Re: [PATCH v1 2/6] perf mutex: Update use of pthread mutex/cond

From: Ian Rogers
Date: Wed Aug 17 2022 - 16:42:57 EST

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On Wed, Aug 17, 2022 at 11:49 AM Arnaldo Carvalho de Melo
<acme@xxxxxxxxxx> wrote:
>
> Em Wed, Aug 17, 2022 at 06:16:31AM -0700, Ian Rogers escreveu:
> > On Wed, Aug 17, 2022 at 4:54 AM Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote:
> > > > +++ b/tools/perf/tests/perf-record.c
> > > > @@ -2,8 +2,6 @@
> > > > #include <errno.h>
> > > > #include <inttypes.h>
> > > > #include <linux/string.h>
> > > > -/* For the CLR_() macros */
> > > > -#include <pthread.h>
>
> > > why are removing these headers when the CLR_() macros are still in use
> > > in this (and other) files?
>
> > If a file isn't using any pthread_ functions:
>
> > $ grep pthread tools/perf/tests/perf-record.c|wc -l
> > 0
>
> > and only using mutex_ functions. I was trying to remove unnecessary
> > header file #includes.
>
> > The comment says the #include is necessary for CLR_ macros:
> >
> > $ grep CLR_ tools/perf/tests/perf-record.c|wc -l
> > 0
>
> oops, one _ too many :-\
>
> > There is a however a CPU_CLR macro used. CPU_CLR is defined in sched.h
>
> Indeed the comment is wrong, it was about CPU_CLR() indeed:
>
> ⬢[acme@toolbox perf]$ git blame tools/perf/tests/perf-record.c | grep CLR
> 1fbe7df819d9958f1 (Arnaldo Carvalho de Melo 2016-07-06 12:19:19 -0300 5) /* For the CLR_() macros */
> 16d00fee703866c61 (Jiri Olsa 2012-11-10 01:46:45 +0100 37) CPU_CLR(i, maskp);
> ⬢[acme@toolbox perf]$ git show 1fbe7df819d9958f139b87014a2f0d5b34da76d5 | head -5
> commit 1fbe7df819d9958f139b87014a2f0d5b34da76d5
> Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Date: Wed Jul 6 12:19:19 2016 -0300
>
> perf tests: Add missing pthread.h include for CPU_*() macros
> ⬢[acme@toolbox perf]$
>
> > which is #included immediately below. In any case this is unlikely to
> > break anything as there is always the transitive #include of
> > <pthread.h> via "mutex.h".
>
> We try not to get definitions for what is used in a .c file indirectly
> from what some .h file we include includes, for some reason at some
> point that indirection may be cleaned up.

Yep, a principle called include what you use (IWYU). This isn't a
violation here.

> > > These whould be best done in a separate patch with an explanation as to
> > > why it is not needed, is it being obtained from some other header that
> > > is more appropriate than pthread.h? etc.
> >
> > The old code used pthread_mutex_lock and so needs pthread.h, the new
> > code uses mutex_lock and so doesn't.
>
> It still uses things that are defined, somewhere, in pthread.h, as
> documented, if not in the buggy comment, in the 'git blame' reachable
> commit log message, which, unfortunately is incomplete, I should've have
> recorded where (what distro-version/libc-version) this oddity takes place.
>
> I think it was musl libc... lemme dig it...
>
> But then, the less a patch touches, the better, so these cleanups could
> be left for a separate analysis, where this current discussion would
> help clarify things and the "meat" of the patch would have already been
> processed.

So if you are removing uses of a function that a header file declares
it seems to make sense that you should at the same time remove the
#include rather than have 2 patches, one two remove the use and one to
remove the #include. I did the due diligence wrt CPU_CLR and that is
provided by sched.h. I suspect the underlying bug no longer exists. It
seems more IWYU to have 1 patch, so I think even with fewer patches
this part of the patch is correct.

> Patch granularity is important, for bisection and for reviewing, the
> smaller the patch, the less likely it will cause problems and also
> delay reviewing.
>
> Sometimes it isn't possible to make it simpler, smaller, I don't think
> this is one of those times.

Sure, as mentioned it was done this way to maintain the author's tag.
I'm not sure if the author is going to correct this.

> > > In general we prefer more granular patches, so that we help in bisecting
> > > problems, so please break this patch into multiple pieces, say one for
> > > the 'perf bench' codebase, other for 'perf test', etc.
> >
> > Agreed. I was trying to maintain Pavithra's authorship where their
> > change was monolithic. Here are the stats:
>
> And that is commendable, but at the same time she entered this process
> to try and learn how to submit patches to the Linux kernel and projects
> that try to follow its practices, so this discussion is interesting in
> that sense.

Right, so I guess it is on me to cut this up *sigh*.

Thanks,
Ian

> - Arnaldo
>
> > $ git show 1694c66ea8d3720ec8a55ca3ac10ace61e319644|diffstat
> > bench/epoll-ctl.c | 33 ++++++++++++-------------
> > bench/epoll-wait.c | 33 ++++++++++++-------------
> > bench/futex-hash.c | 33 ++++++++++++-------------
> > bench/futex-lock-pi.c | 33 ++++++++++++-------------
> > bench/futex-requeue.c | 33 ++++++++++++-------------
> > bench/futex-wake-parallel.c | 33 ++++++++++++-------------
> > bench/futex-wake.c | 33 ++++++++++++-------------
> > bench/numa.c | 93
> > +++++++++++++++++++++++++----------------------------------------------
> > builtin-lock.c | 1
> > builtin-record.c | 13 ++++++---
> > builtin-sched.c | 67
> > ++++++++++++++++++++++++---------------------------
> > builtin-top.c | 40 +++++++++++++++---------------
> > tests/mmap-basic.c | 2 -
> > tests/openat-syscall-all-cpus.c | 2 -
> > tests/perf-record.c | 2 -
> > ui/browser.c | 20 +++++++--------
> > ui/browsers/annotate.c | 12 ++++-----
> > ui/setup.c | 5 ++-
> > ui/tui/helpline.c | 5 +--
> > ui/tui/progress.c | 8 +++---
> > ui/tui/setup.c | 8 +++---
> > ui/tui/util.c | 18 ++++++-------
> > ui/ui.h | 4 +--
> > util/annotate.c | 13 ++++-----
> > util/annotate.h | 4 +--
> > util/bpf-event.h | 1
> > util/dso.c | 12 ++++-----
> > util/dso.h | 4 +--
> > util/hist.c | 6 ++--
> > util/hist.h | 4 +--
> > util/mmap.h | 1
> > util/symbol.c | 4 +--
> > util/top.h | 5 ++-
> > 33 files changed, 281 insertions(+), 304 deletions(-)
> >
> > Some locks like dso->lock are used in a lot of places so untangling
> > this would be easiest as a rewrite. I was trying to avoid the rewrite
> > to give Pavithra the author's tag.
> >
> > Thanks,
> > Ian
> >
> > > - Arnaldo
> > >
> > > >
> > > > #include <sched.h>
> > > > #include <perf/mmap.h>
> > > > diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
> > > > index fa5bd5c20e96..78fb01d6ad63 100644
> > > > --- a/tools/perf/ui/browser.c
> > > > +++ b/tools/perf/ui/browser.c
> > > > @@ -268,9 +268,9 @@ void __ui_browser__show_title(struct ui_browser *browser, const char *title)
> > > >
> > > > void ui_browser__show_title(struct ui_browser *browser, const char *title)
> > > > {
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > __ui_browser__show_title(browser, title);
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > >
> > > > int ui_browser__show(struct ui_browser *browser, const char *title,
> > > > @@ -284,7 +284,7 @@ int ui_browser__show(struct ui_browser *browser, const char *title,
> > > >
> > > > browser->refresh_dimensions(browser);
> > > >
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > __ui_browser__show_title(browser, title);
> > > >
> > > > browser->title = title;
> > > > @@ -295,16 +295,16 @@ int ui_browser__show(struct ui_browser *browser, const char *title,
> > > > va_end(ap);
> > > > if (err > 0)
> > > > ui_helpline__push(browser->helpline);
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > return err ? 0 : -1;
> > > > }
> > > >
> > > > void ui_browser__hide(struct ui_browser *browser)
> > > > {
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > ui_helpline__pop();
> > > > zfree(&browser->helpline);
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > >
> > > > static void ui_browser__scrollbar_set(struct ui_browser *browser)
> > > > @@ -352,9 +352,9 @@ static int __ui_browser__refresh(struct ui_browser *browser)
> > > >
> > > > int ui_browser__refresh(struct ui_browser *browser)
> > > > {
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > __ui_browser__refresh(browser);
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > >
> > > > return 0;
> > > > }
> > > > @@ -390,10 +390,10 @@ int ui_browser__run(struct ui_browser *browser, int delay_secs)
> > > > while (1) {
> > > > off_t offset;
> > > >
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > err = __ui_browser__refresh(browser);
> > > > SLsmg_refresh();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > if (err < 0)
> > > > break;
> > > >
> > > > diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
> > > > index 44ba900828f6..9bc1076374ff 100644
> > > > --- a/tools/perf/ui/browsers/annotate.c
> > > > +++ b/tools/perf/ui/browsers/annotate.c
> > > > @@ -8,11 +8,11 @@
> > > > #include "../../util/hist.h"
> > > > #include "../../util/sort.h"
> > > > #include "../../util/map.h"
> > > > +#include "../../util/mutex.h"
> > > > #include "../../util/symbol.h"
> > > > #include "../../util/evsel.h"
> > > > #include "../../util/evlist.h"
> > > > #include <inttypes.h>
> > > > -#include <pthread.h>
> > > > #include <linux/kernel.h>
> > > > #include <linux/string.h>
> > > > #include <linux/zalloc.h>
> > > > @@ -319,7 +319,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
> > > >
> > > > browser->entries = RB_ROOT;
> > > >
> > > > - pthread_mutex_lock(&notes->lock);
> > > > + mutex_lock(&notes->lock);
> > > >
> > > > symbol__calc_percent(sym, evsel);
> > > >
> > > > @@ -348,7 +348,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
> > > > }
> > > > disasm_rb_tree__insert(browser, &pos->al);
> > > > }
> > > > - pthread_mutex_unlock(&notes->lock);
> > > > + mutex_unlock(&notes->lock);
> > > >
> > > > browser->curr_hot = rb_last(&browser->entries);
> > > > }
> > > > @@ -474,10 +474,10 @@ static bool annotate_browser__callq(struct annotate_browser *browser,
> > > > }
> > > >
> > > > notes = symbol__annotation(dl->ops.target.sym);
> > > > - pthread_mutex_lock(&notes->lock);
> > > > + mutex_lock(&notes->lock);
> > > >
> > > > if (!symbol__hists(dl->ops.target.sym, evsel->evlist->core.nr_entries)) {
> > > > - pthread_mutex_unlock(&notes->lock);
> > > > + mutex_unlock(&notes->lock);
> > > > ui__warning("Not enough memory for annotating '%s' symbol!\n",
> > > > dl->ops.target.sym->name);
> > > > return true;
> > > > @@ -486,7 +486,7 @@ static bool annotate_browser__callq(struct annotate_browser *browser,
> > > > target_ms.maps = ms->maps;
> > > > target_ms.map = ms->map;
> > > > target_ms.sym = dl->ops.target.sym;
> > > > - pthread_mutex_unlock(&notes->lock);
> > > > + mutex_unlock(&notes->lock);
> > > > symbol__tui_annotate(&target_ms, evsel, hbt, browser->opts);
> > > > sym_title(ms->sym, ms->map, title, sizeof(title), browser->opts->percent_type);
> > > > ui_browser__show_title(&browser->b, title);
> > > > diff --git a/tools/perf/ui/setup.c b/tools/perf/ui/setup.c
> > > > index 700335cde618..fd10dc6baf07 100644
> > > > --- a/tools/perf/ui/setup.c
> > > > +++ b/tools/perf/ui/setup.c
> > > > @@ -1,5 +1,4 @@
> > > > // SPDX-License-Identifier: GPL-2.0
> > > > -#include <pthread.h>
> > > > #include <dlfcn.h>
> > > > #include <unistd.h>
> > > >
> > > > @@ -8,7 +7,7 @@
> > > > #include "../util/hist.h"
> > > > #include "ui.h"
> > > >
> > > > -pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
> > > > +struct mutex ui__lock;
> > > > void *perf_gtk_handle;
> > > > int use_browser = -1;
> > > >
> > > > @@ -76,6 +75,7 @@ int stdio__config_color(const struct option *opt __maybe_unused,
> > > >
> > > > void setup_browser(bool fallback_to_pager)
> > > > {
> > > > + mutex_init(&ui__lock, /*pshared=*/false);
> > > > if (use_browser < 2 && (!isatty(1) || dump_trace))
> > > > use_browser = 0;
> > > >
> > > > @@ -118,4 +118,5 @@ void exit_browser(bool wait_for_ok)
> > > > default:
> > > > break;
> > > > }
> > > > + mutex_destroy(&ui__lock);
> > > > }
> > > > diff --git a/tools/perf/ui/tui/helpline.c b/tools/perf/ui/tui/helpline.c
> > > > index 298d6af82fdd..db4952f5990b 100644
> > > > --- a/tools/perf/ui/tui/helpline.c
> > > > +++ b/tools/perf/ui/tui/helpline.c
> > > > @@ -2,7 +2,6 @@
> > > > #include <stdio.h>
> > > > #include <stdlib.h>
> > > > #include <string.h>
> > > > -#include <pthread.h>
> > > > #include <linux/kernel.h>
> > > > #include <linux/string.h>
> > > >
> > > > @@ -33,7 +32,7 @@ static int tui_helpline__show(const char *format, va_list ap)
> > > > int ret;
> > > > static int backlog;
> > > >
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > ret = vscnprintf(ui_helpline__last_msg + backlog,
> > > > sizeof(ui_helpline__last_msg) - backlog, format, ap);
> > > > backlog += ret;
> > > > @@ -45,7 +44,7 @@ static int tui_helpline__show(const char *format, va_list ap)
> > > > SLsmg_refresh();
> > > > backlog = 0;
> > > > }
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > >
> > > > return ret;
> > > > }
> > > > diff --git a/tools/perf/ui/tui/progress.c b/tools/perf/ui/tui/progress.c
> > > > index 3d74af5a7ece..71b6c8d9474f 100644
> > > > --- a/tools/perf/ui/tui/progress.c
> > > > +++ b/tools/perf/ui/tui/progress.c
> > > > @@ -45,7 +45,7 @@ static void tui_progress__update(struct ui_progress *p)
> > > > }
> > > >
> > > > ui__refresh_dimensions(false);
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > y = SLtt_Screen_Rows / 2 - 2;
> > > > SLsmg_set_color(0);
> > > > SLsmg_draw_box(y, 0, 3, SLtt_Screen_Cols);
> > > > @@ -56,7 +56,7 @@ static void tui_progress__update(struct ui_progress *p)
> > > > bar = ((SLtt_Screen_Cols - 2) * p->curr) / p->total;
> > > > SLsmg_fill_region(y, 1, 1, bar, ' ');
> > > > SLsmg_refresh();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > >
> > > > static void tui_progress__finish(void)
> > > > @@ -67,12 +67,12 @@ static void tui_progress__finish(void)
> > > > return;
> > > >
> > > > ui__refresh_dimensions(false);
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > y = SLtt_Screen_Rows / 2 - 2;
> > > > SLsmg_set_color(0);
> > > > SLsmg_fill_region(y, 0, 3, SLtt_Screen_Cols, ' ');
> > > > SLsmg_refresh();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > >
> > > > static struct ui_progress_ops tui_progress__ops = {
> > > > diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
> > > > index b1be59b4e2a4..a3b8c397c24d 100644
> > > > --- a/tools/perf/ui/tui/setup.c
> > > > +++ b/tools/perf/ui/tui/setup.c
> > > > @@ -29,10 +29,10 @@ void ui__refresh_dimensions(bool force)
> > > > {
> > > > if (force || ui__need_resize) {
> > > > ui__need_resize = 0;
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > SLtt_get_screen_size();
> > > > SLsmg_reinit_smg();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > > }
> > > >
> > > > @@ -170,10 +170,10 @@ void ui__exit(bool wait_for_ok)
> > > > "Press any key...", 0);
> > > >
> > > > SLtt_set_cursor_visibility(1);
> > > > - if (!pthread_mutex_trylock(&ui__lock)) {
> > > > + if (mutex_trylock(&ui__lock)) {
> > > > SLsmg_refresh();
> > > > SLsmg_reset_smg();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > > SLang_reset_tty();
> > > > perf_error__unregister(&perf_tui_eops);
> > > > diff --git a/tools/perf/ui/tui/util.c b/tools/perf/ui/tui/util.c
> > > > index 0f562e2cb1e8..3c5174854ac8 100644
> > > > --- a/tools/perf/ui/tui/util.c
> > > > +++ b/tools/perf/ui/tui/util.c
> > > > @@ -95,7 +95,7 @@ int ui_browser__input_window(const char *title, const char *text, char *input,
> > > > t = sep + 1;
> > > > }
> > > >
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > >
> > > > max_len += 2;
> > > > nr_lines += 8;
> > > > @@ -125,17 +125,17 @@ int ui_browser__input_window(const char *title, const char *text, char *input,
> > > > SLsmg_write_nstring((char *)exit_msg, max_len);
> > > > SLsmg_refresh();
> > > >
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > >
> > > > x += 2;
> > > > len = 0;
> > > > key = ui__getch(delay_secs);
> > > > while (key != K_TIMER && key != K_ENTER && key != K_ESC) {
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > >
> > > > if (key == K_BKSPC) {
> > > > if (len == 0) {
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > goto next_key;
> > > > }
> > > > SLsmg_gotorc(y, x + --len);
> > > > @@ -147,7 +147,7 @@ int ui_browser__input_window(const char *title, const char *text, char *input,
> > > > }
> > > > SLsmg_refresh();
> > > >
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > >
> > > > /* XXX more graceful overflow handling needed */
> > > > if (len == sizeof(buf) - 1) {
> > > > @@ -215,19 +215,19 @@ void __ui__info_window(const char *title, const char *text, const char *exit_msg
> > > >
> > > > void ui__info_window(const char *title, const char *text)
> > > > {
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > __ui__info_window(title, text, NULL);
> > > > SLsmg_refresh();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > }
> > > >
> > > > int ui__question_window(const char *title, const char *text,
> > > > const char *exit_msg, int delay_secs)
> > > > {
> > > > - pthread_mutex_lock(&ui__lock);
> > > > + mutex_lock(&ui__lock);
> > > > __ui__info_window(title, text, exit_msg);
> > > > SLsmg_refresh();
> > > > - pthread_mutex_unlock(&ui__lock);
> > > > + mutex_unlock(&ui__lock);
> > > > return ui__getch(delay_secs);
> > > > }
> > > >
> > > > diff --git a/tools/perf/ui/ui.h b/tools/perf/ui/ui.h
> > > > index 9b6fdf06e1d2..99f8d2fe9bc5 100644
> > > > --- a/tools/perf/ui/ui.h
> > > > +++ b/tools/perf/ui/ui.h
> > > > @@ -2,11 +2,11 @@
> > > > #ifndef _PERF_UI_H_
> > > > #define _PERF_UI_H_ 1
> > > >
> > > > -#include <pthread.h>
> > > > +#include "../util/mutex.h"
> > > > #include <stdbool.h>
> > > > #include <linux/compiler.h>
> > > >
> > > > -extern pthread_mutex_t ui__lock;
> > > > +extern struct mutex ui__lock;
> > > > extern void *perf_gtk_handle;
> > > >
> > > > extern int use_browser;
> > > > diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> > > > index 2c6a485c3de5..29d804d76145 100644
> > > > --- a/tools/perf/util/annotate.c
> > > > +++ b/tools/perf/util/annotate.c
> > > > @@ -35,7 +35,6 @@
> > > > #include "arch/common.h"
> > > > #include "namespaces.h"
> > > > #include <regex.h>
> > > > -#include <pthread.h>
> > > > #include <linux/bitops.h>
> > > > #include <linux/kernel.h>
> > > > #include <linux/string.h>
> > > > @@ -821,7 +820,7 @@ void symbol__annotate_zero_histograms(struct symbol *sym)
> > > > {
> > > > struct annotation *notes = symbol__annotation(sym);
> > > >
> > > > - pthread_mutex_lock(&notes->lock);
> > > > + mutex_lock(&notes->lock);
> > > > if (notes->src != NULL) {
> > > > memset(notes->src->histograms, 0,
> > > > notes->src->nr_histograms * notes->src->sizeof_sym_hist);
> > > > @@ -829,7 +828,7 @@ void symbol__annotate_zero_histograms(struct symbol *sym)
> > > > memset(notes->src->cycles_hist, 0,
> > > > symbol__size(sym) * sizeof(struct cyc_hist));
> > > > }
> > > > - pthread_mutex_unlock(&notes->lock);
> > > > + mutex_unlock(&notes->lock);
> > > > }
> > > >
> > > > static int __symbol__account_cycles(struct cyc_hist *ch,
> > > > @@ -1086,7 +1085,7 @@ void annotation__compute_ipc(struct annotation *notes, size_t size)
> > > > notes->hit_insn = 0;
> > > > notes->cover_insn = 0;
> > > >
> > > > - pthread_mutex_lock(&notes->lock);
> > > > + mutex_lock(&notes->lock);
> > > > for (offset = size - 1; offset >= 0; --offset) {
> > > > struct cyc_hist *ch;
> > > >
> > > > @@ -1105,7 +1104,7 @@ void annotation__compute_ipc(struct annotation *notes, size_t size)
> > > > notes->have_cycles = true;
> > > > }
> > > > }
> > > > - pthread_mutex_unlock(&notes->lock);
> > > > + mutex_unlock(&notes->lock);
> > > > }
> > > >
> > > > int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, struct perf_sample *sample,
> > > > @@ -1258,13 +1257,13 @@ int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool r
> > > >
> > > > void annotation__init(struct annotation *notes)
> > > > {
> > > > - pthread_mutex_init(&notes->lock, NULL);
> > > > + mutex_init(&notes->lock, /*pshared=*/false);
> > > > }
> > > >
> > > > void annotation__exit(struct annotation *notes)
> > > > {
> > > > annotated_source__delete(notes->src);
> > > > - pthread_mutex_destroy(&notes->lock);
> > > > + mutex_destroy(&notes->lock);
> > > > }
> > > >
> > > > static void annotation_line__add(struct annotation_line *al, struct list_head *head)
> > > > diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
> > > > index 986f2bbe4870..3cbd883e4d7a 100644
> > > > --- a/tools/perf/util/annotate.h
> > > > +++ b/tools/perf/util/annotate.h
> > > > @@ -8,9 +8,9 @@
> > > > #include <linux/types.h>
> > > > #include <linux/list.h>
> > > > #include <linux/rbtree.h>
> > > > -#include <pthread.h>
> > > > #include <asm/bug.h>
> > > > #include "symbol_conf.h"
> > > > +#include "mutex.h"
> > > > #include "spark.h"
> > > >
> > > > struct hist_browser_timer;
> > > > @@ -273,7 +273,7 @@ struct annotated_source {
> > > > };
> > > >
> > > > struct annotation {
> > > > - pthread_mutex_t lock;
> > > > + struct mutex lock;
> > > > u64 max_coverage;
> > > > u64 start;
> > > > u64 hit_cycles;
> > > > diff --git a/tools/perf/util/bpf-event.h b/tools/perf/util/bpf-event.h
> > > > index 144a8a24cc69..1bcbd4fb6c66 100644
> > > > --- a/tools/perf/util/bpf-event.h
> > > > +++ b/tools/perf/util/bpf-event.h
> > > > @@ -4,7 +4,6 @@
> > > >
> > > > #include <linux/compiler.h>
> > > > #include <linux/rbtree.h>
> > > > -#include <pthread.h>
> > > > #include <api/fd/array.h>
> > > > #include <stdio.h>
> > > >
> > > > diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
> > > > index 5ac13958d1bd..c7a5b42d1311 100644
> > > > --- a/tools/perf/util/dso.c
> > > > +++ b/tools/perf/util/dso.c
> > > > @@ -795,7 +795,7 @@ dso_cache__free(struct dso *dso)
> > > > struct rb_root *root = &dso->data.cache;
> > > > struct rb_node *next = rb_first(root);
> > > >
> > > > - pthread_mutex_lock(&dso->lock);
> > > > + mutex_lock(&dso->lock);
> > > > while (next) {
> > > > struct dso_cache *cache;
> > > >
> > > > @@ -804,7 +804,7 @@ dso_cache__free(struct dso *dso)
> > > > rb_erase(&cache->rb_node, root);
> > > > free(cache);
> > > > }
> > > > - pthread_mutex_unlock(&dso->lock);
> > > > + mutex_unlock(&dso->lock);
> > > > }
> > > >
> > > > static struct dso_cache *__dso_cache__find(struct dso *dso, u64 offset)
> > > > @@ -841,7 +841,7 @@ dso_cache__insert(struct dso *dso, struct dso_cache *new)
> > > > struct dso_cache *cache;
> > > > u64 offset = new->offset;
> > > >
> > > > - pthread_mutex_lock(&dso->lock);
> > > > + mutex_lock(&dso->lock);
> > > > while (*p != NULL) {
> > > > u64 end;
> > > >
> > > > @@ -862,7 +862,7 @@ dso_cache__insert(struct dso *dso, struct dso_cache *new)
> > > >
> > > > cache = NULL;
> > > > out:
> > > > - pthread_mutex_unlock(&dso->lock);
> > > > + mutex_unlock(&dso->lock);
> > > > return cache;
> > > > }
> > > >
> > > > @@ -1297,7 +1297,7 @@ struct dso *dso__new_id(const char *name, struct dso_id *id)
> > > > dso->root = NULL;
> > > > INIT_LIST_HEAD(&dso->node);
> > > > INIT_LIST_HEAD(&dso->data.open_entry);
> > > > - pthread_mutex_init(&dso->lock, NULL);
> > > > + mutex_init(&dso->lock, /*pshared=*/false);
> > > > refcount_set(&dso->refcnt, 1);
> > > > }
> > > >
> > > > @@ -1336,7 +1336,7 @@ void dso__delete(struct dso *dso)
> > > > dso__free_a2l(dso);
> > > > zfree(&dso->symsrc_filename);
> > > > nsinfo__zput(dso->nsinfo);
> > > > - pthread_mutex_destroy(&dso->lock);
> > > > + mutex_destroy(&dso->lock);
> > > > free(dso);
> > > > }
> > > >
> > > > diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
> > > > index 66981c7a9a18..58d94175e714 100644
> > > > --- a/tools/perf/util/dso.h
> > > > +++ b/tools/perf/util/dso.h
> > > > @@ -2,7 +2,6 @@
> > > > #ifndef __PERF_DSO
> > > > #define __PERF_DSO
> > > >
> > > > -#include <pthread.h>
> > > > #include <linux/refcount.h>
> > > > #include <linux/types.h>
> > > > #include <linux/rbtree.h>
> > > > @@ -11,6 +10,7 @@
> > > > #include <stdio.h>
> > > > #include <linux/bitops.h>
> > > > #include "build-id.h"
> > > > +#include "mutex.h"
> > > >
> > > > struct machine;
> > > > struct map;
> > > > @@ -145,7 +145,7 @@ struct dso_cache {
> > > > struct auxtrace_cache;
> > > >
> > > > struct dso {
> > > > - pthread_mutex_t lock;
> > > > + struct mutex lock;
> > > > struct list_head node;
> > > > struct rb_node rb_node; /* rbtree node sorted by long name */
> > > > struct rb_root *root; /* root of rbtree that rb_node is in */
> > > > diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
> > > > index 1c085ab56534..bfce88e5eb0d 100644
> > > > --- a/tools/perf/util/hist.c
> > > > +++ b/tools/perf/util/hist.c
> > > > @@ -1622,13 +1622,13 @@ struct rb_root_cached *hists__get_rotate_entries_in(struct hists *hists)
> > > > {
> > > > struct rb_root_cached *root;
> > > >
> > > > - pthread_mutex_lock(&hists->lock);
> > > > + mutex_lock(&hists->lock);
> > > >
> > > > root = hists->entries_in;
> > > > if (++hists->entries_in > &hists->entries_in_array[1])
> > > > hists->entries_in = &hists->entries_in_array[0];
> > > >
> > > > - pthread_mutex_unlock(&hists->lock);
> > > > + mutex_unlock(&hists->lock);
> > > >
> > > > return root;
> > > > }
> > > > @@ -2805,7 +2805,7 @@ int __hists__init(struct hists *hists, struct perf_hpp_list *hpp_list)
> > > > hists->entries_in = &hists->entries_in_array[0];
> > > > hists->entries_collapsed = RB_ROOT_CACHED;
> > > > hists->entries = RB_ROOT_CACHED;
> > > > - pthread_mutex_init(&hists->lock, NULL);
> > > > + mutex_init(&hists->lock, /*pshared=*/false);
> > > > hists->socket_filter = -1;
> > > > hists->hpp_list = hpp_list;
> > > > INIT_LIST_HEAD(&hists->hpp_formats);
> > > > diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
> > > > index 7ed4648d2fc2..508428b2c1b2 100644
> > > > --- a/tools/perf/util/hist.h
> > > > +++ b/tools/perf/util/hist.h
> > > > @@ -4,10 +4,10 @@
> > > >
> > > > #include <linux/rbtree.h>
> > > > #include <linux/types.h>
> > > > -#include <pthread.h>
> > > > #include "evsel.h"
> > > > #include "color.h"
> > > > #include "events_stats.h"
> > > > +#include "mutex.h"
> > > >
> > > > struct hist_entry;
> > > > struct hist_entry_ops;
> > > > @@ -98,7 +98,7 @@ struct hists {
> > > > const struct dso *dso_filter;
> > > > const char *uid_filter_str;
> > > > const char *symbol_filter_str;
> > > > - pthread_mutex_t lock;
> > > > + struct mutex lock;
> > > > struct hists_stats stats;
> > > > u64 event_stream;
> > > > u16 col_len[HISTC_NR_COLS];
> > > > diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
> > > > index cd8b0777473b..cd4ccec7f361 100644
> > > > --- a/tools/perf/util/mmap.h
> > > > +++ b/tools/perf/util/mmap.h
> > > > @@ -9,7 +9,6 @@
> > > > #include <linux/bitops.h>
> > > > #include <perf/cpumap.h>
> > > > #include <stdbool.h>
> > > > -#include <pthread.h> // for cpu_set_t
> > > > #ifdef HAVE_AIO_SUPPORT
> > > > #include <aio.h>
> > > > #endif
> > > > diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
> > > > index a4b22caa7c24..656d9b4dd456 100644
> > > > --- a/tools/perf/util/symbol.c
> > > > +++ b/tools/perf/util/symbol.c
> > > > @@ -1800,7 +1800,7 @@ int dso__load(struct dso *dso, struct map *map)
> > > > }
> > > >
> > > > nsinfo__mountns_enter(dso->nsinfo, &nsc);
> > > > - pthread_mutex_lock(&dso->lock);
> > > > + mutex_lock(&dso->lock);
> > > >
> > > > /* check again under the dso->lock */
> > > > if (dso__loaded(dso)) {
> > > > @@ -1964,7 +1964,7 @@ int dso__load(struct dso *dso, struct map *map)
> > > > ret = 0;
> > > > out:
> > > > dso__set_loaded(dso);
> > > > - pthread_mutex_unlock(&dso->lock);
> > > > + mutex_unlock(&dso->lock);
> > > > nsinfo__mountns_exit(&nsc);
> > > >
> > > > return ret;
> > > > diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
> > > > index 1c2c0a838430..a8b0d79bd96c 100644
> > > > --- a/tools/perf/util/top.h
> > > > +++ b/tools/perf/util/top.h
> > > > @@ -5,6 +5,7 @@
> > > > #include "tool.h"
> > > > #include "evswitch.h"
> > > > #include "annotate.h"
> > > > +#include "mutex.h"
> > > > #include "ordered-events.h"
> > > > #include "record.h"
> > > > #include <linux/types.h>
> > > > @@ -53,8 +54,8 @@ struct perf_top {
> > > > struct ordered_events *in;
> > > > struct ordered_events data[2];
> > > > bool rotate;
> > > > - pthread_mutex_t mutex;
> > > > - pthread_cond_t cond;
> > > > + struct mutex mutex;
> > > > + struct cond cond;
> > > > } qe;
> > > > };
> > > >
> > > > --
> > > > 2.37.1.595.g718a3a8f04-goog
> > >
> > > --
> > >
> > > - Arnaldo
>
> --
>
> - Arnaldo

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