Frame rate stutters on android opengl es 2.0

Recently, I started developing some simple opengl es 2.0 android applications, and I have a problem with animation speed. The average fps is always 60 (measured every 100 frames), but sometimes the animation stutters for a very short period of time. This happens even when displaying a single triangle. I do not make any selections when the animation continues and there are no GC events in the logarithm during the animation.

Code executed in a render loop:

public void draw( GLFloatBuffer positionBuffer, int positionBufferOffset, int trianglesCount )
{
    GLES20.glUseProgram( activeGLProgram.glProgramId );

    // Set mvpMatrixValue
    int u_MvpMatrixLocation = GLES20.glGetUniformLocation( activeGLProgram.glProgramId, U_MVP_MATRIX_NAME );
    GLES20.glUniformMatrix4fv( u_MvpMatrixLocation, 1, false, mvpMatrix, 0 );

    // Set vertex position stream
    int a_VertexPositionLocation = GLES20.glGetAttribLocation( activeGLProgram.glProgramId, A_VERTEX_POSITION_NAME );
    GLES20.glBindBuffer( GLES20.GL_ARRAY_BUFFER, positionBuffer.glBufferId );
    GLES20.glEnableVertexAttribArray( a_VertexPositionLocation );

    GLES20.glVertexAttribPointer( a_VertexPositionLocation, POSITION_COORDINATES_PER_VERTEX,
                                  GLES20.GL_FLOAT, false,
                                  0, positionBufferOffset * GLUtilities.BYTES_PER_FLOAT );

    // Draw shape
    GLES20.glDrawArrays( GLES20.GL_TRIANGLES, 0, trianglesCount * 3 );

    // Clear state
    GLES20.glDisableVertexAttribArray( a_VertexPositionLocation );
    GLES20.glBindBuffer( GLES20.GL_ARRAY_BUFFER, 0 );
}

The rest of the code is simple GLSurfaceView and GLSurfaceView.Renderer

Measurements

Debug output format:

D / FRAMERATE: Average fps for the last 100 frames

D / FRAMERATE: minimum frame rendering time for the last 100 frames

D/FRAMERATE: 100

S II:

D/FRAMERATE:(24052): 59.018566
D/FRAMERATE:(24052): maxTimeDiff = 77ms <----
D/FRAMERATE:(24052): minTimeDiff = 3ms
D/FRAMERATE:(24052): 59.900166
D/FRAMERATE:(24052): maxTimeDiff = 24ms
D/FRAMERATE:(24052): minTimeDiff = 10ms
D/FRAMERATE:(24052): 59.780804
D/FRAMERATE:(24052): maxTimeDiff = 28ms
D/FRAMERATE:(24052): minTimeDiff = 10ms
D/FRAMERATE:(24052): 59.4882
D/FRAMERATE:(24052): maxTimeDiff = 32ms
D/FRAMERATE:(24052): minTimeDiff = 3ms
D/FRAMERATE:(24052): 59.840427
D/FRAMERATE:(24052): maxTimeDiff = 24ms
D/FRAMERATE:(24052): minTimeDiff = 9ms
D/FRAMERATE:(24052): 59.920105
D/FRAMERATE:(24052): maxTimeDiff = 22ms
D/FRAMERATE:(24052): minTimeDiff = 12ms
.
.
.
D/FRAMERATE:(24052): 59.116573
D/FRAMERATE:(24052): maxTimeDiff = 68 <--- Here it happend again
D/FRAMERATE:(24052): minTimeDiff = 8

, HTC Desire Z:

D/FRAMERATE: (28788): maxTimeDiff = 20ms
D/FRAMERATE: (28788): minTimeDiff = 15ms
D/FRAMERATE: (28788): 58.27506
D/FRAMERATE: (28788): maxTimeDiff = 22ms
D/FRAMERATE: (28788): minTimeDiff = 12ms
D/FRAMERATE: (28788): 58.27506
D/FRAMERATE: (28788): maxTimeDiff = 22ms
D/FRAMERATE: (28788): minTimeDiff = 14ms
D/FRAMERATE: (28788): 58.27506
D/FRAMERATE: (28788): maxTimeDiff = 20ms
D/FRAMERATE: (28788): minTimeDiff = 14ms

- , ndk?