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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Jeff Hostetler via GitGitGadget <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Jeff Hostetler <jeffhost@microsoft.com>
Subject: Re: [PATCH 9/9] trace2: add global counters
Date: Mon, 20 Dec 2021 18:14:28 +0100	[thread overview]
Message-ID: <211220.868rwfur46.gmgdl@evledraar.gmail.com> (raw)
In-Reply-To: <596caede216c44d2a01358229bc1a47248e708b1.1640012469.git.gitgitgadget@gmail.com>


On Mon, Dec 20 2021, Jeff Hostetler via GitGitGadget wrote:

> From: Jeff Hostetler <jeffhost@microsoft.com>
> [...]
> +struct ut_011_data {
> +	int v1, v2;
> +};
> [...]
> +	struct ut_011_data data = { 0, 0 };

Nit: Just "{ 0 }" is OK for zero'd out initialization. No need to keep
extending this for every field.

For things that want to exhaustively list fields for clarity, designated
would be preferred:
o
    { .v1 = 0, .v2 = 0 }

> +	int nr_threads = 0;
> +	int k;
> +	pthread_t *pids = NULL;
> +
> +	if (argc != 3)
> +		die("%s", usage_error);
> +	if (get_i(&data.v1, argv[0]))
> +		die("%s", usage_error);
> +	if (get_i(&data.v2, argv[1]))
> +		die("%s", usage_error);
> +	if (get_i(&nr_threads, argv[2]))
> +		die("%s", usage_error);

A partial nit on existing code, as this just extends the pattern, but
couldn't much of this get_i() etc. just be made redundant by simply
using the parse-options.c API here?  I.e. OPTION_INTEGER and using named
arguments would do the validation or you.

> +# Exercise the global counter in a loop and confirm that we get the
> +# expected sum in an event record.
> +#
> +
> +have_counter_event () {
> +	thread=$1
> +	name=$2
> +	value=$3
> +	file=$4
> +
> +	grep "\"event\":\"counter\".*\"thread\":\"${thread}\".*\"name\":\"${name}\".*\"value\":${value}" $file
> +
> +	return $?
> +}

It looks like there's no helper, but this is the Nth thing I see where
wish our "test_region" helper were just a bit more generalized. I.e.:

    test_trace2 --match=counter --match=thread=$thread --match=name=$name --match=value=$value <trace>

With test_region just being a wrapper for something like:

    test_trace2 --match=region_enter --match=category=$category --match=label=$label <trace> &&
    test_trace2 --match=region_leave --match=category=$category --match=label=$label <trace>

> +static void tr2main_emit_summary_counters(uint64_t us_elapsed_absolute)
> +{
> +	struct tr2_tgt *tgt_j;
> +	int j;
> +	struct tr2ctr_block merged;
> +
> +	memset(&merged, 0, sizeof(merged));

nit: more memset v.s. "{ 0 }".

  reply	other threads:[~2021-12-20 17:24 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-20 15:01 [PATCH 0/9] Trace2 stopwatch timers and global counters Jeff Hostetler via GitGitGadget
2021-12-20 15:01 ` [PATCH 1/9] trace2: use size_t alloc,nr_open_regions in tr2tls_thread_ctx Jeff Hostetler via GitGitGadget
2021-12-20 15:01 ` [PATCH 2/9] trace2: convert tr2tls_thread_ctx.thread_name from strbuf to char* Jeff Hostetler via GitGitGadget
2021-12-20 16:31   ` Ævar Arnfjörð Bjarmason
2021-12-20 19:07     ` Jeff Hostetler
2021-12-20 19:35       ` Ævar Arnfjörð Bjarmason
2021-12-22 16:32         ` Jeff Hostetler
2021-12-21  7:33     ` Junio C Hamano
2021-12-21  7:22   ` Junio C Hamano
2021-12-22 16:28     ` Jeff Hostetler
2021-12-22 19:57       ` Junio C Hamano
2021-12-20 15:01 ` [PATCH 3/9] trace2: defer free of TLS CTX until program exit Jeff Hostetler via GitGitGadget
2021-12-21  7:30   ` Junio C Hamano
2021-12-22 21:59     ` Jeff Hostetler
2021-12-22 22:56       ` Junio C Hamano
2021-12-22 23:04         ` Jeff Hostetler
2021-12-23  7:38         ` Johannes Sixt
2021-12-23 18:18           ` Junio C Hamano
2021-12-27 18:51             ` Jeff Hostetler
2021-12-20 15:01 ` [PATCH 4/9] trace2: add thread-name override to event target Jeff Hostetler via GitGitGadget
2021-12-20 15:01 ` [PATCH 5/9] trace2: add thread-name override to perf target Jeff Hostetler via GitGitGadget
2021-12-20 15:01 ` [PATCH 6/9] trace2: add timer events to perf and event target formats Jeff Hostetler via GitGitGadget
2021-12-20 16:39   ` Ævar Arnfjörð Bjarmason
2021-12-20 19:44     ` Jeff Hostetler
2021-12-21 14:20   ` Derrick Stolee
2021-12-20 15:01 ` [PATCH 7/9] trace2: add stopwatch timers Jeff Hostetler via GitGitGadget
2021-12-20 16:42   ` Ævar Arnfjörð Bjarmason
2021-12-22 21:38     ` Jeff Hostetler
2021-12-21 14:45   ` Derrick Stolee
2021-12-22 21:57     ` Jeff Hostetler
2021-12-20 15:01 ` [PATCH 8/9] trace2: add counter events to perf and event target formats Jeff Hostetler via GitGitGadget
2021-12-20 16:51   ` Ævar Arnfjörð Bjarmason
2021-12-22 22:56     ` Jeff Hostetler
2021-12-20 15:01 ` [PATCH 9/9] trace2: add global counters Jeff Hostetler via GitGitGadget
2021-12-20 17:14   ` Ævar Arnfjörð Bjarmason [this message]
2021-12-22 22:18     ` Jeff Hostetler
2021-12-21 14:51 ` [PATCH 0/9] Trace2 stopwatch timers and " Derrick Stolee
2021-12-21 23:27   ` Matheus Tavares
2021-12-28 19:36 ` [PATCH v2 " Jeff Hostetler via GitGitGadget
2021-12-28 19:36   ` [PATCH v2 1/9] trace2: use size_t alloc,nr_open_regions in tr2tls_thread_ctx Jeff Hostetler via GitGitGadget
2021-12-29  0:48     ` Ævar Arnfjörð Bjarmason
2021-12-28 19:36   ` [PATCH v2 2/9] trace2: convert tr2tls_thread_ctx.thread_name from strbuf to flex array Jeff Hostetler via GitGitGadget
2021-12-29  1:11     ` Ævar Arnfjörð Bjarmason
2021-12-29 16:46       ` Jeff Hostetler
2021-12-28 19:36   ` [PATCH v2 3/9] trace2: defer free of thread local storage until program exit Jeff Hostetler via GitGitGadget
2021-12-28 19:36   ` [PATCH v2 4/9] trace2: add thread-name override to event target Jeff Hostetler via GitGitGadget
2021-12-28 19:36   ` [PATCH v2 5/9] trace2: add thread-name override to perf target Jeff Hostetler via GitGitGadget
2021-12-29  1:48     ` Ævar Arnfjörð Bjarmason
2021-12-29 17:15       ` Jeff Hostetler
2021-12-28 19:36   ` [PATCH v2 6/9] trace2: add timer events to perf and event target formats Jeff Hostetler via GitGitGadget
2021-12-28 19:36   ` [PATCH v2 7/9] trace2: add stopwatch timers Jeff Hostetler via GitGitGadget
2021-12-28 19:36   ` [PATCH v2 8/9] trace2: add counter events to perf and event target formats Jeff Hostetler via GitGitGadget
2021-12-28 19:36   ` [PATCH v2 9/9] trace2: add global counters Jeff Hostetler via GitGitGadget
2021-12-29  1:54   ` [PATCH v2 0/9] Trace2 stopwatch timers and " Ævar Arnfjörð Bjarmason
2021-12-30 16:42     ` Jeff Hostetler

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