to dump the command
line arguments for the current process or spawned child processes.
I have trace2_start() and trace2_child_start() that captures the
argv and additional information about it. (The "why" if you will.)
So the trace_argv_* forms can go away.
Likewise, all of the trace_performance() and trace_performance_since()
can be converted to trace2_region_enter/_leave calls. And those forms
can be removed from trace.[ch].
The net-net is that trace.[ch] shrinks in a short sequence of commits
on top of my initial trace2 commit in a reroll of this patch series.
(and replacing some of the demonstration commits in V1)
Then I'll address the trace_printf_key() forms, since they write
to alternate stream.
Then I can delete trace.[ch]. And we can consider renaming
trace2_* functions and/or GIT_TR2_* env vars if we want.
I wanted to avoid rewriting trace.[ch] just to delete them later
in the same patch series.
next prev parent reply other threads:[~2018-09-05 15:51 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-31 16:49 [PATCH 0/8] WIP: trace2: a new trace facility Jeff Hostetler via GitGitGadget
2018-08-31 16:49 ` [PATCH 1/8] trace2: create new combined " Jeff Hostetler via GitGitGadget
2018-08-31 17:19 ` Derrick Stolee
2018-09-04 22:12 ` Stefan Beller
2018-09-04 22:30 ` Junio C Hamano
2018-09-05 15:51 ` Jeff Hostetler [this message]
2018-09-05 15:01 ` Jeff Hostetler
2018-08-31 16:49 ` [PATCH 2/8] trace2: add trace2 to main Jeff Hostetler via GitGitGadget
2018-08-31 16:49 ` [PATCH 3/8] trace2: demonstrate trace2 regions in wt-status Jeff Hostetler via GitGitGadget
2018-08-31 16:49 ` [PATCH 4/8] trace2: demonstrate trace2 child process classification Jeff Hostetler via GitGitGadget
2018-08-31 16:50 ` [PATCH 5/8] trace2: demonstrate instrumenting do_read_index Jeff Hostetler via GitGitGadget
2018-08-31 16:50 ` [PATCH 6/8] trace2: demonstrate instrumenting threaded preload_index Jeff Hostetler via GitGitGadget
2018-08-31 16:50 ` [PATCH 7/8] trace2: demonstrate setting sub-command parameter in checkout Jeff Hostetler via GitGitGadget
2018-08-31 16:50 ` [PATCH 8/8] trace2: demonstrate use of regions in read_directory_recursive Jeff Hostetler via GitGitGadget
2018-08-31 17:19 ` [PATCH 0/8] WIP: trace2: a new trace facility Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 0/6] Use trace2 in commit-reach Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 1/6] commit-reach: add trace2 telemetry and walk count Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 2/6] comit-reach: use trace2 for commit_contains_tag_algo Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 3/6] commit-reach: use trace2 in can_all_from_reach Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 4/6] test-tool: start trace2 environment Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 5/6] test-lib: add run_and_check_trace2 Derrick Stolee
2018-09-06 15:13 ` [RFC PATCH 6/6] commit-reach: fix first-parent heuristic Derrick Stolee
2018-10-11 1:50 ` Jonathan Nieder
2018-10-11 11:00 ` Derrick Stolee
2019-01-15 1:05 ` [PATCH 0/8] WIP: trace2: a new trace facility Jonathan Nieder
2019-01-15 17:03 ` Jeff Hostetler
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