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cgen,pref: support `-profile-fns strings__new_builder,i64_str -profile -`

pull/13290/head
Delyan Angelov 2022-01-26 19:52:08 +02:00
parent 65a97a9fbe
commit 3fa9128716
No known key found for this signature in database
GPG Key ID: 66886C0F12D595ED
7 changed files with 184 additions and 86 deletions
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17
cmd/v/help/build.txt
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@ -85,6 +85,9 @@ NB: the build flags are shared with the run command too:
c) an average for each function (i.e. (b) / (a) )
d) the function name
NB: the profiler is *NOT* currently thread safe, so look at the profile results of
multithreaded programs very sceptically !
NB: if you want to output the profile info to stdout, use `-profile -`.
NB: you can use `import v.profile`, and then calls to `profile.on(false)`
@ -94,6 +97,20 @@ NB: the build flags are shared with the run command too:
program's `fn main()` starts, pass `-d no_profile_startup` too.
(V constants, and module init() functions are evaluated before `main()` is called)
NB: You can also select specific functions for profiling. For example:
v -profile-fns println,i64_str -profile - run examples/hanoi.v
In this case, the profile counters will be updated only for them, *and* for the functions that they call.
The profile result (after the program finishes), will look similar to this:
127 0.721ms 5680ns println
127 0.693ms 5456ns _writeln_to_fd
127 0.565ms 4449ns _write_buf_to_fd
127 0.045ms 353ns _v_malloc
127 0.017ms 131ns malloc_noscan
127 0.017ms 133ns _v_free
127 0.014ms 113ns vmemmove
127 0.110ms 866ns i64_str
127 0.016ms 127ns tos
-message-limit <limit>
The maximum amount of warnings / errors / notices, that will be accumulated (defaults to 100).
The checker will abort prematurely once this limit has been reached.

7
vlib/v/gen/c/cmain.v
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@ -96,9 +96,16 @@ fn (mut g Gen) gen_c_main_header() {
if g.pref.is_livemain {
g.generate_hotcode_reloading_main_caller()
}
if g.pref.profile_file != '' {
if 'no_profile_startup' in g.pref.compile_defines {
g.writeln('vreset_profile_stats();')
}
if g.pref.profile_fns.len > 0 {
g.writeln('vreset_profile_stats();')
// v__profile_enabled will be set true *inside* the fns in g.pref.profile_fns:
g.writeln('v__profile_enabled = false;')
}
}
}
pub fn (mut g Gen) gen_c_main_footer() {

79
vlib/v/gen/c/fn.v
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@ -210,45 +210,9 @@ fn (mut g Gen) gen_fn_decl(node &ast.FnDecl, skip bool) {
eprintln('INFO: compile with `v -live $g.pref.path `, if you want to use the [live] function $node.name .')
}
//
mut name := node.name
if name in ['+', '-', '*', '/', '%', '<', '=='] {
name = util.replace_op(name)
}
if node.is_method {
unwrapped_rec_sym := g.table.sym(g.unwrap_generic(node.receiver.typ))
if unwrapped_rec_sym.kind == .placeholder {
return
}
name = g.cc_type(node.receiver.typ, false) + '_' + name
// name = g.table.sym(node.receiver.typ).name + '_' + name
}
if node.language == .c {
name = util.no_dots(name)
} else {
name = c_name(name)
}
mut name := g.c_fn_name(node) or { return }
mut type_name := g.typ(node.return_type)
if node.generic_names.len > 0 {
name = g.generic_fn_name(g.cur_concrete_types, name, true)
}
if g.pref.translated && node.attrs.contains('c') {
// This fixes unknown symbols errors when building separate .c => .v files
// into .o files
//
// example:
// [c: 'P_TryMove']
// fn p_trymove(thing &Mobj_t, x int, y int) bool
//
// =>
//
// bool P_TryMove(main__Mobj_t* thing, int x, int y);
//
// In fn_call every time `p_trymove` is called, `P_TryMove` will be generated instead.
name = node.attrs[0].arg
}
if g.pref.obfuscate && g.cur_mod.name == 'main' && name.starts_with('main__') && !node.is_main
&& node.name != 'str' {
mut key := node.name
@ -449,6 +413,47 @@ fn (mut g Gen) gen_fn_decl(node &ast.FnDecl, skip bool) {
}
}
fn (mut g Gen) c_fn_name(node &ast.FnDecl) ?string {
mut name := node.name
if name in ['+', '-', '*', '/', '%', '<', '=='] {
name = util.replace_op(name)
}
if node.is_method {
unwrapped_rec_sym := g.table.sym(g.unwrap_generic(node.receiver.typ))
if unwrapped_rec_sym.kind == .placeholder {
return none
}
name = g.cc_type(node.receiver.typ, false) + '_' + name
// name = g.table.sym(node.receiver.typ).name + '_' + name
}
if node.language == .c {
name = util.no_dots(name)
} else {
name = c_name(name)
}
if node.generic_names.len > 0 {
name = g.generic_fn_name(g.cur_concrete_types, name, true)
}
if g.pref.translated && node.attrs.contains('c') {
// This fixes unknown symbols errors when building separate .c => .v files
// into .o files
//
// example:
// [c: 'P_TryMove']
// fn p_trymove(thing &Mobj_t, x int, y int) bool
//
// =>
//
// bool P_TryMove(main__Mobj_t* thing, int x, int y);
//
// In fn_call every time `p_trymove` is called, `P_TryMove` will be generated instead.
name = node.attrs[0].arg
}
return name
}
const closure_ctx = '_V_closure_ctx'
fn closure_ctx_struct(node ast.FnDecl) string {

17
vlib/v/gen/c/profile.v
View File

@ -14,20 +14,33 @@ fn (mut g Gen) profile_fn(fn_decl ast.FnDecl) {
return
}
fn_name := fn_decl.name
cfn_name := g.last_fn_c_name
if fn_name.starts_with('time.vpc_now') || fn_name.starts_with('v.profile.') {
g.defer_profile_code = ''
} else {
measure_fn_name := if g.pref.os == .macos { 'time__vpc_now_darwin' } else { 'time__vpc_now' }
fn_profile_counter_name := 'vpc_$g.last_fn_c_name'
fn_profile_counter_name := 'vpc_$cfn_name'
fn_profile_counter_name_calls := '${fn_profile_counter_name}_calls'
g.writeln('')
should_restore_v__profile_enabled := g.pref.profile_fns.len > 0
&& cfn_name in g.pref.profile_fns
if should_restore_v__profile_enabled {
$if trace_profile_fns ? {
eprintln('> profile_fn | $g.pref.profile_fns | $cfn_name')
}
g.writeln('\tbool _prev_v__profile_enabled = v__profile_enabled;')
g.writeln('\tv__profile_enabled = true;')
}
g.writeln('\tdouble _PROF_FN_START = ${measure_fn_name}();')
g.writeln('\tif(v__profile_enabled) { $fn_profile_counter_name_calls++; } // $fn_name')
g.writeln('')
g.defer_profile_code = '\tif(v__profile_enabled) { $fn_profile_counter_name += ${measure_fn_name}() - _PROF_FN_START; }'
if should_restore_v__profile_enabled {
g.defer_profile_code += '\n\t\tv__profile_enabled = _prev_v__profile_enabled;'
}
g.pcs_declarations.writeln('double $fn_profile_counter_name = 0.0; u64 $fn_profile_counter_name_calls = 0;')
g.pcs << ProfileCounterMeta{
fn_name: g.last_fn_c_name
fn_name: cfn_name
vpc_name: fn_profile_counter_name
vpc_calls: fn_profile_counter_name_calls
}

8
vlib/v/pref/pref.v
View File

@ -110,6 +110,7 @@ pub mut:
test_runner string // can be 'simple' (fastest, but much less detailed), 'tap', 'normal'
profile_file string // the profile results will be stored inside profile_file
profile_no_inline bool // when true, [inline] functions would not be profiled
profile_fns []string // when set, profiling will be off by default, but inside these functions (and what they call) it will be on.
translated bool // `v translate doom.v` are we running V code translated from C? allow globals, ++ expressions, etc
is_prod bool // use "-O2"
obfuscate bool // `v -obf program.v`, renames functions to "f_XXX"
@ -424,6 +425,13 @@ pub fn parse_args_and_show_errors(known_external_commands []string, args []strin
res.build_options << '$arg $res.profile_file'
i++
}
'-profile-fns' {
profile_fns := cmdline.option(current_args, arg, '').split(',')
if profile_fns.len > 0 {
res.profile_fns << profile_fns
}
i++
}
'-profile-no-inline' {
res.profile_no_inline = true
}

94
vlib/v/tests/profile/profile_test.v
View File

@ -10,40 +10,74 @@ fn test_vexe_exists() {
}
fn test_v_profile_works() {
os.chdir(vroot) or {}
program_source := os.join_path(vroot, 'vlib/v/tests/profile/profile_test_1.v')
res := os.execute('${os.quoted_path(vexe)} -profile - run ${os.quoted_path(program_source)}')
// eprintln('res: $res')
assert res.exit_code == 0
assert res.output.len > 0
assert res.output.contains(' os__init_os_args')
assert res.output.contains(' main__main')
assert res.output.contains(' println')
assert res.output.contains(' strconv__atoi')
sfile := 'vlib/v/tests/profile/profile_test_1.v'
validate_output(@FN, '', sfile, {
'os__init_os_args': 1
'main__main': 1
'println': 1
'strconv__atoi': 1
})
}
fn test_v_profile_on_off_api_works() {
os.chdir(vroot) or {}
program_source := os.join_path(vroot, 'vlib/v/tests/profile/profile_test_2.v')
res := os.execute('${os.quoted_path(vexe)} -profile - run ${os.quoted_path(program_source)}')
// eprintln('res: $res')
assert res.exit_code == 0
assert res.output.len > 0
assert res.output.contains(' builtin_init')
assert res.output.contains(' main__main')
assert res.output.contains(' main__abc')
res_lines := res.output.split_into_lines()
abc_count := res_lines.filter(it.contains('main__abc'))[0].trim_space().all_before(' ').int()
assert abc_count == 1
sfile := 'vlib/v/tests/profile/profile_test_2.v'
res_lines := validate_output(@FN, '', sfile, {
'builtin_init': 1
'main__main': 1
'main__abc': 1
})
// test that `-d no_profile_startup` *also* works:
res2 := os.execute('${os.quoted_path(vexe)} -d no_profile_startup -profile - run ${os.quoted_path(program_source)}')
assert res2.exit_code == 0
assert res2.output.len > 0
assert !res2.output.contains(' builtin_init')
assert res2.output.contains(' main__main')
assert res2.output.contains(' main__abc')
res2_lines := res2.output.split_into_lines()
res2_lines := validate_output(@FN, '-d no_profile_startup', sfile, {
'builtin_init': -1
'main__main': 1
'main__abc': 1
})
assert res_lines.len > res2_lines.len
// dump(res2_lines)
}
fn test_v_profile_fns_option_works() {
sfile := 'vlib/v/tests/profile/profile_test_3.v'
validate_output(@FN, '-profile-fns println', sfile, {
'main__main': -1
'main__abc': -1
'main__xyz': -1
'println': 10
})
validate_output(@FN, '-profile-fns main__abc', sfile, {
'main__main': -1
'main__abc': 1
'main__xyz': 2
'println': 10
})
validate_output(@FN, '-profile-fns main__xyz', sfile, {
'main__main': -1
'main__abc': -1
'main__xyz': 2
'println': 10
})
}
fn counter_value(lines []string, what string) int {
res := lines.filter(it.contains(what))
if res.len == 0 {
return -1
}
return res[0].trim_space().all_before(' ').int()
}
fn validate_output(fn_name string, vopts string, fsource string, expected map[string]int) []string {
println('> validating $fn_name with: `v $vopts -profile - run $fsource`')
os.chdir(vroot) or {}
program_source := os.join_path(vroot, fsource)
res := os.execute('${os.quoted_path(vexe)} $vopts -profile - run ${os.quoted_path(program_source)}')
assert res.exit_code == 0
assert res.output.len > 0
res_lines := res.output.split_into_lines()
for expected_counter_name, expected_counter_value in expected {
produced_value := counter_value(res_lines, expected_counter_name)
println(' counter_name: $expected_counter_name')
assert produced_value == expected_counter_value
}
return res_lines
}

14
vlib/v/tests/profile/profile_test_3.v 100644
View File

@ -0,0 +1,14 @@
fn xyz() {
for i in 0 .. 5 {
println('${@FN} - i: $i')
}
}
fn abc() {
xyz()
xyz()
}
fn main() {
abc()
}