From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E02D81ACEAE; Thu, 9 Jan 2025 21:43:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736459031; cv=none; b=bUd91PVpdOSYUPGUU1KQ11vKouWm4hLAPFT3QoODItShTxNZqYcSEeL5uITRhMmSoX224fLJ5XRUbCR5StzB2TGj1EmPZuLmJQkHI60tqsYSJlqaBm82m5PICrd7a3UKMH794sjVmQoBUhhnKr9huT3myaTAJxVT7JgqonBRHrg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736459031; c=relaxed/simple; bh=M0snV44UFgly4ylZ82gceg9saj8Zti2LYEIqYCeS/kY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DerAycNxFaSezcwLQ5ybHf7p6FfQsqQDt7+Om/nn7DTQ9Mayd18SZopq4Rl+5pHZBBng9MA2+fnCcGRWig4KF3IAbLhm3bRWEng1e9FWDZUbegJfNH/5mownItbRa2sD9dN6a8Y7IcpLFWZ4EY2PHyC0OIQkqZVpYu8I8cendMA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WiEuB6+E; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WiEuB6+E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 503C0C4CED2; Thu, 9 Jan 2025 21:43:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736459029; bh=M0snV44UFgly4ylZ82gceg9saj8Zti2LYEIqYCeS/kY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=WiEuB6+EMhIOrGoGMA6MrOvyTB4uPzg0gQpWFKkTHoPDQcyW+3KvyjVgfvnww+5cZ BAzpASOK2s6SMhixrye2OwLt/gqoGIQJQt+2stRdKvYpxi4JC41G0uLCFSrQzifCq8 GRIE+eAEUFsFgTU9aLyHBOu6pGd/xS0vukk5uW9GmrTl8mYhgr2dlEq6IGEa2nqh46 cXxcAPUNU7Eshpusz9D2lmETZ4BJauiQMW+5O56g9C2tuldNJdhR0XQd77CpnS51AR xKq32frREjLU4DykqiTRYNq0WzadQJ6XbviBbZW7HuYWHY7njWGL5VGPCr7XulmI0b r66Y1Ee1LeO0g== Date: Thu, 9 Jan 2025 13:43:47 -0800 From: Namhyung Kim To: Dmitry Vyukov Cc: irogers@google.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] perf hist: Deduplicate cmp/sort/collapse code Message-ID: References: <4bf65a9a789a0bb78e4a3e120ad30389725d2249.1736321686.git.dvyukov@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <4bf65a9a789a0bb78e4a3e120ad30389725d2249.1736321686.git.dvyukov@google.com> Hello, On Wed, Jan 08, 2025 at 08:36:53AM +0100, Dmitry Vyukov wrote: > Application of cmp/sort/collapse fmt callbacks is duplicated 6 times. > Factor it into a common helper function. NFC. It's interesting to use offsetof and cast it to functions. :) > > Signed-off-by: Dmitry Vyukov > Cc: Namhyung Kim > Cc: Ian Rogers > Cc: linux-perf-users@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > --- > tools/perf/util/hist.c | 104 +++++++++++++++++------------------------ > tools/perf/util/hist.h | 2 - > 2 files changed, 44 insertions(+), 62 deletions(-) > > diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c > index fff1345658016..8e4e844425370 100644 > --- a/tools/perf/util/hist.c > +++ b/tools/perf/util/hist.c > @@ -32,6 +32,9 @@ > #include > #include > > +static int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right); > +static int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right); > + > static bool hists__filter_entry_by_dso(struct hists *hists, > struct hist_entry *he); > static bool hists__filter_entry_by_thread(struct hists *hists, > @@ -1292,19 +1295,27 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al, > return err; > } > > -int64_t > -hist_entry__cmp(struct hist_entry *left, struct hist_entry *right) > +static int64_t > +hist_entry__cmp_impl(struct perf_hpp_list *hpp_list, struct hist_entry *left, > + struct hist_entry *right, unsigned long fn_offset, > + bool ignore_dynamic, bool ignore_skipped) > { > + typedef int64_t (*fn_t)(struct perf_hpp_fmt *, struct hist_entry *, struct hist_entry *); Probably better to put it in util/hist.h and each members (cmp, collapse, sort) use the typedef to make sure they remain in the same. > struct hists *hists = left->hists; > struct perf_hpp_fmt *fmt; > int64_t cmp = 0; > + fn_t fn; > > - hists__for_each_sort_list(hists, fmt) { > - if (perf_hpp__is_dynamic_entry(fmt) && > + perf_hpp_list__for_each_sort_list(hpp_list, fmt) { > + if (ignore_dynamic && perf_hpp__is_dynamic_entry(fmt) && > !perf_hpp__defined_dynamic_entry(fmt, hists)) > continue; > > - cmp = fmt->cmp(fmt, left, right); > + if (ignore_skipped && perf_hpp__should_skip(fmt, hists)) > + continue; > + > + fn = *(fn_t *)(((char *)fmt) + fn_offset); Doesn't just below work? fn = (void *)fmt + fn_offset; Thanks, Namhyung > + cmp = fn(fmt, left, right); > if (cmp) > break; > } > @@ -1313,23 +1324,33 @@ hist_entry__cmp(struct hist_entry *left, struct hist_entry *right) > } > > int64_t > -hist_entry__collapse(struct hist_entry *left, struct hist_entry *right) > +hist_entry__cmp(struct hist_entry *left, struct hist_entry *right) > { > - struct hists *hists = left->hists; > - struct perf_hpp_fmt *fmt; > - int64_t cmp = 0; > + return hist_entry__cmp_impl(left->hists->hpp_list, left, right, > + offsetof(struct perf_hpp_fmt, cmp), true, false); > +} > > - hists__for_each_sort_list(hists, fmt) { > - if (perf_hpp__is_dynamic_entry(fmt) && > - !perf_hpp__defined_dynamic_entry(fmt, hists)) > - continue; > +static int64_t > +hist_entry__sort(struct hist_entry *left, struct hist_entry *right) > +{ > + return hist_entry__cmp_impl(left->hists->hpp_list, left, right, > + offsetof(struct perf_hpp_fmt, sort), false, true); > +} > > - cmp = fmt->collapse(fmt, left, right); > - if (cmp) > - break; > - } > +int64_t > +hist_entry__collapse(struct hist_entry *left, struct hist_entry *right) > +{ > + return hist_entry__cmp_impl(left->hists->hpp_list, left, right, > + offsetof(struct perf_hpp_fmt, collapse), true, false); > +} > > - return cmp; > +static int64_t > +hist_entry__collapse_hierarchy(struct perf_hpp_list *hpp_list, > + struct hist_entry *left, > + struct hist_entry *right) > +{ > + return hist_entry__cmp_impl(hpp_list, left, right, > + offsetof(struct perf_hpp_fmt, collapse), false, false); > } > > void hist_entry__delete(struct hist_entry *he) > @@ -1503,14 +1524,7 @@ static struct hist_entry *hierarchy_insert_entry(struct hists *hists, > while (*p != NULL) { > parent = *p; > iter = rb_entry(parent, struct hist_entry, rb_node_in); > - > - cmp = 0; > - perf_hpp_list__for_each_sort_list(hpp_list, fmt) { > - cmp = fmt->collapse(fmt, iter, he); > - if (cmp) > - break; > - } > - > + cmp = hist_entry__collapse_hierarchy(hpp_list, iter, he); > if (!cmp) { > he_stat__add_stat(&iter->stat, &he->stat); > return iter; > @@ -1730,24 +1744,6 @@ int hists__collapse_resort(struct hists *hists, struct ui_progress *prog) > return 0; > } > > -static int64_t hist_entry__sort(struct hist_entry *a, struct hist_entry *b) > -{ > - struct hists *hists = a->hists; > - struct perf_hpp_fmt *fmt; > - int64_t cmp = 0; > - > - hists__for_each_sort_list(hists, fmt) { > - if (perf_hpp__should_skip(fmt, a->hists)) > - continue; > - > - cmp = fmt->sort(fmt, a, b); > - if (cmp) > - break; > - } > - > - return cmp; > -} > - > static void hists__reset_filter_stats(struct hists *hists) > { > hists->nr_non_filtered_entries = 0; > @@ -2449,21 +2445,15 @@ static struct hist_entry *add_dummy_hierarchy_entry(struct hists *hists, > struct rb_node **p; > struct rb_node *parent = NULL; > struct hist_entry *he; > - struct perf_hpp_fmt *fmt; > bool leftmost = true; > > p = &root->rb_root.rb_node; > while (*p != NULL) { > - int64_t cmp = 0; > + int64_t cmp; > > parent = *p; > he = rb_entry(parent, struct hist_entry, rb_node_in); > - > - perf_hpp_list__for_each_sort_list(he->hpp_list, fmt) { > - cmp = fmt->collapse(fmt, he, pair); > - if (cmp) > - break; > - } > + cmp = hist_entry__collapse_hierarchy(he->hpp_list, he, pair); > if (!cmp) > goto out; > > @@ -2521,16 +2511,10 @@ static struct hist_entry *hists__find_hierarchy_entry(struct rb_root_cached *roo > > while (n) { > struct hist_entry *iter; > - struct perf_hpp_fmt *fmt; > - int64_t cmp = 0; > + int64_t cmp; > > iter = rb_entry(n, struct hist_entry, rb_node_in); > - perf_hpp_list__for_each_sort_list(he->hpp_list, fmt) { > - cmp = fmt->collapse(fmt, iter, he); > - if (cmp) > - break; > - } > - > + cmp = hist_entry__collapse_hierarchy(he->hpp_list, iter, he); > if (cmp < 0) > n = n->rb_left; > else if (cmp > 0) > diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h > index 1131056924d9c..6cff03eb043b7 100644 > --- a/tools/perf/util/hist.h > +++ b/tools/perf/util/hist.h > @@ -342,8 +342,6 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al, > struct perf_hpp; > struct perf_hpp_fmt; > > -int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right); > -int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right); > int hist_entry__transaction_len(void); > int hist_entry__sort_snprintf(struct hist_entry *he, char *bf, size_t size, > struct hists *hists); > -- > 2.47.1.613.gc27f4b7a9f-goog >