perf sort: Make column width code per hists instance

They were globals, and since we support multiple hists and sessions
at the same time, it doesn't make sense to calculate those values
considereing all symbols in all sessions.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

8 files changed, 140 insertions, 79 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index d7f21d7..121339f 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -340,30 +340,29 @@ int event__synthesize_kernel_mmap(event__handler_t process,
 	return process(&ev, session);
 }
 
-static void thread__comm_adjust(struct thread *self)
+static void thread__comm_adjust(struct thread *self, struct hists *hists)
 {
 	char *comm = self->comm;
 
 	if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 	    (!symbol_conf.comm_list ||
 	     strlist__has_entry(symbol_conf.comm_list, comm))) {
-		unsigned int slen = strlen(comm);
+		u16 slen = strlen(comm);
 
-		if (slen > comms__col_width) {
-			comms__col_width = slen;
-			threads__col_width = slen + 6;
-		}
+		if (hists__new_col_len(hists, HISTC_COMM, slen))
+			hists__set_col_len(hists, HISTC_THREAD, slen + 6);
 	}
 }
 
-static int thread__set_comm_adjust(struct thread *self, const char *comm)
+static int thread__set_comm_adjust(struct thread *self, const char *comm,
+				   struct hists *hists)
 {
 	int ret = thread__set_comm(self, comm);
 
 	if (ret)
 		return ret;
 
-	thread__comm_adjust(self);
+	thread__comm_adjust(self, hists);
 
 	return 0;
 }
@@ -374,7 +373,8 @@ int event__process_comm(event_t *self, struct perf_session *session)
 
 	dump_printf(": %s:%d\n", self->comm.comm, self->comm.tid);
 
-	if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm)) {
+	if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm,
+						      &session->hists)) {
 		dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 		return -1;
 	}
@@ -641,16 +641,13 @@ void thread__find_addr_location(struct thread *self,
 		al->sym = NULL;
 }
 
-static void dso__calc_col_width(struct dso *self)
+static void dso__calc_col_width(struct dso *self, struct hists *hists)
 {
 	if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 	    (!symbol_conf.dso_list ||
 	     strlist__has_entry(symbol_conf.dso_list, self->name))) {
-		u16 slen = self->short_name_len;
-		if (verbose)
-			slen = self->long_name_len;
-		if (dsos__col_width < slen)
-			dsos__col_width = slen;
+		u16 slen = dso__name_len(self);
+		hists__new_col_len(hists, HISTC_DSO, slen);
 	}
 
 	self->slen_calculated = 1;
@@ -729,16 +726,17 @@ int event__preprocess_sample(const event_t *self, struct perf_session *session,
 		 * sampled.
 		 */
 		if (!sort_dso.elide && !al->map->dso->slen_calculated)
-			dso__calc_col_width(al->map->dso);
+			dso__calc_col_width(al->map->dso, &session->hists);
 
 		al->sym = map__find_symbol(al->map, al->addr, filter);
 	} else {
 		const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
 
-		if (dsos__col_width < unresolved_col_width &&
+		if (hists__col_len(&session->hists, HISTC_DSO) < unresolved_col_width &&
 		    !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 		    !symbol_conf.dso_list)
-			dsos__col_width = unresolved_col_width;
+			hists__set_col_len(&session->hists, HISTC_DSO,
+					   unresolved_col_width);
 	}
 
 	if (symbol_conf.sym_list && al->sym &&
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index d998d1d..0bc6790 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -16,6 +16,50 @@ struct callchain_param	callchain_param = {
 	.min_percent = 0.5
 };
 
+u16 hists__col_len(struct hists *self, enum hist_column col)
+{
+	return self->col_len[col];
+}
+
+void hists__set_col_len(struct hists *self, enum hist_column col, u16 len)
+{
+	self->col_len[col] = len;
+}
+
+bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len)
+{
+	if (len > hists__col_len(self, col)) {
+		hists__set_col_len(self, col, len);
+		return true;
+	}
+	return false;
+}
+
+static void hists__reset_col_len(struct hists *self)
+{
+	enum hist_column col;
+
+	for (col = 0; col < HISTC_NR_COLS; ++col)
+		hists__set_col_len(self, col, 0);
+}
+
+static void hists__calc_col_len(struct hists *self, struct hist_entry *h)
+{
+	u16 len;
+
+	if (h->ms.sym)
+		hists__new_col_len(self, HISTC_SYMBOL, h->ms.sym->namelen);
+
+	len = thread__comm_len(h->thread);
+	if (hists__new_col_len(self, HISTC_COMM, len))
+		hists__set_col_len(self, HISTC_THREAD, len + 6);
+
+	if (h->ms.map) {
+		len = dso__name_len(h->ms.map->dso);
+		hists__new_col_len(self, HISTC_DSO, len);
+	}
+}
+
 static void hist_entry__add_cpumode_period(struct hist_entry *self,
 					   unsigned int cpumode, u64 period)
 {
@@ -56,13 +100,12 @@ static struct hist_entry *hist_entry__new(struct hist_entry *template)
 	return self;
 }
 
-static void hists__inc_nr_entries(struct hists *self, struct hist_entry *entry)
+static void hists__inc_nr_entries(struct hists *self, struct hist_entry *h)
 {
-	if (entry->filtered)
-		return;
-	if (entry->ms.sym && self->max_sym_namelen < entry->ms.sym->namelen)
-		self->max_sym_namelen = entry->ms.sym->namelen;
-	++self->nr_entries;
+	if (!h->filtered) {
+		hists__calc_col_len(self, h);
+		++self->nr_entries;
+	}
 }
 
 static u8 symbol__parent_filter(const struct symbol *parent)
@@ -208,7 +251,7 @@ void hists__collapse_resort(struct hists *self)
 	tmp = RB_ROOT;
 	next = rb_first(&self->entries);
 	self->nr_entries = 0;
-	self->max_sym_namelen = 0;
+	hists__reset_col_len(self);
 
 	while (next) {
 		n = rb_entry(next, struct hist_entry, rb_node);
@@ -265,7 +308,7 @@ void hists__output_resort(struct hists *self)
 	next = rb_first(&self->entries);
 
 	self->nr_entries = 0;
-	self->max_sym_namelen = 0;
+	hists__reset_col_len(self);
 
 	while (next) {
 		n = rb_entry(next, struct hist_entry, rb_node);
@@ -532,8 +575,9 @@ static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
 }
 
 int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
-			 struct hists *pair_hists, bool show_displacement,
-			 long displacement, bool color, u64 session_total)
+			 struct hists *hists, struct hists *pair_hists,
+			 bool show_displacement, long displacement,
+			 bool color, u64 session_total)
 {
 	struct sort_entry *se;
 	u64 period, total, period_sys, period_us, period_guest_sys, period_guest_us;
@@ -637,24 +681,25 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
 
 		ret += snprintf(s + ret, size - ret, "%s", sep ?: "  ");
 		ret += se->se_snprintf(self, s + ret, size - ret,
-				       se->se_width ? *se->se_width : 0);
+				       hists__col_len(hists, se->se_width_idx));
 	}
 
 	return ret;
 }
 
-int hist_entry__fprintf(struct hist_entry *self, struct hists *pair_hists,
-			bool show_displacement, long displacement, FILE *fp,
-			u64 session_total)
+int hist_entry__fprintf(struct hist_entry *self, struct hists *hists,
+			struct hists *pair_hists, bool show_displacement,
+			long displacement, FILE *fp, u64 session_total)
 {
 	char bf[512];
-	hist_entry__snprintf(self, bf, sizeof(bf), pair_hists,
+	hist_entry__snprintf(self, bf, sizeof(bf), hists, pair_hists,
 			     show_displacement, displacement,
 			     true, session_total);
 	return fprintf(fp, "%s\n", bf);
 }
 
-static size_t hist_entry__fprintf_callchain(struct hist_entry *self, FILE *fp,
+static size_t hist_entry__fprintf_callchain(struct hist_entry *self,
+					    struct hists *hists, FILE *fp,
 					    u64 session_total)
 {
 	int left_margin = 0;
@@ -662,7 +707,7 @@ static size_t hist_entry__fprintf_callchain(struct hist_entry *self, FILE *fp,
 	if (sort__first_dimension == SORT_COMM) {
 		struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
 							 typeof(*se), list);
-		left_margin = se->se_width ? *se->se_width : 0;
+		left_margin = hists__col_len(hists, se->se_width_idx);
 		left_margin -= thread__comm_len(self->thread);
 	}
 
@@ -733,17 +778,17 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 			continue;
 		}
 		width = strlen(se->se_header);
-		if (se->se_width) {
-			if (symbol_conf.col_width_list_str) {
-				if (col_width) {
-					*se->se_width = atoi(col_width);
-					col_width = strchr(col_width, ',');
-					if (col_width)
-						++col_width;
-				}
+		if (symbol_conf.col_width_list_str) {
+			if (col_width) {
+				hists__set_col_len(self, se->se_width_idx,
+						   atoi(col_width));
+				col_width = strchr(col_width, ',');
+				if (col_width)
+					++col_width;
 			}
-			width = *se->se_width = max(*se->se_width, width);
 		}
+		if (!hists__new_col_len(self, se->se_width_idx, width))
+			width = hists__col_len(self, se->se_width_idx);
 		fprintf(fp, "  %*s", width, se->se_header);
 	}
 	fprintf(fp, "\n");
@@ -766,9 +811,8 @@ size_t hists__fprintf(struct hists *self, struct hists *pair,
 			continue;
 
 		fprintf(fp, "  ");
-		if (se->se_width)
-			width = *se->se_width;
-		else
+		width = hists__col_len(self, se->se_width_idx);
+		if (width == 0)
 			width = strlen(se->se_header);
 		for (i = 0; i < width; i++)
 			fprintf(fp, ".");
@@ -788,12 +832,12 @@ print_entries:
 				displacement = 0;
 			++position;
 		}
-		ret += hist_entry__fprintf(h, pair, show_displacement,
+		ret += hist_entry__fprintf(h, self, pair, show_displacement,
 					   displacement, fp, self->stats.total_period);
 
 		if (symbol_conf.use_callchain)
-			ret += hist_entry__fprintf_callchain(h, fp, self->stats.total_period);
-
+			ret += hist_entry__fprintf_callchain(h, self, fp,
+							     self->stats.total_period);
 		if (h->ms.map == NULL && verbose > 1) {
 			__map_groups__fprintf_maps(&h->thread->mg,
 						   MAP__FUNCTION, verbose, fp);
@@ -817,8 +861,7 @@ static void hists__remove_entry_filter(struct hists *self, struct hist_entry *h,
 	self->stats.total_period += h->period;
 	self->stats.nr_events[PERF_RECORD_SAMPLE] += h->nr_events;
 
-	if (h->ms.sym && self->max_sym_namelen < h->ms.sym->namelen)
-		self->max_sym_namelen = h->ms.sym->namelen;
+	hists__calc_col_len(self, h);
 }
 
 void hists__filter_by_dso(struct hists *self, const struct dso *dso)
@@ -827,7 +870,7 @@ void hists__filter_by_dso(struct hists *self, const struct dso *dso)
 
 	self->nr_entries = self->stats.total_period = 0;
 	self->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
-	self->max_sym_namelen = 0;
+	hists__reset_col_len(self);
 
 	for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
@@ -850,7 +893,7 @@ void hists__filter_by_thread(struct hists *self, const struct thread *thread)
 
 	self->nr_entries = self->stats.total_period = 0;
 	self->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
-	self->max_sym_namelen = 0;
+	hists__reset_col_len(self);
 
 	for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
 		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 83fa33a..92962b2 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -56,6 +56,16 @@ struct events_stats {
 	u32 nr_unknown_events;
 };
 
+enum hist_column {
+	HISTC_SYMBOL,
+	HISTC_DSO,
+	HISTC_THREAD,
+	HISTC_COMM,
+	HISTC_PARENT,
+	HISTC_CPU,
+	HISTC_NR_COLS, /* Last entry */
+};
+
 struct hists {
 	struct rb_node		rb_node;
 	struct rb_root		entries;
@@ -64,7 +74,7 @@ struct hists {
 	u64			config;
 	u64			event_stream;
 	u32			type;
-	u32			max_sym_namelen;
+	u16			col_len[HISTC_NR_COLS];
 };
 
 struct hist_entry *__hists__add_entry(struct hists *self,
@@ -72,12 +82,13 @@ struct hist_entry *__hists__add_entry(struct hists *self,
 				      struct symbol *parent, u64 period);
 extern int64_t hist_entry__cmp(struct hist_entry *, struct hist_entry *);
 extern int64_t hist_entry__collapse(struct hist_entry *, struct hist_entry *);
-int hist_entry__fprintf(struct hist_entry *self, struct hists *pair_hists,
-			bool show_displacement, long displacement, FILE *fp,
-			u64 total);
+int hist_entry__fprintf(struct hist_entry *self, struct hists *hists,
+			struct hists *pair_hists, bool show_displacement,
+			long displacement, FILE *fp, u64 total);
 int hist_entry__snprintf(struct hist_entry *self, char *bf, size_t size,
-			 struct hists *pair_hists, bool show_displacement,
-			 long displacement, bool color, u64 total);
+			 struct hists *hists, struct hists *pair_hists,
+			 bool show_displacement, long displacement,
+			 bool color, u64 total);
 void hist_entry__free(struct hist_entry *);
 
 void hists__output_resort(struct hists *self);
@@ -95,6 +106,10 @@ int hist_entry__annotate(struct hist_entry *self, struct list_head *head);
 void hists__filter_by_dso(struct hists *self, const struct dso *dso);
 void hists__filter_by_thread(struct hists *self, const struct thread *thread);
 
+u16 hists__col_len(struct hists *self, enum hist_column col);
+void hists__set_col_len(struct hists *self, enum hist_column col, u16 len);
+bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len);
+
 #ifdef NO_NEWT_SUPPORT
 static inline int hists__browse(struct hists *self __used,
 				const char *helpline __used,
diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
index 7979003..ab6eb36 100644
--- a/tools/perf/util/newt.c
+++ b/tools/perf/util/newt.c
@@ -692,7 +692,8 @@ static void hist_entry__append_callchain_browser(struct hist_entry *self,
 }
 
 static size_t hist_entry__append_browser(struct hist_entry *self,
-					 newtComponent tree, u64 total)
+					 newtComponent tree,
+					 struct hists *hists)
 {
 	char s[256];
 	size_t ret;
@@ -700,8 +701,8 @@ static size_t hist_entry__append_browser(struct hist_entry *self,
 	if (symbol_conf.exclude_other && !self->parent)
 		return 0;
 
-	ret = hist_entry__snprintf(self, s, sizeof(s), NULL,
-				   false, 0, false, total);
+	ret = hist_entry__snprintf(self, s, sizeof(s), hists, NULL,
+				   false, 0, false, hists->stats.total_period);
 	if (symbol_conf.use_callchain) {
 		int indexes[2];
 
@@ -842,7 +843,7 @@ static int hist_browser__populate(struct hist_browser *self, struct hists *hists
 		if (h->filtered)
 			continue;
 
-		len = hist_entry__append_browser(h, self->tree, hists->stats.total_period);
+		len = hist_entry__append_browser(h, self->tree, hists);
 		if (len > max_len)
 			max_len = len;
 		if (symbol_conf.use_callchain)
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index c27b4b0..1c61a4f 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1,4 +1,5 @@
 #include "sort.h"
+#include "hist.h"
 
 regex_t		parent_regex;
 const char	default_parent_pattern[] = "^sys_|^do_page_fault";
@@ -10,11 +11,6 @@ int		sort__has_parent = 0;
 
 enum sort_type	sort__first_dimension;
 
-unsigned int dsos__col_width;
-unsigned int comms__col_width;
-unsigned int threads__col_width;
-unsigned int cpus__col_width;
-static unsigned int parent_symbol__col_width;
 char * field_sep;
 
 LIST_HEAD(hist_entry__sort_list);
@@ -36,7 +32,7 @@ struct sort_entry sort_thread = {
 	.se_header	= "Command:  Pid",
 	.se_cmp		= sort__thread_cmp,
 	.se_snprintf	= hist_entry__thread_snprintf,
-	.se_width	= &threads__col_width,
+	.se_width_idx	= HISTC_THREAD,
 };
 
 struct sort_entry sort_comm = {
@@ -44,34 +40,35 @@ struct sort_entry sort_comm = {
 	.se_cmp		= sort__comm_cmp,
 	.se_collapse	= sort__comm_collapse,
 	.se_snprintf	= hist_entry__comm_snprintf,
-	.se_width	= &comms__col_width,
+	.se_width_idx	= HISTC_COMM,
 };
 
 struct sort_entry sort_dso = {
 	.se_header	= "Shared Object",
 	.se_cmp		= sort__dso_cmp,
 	.se_snprintf	= hist_entry__dso_snprintf,
-	.se_width	= &dsos__col_width,
+	.se_width_idx	= HISTC_DSO,
 };
 
 struct sort_entry sort_sym = {
 	.se_header	= "Symbol",
 	.se_cmp		= sort__sym_cmp,
 	.se_snprintf	= hist_entry__sym_snprintf,
+	.se_width_idx	= HISTC_SYMBOL,
 };
 
 struct sort_entry sort_parent = {
 	.se_header	= "Parent symbol",
 	.se_cmp		= sort__parent_cmp,
 	.se_snprintf	= hist_entry__parent_snprintf,
-	.se_width	= &parent_symbol__col_width,
+	.se_width_idx	= HISTC_PARENT,
 };
  
 struct sort_entry sort_cpu = {
 	.se_header      = "CPU",
 	.se_cmp	        = sort__cpu_cmp,
 	.se_snprintf    = hist_entry__cpu_snprintf,
-	.se_width	= &cpus__col_width,
+	.se_width_idx	= HISTC_CPU,
 };
 
 struct sort_dimension {
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 560c855..03a1722 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -36,10 +36,6 @@ extern struct sort_entry sort_comm;
 extern struct sort_entry sort_dso;
 extern struct sort_entry sort_sym;
 extern struct sort_entry sort_parent;
-extern unsigned int dsos__col_width;
-extern unsigned int comms__col_width;
-extern unsigned int threads__col_width;
-extern unsigned int cpus__col_width;
 extern enum sort_type sort__first_dimension;
 
 struct hist_entry {
@@ -87,7 +83,7 @@ struct sort_entry {
 	int64_t (*se_collapse)(struct hist_entry *, struct hist_entry *);
 	int	(*se_snprintf)(struct hist_entry *self, char *bf, size_t size,
 			       unsigned int width);
-	unsigned int *se_width;
+	u8	se_width_idx;
 	bool	elide;
 };
 
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 971d0a0..bc6e7e8 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -12,6 +12,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include "build-id.h"
+#include "debug.h"
 #include "symbol.h"
 #include "strlist.h"
 
@@ -40,6 +41,14 @@ struct symbol_conf symbol_conf = {
 	.try_vmlinux_path = true,
 };
 
+int dso__name_len(const struct dso *self)
+{
+	if (verbose)
+		return self->long_name_len;
+
+	return self->short_name_len;
+}
+
 bool dso__loaded(const struct dso *self, enum map_type type)
 {
 	return self->loaded & (1 << type);
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 80e569b..d436ee3 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -146,6 +146,8 @@ struct dso *dso__new(const char *name);
 struct dso *dso__new_kernel(const char *name);
 void dso__delete(struct dso *self);
 
+int dso__name_len(const struct dso *self);
+
 bool dso__loaded(const struct dso *self, enum map_type type);
 bool dso__sorted_by_name(const struct dso *self, enum map_type type);