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Reworked out the OPFS async proxy metrics are fetched so that they play more nicely with the tight event-polling loop.

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FossilOrigin-Name: ef503ced5c2ca842be9aea9ef13719a378ed3020e884032db09afee1b8eba0a1
This commit is contained in:
stephan
2022-09-24 10:12:19 +00:00
parent 60d9aa7c59
commit 56fae744d4
4 changed files with 86 additions and 59 deletions
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66
ext/wasm/api/sqlite3-api-opfs.js
View File

@ -142,7 +142,8 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
"metrics for",self.location.href,":",metrics, "metrics for",self.location.href,":",metrics,
"\nTotal of",n,"op(s) for",t, "\nTotal of",n,"op(s) for",t,
"ms (incl. "+w+" ms of waiting on the async side)"); "ms (incl. "+w+" ms of waiting on the async side)");
console.log("Serialization metrics:",JSON.stringify(metrics.s11n,0,2)); console.log("Serialization metrics:",metrics.s11n);
opRun('async-metrics');
}, },
reset: function(){ reset: function(){
let k; let k;
@ -160,7 +161,17 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
//].forEach((k)=>r(metrics[k] = Object.create(null))); //].forEach((k)=>r(metrics[k] = Object.create(null)));
} }
}/*metrics*/; }/*metrics*/;
const promiseReject = function(err){
opfsVfs.dispose();
return promiseReject_(err);
};
const W = new Worker(options.proxyUri);
W._originalOnError = W.onerror /* will be restored later */;
W.onerror = function(err){
// The error object doesn't contain any useful info when the
// failure is, e.g., that the remote script is 404.
promiseReject(new Error("Loading OPFS async Worker failed for unknown reasons."));
};
const pDVfs = capi.sqlite3_vfs_find(null)/*pointer to default VFS*/; const pDVfs = capi.sqlite3_vfs_find(null)/*pointer to default VFS*/;
const dVfs = pDVfs const dVfs = pDVfs
? new sqlite3_vfs(pDVfs) ? new sqlite3_vfs(pDVfs)
@ -193,18 +204,6 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
gets called at all in a wasm build, which is undefined). gets called at all in a wasm build, which is undefined).
*/ */
const promiseReject = function(err){
opfsVfs.dispose();
return promiseReject_(err);
};
const W = new Worker(options.proxyUri);
W._originalOnError = W.onerror /* will be restored later */;
W.onerror = function(err){
// The error object doesn't contain any useful info when the
// failure is, e.g., that the remote script is 404.
promiseReject(new Error("Loading OPFS async Worker failed for unknown reasons."));
};
/** /**
State which we send to the async-api Worker or share with it. State which we send to the async-api Worker or share with it.
This object must initially contain only cloneable or sharable This object must initially contain only cloneable or sharable
@ -227,11 +226,19 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
const state = Object.create(null); const state = Object.create(null);
state.verbose = options.verbose; state.verbose = options.verbose;
state.littleEndian = true; state.littleEndian = true;
/** If true, the async counterpart should log exceptions to /** Whether the async counterpart should log exceptions to
the serialization channel. That produces a great deal of the serialization channel. That produces a great deal of
noise for seemingly innocuous things like xAccess() checks noise for seemingly innocuous things like xAccess() checks
for missing files. */ for missing files, so this option may have one of 3 values:
state.asyncS11nExceptions = false;
0 = no exception logging
1 = only log exceptions for "significant" ops like xOpen(),
xRead(), and xWrite().
2 = log all exceptions.
*/
state.asyncS11nExceptions = 1;
/* Size of file I/O buffer block. 64k = max sqlite3 page size. */ /* Size of file I/O buffer block. 64k = max sqlite3 page size. */
state.fileBufferSize = state.fileBufferSize =
1024 * 64; 1024 * 64;
@ -270,6 +277,7 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
state.opIds.xClose = i++; state.opIds.xClose = i++;
state.opIds.xDelete = i++; state.opIds.xDelete = i++;
state.opIds.xDeleteNoWait = i++; state.opIds.xDeleteNoWait = i++;
state.opIds.xFileControl = i++;
state.opIds.xFileSize = i++; state.opIds.xFileSize = i++;
state.opIds.xOpen = i++; state.opIds.xOpen = i++;
state.opIds.xRead = i++; state.opIds.xRead = i++;
@ -278,7 +286,7 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
state.opIds.xTruncate = i++; state.opIds.xTruncate = i++;
state.opIds.xWrite = i++; state.opIds.xWrite = i++;
state.opIds.mkdir = i++; state.opIds.mkdir = i++;
state.opIds.xFileControl = i++; state.opIds['async-metrics'] = i++;
state.sabOP = new SharedArrayBuffer(i * 4/*sizeof int32*/); state.sabOP = new SharedArrayBuffer(i * 4/*sizeof int32*/);
opfsUtil.metrics.reset(); opfsUtil.metrics.reset();
} }
@ -857,6 +865,27 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
defaulting to 16. defaulting to 16.
*/ */
opfsUtil.randomFilename = randomFilename; opfsUtil.randomFilename = randomFilename;
/**
Re-registers the OPFS VFS. This is intended only for odd use
cases which have to call sqlite3_shutdown() as part of their
initialization process, which will unregister the VFS
registered by installOpfsVfs(). If passed a truthy value, the
OPFS VFS is registered as the default VFS, else it is not made
the default. Returns the result of the the
sqlite3_vfs_register() call.
Design note: the problem of having to re-register things after
a shutdown/initialize pair is more general. How to best plug
that in to the library is unclear. In particular, we cannot
hook in to any C-side calls to sqlite3_initialize(), so we
cannot add an after-initialize callback mechanism.
*/
opfsUtil.reregisterVfs = (asDefault=false)=>{
return capi.wasm.exports.sqlite3_vfs_register(
opfsVfs.pointer, asDefault ? 1 : 0
);
};
if(sqlite3.oo1){ if(sqlite3.oo1){
opfsUtil.OpfsDb = function(...args){ opfsUtil.OpfsDb = function(...args){
@ -940,7 +969,6 @@ sqlite3.installOpfsVfs = function callee(asyncProxyUri = callee.defaultProxyUri)
wasm.scopedAllocPop(scope); wasm.scopedAllocPop(scope);
} }
}/*sanityCheck()*/; }/*sanityCheck()*/;
W.onmessage = function({data}){ W.onmessage = function({data}){
//log("Worker.onmessage:",data); //log("Worker.onmessage:",data);

63
ext/wasm/sqlite3-opfs-async-proxy.js
View File

@ -84,11 +84,10 @@ metrics.dump = ()=>{
} }
console.log(self.location.href, console.log(self.location.href,
"metrics for",self.location.href,":\n", "metrics for",self.location.href,":\n",
JSON.stringify(metrics,0,2) metrics,
/*dev console can't expand this object!*/,
"\nTotal of",n,"op(s) for",t,"ms", "\nTotal of",n,"op(s) for",t,"ms",
"approx",w,"ms spent waiting on OPFS APIs."); "approx",w,"ms spent waiting on OPFS APIs.");
console.log("Serialization metrics:",JSON.stringify(metrics.s11n,0,2)); console.log("Serialization metrics:",metrics.s11n);
}; };
warn("This file is very much experimental and under construction.", warn("This file is very much experimental and under construction.",
@ -122,7 +121,7 @@ const getResolvedPath = function(filename,splitIt){
truthy then each directory element leading to the file is created truthy then each directory element leading to the file is created
along the way. Throws if any creation or resolution fails. along the way. Throws if any creation or resolution fails.
*/ */
const getDirForPath = async function f(absFilename, createDirs = false){ const getDirForFilename = async function f(absFilename, createDirs = false){
const path = getResolvedPath(absFilename, true); const path = getResolvedPath(absFilename, true);
const filename = path.pop(); const filename = path.pop();
let dh = state.rootDir; let dh = state.rootDir;
@ -183,14 +182,20 @@ const wTimeEnd = ()=>(
to simplify finding them. to simplify finding them.
*/ */
const vfsAsyncImpls = { const vfsAsyncImpls = {
mkdir: async function(dirname){ 'async-metrics': async ()=>{
mTimeStart('async-metrics');
metrics.dump();
storeAndNotify('async-metrics', 0);
mTimeEnd();
},
mkdir: async (dirname)=>{
mTimeStart('mkdir'); mTimeStart('mkdir');
let rc = 0; let rc = 0;
wTimeStart('mkdir'); wTimeStart('mkdir');
try { try {
await getDirForPath(dirname+"/filepart", true); await getDirForFilename(dirname+"/filepart", true);
}catch(e){ }catch(e){
state.s11n.storeException(e); state.s11n.storeException(2,e);
rc = state.sq3Codes.SQLITE_IOERR; rc = state.sq3Codes.SQLITE_IOERR;
}finally{ }finally{
wTimeEnd(); wTimeEnd();
@ -198,7 +203,7 @@ const vfsAsyncImpls = {
storeAndNotify('mkdir', rc); storeAndNotify('mkdir', rc);
mTimeEnd(); mTimeEnd();
}, },
xAccess: async function(filename){ xAccess: async (filename)=>{
mTimeStart('xAccess'); mTimeStart('xAccess');
/* OPFS cannot support the full range of xAccess() queries sqlite3 /* OPFS cannot support the full range of xAccess() queries sqlite3
calls for. We can essentially just tell if the file is calls for. We can essentially just tell if the file is
@ -214,10 +219,10 @@ const vfsAsyncImpls = {
let rc = 0; let rc = 0;
wTimeStart('xAccess'); wTimeStart('xAccess');
try{ try{
const [dh, fn] = await getDirForPath(filename); const [dh, fn] = await getDirForFilename(filename);
await dh.getFileHandle(fn); await dh.getFileHandle(fn);
}catch(e){ }catch(e){
state.s11n.storeException(e); state.s11n.storeException(2,e);
rc = state.sq3Codes.SQLITE_IOERR; rc = state.sq3Codes.SQLITE_IOERR;
}finally{ }finally{
wTimeEnd(); wTimeEnd();
@ -269,7 +274,7 @@ const vfsAsyncImpls = {
wTimeStart('xDelete'); wTimeStart('xDelete');
try { try {
while(filename){ while(filename){
const [hDir, filenamePart] = await getDirForPath(filename, false); const [hDir, filenamePart] = await getDirForFilename(filename, false);
if(!filenamePart) break; if(!filenamePart) break;
await hDir.removeEntry(filenamePart, {recursive}); await hDir.removeEntry(filenamePart, {recursive});
if(0x1234 !== syncDir) break; if(0x1234 !== syncDir) break;
@ -278,7 +283,7 @@ const vfsAsyncImpls = {
filename = filename.join('/'); filename = filename.join('/');
} }
}catch(e){ }catch(e){
state.s11n.storeException(e); state.s11n.storeException(2,e);
rc = state.sq3Codes.SQLITE_IOERR_DELETE; rc = state.sq3Codes.SQLITE_IOERR_DELETE;
} }
wTimeEnd(); wTimeEnd();
@ -294,7 +299,7 @@ const vfsAsyncImpls = {
state.s11n.serialize(Number(sz)); state.s11n.serialize(Number(sz));
sz = 0; sz = 0;
}catch(e){ }catch(e){
state.s11n.storeException(e); state.s11n.storeException(2,e);
sz = state.sq3Codes.SQLITE_IOERR; sz = state.sq3Codes.SQLITE_IOERR;
} }
wTimeEnd(); wTimeEnd();
@ -310,7 +315,7 @@ const vfsAsyncImpls = {
try{ try{
let hDir, filenamePart; let hDir, filenamePart;
try { try {
[hDir, filenamePart] = await getDirForPath(filename, !!create); [hDir, filenamePart] = await getDirForFilename(filename, !!create);
}catch(e){ }catch(e){
storeAndNotify(opName, state.sql3Codes.SQLITE_NOTFOUND); storeAndNotify(opName, state.sql3Codes.SQLITE_NOTFOUND);
mTimeEnd(); mTimeEnd();
@ -339,7 +344,7 @@ const vfsAsyncImpls = {
}catch(e){ }catch(e){
wTimeEnd(); wTimeEnd();
error(opName,e); error(opName,e);
state.s11n.storeException(e); state.s11n.storeException(1,e);
storeAndNotify(opName, state.sq3Codes.SQLITE_IOERR); storeAndNotify(opName, state.sq3Codes.SQLITE_IOERR);
} }
mTimeEnd(); mTimeEnd();
@ -361,7 +366,7 @@ const vfsAsyncImpls = {
} }
}catch(e){ }catch(e){
error("xRead() failed",e,fh); error("xRead() failed",e,fh);
state.s11n.storeException(e); state.s11n.storeException(1,e);
rc = state.sq3Codes.SQLITE_IOERR_READ; rc = state.sq3Codes.SQLITE_IOERR_READ;
} }
storeAndNotify('xRead',rc); storeAndNotify('xRead',rc);
@ -376,7 +381,7 @@ const vfsAsyncImpls = {
wTimeStart('xSync'); wTimeStart('xSync');
await fh.accessHandle.flush(); await fh.accessHandle.flush();
}catch(e){ }catch(e){
state.s11n.storeException(e); state.s11n.storeException(2,e);
}finally{ }finally{
wTimeEnd(); wTimeEnd();
} }
@ -394,7 +399,7 @@ const vfsAsyncImpls = {
await fh.accessHandle.truncate(size); await fh.accessHandle.truncate(size);
}catch(e){ }catch(e){
error("xTruncate():",e,fh); error("xTruncate():",e,fh);
state.s11n.storeException(e); state.s11n.storeException(2,e);
rc = state.sq3Codes.SQLITE_IOERR_TRUNCATE; rc = state.sq3Codes.SQLITE_IOERR_TRUNCATE;
} }
wTimeEnd(); wTimeEnd();
@ -414,7 +419,7 @@ const vfsAsyncImpls = {
) ? 0 : state.sq3Codes.SQLITE_IOERR_WRITE; ) ? 0 : state.sq3Codes.SQLITE_IOERR_WRITE;
}catch(e){ }catch(e){
error("xWrite():",e,fh); error("xWrite():",e,fh);
state.s11n.storeException(e); state.s11n.storeException(1,e);
rc = state.sq3Codes.SQLITE_IOERR_WRITE; rc = state.sq3Codes.SQLITE_IOERR_WRITE;
}finally{ }finally{
wTimeEnd(); wTimeEnd();
@ -519,7 +524,11 @@ const initS11n = ()=>{
}; };
state.s11n.storeException = state.asyncS11nExceptions state.s11n.storeException = state.asyncS11nExceptions
? ((e)=>state.s11n.serialize(e.message)) ? ((priority,e)=>{
if(priority<=state.asyncS11nExceptions){
state.s11n.serialize(e.message);
}
})
: ()=>{}; : ()=>{};
return state.s11n; return state.s11n;
@ -533,10 +542,8 @@ const waitLoop = async function f(){
const o = Object.create(null); const o = Object.create(null);
opHandlers[state.opIds[k]] = o; opHandlers[state.opIds[k]] = o;
o.key = k; o.key = k;
o.f = vi;// || toss("No vfsAsyncImpls[",k,"]"); o.f = vi || toss("No vfsAsyncImpls[",k,"]");
} }
let metricsTimer = self.location.port>=1024 ? performance.now() : 0;
// ^^^ in dev environment, dump out these metrics one time after a delay.
while(true){ while(true){
try { try {
if('timed-out'===Atomics.wait(state.sabOPView, state.opIds.whichOp, 0, 500)){ if('timed-out'===Atomics.wait(state.sabOPView, state.opIds.whichOp, 0, 500)){
@ -545,7 +552,7 @@ const waitLoop = async function f(){
const opId = Atomics.load(state.sabOPView, state.opIds.whichOp); const opId = Atomics.load(state.sabOPView, state.opIds.whichOp);
Atomics.store(state.sabOPView, state.opIds.whichOp, 0); Atomics.store(state.sabOPView, state.opIds.whichOp, 0);
const hnd = opHandlers[opId] ?? toss("No waitLoop handler for whichOp #",opId); const hnd = opHandlers[opId] ?? toss("No waitLoop handler for whichOp #",opId);
const args = state.s11n.deserialize(); const args = state.s11n.deserialize() || [];
state.s11n.serialize()/* clear s11n to keep the caller from state.s11n.serialize()/* clear s11n to keep the caller from
confusing this with an exception string confusing this with an exception string
written by the upcoming operation */; written by the upcoming operation */;
@ -554,14 +561,6 @@ const waitLoop = async function f(){
else error("Missing callback for opId",opId); else error("Missing callback for opId",opId);
}catch(e){ }catch(e){
error('in waitLoop():',e.message); error('in waitLoop():',e.message);
}finally{
// We can't call metrics.dump() from the dev console because this
// thread is continually tied up in Atomics.wait(), so let's
// do, for dev purposes only, a dump one time after 60 seconds.
if(metricsTimer && (performance.now() > metricsTimer + 60000)){
metrics.dump();
metricsTimer = 0;
}
} }
}; };
}; };

14
manifest
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@ -1,5 +1,5 @@
C Refactoring\stowards\sgetting\sfiddle\sto\ssupport\sOPFS\sas\sa\sfirst-class\scitizen.\sCertain\soperations,\se.g.\simport,\sexport,\sand\sunlink,\sare\snot\sOPFS-aware. C Reworked\sout\sthe\sOPFS\sasync\sproxy\smetrics\sare\sfetched\sso\sthat\sthey\splay\smore\snicely\swith\sthe\stight\sevent-polling\sloop.
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# Remove this line to create a well-formed Fossil manifest. # Remove this line to create a well-formed Fossil manifest.

2
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