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Reduce MKDEPS.COM latency from 60ms to 18ms

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This commit is contained in:
Justine Tunney 2022-06-11 12:21:42 -07:00
parent e96aceae41
commit 517267a577
5 changed files with 140 additions and 76 deletions
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BIN
build/bootstrap/mkdeps.com
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Binary file not shown.

3
examples/examples.mk
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@ -36,7 +36,8 @@ EXAMPLES_COMS = \
EXAMPLES_BINS = \
$(EXAMPLES_COMS) \
$(EXAMPLES_COMS:%=%.dbg)
$(EXAMPLES_COMS:%=%.dbg) \
o/$(MODE)/examples/life-nomod.com
EXAMPLES_DIRECTDEPS = \
DSP_CORE \

4
libc/calls/close.c
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@ -49,7 +49,6 @@
*/
int close(int fd) {
int rc;
__fds_lock();
if (fd == -1) {
rc = 0;
} else if (fd < 0) {
@ -78,10 +77,9 @@ int close(int fd) {
}
}
if (!__vforked) {
__releasefd_unlocked(fd);
__releasefd(fd);
}
}
__fds_unlock();
STRACE("%s(%d) → %d% m", "close", fd, rc);
return rc;
}

1
test/tool/build/lib/getargs_test.c
View file

@ -44,6 +44,7 @@ TEST(getargs, test) {
EXPECT_STREQ("dawg", getargs_next(&ga));
EXPECT_STREQ("fun", getargs_next(&ga));
EXPECT_EQ(NULL, getargs_next(&ga));
EXPECT_EQ(NULL, getargs_next(&ga));
getargs_destroy(&ga);
}

208
tool/build/mkdeps.c
View file

@ -29,21 +29,28 @@
#include "libc/errno.h"
#include "libc/fmt/fmt.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/spinlock.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/mem/alloca.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/crc32.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/runtime/ezmap.internal.h"
#include "libc/runtime/gc.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/runtime/sysconf.h"
#include "libc/stdio/append.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/madv.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/prot.h"
#include "libc/time/time.h"
#include "libc/x/x.h"
#include "third_party/getopt/getopt.h"
#include "tool/build/lib/getargs.h"
@ -113,14 +120,21 @@ struct Edges {
};
char *out;
char *bout;
char **tls;
int threads;
char **bouts;
char **stack;
unsigned counter;
uint32_t *visited;
struct GetArgs ga;
struct Edges edges;
struct Sauce *sauces;
struct Strings strings;
struct Sources sources;
const char *buildroot;
_Alignas(64) int galock;
_Alignas(64) int readlock;
_Alignas(64) int writelock;
_Alignas(64) int reportlock;
unsigned Hash(const void *s, size_t l) {
return max(1, crc32c(0, s, l));
@ -232,25 +246,33 @@ wontreturn void OnMissingFile(const char *list, const char *src) {
exit(1);
}
void LoadRelationships(int argc, char *argv[]) {
int LoadRelationshipsWorker(void *arg) {
int fd;
char *buf;
ssize_t rc;
bool skipme;
struct Edge edge;
struct GetArgs ga;
char *buf, *freeme;
char srcbuf[PATH_MAX];
size_t i, n, inclen, size;
unsigned srcid, dependency;
size_t i, inclen, size;
const char *p, *pe, *src, *path, *pathend;
inclen = strlen(kIncludePrefix);
buf = gc(xmemalign(PAGESIZE, PAGESIZE + MAX_READ + 16));
freeme = buf = memalign(PAGESIZE, PAGESIZE + MAX_READ + 16);
buf += PAGESIZE;
buf[-1] = '\n';
getargs_init(&ga, argv + optind);
while ((src = getargs_next(&ga))) {
for (;;) {
_spinlock(&galock);
if ((src = getargs_next(&ga))) strcpy(srcbuf, src);
_spunlock(&galock);
if (!src) break;
src = srcbuf;
if (ShouldSkipSource(src)) continue;
srcid = GetSourceId(src, strlen(src));
n = strlen(src);
_spinlock(&readlock);
srcid = GetSourceId(src, n);
_spunlock(&readlock);
if ((fd = open(src, O_RDONLY)) == -1) {
_spinlock(&reportlock);
OnMissingFile(ga.path, src);
}
CHECK_NE(-1, (rc = read(fd, buf, MAX_READ)));
@ -263,14 +285,39 @@ void LoadRelationships(int argc, char *argv[]) {
path = p + inclen;
pathend = memchr(path, '"', pe - path);
if (pathend && (p[-1] == '#' || p[-1] == '.') && p[-2] == '\n') {
_spinlock(&readlock);
dependency = GetSourceId(path, pathend - path);
_spunlock(&readlock);
edge.from = srcid;
edge.to = dependency;
_spinlock(&writelock);
append(&edges, &edge);
_spunlock(&writelock);
p = pathend;
}
}
}
free(freeme);
return 0;
}
void LoadRelationships(int argc, char *argv[]) {
int i;
getargs_init(&ga, argv + optind);
for (i = 0; i < threads; ++i) {
if (clone(LoadRelationshipsWorker, stack[i], GetStackSize(),
CLONE_THREAD | CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
CLONE_SETTLS | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID,
(void *)(intptr_t)i, 0, __initialize_tls(tls[i]), 64,
(int *)(tls[i] + 0x38)) == -1) {
_spinlock(&reportlock);
kprintf("error: clone(%d) failed %m\n", i);
exit(1);
}
}
for (i = 0; i < threads; ++i) {
_spinlock((int *)(tls[i] + 0x38));
}
getargs_destroy(&ga);
}
@ -294,19 +341,12 @@ void GetOpts(int argc, char *argv[]) {
if (isempty(buildroot)) kprintf("need -r o/$(MODE)"), exit(1);
}
const char *StripExt(const char *s) {
static bool once;
static size_t i, n;
static char *p, *dot;
if (!once) {
once = true;
__cxa_atexit(free_s, &p, NULL);
}
i = 0;
CONCAT(&p, &i, &n, s, strlen(s) + 1);
dot = strrchr(p, '.');
const char *StripExt(char pathbuf[PATH_MAX], const char *s) {
static char *dot;
strcpy(pathbuf, s);
dot = strrchr(pathbuf, '.');
if (dot) *dot = '\0';
return p;
return pathbuf;
}
bool IsObjectSource(const char *name) {
@ -329,16 +369,6 @@ forceinline bool Bts(uint32_t *p, size_t i) {
return false;
}
void Dive(unsigned id) {
int i;
for (i = FindFirstFromEdge(id); i < edges.i && edges.p[i].from == id; ++i) {
if (Bts(visited, edges.p[i].to)) continue;
appendw(&bout, READ32LE(" \\\n\t"));
appends(&bout, strings.p + sauces[edges.p[i].to].name);
Dive(edges.p[i].to);
}
}
size_t GetFileSizeOrZero(const char *path) {
struct stat st;
st.st_size = 0;
@ -346,66 +376,100 @@ size_t GetFileSizeOrZero(const char *path) {
return st.st_size;
}
/* prevents gnu make from restarting unless necessary */
bool HasSameContent(void) {
bool r;
int fd;
char *m;
size_t s;
s = GetFileSizeOrZero(out);
if (s == appendz(bout).i) {
if (s) {
CHECK_NE(-1, (fd = open(out, O_RDONLY)), "open(%#s)", out);
CHECK_NE(MAP_FAILED, (m = mmap(0, s, PROT_READ, MAP_SHARED, fd, 0)));
r = !bcmp(bout, m, s);
munmap(m, s);
close(fd);
} else {
r = true;
}
} else {
r = false;
void Dive(char **bout, uint32_t *visited, unsigned id) {
int i;
for (i = FindFirstFromEdge(id); i < edges.i && edges.p[i].from == id; ++i) {
if (Bts(visited, edges.p[i].to)) continue;
appendw(bout, READ32LE(" \\\n\t"));
appends(bout, strings.p + sauces[edges.p[i].to].name);
Dive(bout, visited, edges.p[i].to);
}
return r;
}
int main(int argc, char *argv[]) {
int fd;
int Diver(void *arg) {
char *bout = 0;
const char *path;
uint32_t *visited;
size_t i, visilen;
if (argc == 2 && !strcmp(argv[1], "-n")) exit(0);
out = "/dev/stdout";
GetOpts(argc, argv);
LoadRelationships(argc, argv);
Crunch();
char pathbuf[PATH_MAX];
int tid = (intptr_t)arg;
visilen = (sources.i + sizeof(*visited) * CHAR_BIT - 1) /
(sizeof(*visited) * CHAR_BIT);
visited = malloc(visilen * sizeof(*visited));
for (i = 0; i < sources.i; ++i) {
for (i = tid; i < sources.i; i += threads) {
path = strings.p + sauces[i].name;
if (!IsObjectSource(path)) continue;
appendw(&bout, '\n');
if (!startswith(path, "o/")) {
appends(&bout, buildroot);
}
appends(&bout, StripExt(path));
appends(&bout, StripExt(pathbuf, path));
appendw(&bout, READ64LE(".o: \\\n\t"));
appends(&bout, path);
bzero(visited, visilen * sizeof(*visited));
Bts(visited, i);
Dive(i);
Dive(&bout, visited, i);
appendw(&bout, '\n');
}
/* if (!fileexists(out) || !HasSameContent()) { */
CHECK_NE(-1, (fd = open(out, O_CREAT | O_WRONLY, 0644)), "open(%#s)", out);
CHECK_NE(-1, ftruncate(fd, appendz(bout).i));
CHECK_NE(-1, xwrite(fd, bout, appendz(bout).i));
CHECK_NE(-1, close(fd));
/* } */
free(strings.p);
free(edges.p);
free(visited);
free(sauces);
free(bout);
appendw(&bout, '\n');
bouts[tid] = bout;
return 0;
}
void Explore(void) {
int i;
for (i = 0; i < threads; ++i) {
if (clone(Diver, stack[i], GetStackSize(),
CLONE_THREAD | CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
CLONE_SETTLS | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID,
(void *)(intptr_t)i, 0, __initialize_tls(tls[i]), 64,
(int *)(tls[i] + 0x38)) == -1) {
_spinlock(&reportlock);
kprintf("error: clone(%d) failed %m\n", i);
exit(1);
}
}
for (i = 0; i < threads; ++i) {
_spinlock((int *)(tls[i] + 0x38));
}
}
int main(int argc, char *argv[]) {
int i, fd;
if (argc == 2 && !strcmp(argv[1], "-n")) exit(0);
out = "/dev/stdout";
GetOpts(argc, argv);
threads = GetCpuCount();
tls = calloc(threads, sizeof(*tls));
stack = calloc(threads, sizeof(*stack));
bouts = calloc(threads, sizeof(*bouts));
for (i = 0; i < threads; ++i) {
if (!(tls[i] = malloc(64)) ||
(stack[i] = mmap(0, GetStackSize(), PROT_READ | PROT_WRITE,
MAP_STACK | MAP_ANONYMOUS, -1, 0)) == MAP_FAILED) {
kprintf("error: mmap(%d) failed %m\n", i);
exit(1);
}
}
LoadRelationships(argc, argv);
Crunch();
Explore();
CHECK_NE(-1, (fd = open(out, O_CREAT | O_WRONLY, 0644)), "open(%#s)", out);
for (i = 0; i < threads; ++i) {
CHECK_NE(-1, xwrite(fd, bouts[i], appendz(bouts[i]).i));
}
CHECK_NE(-1, close(fd));
for (i = 0; i < threads; ++i) {
munmap(stack[i], GetStackSize());
free(bouts[i]);
free(tls[i]);
}
free(strings.p);
free(edges.p);
free(sauces);
free(stack);
free(bouts);
free(tls);
return 0;
}