From 053d49a231b863e8c0fafda28427fbe6a40d0ad2 Mon Sep 17 00:00:00 2001
From: "K. Lange" <klange@toaruos.org>
Date: Fri, 14 Sep 2018 21:11:26 +0900
Subject: [PATCH] Also calculate rough percentage

As this includes shm, it overestimates and values may add up to more than 100%
---
 apps/ps.c        | 19 ++++++++++++++-----
 modules/procfs.c |  4 +++-
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/apps/ps.c b/apps/ps.c
index 50a51183..f07acc72 100644
--- a/apps/ps.c
+++ b/apps/ps.c
@@ -29,13 +29,14 @@ static int show_username = 0;
 static int show_mem = 0;
 static int collect_commandline = 0;
 
-static int widths[5] = {3,3,4,3,3};
+static int widths[] = {3,3,4,3,3,4};
 
 struct process {
 	int uid;
 	int pid;
 	int tid;
 	int mem;
+	int vsz;
 	int shm;
 	char * process;
 	char * command_line;
@@ -58,7 +59,7 @@ struct process * process_entry(struct dirent *dent) {
 	FILE * f;
 	char line[LINE_LEN];
 
-	int pid = 0, uid = 0, tgid = 0, mem = 0, shm = 0;
+	int pid = 0, uid = 0, tgid = 0, mem = 0, shm = 0, vsz = 0;
 	char name[100];
 
 	sprintf(tmp, "/proc/%s/status", dent->d_name);
@@ -87,9 +88,11 @@ struct process * process_entry(struct dirent *dent) {
 		} else if (strstr(line, "Name:") == line) {
 			strcpy(name, tab);
 		} else if (strstr(line, "VmSize:") == line) {
-			mem = atoi(tab);
+			vsz = atoi(tab);
 		} else if (strstr(line, "RssShmem:") == line) {
 			shm = atoi(tab);
+		} else if (strstr(line, "MemPermille:") == line) {
+			mem = atoi(tab);
 		}
 	}
 
@@ -110,6 +113,7 @@ struct process * process_entry(struct dirent *dent) {
 	out->tid = pid;
 	out->mem = mem;
 	out->shm = shm;
+	out->vsz = vsz;
 	out->process = strdup(name);
 	out->command_line = NULL;
 
@@ -118,8 +122,9 @@ struct process * process_entry(struct dirent *dent) {
 
 	if ((len = sprintf(garbage, "%d", out->pid)) > widths[0]) widths[0] = len;
 	if ((len = sprintf(garbage, "%d", out->tid)) > widths[1]) widths[1] = len;
-	if ((len = sprintf(garbage, "%d", out->mem)) > widths[3]) widths[3] = len;
+	if ((len = sprintf(garbage, "%d", out->vsz)) > widths[3]) widths[3] = len;
 	if ((len = sprintf(garbage, "%d", out->shm)) > widths[4]) widths[4] = len;
+	if ((len = sprintf(garbage, "%d.%01d", out->mem / 10, out->mem % 10)) > widths[5]) widths[5] = len;
 
 	struct passwd * p = getpwuid(out->uid);
 	if (p) {
@@ -161,6 +166,7 @@ void print_header(void) {
 		printf("%*s ", widths[1], "TID");
 	}
 	if (show_mem) {
+		printf("%*s ", widths[5], "MEM%");
 		printf("%*s ", widths[3], "VSZ");
 		printf("%*s ", widths[4], "SHM");
 	}
@@ -182,7 +188,10 @@ void print_entry(struct process * out) {
 		printf("%*d ", widths[1], out->tid);
 	}
 	if (show_mem) {
-		printf("%*d ", widths[3], out->mem);
+		char tmp[6];
+		sprintf(tmp, "%*d.%01d", widths[5]-2, out->mem / 10, out->mem % 10);
+		printf("%*s ", widths[5], tmp);
+		printf("%*d ", widths[3], out->vsz);
 		printf("%*d ", widths[4], out->shm);
 	}
 	if (out->command_line) {
diff --git a/modules/procfs.c b/modules/procfs.c
index 826c88f5..7d91ea8e 100644
--- a/modules/procfs.c
+++ b/modules/procfs.c
@@ -159,6 +159,7 @@ static uint32_t proc_status_func(fs_node_t *node, uint32_t offset, uint32_t size
 	/* Calculate process memory usage */
 	int mem_usage = calculate_memory_usage(proc->thread.page_directory) * 4;
 	int shm_usage = calculate_shm_resident(proc->thread.page_directory) * 4;
+	int mem_permille = 1000 * (mem_usage + shm_usage) / memory_total();
 
 	sprintf(buf,
 			"Name:\t%s\n" /* name */
@@ -177,6 +178,7 @@ static uint32_t proc_status_func(fs_node_t *node, uint32_t offset, uint32_t size
 			"Path:\t%s\n"
 			"VmSize:\t %d kB\n"
 			"RssShmem:\t %d kB\n"
+			"MemPermille:\t %d\n"
 			,
 			name,
 			state,
@@ -192,7 +194,7 @@ static uint32_t proc_status_func(fs_node_t *node, uint32_t offset, uint32_t size
 			proc->syscall_registers ? proc->syscall_registers->esi : 0,
 			proc->syscall_registers ? proc->syscall_registers->edi : 0,
 			proc->cmdline ? proc->cmdline[0] : "(none)",
-			mem_usage, shm_usage
+			mem_usage, shm_usage, mem_permille
 			);
 
 	size_t _bsize = strlen(buf);