Opened 14 years ago
Closed 14 years ago
#89 closed defect (invalid)
OpenJDK 6 JRE (SMP Friendly) tries to use both cpus in my dualcore system
| Reported by: | losepete | Owned by: | |
|---|---|---|---|
| Priority: | Feedback Pending | Milestone: | |
| Component: | general | Version: | 1.6.0-b19 RC |
| Severity: | low | Keywords: | |
| Cc: |
Description
I recently downloaded and installed JPhotoBrush http://www.jphotobrushpro.com to show my son, who uses PhotoShop, that there are alternatives to the M$ world.
I have the "SMP friendly" version of java6 installed from ftp://ftp.netlabs.org/pub/java/openjdk6_b19_rc/openjdk6_b19_jre_os2_rc-20110221_mpunsafe.zip and understood that it should only work on 1 cpu.
However, when running JPhotoBrush I see both cpus are in use - and trying to open files simply does not work, the cpus peak and after a short period of time when it is obvious that the app has got problems it is necessary to kill the app.
Change History (2)
comment:1 by , 14 years ago
| Priority: | major → Feedback Pending |
|---|
comment:2 by , 14 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
No feedback for too long. Irrelevant after fixing the SMP issue anyway. Closing.
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I just tried JPhotoBrush 1.3 on my system (eCS 2.0) with OpenJDK RC2 and it works well, no symptoms you described. Note however that I use ACPI.SYS in UNI mode (no /SMP switch in CONFIG.SYS) which may make the difference. You understand it right, the MPUNSAFE flag should cause the OS/2 scheduler to stick the execution of process threads to a single CPU. I don't know why it works differently on your system.
Please try to disable SMP mode and report the results.