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Message 6170 - Posted: 13 Apr 2020, 17:18:05 UTC - in response to Message 6169.
Last modified: 13 Apr 2020, 17:20:53 UTC

The checkpoint is generated from mfakto with the name: M97983883.ckp


yes but the wrapper cannot readout it or save the time or Iam wrong, never checked the new wrapper code, if you restart BOINC the stderr.txt must keep the last savepoint.

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Message 6171 - Posted: 13 Apr 2020, 17:43:48 UTC - in response to Message 6170.
Last modified: 13 Apr 2020, 17:44:16 UTC

In this case the file M97983883.ckp keeps the checkpoint:

97983883 77 78 4620 mfakto 0.15pre6: 17 0 B624ABF0
97983883 77 78 4620 mfakto 0.15pre6: 45 0 150D244C
97983883 77 78 4620 mfakto 0.15pre6: 72 0 7071D1B7
97983883 77 78 4620 mfakto 0.15pre6: 93 0 48AC81E6
97983883 77 78 4620 mfakto 0.15pre6: 116 0 9EC681F1

So the estimated runtime is 9:50 hours.
But the name M97983883.ckp is different for each test.

...we need a few additional lines of code in the wrapper, so that it can handle the .ckp file.

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Message 6172 - Posted: 13 Apr 2020, 17:45:21 UTC - in response to Message 6171.

In this case the file M97983883.ckp keeps the checkpoint:

97983883 77 78 4620 mfakto 0.15pre6: 17 0 B624ABF0
97983883 77 78 4620 mfakto 0.15pre6: 45 0 150D244C
97983883 77 78 4620 mfakto 0.15pre6: 72 0 7071D1B7
97983883 77 78 4620 mfakto 0.15pre6: 93 0 48AC81E6
97983883 77 78 4620 mfakto 0.15pre6: 116 0 9EC681F1

So the estimated runtime is 9:50 hours.
But the name M97983883.ckp is different for each test.

...we need a few additional lines of code in the wrapper, so that it can handle the .ckp file.


The old wrapper code is here

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Message 6173 - Posted: 13 Apr 2020, 17:53:58 UTC - in response to Message 6171.
Last modified: 13 Apr 2020, 17:54:40 UTC

I added a second PC to this test, and it runs too (had to reset the project).

The good news:
Two tests are running, one with Ubuntu 18.04, the other with Opensuse 15.1.
One with driver 20.10 (Radeon 5500XT), the other with driver 19.50 (R9 380)
One will need about 10 hours, the other will need 27 hours.

The bad news:
You have to wait with 100% until it's finished, or you have to extend the wrapper.

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Message 6174 - Posted: 13 Apr 2020, 18:58:07 UTC - in response to Message 6172.
Last modified: 13 Apr 2020, 19:08:34 UTC

The old wrapper code is here


Tomorrow (after work) I will try to implement a method in the wrapper that it can deal with the .ckp file.
The ini file should change from CheckpointDelay=300 to CheckpointDelay=60.
(both: NVidia and AMD)

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Message 6175 - Posted: 13 Apr 2020, 19:12:17 UTC - in response to Message 6174.
Last modified: 13 Apr 2020, 19:13:43 UTC

The old wrapper code is here


Tomorrow (after work) I will try to implement a method in the wrapper that it can deal with the .ckp file.
The ini file should change from CheckpointDelay=300 to CheckpointDelay=60.
(both: NVidia and AMD)


every 60s is bad. The old wrapper code can be used for all apps to have checkpointing. Some times ago I have tried it to implement but failed. As far as I know there are only 2 sections of code. We only need to add the old snipped to the latest code.

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Message 6200 - Posted: 14 Apr 2020, 21:23:52 UTC - in response to Message 6175.

Will need another evening. C and characters (strings) are colliding worlds.

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Message 6213 - Posted: 15 Apr 2020, 17:54:43 UTC - in response to Message 6200.
Last modified: 15 Apr 2020, 17:54:59 UTC

A new (test) version of the wrapper (mfakto/mfaktc) is here:
https://p-numbers.net/wrapper_26016_7.16_mfakt

The next test can begin.....

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Message 6214 - Posted: 15 Apr 2020, 18:04:30 UTC - in response to Message 6213.

A new (test) version of the wrapper (mfakto/mfaktc) is here:
https://p-numbers.net/wrapper_26016_7.16_mfakt

The next test can begin.....


Can you test it first standalone? Start wrapper, wait for the checkpoint, close the window, restart the wrapper and check the stderr.txt. Do you have the source code if its working? I could try to build it on windows.

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Message 6215 - Posted: 15 Apr 2020, 18:06:41 UTC - in response to Message 6214.
Last modified: 15 Apr 2020, 18:07:35 UTC

Does the wrapper work without BOINC?
So I create a test dir and copy the files into it?

And yes...you will get the source.

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Message 6216 - Posted: 15 Apr 2020, 18:08:15 UTC - in response to Message 6215.
Last modified: 15 Apr 2020, 18:08:51 UTC

Does the wrapper work without BOINC?
So I create a test dir and copy the files into it?

And yes...you will get the source.


yes its working outside, thats why Iam testing before I setup the apps ;)
Do you have also saved runtime included if you are a c++ specialist?

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Message 6217 - Posted: 15 Apr 2020, 18:19:15 UTC - in response to Message 6216.

20:18:30 (19664): BOINC client no longer exists - exiting
20:18:30 (19664): timer handler: client dead, exiting

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Message 6218 - Posted: 15 Apr 2020, 18:20:47 UTC - in response to Message 6217.
Last modified: 15 Apr 2020, 18:27:36 UTC

20:18:30 (19664): BOINC client no longer exists - exiting
20:18:30 (19664): timer handler: client dead, exiting


ok I will try to setup, lets see how its working in BOINC.

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Message 6219 - Posted: 15 Apr 2020, 18:29:07 UTC

v11 linux app is up with the new wrapper.

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Message 6220 - Posted: 15 Apr 2020, 18:31:49 UTC - in response to Message 6218.

What ending is exe?
The file is named wrapper_26016_7.16_mfakt
It is linux executable (-rwxr-xr-x)

The new method is:

double getMfraction() { FILE* f = fopen("worktodo.txt", "r"); if (!f) return 0; char* p; char buf[256]; p = fgets(buf, 256, f); fclose(f); if (p == NULL) return 0; char * qch; qch = strtok(p, "="); qch = strtok(NULL, ","); int len = strlen(qch); char mfile[6+len]; mfile[0] = 'M'; int i; for (i = 0; i < len; i++) { mfile[1+i] = qch[i]; } mfile[1+len] = '.'; mfile[2+len] = 'c'; mfile[3+len] = 'k'; mfile[4+len] = 'p'; mfile[5+len] = '\0'; FILE* ff = fopen(mfile, "r"); if (!ff) return 0; char* pp; pp = fgets(buf, 256, ff); fclose(ff); if (pp == NULL) return 0; char * pch; int count = 0; double all = 0, done = 0, frac = 0; pch = strtok (pp, " "); while (pch != NULL) { count++; if (count == 4) all = atof(pch); if (count == 7) done = atof(pch); pch = strtok (NULL, " "); } if (all > 0) frac = done / all; if (frac < 0) return 0; if (frac > 1) return 1; return frac; }

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Message 6221 - Posted: 15 Apr 2020, 18:34:56 UTC - in response to Message 6220.
Last modified: 15 Apr 2020, 18:35:53 UTC

What ending is exe?
The file is named wrapper_26016_7.16_mfakt
It is linux executable (-rwxr-xr-x)

The new method is:
double getMfraction() { FILE* f = fopen("worktodo.txt", "r"); if (!f) return 0; char* p; char buf[256]; p = fgets(buf, 256, f); fclose(f); if (p == NULL) return 0; char * qch; qch = strtok(p, "="); qch = strtok(NULL, ","); int len = strlen(qch); char mfile[6+len]; mfile[0] = 'M'; int i; for (i = 0; i < len; i++) { mfile[1+i] = qch[i]; } mfile[1+len] = '.'; mfile[2+len] = 'c'; mfile[3+len] = 'k'; mfile[4+len] = 'p'; mfile[5+len] = '\0'; FILE* ff = fopen(mfile, "r"); if (!ff) return 0; char* pp; pp = fgets(buf, 256, ff); fclose(ff); if (pp == NULL) return 0; char * pch; int count = 0; double all = 0, done = 0, frac = 0; pch = strtok (pp, " "); while (pch != NULL) { count++; if (count == 4) all = atof(pch); if (count == 7) done = atof(pch); pch = strtok (NULL, " "); } if (all > 0) frac = done / all; if (frac < 0) return 0; if (frac > 1) return 1; return frac; }


Sorry, was the test folder. I have removed the text ^^ I have forgot the execute bit again, any issues?

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Message 6222 - Posted: 15 Apr 2020, 18:42:55 UTC

Do you have the complete wrapper.cpp file?

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Message 6223 - Posted: 15 Apr 2020, 18:45:51 UTC - in response to Message 6221.

Sorry to interject your development process.

Why are you using "--device x" for mfakto and mfaktc ?
Both their guides say to use "-d x"

Q: Does mfakto support multiple GPUs?
A: No, but you can use the -d option to tell an instance to run on a specific
device. Please also read the next question.

Q Does mfaktc support multiple GPUs?
A Yes, with the exception that a single instance of mfaktc can only use one
GPU. For each GPU you want to run mfaktc on you need (at least) one
instance of mfaktc. For each instance of mfaktc you can use the
commandline option "-d <GPU number>" to specify which GPU to use for each
specific mfaktc instance. Please read the next question, too.

I can run a second task on a second GPU but only if I specify "-d x", as soon as I pass "--device x" (or "-device x") on the command line it defaults to the first GPU.

Can you use "-d x" for linux wrapper at least please ?

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Message 6224 - Posted: 15 Apr 2020, 18:45:52 UTC - in response to Message 6221.

No issues.
In about an hour an "old" WU is finished, the new WU should use the new wrapper and I can report.

I am not a C/C++ developer. The new method just reads the worktodo.txt with the number and contructs the file name for the checkpoint file of mfaktc/mfakto and calculates the fraction of "work done". This can be used by the method fraction_done() of the (original) wrapper.

If it succeeds I will send you the wrapper.cpp so it can be used for Windows too.

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Message 6225 - Posted: 15 Apr 2020, 18:53:48 UTC - in response to Message 6223.

Theoretical both applicatins can support more than one (different) GPU.
But: BOINC enumerates the GPU with 0, 1, 2, ....
In OpenCl you have platforms, e.g. Intel=0, AMD=1, NVidia=2, and for each platform 1..n devices GPU.

A mapping form 0, 1, 2 to 00, 10, 11 is different for each computer with more than one graphics device.

So there is currently only one mapping --device 0 to d 00. (possible)

Sorry to interject your development process.

Why are you using "--device x" for mfakto and mfaktc ?
Both their guides say to use "-d x"

Q: Does mfakto support multiple GPUs?
A: No, but you can use the -d option to tell an instance to run on a specific
device. Please also read the next question.

Q Does mfaktc support multiple GPUs?
A Yes, with the exception that a single instance of mfaktc can only use one
GPU. For each GPU you want to run mfaktc on you need (at least) one
instance of mfaktc. For each instance of mfaktc you can use the
commandline option "-d <GPU number>" to specify which GPU to use for each
specific mfaktc instance. Please read the next question, too.

I can run a second task on a second GPU but only if I specify "-d x", as soon as I pass "--device x" (or "-device x") on the command line it defaults to the first GPU.

Can you use "-d x" for linux wrapper at least please ?

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